118 files changed, 10116 insertions, 5390 deletions

diff --git a/kernel/Kconfig.locks b/kernel/Kconfig.locks
new file mode 100644
index 000000000000..88c92fb44618
--- /dev/null
+++ b/kernel/Kconfig.locks
@@ -0,0 +1,202 @@
+#
+# The ARCH_INLINE foo is necessary because select ignores "depends on"
+#
+config ARCH_INLINE_SPIN_TRYLOCK
+        bool
+
+config ARCH_INLINE_SPIN_TRYLOCK_BH
+        bool
+
+config ARCH_INLINE_SPIN_LOCK
+        bool
+
+config ARCH_INLINE_SPIN_LOCK_BH
+        bool
+
+config ARCH_INLINE_SPIN_LOCK_IRQ
+        bool
+
+config ARCH_INLINE_SPIN_LOCK_IRQSAVE
+        bool
+
+config ARCH_INLINE_SPIN_UNLOCK
+        bool
+
+config ARCH_INLINE_SPIN_UNLOCK_BH
+        bool
+
+config ARCH_INLINE_SPIN_UNLOCK_IRQ
+        bool
+
+config ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
+        bool
+
+
+config ARCH_INLINE_READ_TRYLOCK
+        bool
+
+config ARCH_INLINE_READ_LOCK
+        bool
+
+config ARCH_INLINE_READ_LOCK_BH
+        bool
+
+config ARCH_INLINE_READ_LOCK_IRQ
+        bool
+
+config ARCH_INLINE_READ_LOCK_IRQSAVE
+        bool
+
+config ARCH_INLINE_READ_UNLOCK
+        bool
+
+config ARCH_INLINE_READ_UNLOCK_BH
+        bool
+
+config ARCH_INLINE_READ_UNLOCK_IRQ
+        bool
+
+config ARCH_INLINE_READ_UNLOCK_IRQRESTORE
+        bool
+
+
+config ARCH_INLINE_WRITE_TRYLOCK
+        bool
+
+config ARCH_INLINE_WRITE_LOCK
+        bool
+
+config ARCH_INLINE_WRITE_LOCK_BH
+        bool
+
+config ARCH_INLINE_WRITE_LOCK_IRQ
+        bool
+
+config ARCH_INLINE_WRITE_LOCK_IRQSAVE
+        bool
+
+config ARCH_INLINE_WRITE_UNLOCK
+        bool
+
+config ARCH_INLINE_WRITE_UNLOCK_BH
+        bool
+
+config ARCH_INLINE_WRITE_UNLOCK_IRQ
+        bool
+
+config ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
+        bool
+
+#
+# lock_* functions are inlined when:
+#   - DEBUG_SPINLOCK=n and GENERIC_LOCKBREAK=n and ARCH_INLINE_*LOCK=y
+#
+# trylock_* functions are inlined when:
+#   - DEBUG_SPINLOCK=n and ARCH_INLINE_*LOCK=y
+#
+# unlock and unlock_irq functions are inlined when:
+#   - DEBUG_SPINLOCK=n and ARCH_INLINE_*LOCK=y
+#  or
+#   - DEBUG_SPINLOCK=n and PREEMPT=n
+#
+# unlock_bh and unlock_irqrestore functions are inlined when:
+#   - DEBUG_SPINLOCK=n and ARCH_INLINE_*LOCK=y
+#
+
+config INLINE_SPIN_TRYLOCK
+        def_bool !DEBUG_SPINLOCK && ARCH_INLINE_SPIN_TRYLOCK
+
+config INLINE_SPIN_TRYLOCK_BH
+        def_bool !DEBUG_SPINLOCK && ARCH_INLINE_SPIN_TRYLOCK_BH
+
+config INLINE_SPIN_LOCK
+        def_bool !DEBUG_SPINLOCK && !GENERIC_LOCKBREAK && ARCH_INLINE_SPIN_LOCK
+
+config INLINE_SPIN_LOCK_BH
+        def_bool !DEBUG_SPINLOCK && !GENERIC_LOCKBREAK && \
+                 ARCH_INLINE_SPIN_LOCK_BH
+
+config INLINE_SPIN_LOCK_IRQ
+        def_bool !DEBUG_SPINLOCK && !GENERIC_LOCKBREAK && \
+                 ARCH_INLINE_SPIN_LOCK_IRQ
+
+config INLINE_SPIN_LOCK_IRQSAVE
+        def_bool !DEBUG_SPINLOCK && !GENERIC_LOCKBREAK && \
+                 ARCH_INLINE_SPIN_LOCK_IRQSAVE
+
+config INLINE_SPIN_UNLOCK
+        def_bool !DEBUG_SPINLOCK && (!PREEMPT || ARCH_INLINE_SPIN_UNLOCK)
+
+config INLINE_SPIN_UNLOCK_BH
+        def_bool !DEBUG_SPINLOCK && ARCH_INLINE_SPIN_UNLOCK_BH
+
+config INLINE_SPIN_UNLOCK_IRQ
+        def_bool !DEBUG_SPINLOCK && (!PREEMPT || ARCH_INLINE_SPIN_UNLOCK_BH)
+
+config INLINE_SPIN_UNLOCK_IRQRESTORE
+        def_bool !DEBUG_SPINLOCK && ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
+
+
+config INLINE_READ_TRYLOCK
+        def_bool !DEBUG_SPINLOCK && ARCH_INLINE_READ_TRYLOCK
+
+config INLINE_READ_LOCK
+        def_bool !DEBUG_SPINLOCK && !GENERIC_LOCKBREAK && ARCH_INLINE_READ_LOCK
+
+config INLINE_READ_LOCK_BH
+        def_bool !DEBUG_SPINLOCK && !GENERIC_LOCKBREAK && \
+                 ARCH_INLINE_READ_LOCK_BH
+
+config INLINE_READ_LOCK_IRQ
+        def_bool !DEBUG_SPINLOCK && !GENERIC_LOCKBREAK && \
+                 ARCH_INLINE_READ_LOCK_IRQ
+
+config INLINE_READ_LOCK_IRQSAVE
+        def_bool !DEBUG_SPINLOCK && !GENERIC_LOCKBREAK && \
+                 ARCH_INLINE_READ_LOCK_IRQSAVE
+
+config INLINE_READ_UNLOCK
+        def_bool !DEBUG_SPINLOCK && (!PREEMPT || ARCH_INLINE_READ_UNLOCK)
+
+config INLINE_READ_UNLOCK_BH
+        def_bool !DEBUG_SPINLOCK && ARCH_INLINE_READ_UNLOCK_BH
+
+config INLINE_READ_UNLOCK_IRQ
+        def_bool !DEBUG_SPINLOCK && (!PREEMPT || ARCH_INLINE_READ_UNLOCK_BH)
+
+config INLINE_READ_UNLOCK_IRQRESTORE
+        def_bool !DEBUG_SPINLOCK && ARCH_INLINE_READ_UNLOCK_IRQRESTORE
+
+
+config INLINE_WRITE_TRYLOCK
+        def_bool !DEBUG_SPINLOCK && ARCH_INLINE_WRITE_TRYLOCK
+
+config INLINE_WRITE_LOCK
+        def_bool !DEBUG_SPINLOCK && !GENERIC_LOCKBREAK && ARCH_INLINE_WRITE_LOCK
+
+config INLINE_WRITE_LOCK_BH
+        def_bool !DEBUG_SPINLOCK && !GENERIC_LOCKBREAK && \
+                 ARCH_INLINE_WRITE_LOCK_BH
+
+config INLINE_WRITE_LOCK_IRQ
+        def_bool !DEBUG_SPINLOCK && !GENERIC_LOCKBREAK && \
+                 ARCH_INLINE_WRITE_LOCK_IRQ
+
+config INLINE_WRITE_LOCK_IRQSAVE
+        def_bool !DEBUG_SPINLOCK && !GENERIC_LOCKBREAK && \
+                 ARCH_INLINE_WRITE_LOCK_IRQSAVE
+
+config INLINE_WRITE_UNLOCK
+        def_bool !DEBUG_SPINLOCK && (!PREEMPT || ARCH_INLINE_WRITE_UNLOCK)
+
+config INLINE_WRITE_UNLOCK_BH
+        def_bool !DEBUG_SPINLOCK && ARCH_INLINE_WRITE_UNLOCK_BH
+
+config INLINE_WRITE_UNLOCK_IRQ
+        def_bool !DEBUG_SPINLOCK && (!PREEMPT || ARCH_INLINE_WRITE_UNLOCK_BH)
+
+config INLINE_WRITE_UNLOCK_IRQRESTORE
+        def_bool !DEBUG_SPINLOCK && ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
+
+config MUTEX_SPIN_ON_OWNER
+        def_bool SMP && !DEBUG_MUTEXES && !HAVE_DEFAULT_NO_SPIN_MUTEXES
diff --git a/kernel/Makefile b/kernel/Makefile
index d7c13d249b2d..864ff75d65f2 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -4,7 +4,7 @@
 
 obj-y     = sched.o fork.o exec_domain.o panic.o printk.o \
             cpu.o exit.o itimer.o time.o softirq.o resource.o \
-            sysctl.o capability.o ptrace.o timer.o user.o \
+            sysctl.o sysctl_binary.o capability.o ptrace.o timer.o user.o \
             signal.o sys.o kmod.o workqueue.o pid.o \
             rcupdate.o extable.o params.o posix-timers.o \
             kthread.o wait.o kfifo.o sys_ni.o posix-cpu-timers.o mutex.o \
@@ -21,6 +21,7 @@ CFLAGS_REMOVE_mutex-debug.o = -pg
 CFLAGS_REMOVE_rtmutex-debug.o = -pg
 CFLAGS_REMOVE_cgroup-debug.o = -pg
 CFLAGS_REMOVE_sched_clock.o = -pg
+CFLAGS_REMOVE_perf_event.o = -pg
 endif
 
 obj-$(CONFIG_FREEZER) += freezer.o
@@ -82,6 +83,7 @@ obj-$(CONFIG_RCU_TORTURE_TEST) += rcutorture.o
 obj-$(CONFIG_TREE_RCU) += rcutree.o
 obj-$(CONFIG_TREE_PREEMPT_RCU) += rcutree.o
 obj-$(CONFIG_TREE_RCU_TRACE) += rcutree_trace.o
+obj-$(CONFIG_TINY_RCU) += rcutiny.o
 obj-$(CONFIG_RELAY) += relay.o
 obj-$(CONFIG_SYSCTL) += utsname_sysctl.o
 obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o
@@ -96,6 +98,8 @@ obj-$(CONFIG_SMP) += sched_cpupri.o
 obj-$(CONFIG_SLOW_WORK) += slow-work.o
 obj-$(CONFIG_SLOW_WORK_DEBUG) += slow-work-debugfs.o
 obj-$(CONFIG_PERF_EVENTS) += perf_event.o
+obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
+obj-$(CONFIG_USER_RETURN_NOTIFIER) += user-return-notifier.o
 
 ifneq ($(CONFIG_SCHED_OMIT_FRAME_POINTER),y)
 # According to Alan Modra <alan@linuxcare.com.au>, the -fno-omit-frame-pointer is
diff --git a/kernel/acct.c b/kernel/acct.c
index 9a4715a2f6bf..a6605ca921b6 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -536,7 +536,8 @@ static void do_acct_process(struct bsd_acct_struct *acct,
         do_div(elapsed, AHZ);
         ac.ac_btime = get_seconds() - elapsed;
         /* we really need to bite the bullet and change layout */
-        current_uid_gid(&ac.ac_uid, &ac.ac_gid);
+        ac.ac_uid = orig_cred->uid;
+        ac.ac_gid = orig_cred->gid;
 #if ACCT_VERSION==2
         ac.ac_ahz = AHZ;
 #endif
diff --git a/kernel/capability.c b/kernel/capability.c
index 4e17041963f5..7f876e60521f 100644
--- a/kernel/capability.c
+++ b/kernel/capability.c
@@ -29,7 +29,6 @@ EXPORT_SYMBOL(__cap_empty_set);
 EXPORT_SYMBOL(__cap_full_set);
 EXPORT_SYMBOL(__cap_init_eff_set);
 
-#ifdef CONFIG_SECURITY_FILE_CAPABILITIES
 int file_caps_enabled = 1;
 
 static int __init file_caps_disable(char *str)
@@ -38,7 +37,6 @@ static int __init file_caps_disable(char *str)
         return 1;
 }
 __setup("no_file_caps", file_caps_disable);
-#endif
 
 /*
  * More recent versions of libcap are available from:
@@ -169,8 +167,8 @@ SYSCALL_DEFINE2(capget, cap_user_header_t, header, cap_user_data_t, dataptr)
         kernel_cap_t pE, pI, pP;
 
         ret = cap_validate_magic(header, &tocopy);
-        if (ret != 0)
-                return ret;
+        if ((dataptr == NULL) || (ret != 0))
+                return ((dataptr == NULL) && (ret == -EINVAL)) ? 0 : ret;
 
         if (get_user(pid, &header->pid))
                 return -EFAULT;
@@ -238,7 +236,7 @@ SYSCALL_DEFINE2(capget, cap_user_header_t, header, cap_user_data_t, dataptr)
 SYSCALL_DEFINE2(capset, cap_user_header_t, header, const cap_user_data_t, data)
 {
         struct __user_cap_data_struct kdata[_KERNEL_CAPABILITY_U32S];
-        unsigned i, tocopy;
+        unsigned i, tocopy, copybytes;
         kernel_cap_t inheritable, permitted, effective;
         struct cred *new;
         int ret;
@@ -255,8 +253,11 @@ SYSCALL_DEFINE2(capset, cap_user_header_t, header, const cap_user_data_t, data)
         if (pid != 0 && pid != task_pid_vnr(current))
                 return -EPERM;
 
-        if (copy_from_user(&kdata, data,
-                           tocopy * sizeof(struct __user_cap_data_struct)))
+        copybytes = tocopy * sizeof(struct __user_cap_data_struct);
+        if (copybytes > sizeof(kdata))
+                return -EFAULT;
+
+        if (copy_from_user(&kdata, data, copybytes))
                 return -EFAULT;
 
         for (i = 0; i < tocopy; i++) {
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 6ba0f1ecb212..291ac586f37f 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -212,6 +212,8 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
         err = __raw_notifier_call_chain(&cpu_chain, CPU_DOWN_PREPARE | mod,
                                         hcpu, -1, &nr_calls);
         if (err == NOTIFY_BAD) {
+                set_cpu_active(cpu, true);
+
                 nr_calls--;
                 __raw_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED | mod,
                                           hcpu, nr_calls, NULL);
@@ -223,11 +225,11 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
 
         /* Ensure that we are not runnable on dying cpu */
         cpumask_copy(old_allowed, &current->cpus_allowed);
-        set_cpus_allowed_ptr(current,
-                             cpumask_of(cpumask_any_but(cpu_online_mask, cpu)));
+        set_cpus_allowed_ptr(current, cpu_active_mask);
 
         err = __stop_machine(take_cpu_down, &tcd_param, cpumask_of(cpu));
         if (err) {
+                set_cpu_active(cpu, true);
                 /* CPU didn't die: tell everyone.  Can't complain. */
                 if (raw_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED | mod,
                                             hcpu) == NOTIFY_BAD)
@@ -292,9 +294,6 @@ int __ref cpu_down(unsigned int cpu)
 
         err = _cpu_down(cpu, 0);
 
-        if (cpu_online(cpu))
-                set_cpu_active(cpu, true);
-
 out:
         cpu_maps_update_done();
         stop_machine_destroy();
@@ -387,15 +386,23 @@ int disable_nonboot_cpus(void)
          * with the userspace trying to use the CPU hotplug at the same time
          */
         cpumask_clear(frozen_cpus);
+
+        for_each_online_cpu(cpu) {
+                if (cpu == first_cpu)
+                        continue;
+                set_cpu_active(cpu, false);
+        }
+
+        synchronize_sched();
+
         printk("Disabling non-boot CPUs ...\n");
         for_each_online_cpu(cpu) {
                 if (cpu == first_cpu)
                         continue;
                 error = _cpu_down(cpu, 1);
-                if (!error) {
+                if (!error)
                         cpumask_set_cpu(cpu, frozen_cpus);
-                        printk("CPU%d is down\n", cpu);
-                } else {
+                else {
                         printk(KERN_ERR "Error taking CPU%d down: %d\n",
                                 cpu, error);
                         break;
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index b5cb469d2545..ba401fab459f 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -537,8 +537,7 @@ update_domain_attr_tree(struct sched_domain_attr *dattr, struct cpuset *c)
  *      element of the partition (one sched domain) to be passed to
  *      partition_sched_domains().
  */
-/* FIXME: see the FIXME in partition_sched_domains() */
-static int generate_sched_domains(struct cpumask **domains,
+static int generate_sched_domains(cpumask_var_t **domains,
                         struct sched_domain_attr **attributes)
 {
         LIST_HEAD(q);           /* queue of cpusets to be scanned */
@@ -546,7 +545,7 @@ static int generate_sched_domains(struct cpumask **domains,
         struct cpuset **csa;    /* array of all cpuset ptrs */
         int csn;                /* how many cpuset ptrs in csa so far */
         int i, j, k;            /* indices for partition finding loops */
-        struct cpumask *doms;   /* resulting partition; i.e. sched domains */
+        cpumask_var_t *doms;    /* resulting partition; i.e. sched domains */
         struct sched_domain_attr *dattr;  /* attributes for custom domains */
         int ndoms = 0;          /* number of sched domains in result */
         int nslot;              /* next empty doms[] struct cpumask slot */
@@ -557,7 +556,8 @@ static int generate_sched_domains(struct cpumask **domains,
 
         /* Special case for the 99% of systems with one, full, sched domain */
         if (is_sched_load_balance(&top_cpuset)) {
-                doms = kmalloc(cpumask_size(), GFP_KERNEL);
+                ndoms = 1;
+                doms = alloc_sched_domains(ndoms);
                 if (!doms)
                         goto done;
 
@@ -566,9 +566,8 @@ static int generate_sched_domains(struct cpumask **domains,
                         *dattr = SD_ATTR_INIT;
                         update_domain_attr_tree(dattr, &top_cpuset);
                 }
-                cpumask_copy(doms, top_cpuset.cpus_allowed);
+                cpumask_copy(doms[0], top_cpuset.cpus_allowed);
 
-                ndoms = 1;
                 goto done;
         }
 
@@ -636,7 +635,7 @@ restart:
          * Now we know how many domains to create.
          * Convert <csn, csa> to <ndoms, doms> and populate cpu masks.
          */
-        doms = kmalloc(ndoms * cpumask_size(), GFP_KERNEL);
+        doms = alloc_sched_domains(ndoms);
         if (!doms)
                 goto done;
 
@@ -656,7 +655,7 @@ restart:
                         continue;
                 }
 
-                dp = doms + nslot;
+                dp = doms[nslot];
 
                 if (nslot == ndoms) {
                         static int warnings = 10;
@@ -718,7 +717,7 @@ done:
 static void do_rebuild_sched_domains(struct work_struct *unused)
 {
         struct sched_domain_attr *attr;
-        struct cpumask *doms;
+        cpumask_var_t *doms;
         int ndoms;
 
         get_online_cpus();
@@ -738,7 +737,7 @@ static void do_rebuild_sched_domains(struct work_struct *unused)
 {
 }
 
-static int generate_sched_domains(struct cpumask **domains,
+static int generate_sched_domains(cpumask_var_t **domains,
                         struct sched_domain_attr **attributes)
 {
         *domains = NULL;
@@ -873,7 +872,7 @@ static int update_cpumask(struct cpuset *cs, struct cpuset *trialcs,
                 if (retval < 0)
                         return retval;
 
-                if (!cpumask_subset(trialcs->cpus_allowed, cpu_online_mask))
+                if (!cpumask_subset(trialcs->cpus_allowed, cpu_active_mask))
                         return -EINVAL;
         }
         retval = validate_change(cs, trialcs);
@@ -2011,7 +2010,7 @@ static void scan_for_empty_cpusets(struct cpuset *root)
                 }
 
                 /* Continue past cpusets with all cpus, mems online */
-                if (cpumask_subset(cp->cpus_allowed, cpu_online_mask) &&
+                if (cpumask_subset(cp->cpus_allowed, cpu_active_mask) &&
                     nodes_subset(cp->mems_allowed, node_states[N_HIGH_MEMORY]))
                         continue;
 
@@ -2020,7 +2019,7 @@ static void scan_for_empty_cpusets(struct cpuset *root)
                 /* Remove offline cpus and mems from this cpuset. */
                 mutex_lock(&callback_mutex);
                 cpumask_and(cp->cpus_allowed, cp->cpus_allowed,
-                            cpu_online_mask);
+                            cpu_active_mask);
                 nodes_and(cp->mems_allowed, cp->mems_allowed,
                                                 node_states[N_HIGH_MEMORY]);
                 mutex_unlock(&callback_mutex);
@@ -2052,14 +2051,16 @@ static int cpuset_track_online_cpus(struct notifier_block *unused_nb,
                                 unsigned long phase, void *unused_cpu)
 {
         struct sched_domain_attr *attr;
-        struct cpumask *doms;
+        cpumask_var_t *doms;
         int ndoms;
 
         switch (phase) {
         case CPU_ONLINE:
         case CPU_ONLINE_FROZEN:
-        case CPU_DEAD:
-        case CPU_DEAD_FROZEN:
+        case CPU_DOWN_PREPARE:
+        case CPU_DOWN_PREPARE_FROZEN:
+        case CPU_DOWN_FAILED:
+        case CPU_DOWN_FAILED_FROZEN:
                 break;
 
         default:
@@ -2068,7 +2069,7 @@ static int cpuset_track_online_cpus(struct notifier_block *unused_nb,
 
         cgroup_lock();
         mutex_lock(&callback_mutex);
-        cpumask_copy(top_cpuset.cpus_allowed, cpu_online_mask);
+        cpumask_copy(top_cpuset.cpus_allowed, cpu_active_mask);
         mutex_unlock(&callback_mutex);
         scan_for_empty_cpusets(&top_cpuset);
         ndoms = generate_sched_domains(&doms, &attr);
@@ -2115,7 +2116,7 @@ static int cpuset_track_online_nodes(struct notifier_block *self,
 
 void __init cpuset_init_smp(void)
 {
-        cpumask_copy(top_cpuset.cpus_allowed, cpu_online_mask);
+        cpumask_copy(top_cpuset.cpus_allowed, cpu_active_mask);
         top_cpuset.mems_allowed = node_states[N_HIGH_MEMORY];
 
         hotcpu_notifier(cpuset_track_online_cpus, 0);
@@ -2537,15 +2538,9 @@ const struct file_operations proc_cpuset_operations = {
 };
 #endif /* CONFIG_PROC_PID_CPUSET */
 
-/* Display task cpus_allowed, mems_allowed in /proc/<pid>/status file. */
+/* Display task mems_allowed in /proc/<pid>/status file. */
 void cpuset_task_status_allowed(struct seq_file *m, struct task_struct *task)
 {
-        seq_printf(m, "Cpus_allowed:\t");
-        seq_cpumask(m, &task->cpus_allowed);
-        seq_printf(m, "\n");
-        seq_printf(m, "Cpus_allowed_list:\t");
-        seq_cpumask_list(m, &task->cpus_allowed);
-        seq_printf(m, "\n");
         seq_printf(m, "Mems_allowed:\t");
         seq_nodemask(m, &task->mems_allowed);
         seq_printf(m, "\n");
diff --git a/kernel/exit.c b/kernel/exit.c
index f7864ac2ecc1..5962d7ccf243 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -49,6 +49,7 @@
 #include <linux/init_task.h>
 #include <linux/perf_event.h>
 #include <trace/events/sched.h>
+#include <linux/hw_breakpoint.h>
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -110,9 +111,9 @@ static void __exit_signal(struct task_struct *tsk)
                  * We won't ever get here for the group leader, since it
                  * will have been the last reference on the signal_struct.
                  */
-                sig->utime = cputime_add(sig->utime, task_utime(tsk));
-                sig->stime = cputime_add(sig->stime, task_stime(tsk));
-                sig->gtime = cputime_add(sig->gtime, task_gtime(tsk));
+                sig->utime = cputime_add(sig->utime, tsk->utime);
+                sig->stime = cputime_add(sig->stime, tsk->stime);
+                sig->gtime = cputime_add(sig->gtime, tsk->gtime);
                 sig->min_flt += tsk->min_flt;
                 sig->maj_flt += tsk->maj_flt;
                 sig->nvcsw += tsk->nvcsw;
@@ -932,7 +933,7 @@ NORET_TYPE void do_exit(long code)
          * an exiting task cleaning up the robust pi futexes.
          */
         smp_mb();
-        spin_unlock_wait(&tsk->pi_lock);
+        raw_spin_unlock_wait(&tsk->pi_lock);
 
         if (unlikely(in_atomic()))
                 printk(KERN_INFO "note: %s[%d] exited with preempt_count %d\n",
@@ -970,7 +971,7 @@ NORET_TYPE void do_exit(long code)
         exit_thread();
         cgroup_exit(tsk, 1);
 
-        if (group_dead && tsk->signal->leader)
+        if (group_dead)
                 disassociate_ctty(1);
 
         module_put(task_thread_info(tsk)->exec_domain->module);
@@ -978,6 +979,10 @@ NORET_TYPE void do_exit(long code)
         proc_exit_connector(tsk);
 
         /*
+         * FIXME: do that only when needed, using sched_exit tracepoint
+         */
+        flush_ptrace_hw_breakpoint(tsk);
+        /*
          * Flush inherited counters to the parent - before the parent
          * gets woken up by child-exit notifications.
          */
@@ -1004,7 +1009,7 @@ NORET_TYPE void do_exit(long code)
         tsk->flags |= PF_EXITPIDONE;
 
         if (tsk->io_context)
-                exit_io_context();
+                exit_io_context(tsk);
 
         if (tsk->splice_pipe)
                 __free_pipe_info(tsk->splice_pipe);
@@ -1205,6 +1210,7 @@ static int wait_task_zombie(struct wait_opts *wo, struct task_struct *p)
                 struct signal_struct *psig;
                 struct signal_struct *sig;
                 unsigned long maxrss;
+                cputime_t tgutime, tgstime;
 
                 /*
                  * The resource counters for the group leader are in its
@@ -1220,20 +1226,23 @@ static int wait_task_zombie(struct wait_opts *wo, struct task_struct *p)
                  * need to protect the access to parent->signal fields,
                  * as other threads in the parent group can be right
                  * here reaping other children at the same time.
+                 *
+                 * We use thread_group_times() to get times for the thread
+                 * group, which consolidates times for all threads in the
+                 * group including the group leader.
                  */
+                thread_group_times(p, &tgutime, &tgstime);
                 spin_lock_irq(&p->real_parent->sighand->siglock);
                 psig = p->real_parent->signal;
                 sig = p->signal;
                 psig->cutime =
                         cputime_add(psig->cutime,
-                        cputime_add(p->utime,
-                        cputime_add(sig->utime,
-                                    sig->cutime)));
+                        cputime_add(tgutime,
+                                    sig->cutime));
                 psig->cstime =
                         cputime_add(psig->cstime,
-                        cputime_add(p->stime,
-                        cputime_add(sig->stime,
-                                    sig->cstime)));
+                        cputime_add(tgstime,
+                                    sig->cstime));
                 psig->cgtime =
                         cputime_add(psig->cgtime,
                         cputime_add(p->gtime,
diff --git a/kernel/fork.c b/kernel/fork.c
index 166b8c49257c..202a0ba63d3c 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -64,6 +64,7 @@
 #include <linux/magic.h>
 #include <linux/perf_event.h>
 #include <linux/posix-timers.h>
+#include <linux/user-return-notifier.h>
 
 #include <asm/pgtable.h>
 #include <asm/pgalloc.h>
@@ -249,6 +250,7 @@ static struct task_struct *dup_task_struct(struct task_struct *orig)
                 goto out;
 
         setup_thread_stack(tsk, orig);
+        clear_user_return_notifier(tsk);
         stackend = end_of_stack(tsk);
         *stackend = STACK_END_MAGIC;    /* for overflow detection */
 
@@ -884,6 +886,9 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
         sig->utime = sig->stime = sig->cutime = sig->cstime = cputime_zero;
         sig->gtime = cputime_zero;
         sig->cgtime = cputime_zero;
+#ifndef CONFIG_VIRT_CPU_ACCOUNTING
+        sig->prev_utime = sig->prev_stime = cputime_zero;
+#endif
         sig->nvcsw = sig->nivcsw = sig->cnvcsw = sig->cnivcsw = 0;
         sig->min_flt = sig->maj_flt = sig->cmin_flt = sig->cmaj_flt = 0;
         sig->inblock = sig->oublock = sig->cinblock = sig->coublock = 0;
@@ -934,9 +939,9 @@ SYSCALL_DEFINE1(set_tid_address, int __user *, tidptr)
 
 static void rt_mutex_init_task(struct task_struct *p)
 {
-        spin_lock_init(&p->pi_lock);
+        raw_spin_lock_init(&p->pi_lock);
 #ifdef CONFIG_RT_MUTEXES
-        plist_head_init(&p->pi_waiters, &p->pi_lock);
+        plist_head_init_raw(&p->pi_waiters, &p->pi_lock);
         p->pi_blocked_on = NULL;
 #endif
 }
@@ -1066,8 +1071,10 @@ static struct task_struct *copy_process(unsigned long clone_flags,
         p->gtime = cputime_zero;
         p->utimescaled = cputime_zero;
         p->stimescaled = cputime_zero;
+#ifndef CONFIG_VIRT_CPU_ACCOUNTING
         p->prev_utime = cputime_zero;
         p->prev_stime = cputime_zero;
+#endif
 
         p->default_timer_slack_ns = current->timer_slack_ns;
 
@@ -1120,6 +1127,10 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 #ifdef CONFIG_DEBUG_MUTEXES
         p->blocked_on = NULL; /* not blocked yet */
 #endif
+#ifdef CONFIG_CGROUP_MEM_RES_CTLR
+        p->memcg_batch.do_batch = 0;
+        p->memcg_batch.memcg = NULL;
+#endif
 
         p->bts = NULL;
 
@@ -1199,9 +1210,10 @@ static struct task_struct *copy_process(unsigned long clone_flags,
                 p->sas_ss_sp = p->sas_ss_size = 0;
 
         /*
-         * Syscall tracing should be turned off in the child regardless
-         * of CLONE_PTRACE.
+         * Syscall tracing and stepping should be turned off in the
+         * child regardless of CLONE_PTRACE.
          */
+        user_disable_single_step(p);
         clear_tsk_thread_flag(p, TIF_SYSCALL_TRACE);
 #ifdef TIF_SYSCALL_EMU
         clear_tsk_thread_flag(p, TIF_SYSCALL_EMU);
@@ -1310,7 +1322,8 @@ bad_fork_free_pid:
         if (pid != &init_struct_pid)
                 free_pid(pid);
 bad_fork_cleanup_io:
-        put_io_context(p->io_context);
+        if (p->io_context)
+                exit_io_context(p);
 bad_fork_cleanup_namespaces:
         exit_task_namespaces(p);
 bad_fork_cleanup_mm:
diff --git a/kernel/futex.c b/kernel/futex.c
index fb65e822fc41..8e3c3ffe1b9a 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -304,8 +304,14 @@ void put_futex_key(int fshared, union futex_key *key)
  */
 static int fault_in_user_writeable(u32 __user *uaddr)
 {
-        int ret = get_user_pages(current, current->mm, (unsigned long)uaddr,
-                                 1, 1, 0, NULL, NULL);
+        struct mm_struct *mm = current->mm;
+        int ret;
+
+        down_read(&mm->mmap_sem);
+        ret = get_user_pages(current, mm, (unsigned long)uaddr,
+                             1, 1, 0, NULL, NULL);
+        up_read(&mm->mmap_sem);
+
         return ret < 0 ? ret : 0;
 }
 
@@ -397,9 +403,9 @@ static void free_pi_state(struct futex_pi_state *pi_state)
          * and has cleaned up the pi_state already
          */
         if (pi_state->owner) {
-                spin_lock_irq(&pi_state->owner->pi_lock);
+                raw_spin_lock_irq(&pi_state->owner->pi_lock);
                 list_del_init(&pi_state->list);
-                spin_unlock_irq(&pi_state->owner->pi_lock);
+                raw_spin_unlock_irq(&pi_state->owner->pi_lock);
 
                 rt_mutex_proxy_unlock(&pi_state->pi_mutex, pi_state->owner);
         }
@@ -464,18 +470,18 @@ void exit_pi_state_list(struct task_struct *curr)
          * pi_state_list anymore, but we have to be careful
          * versus waiters unqueueing themselves:
          */
-        spin_lock_irq(&curr->pi_lock);
+        raw_spin_lock_irq(&curr->pi_lock);
         while (!list_empty(head)) {
 
                 next = head->next;
                 pi_state = list_entry(next, struct futex_pi_state, list);
                 key = pi_state->key;
                 hb = hash_futex(&key);
-                spin_unlock_irq(&curr->pi_lock);
+                raw_spin_unlock_irq(&curr->pi_lock);
 
                 spin_lock(&hb->lock);
 
-                spin_lock_irq(&curr->pi_lock);
+                raw_spin_lock_irq(&curr->pi_lock);
                 /*
                  * We dropped the pi-lock, so re-check whether this
                  * task still owns the PI-state:
@@ -489,15 +495,15 @@ void exit_pi_state_list(struct task_struct *curr)
                 WARN_ON(list_empty(&pi_state->list));
                 list_del_init(&pi_state->list);
                 pi_state->owner = NULL;
-                spin_unlock_irq(&curr->pi_lock);
+                raw_spin_unlock_irq(&curr->pi_lock);
 
                 rt_mutex_unlock(&pi_state->pi_mutex);
 
                 spin_unlock(&hb->lock);
 
-                spin_lock_irq(&curr->pi_lock);
+                raw_spin_lock_irq(&curr->pi_lock);
         }
-        spin_unlock_irq(&curr->pi_lock);
+        raw_spin_unlock_irq(&curr->pi_lock);
 }
 
 static int
@@ -552,7 +558,7 @@ lookup_pi_state(u32 uval, struct futex_hash_bucket *hb,
          * change of the task flags, we do this protected by
          * p->pi_lock:
          */
-        spin_lock_irq(&p->pi_lock);
+        raw_spin_lock_irq(&p->pi_lock);
         if (unlikely(p->flags & PF_EXITING)) {
                 /*
                  * The task is on the way out. When PF_EXITPIDONE is
@@ -561,7 +567,7 @@ lookup_pi_state(u32 uval, struct futex_hash_bucket *hb,
                  */
                 int ret = (p->flags & PF_EXITPIDONE) ? -ESRCH : -EAGAIN;
 
-                spin_unlock_irq(&p->pi_lock);
+                raw_spin_unlock_irq(&p->pi_lock);
                 put_task_struct(p);
                 return ret;
         }
@@ -580,7 +586,7 @@ lookup_pi_state(u32 uval, struct futex_hash_bucket *hb,
         WARN_ON(!list_empty(&pi_state->list));
         list_add(&pi_state->list, &p->pi_state_list);
         pi_state->owner = p;
-        spin_unlock_irq(&p->pi_lock);
+        raw_spin_unlock_irq(&p->pi_lock);
 
         put_task_struct(p);
 
@@ -754,7 +760,7 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this)
         if (!pi_state)
                 return -EINVAL;
 
-        spin_lock(&pi_state->pi_mutex.wait_lock);
+        raw_spin_lock(&pi_state->pi_mutex.wait_lock);
         new_owner = rt_mutex_next_owner(&pi_state->pi_mutex);
 
         /*
@@ -783,23 +789,23 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this)
                 else if (curval != uval)
                         ret = -EINVAL;
                 if (ret) {
-                        spin_unlock(&pi_state->pi_mutex.wait_lock);
+                        raw_spin_unlock(&pi_state->pi_mutex.wait_lock);
                         return ret;
                 }
         }
 
-        spin_lock_irq(&pi_state->owner->pi_lock);
+        raw_spin_lock_irq(&pi_state->owner->pi_lock);
         WARN_ON(list_empty(&pi_state->list));
         list_del_init(&pi_state->list);
-        spin_unlock_irq(&pi_state->owner->pi_lock);
+        raw_spin_unlock_irq(&pi_state->owner->pi_lock);
 
-        spin_lock_irq(&new_owner->pi_lock);
+        raw_spin_lock_irq(&new_owner->pi_lock);
         WARN_ON(!list_empty(&pi_state->list));
         list_add(&pi_state->list, &new_owner->pi_state_list);
         pi_state->owner = new_owner;
-        spin_unlock_irq(&new_owner->pi_lock);
+        raw_spin_unlock_irq(&new_owner->pi_lock);
 
-        spin_unlock(&pi_state->pi_mutex.wait_lock);
+        raw_spin_unlock(&pi_state->pi_mutex.wait_lock);
         rt_mutex_unlock(&pi_state->pi_mutex);
 
         return 0;
@@ -1004,7 +1010,7 @@ void requeue_futex(struct futex_q *q, struct futex_hash_bucket *hb1,
                 plist_add(&q->list, &hb2->chain);
                 q->lock_ptr = &hb2->lock;
 #ifdef CONFIG_DEBUG_PI_LIST
-                q->list.plist.lock = &hb2->lock;
+                q->list.plist.spinlock = &hb2->lock;
 #endif
         }
         get_futex_key_refs(key2);
@@ -1040,7 +1046,7 @@ void requeue_pi_wake_futex(struct futex_q *q, union futex_key *key,
 
         q->lock_ptr = &hb->lock;
 #ifdef CONFIG_DEBUG_PI_LIST
-        q->list.plist.lock = &hb->lock;
+        q->list.plist.spinlock = &hb->lock;
 #endif
 
         wake_up_state(q->task, TASK_NORMAL);
@@ -1388,7 +1394,7 @@ static inline void queue_me(struct futex_q *q, struct futex_hash_bucket *hb)
 
         plist_node_init(&q->list, prio);
 #ifdef CONFIG_DEBUG_PI_LIST
-        q->list.plist.lock = &hb->lock;
+        q->list.plist.spinlock = &hb->lock;
 #endif
         plist_add(&q->list, &hb->chain);
         q->task = current;
@@ -1523,18 +1529,18 @@ retry:
          * itself.
          */
         if (pi_state->owner != NULL) {
-                spin_lock_irq(&pi_state->owner->pi_lock);
+                raw_spin_lock_irq(&pi_state->owner->pi_lock);
                 WARN_ON(list_empty(&pi_state->list));
                 list_del_init(&pi_state->list);
-                spin_unlock_irq(&pi_state->owner->pi_lock);
+                raw_spin_unlock_irq(&pi_state->owner->pi_lock);
         }
 
         pi_state->owner = newowner;
 
-        spin_lock_irq(&newowner->pi_lock);
+        raw_spin_lock_irq(&newowner->pi_lock);
         WARN_ON(!list_empty(&pi_state->list));
         list_add(&pi_state->list, &newowner->pi_state_list);
-        spin_unlock_irq(&newowner->pi_lock);
+        raw_spin_unlock_irq(&newowner->pi_lock);
         return 0;
 
         /*
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 3e1c36e7998f..0086628b6e97 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -127,11 +127,11 @@ struct hrtimer_clock_base *lock_hrtimer_base(const struct hrtimer *timer,
         for (;;) {
                 base = timer->base;
                 if (likely(base != NULL)) {
-                        spin_lock_irqsave(&base->cpu_base->lock, *flags);
+                        raw_spin_lock_irqsave(&base->cpu_base->lock, *flags);
                         if (likely(base == timer->base))
                                 return base;
                         /* The timer has migrated to another CPU: */
-                        spin_unlock_irqrestore(&base->cpu_base->lock, *flags);
+                        raw_spin_unlock_irqrestore(&base->cpu_base->lock, *flags);
                 }
                 cpu_relax();
         }
@@ -208,13 +208,13 @@ again:
 
                 /* See the comment in lock_timer_base() */
                 timer->base = NULL;
-                spin_unlock(&base->cpu_base->lock);
-                spin_lock(&new_base->cpu_base->lock);
+                raw_spin_unlock(&base->cpu_base->lock);
+                raw_spin_lock(&new_base->cpu_base->lock);
 
                 if (cpu != this_cpu && hrtimer_check_target(timer, new_base)) {
                         cpu = this_cpu;
-                        spin_unlock(&new_base->cpu_base->lock);
-                        spin_lock(&base->cpu_base->lock);
+                        raw_spin_unlock(&new_base->cpu_base->lock);
+                        raw_spin_lock(&base->cpu_base->lock);
                         timer->base = base;
                         goto again;
                 }
@@ -230,7 +230,7 @@ lock_hrtimer_base(const struct hrtimer *timer, unsigned long *flags)
 {
         struct hrtimer_clock_base *base = timer->base;
 
-        spin_lock_irqsave(&base->cpu_base->lock, *flags);
+        raw_spin_lock_irqsave(&base->cpu_base->lock, *flags);
 
         return base;
 }
@@ -557,7 +557,7 @@ hrtimer_force_reprogram(struct hrtimer_cpu_base *cpu_base, int skip_equal)
 static int hrtimer_reprogram(struct hrtimer *timer,
                              struct hrtimer_clock_base *base)
 {
-        ktime_t *expires_next = &__get_cpu_var(hrtimer_bases).expires_next;
+        struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
         ktime_t expires = ktime_sub(hrtimer_get_expires(timer), base->offset);
         int res;
 
@@ -582,7 +582,16 @@ static int hrtimer_reprogram(struct hrtimer *timer,
         if (expires.tv64 < 0)
                 return -ETIME;
 
-        if (expires.tv64 >= expires_next->tv64)
+        if (expires.tv64 >= cpu_base->expires_next.tv64)
+                return 0;
+
+        /*
+         * If a hang was detected in the last timer interrupt then we
+         * do not schedule a timer which is earlier than the expiry
+         * which we enforced in the hang detection. We want the system
+         * to make progress.
+         */
+        if (cpu_base->hang_detected)
                 return 0;
 
         /*
@@ -590,7 +599,7 @@ static int hrtimer_reprogram(struct hrtimer *timer,
          */
         res = tick_program_event(expires, 0);
         if (!IS_ERR_VALUE(res))
-                *expires_next = expires;
+                cpu_base->expires_next = expires;
         return res;
 }
 
@@ -619,12 +628,12 @@ static void retrigger_next_event(void *arg)
         base = &__get_cpu_var(hrtimer_bases);
 
         /* Adjust CLOCK_REALTIME offset */
-        spin_lock(&base->lock);
+        raw_spin_lock(&base->lock);
         base->clock_base[CLOCK_REALTIME].offset =
                 timespec_to_ktime(realtime_offset);
 
         hrtimer_force_reprogram(base, 0);
-        spin_unlock(&base->lock);
+        raw_spin_unlock(&base->lock);
 }
 
 /*
@@ -685,9 +694,9 @@ static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
 {
         if (base->cpu_base->hres_active && hrtimer_reprogram(timer, base)) {
                 if (wakeup) {
-                        spin_unlock(&base->cpu_base->lock);
+                        raw_spin_unlock(&base->cpu_base->lock);
                         raise_softirq_irqoff(HRTIMER_SOFTIRQ);
-                        spin_lock(&base->cpu_base->lock);
+                        raw_spin_lock(&base->cpu_base->lock);
                 } else
                         __raise_softirq_irqoff(HRTIMER_SOFTIRQ);
 
@@ -747,17 +756,33 @@ static inline void hrtimer_init_timer_hres(struct hrtimer *timer) { }
 
 #endif /* CONFIG_HIGH_RES_TIMERS */
 
-#ifdef CONFIG_TIMER_STATS
-void __timer_stats_hrtimer_set_start_info(struct hrtimer *timer, void *addr)
+static inline void timer_stats_hrtimer_set_start_info(struct hrtimer *timer)
 {
+#ifdef CONFIG_TIMER_STATS
         if (timer->start_site)
                 return;
-
-        timer->start_site = addr;
+        timer->start_site = __builtin_return_address(0);
         memcpy(timer->start_comm, current->comm, TASK_COMM_LEN);
         timer->start_pid = current->pid;
+#endif
 }
+
+static inline void timer_stats_hrtimer_clear_start_info(struct hrtimer *timer)
+{
+#ifdef CONFIG_TIMER_STATS
+        timer->start_site = NULL;
+#endif
+}
+
+static inline void timer_stats_account_hrtimer(struct hrtimer *timer)
+{
+#ifdef CONFIG_TIMER_STATS
+        if (likely(!timer_stats_active))
+                return;
+        timer_stats_update_stats(timer, timer->start_pid, timer->start_site,
+                                 timer->function, timer->start_comm, 0);
 #endif
+}
 
 /*
  * Counterpart to lock_hrtimer_base above:
@@ -765,7 +790,7 @@ void __timer_stats_hrtimer_set_start_info(struct hrtimer *timer, void *addr)
 static inline
 void unlock_hrtimer_base(const struct hrtimer *timer, unsigned long *flags)
 {
-        spin_unlock_irqrestore(&timer->base->cpu_base->lock, *flags);
+        raw_spin_unlock_irqrestore(&timer->base->cpu_base->lock, *flags);
 }
 
 /**
@@ -1098,7 +1123,7 @@ ktime_t hrtimer_get_next_event(void)
         unsigned long flags;
         int i;
 
-        spin_lock_irqsave(&cpu_base->lock, flags);
+        raw_spin_lock_irqsave(&cpu_base->lock, flags);
 
         if (!hrtimer_hres_active()) {
                 for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++, base++) {
@@ -1115,7 +1140,7 @@ ktime_t hrtimer_get_next_event(void)
                 }
         }
 
-        spin_unlock_irqrestore(&cpu_base->lock, flags);
+        raw_spin_unlock_irqrestore(&cpu_base->lock, flags);
 
         if (mindelta.tv64 < 0)
                 mindelta.tv64 = 0;
@@ -1197,11 +1222,11 @@ static void __run_hrtimer(struct hrtimer *timer, ktime_t *now)
          * they get migrated to another cpu, therefore its safe to unlock
          * the timer base.
          */
-        spin_unlock(&cpu_base->lock);
+        raw_spin_unlock(&cpu_base->lock);
         trace_hrtimer_expire_entry(timer, now);
         restart = fn(timer);
         trace_hrtimer_expire_exit(timer);
-        spin_lock(&cpu_base->lock);
+        raw_spin_lock(&cpu_base->lock);
 
         /*
          * Note: We clear the CALLBACK bit after enqueue_hrtimer and
@@ -1217,29 +1242,6 @@ static void __run_hrtimer(struct hrtimer *timer, ktime_t *now)
 
 #ifdef CONFIG_HIGH_RES_TIMERS
 
-static int force_clock_reprogram;
-
-/*
- * After 5 iteration's attempts, we consider that hrtimer_interrupt()
- * is hanging, which could happen with something that slows the interrupt
- * such as the tracing. Then we force the clock reprogramming for each future
- * hrtimer interrupts to avoid infinite loops and use the min_delta_ns
- * threshold that we will overwrite.
- * The next tick event will be scheduled to 3 times we currently spend on
- * hrtimer_interrupt(). This gives a good compromise, the cpus will spend
- * 1/4 of their time to process the hrtimer interrupts. This is enough to
- * let it running without serious starvation.
- */
-
-static inline void
-hrtimer_interrupt_hanging(struct clock_event_device *dev,
-                        ktime_t try_time)
-{
-        force_clock_reprogram = 1;
-        dev->min_delta_ns = (unsigned long)try_time.tv64 * 3;
-        printk(KERN_WARNING "hrtimer: interrupt too slow, "
-                "forcing clock min delta to %lu ns\n", dev->min_delta_ns);
-}
 /*
  * High resolution timer interrupt
  * Called with interrupts disabled
@@ -1248,24 +1250,18 @@ void hrtimer_interrupt(struct clock_event_device *dev)
 {
         struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
         struct hrtimer_clock_base *base;
-        ktime_t expires_next, now;
-        int nr_retries = 0;
-        int i;
+        ktime_t expires_next, now, entry_time, delta;
+        int i, retries = 0;
 
         BUG_ON(!cpu_base->hres_active);
         cpu_base->nr_events++;
         dev->next_event.tv64 = KTIME_MAX;
 
- retry:
-        /* 5 retries is enough to notice a hang */
-        if (!(++nr_retries % 5))
-                hrtimer_interrupt_hanging(dev, ktime_sub(ktime_get(), now));
-
-        now = ktime_get();
-
+        entry_time = now = ktime_get();
+retry:
         expires_next.tv64 = KTIME_MAX;
 
-        spin_lock(&cpu_base->lock);
+        raw_spin_lock(&cpu_base->lock);
         /*
          * We set expires_next to KTIME_MAX here with cpu_base->lock
          * held to prevent that a timer is enqueued in our queue via
@@ -1321,13 +1317,51 @@ void hrtimer_interrupt(struct clock_event_device *dev)
          * against it.
          */
         cpu_base->expires_next = expires_next;
-        spin_unlock(&cpu_base->lock);
+        raw_spin_unlock(&cpu_base->lock);
 
         /* Reprogramming necessary ? */
-        if (expires_next.tv64 != KTIME_MAX) {
-                if (tick_program_event(expires_next, force_clock_reprogram))
-                        goto retry;
+        if (expires_next.tv64 == KTIME_MAX ||
+            !tick_program_event(expires_next, 0)) {
+                cpu_base->hang_detected = 0;
+                return;
         }
+
+        /*
+         * The next timer was already expired due to:
+         * - tracing
+         * - long lasting callbacks
+         * - being scheduled away when running in a VM
+         *
+         * We need to prevent that we loop forever in the hrtimer
+         * interrupt routine. We give it 3 attempts to avoid
+         * overreacting on some spurious event.
+         */
+        now = ktime_get();
+        cpu_base->nr_retries++;
+        if (++retries < 3)
+                goto retry;
+        /*
+         * Give the system a chance to do something else than looping
+         * here. We stored the entry time, so we know exactly how long
+         * we spent here. We schedule the next event this amount of
+         * time away.
+         */
+        cpu_base->nr_hangs++;
+        cpu_base->hang_detected = 1;
+        delta = ktime_sub(now, entry_time);
+        if (delta.tv64 > cpu_base->max_hang_time.tv64)
+                cpu_base->max_hang_time = delta;
+        /*
+         * Limit it to a sensible value as we enforce a longer
+         * delay. Give the CPU at least 100ms to catch up.
+         */
+        if (delta.tv64 > 100 * NSEC_PER_MSEC)
+                expires_next = ktime_add_ns(now, 100 * NSEC_PER_MSEC);
+        else
+                expires_next = ktime_add(now, delta);
+        tick_program_event(expires_next, 1);
+        printk_once(KERN_WARNING "hrtimer: interrupt took %llu ns\n",
+                    ktime_to_ns(delta));
 }
 
 /*
@@ -1423,7 +1457,7 @@ void hrtimer_run_queues(void)
                         gettime = 0;
                 }
 
-                spin_lock(&cpu_base->lock);
+                raw_spin_lock(&cpu_base->lock);
 
                 while ((node = base->first)) {
                         struct hrtimer *timer;
@@ -1435,7 +1469,7 @@ void hrtimer_run_queues(void)
 
                         __run_hrtimer(timer, &base->softirq_time);
                 }
-                spin_unlock(&cpu_base->lock);
+                raw_spin_unlock(&cpu_base->lock);
         }
 }
 
@@ -1591,7 +1625,7 @@ static void __cpuinit init_hrtimers_cpu(int cpu)
         struct hrtimer_cpu_base *cpu_base = &per_cpu(hrtimer_bases, cpu);
         int i;
 
-        spin_lock_init(&cpu_base->lock);
+        raw_spin_lock_init(&cpu_base->lock);
 
         for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++)
                 cpu_base->clock_base[i].cpu_base = cpu_base;
@@ -1649,16 +1683,16 @@ static void migrate_hrtimers(int scpu)
          * The caller is globally serialized and nobody else
          * takes two locks at once, deadlock is not possible.
          */
-        spin_lock(&new_base->lock);
-        spin_lock_nested(&old_base->lock, SINGLE_DEPTH_NESTING);
+        raw_spin_lock(&new_base->lock);
+        raw_spin_lock_nested(&old_base->lock, SINGLE_DEPTH_NESTING);
 
         for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
                 migrate_hrtimer_list(&old_base->clock_base[i],
                                      &new_base->clock_base[i]);
         }
 
-        spin_unlock(&old_base->lock);
-        spin_unlock(&new_base->lock);
+        raw_spin_unlock(&old_base->lock);
+        raw_spin_unlock(&new_base->lock);
 
         /* Check, if we got expired work to do */
         __hrtimer_peek_ahead_timers();
diff --git a/kernel/hung_task.c b/kernel/hung_task.c
index d4e841747400..0c642d51aac2 100644
--- a/kernel/hung_task.c
+++ b/kernel/hung_task.c
@@ -144,7 +144,7 @@ static void check_hung_uninterruptible_tasks(unsigned long timeout)
 
         rcu_read_lock();
         do_each_thread(g, t) {
-                if (!--max_count)
+                if (!max_count--)
                         goto unlock;
                 if (!--batch_count) {
                         batch_count = HUNG_TASK_BATCHING;
diff --git a/kernel/hw_breakpoint.c b/kernel/hw_breakpoint.c
new file mode 100644
index 000000000000..dbcbf6a33a08
--- /dev/null
+++ b/kernel/hw_breakpoint.c
@@ -0,0 +1,453 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) 2007 Alan Stern
+ * Copyright (C) IBM Corporation, 2009
+ * Copyright (C) 2009, Frederic Weisbecker <fweisbec@gmail.com>
+ *
+ * Thanks to Ingo Molnar for his many suggestions.
+ *
+ * Authors: Alan Stern <stern@rowland.harvard.edu>
+ *          K.Prasad <prasad@linux.vnet.ibm.com>
+ *          Frederic Weisbecker <fweisbec@gmail.com>
+ */
+
+/*
+ * HW_breakpoint: a unified kernel/user-space hardware breakpoint facility,
+ * using the CPU's debug registers.
+ * This file contains the arch-independent routines.
+ */
+
+#include <linux/irqflags.h>
+#include <linux/kallsyms.h>
+#include <linux/notifier.h>
+#include <linux/kprobes.h>
+#include <linux/kdebug.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/percpu.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+
+#include <linux/hw_breakpoint.h>
+
+/*
+ * Constraints data
+ */
+
+/* Number of pinned cpu breakpoints in a cpu */
+static DEFINE_PER_CPU(unsigned int, nr_cpu_bp_pinned);
+
+/* Number of pinned task breakpoints in a cpu */
+static DEFINE_PER_CPU(unsigned int, nr_task_bp_pinned[HBP_NUM]);
+
+/* Number of non-pinned cpu/task breakpoints in a cpu */
+static DEFINE_PER_CPU(unsigned int, nr_bp_flexible);
+
+/* Gather the number of total pinned and un-pinned bp in a cpuset */
+struct bp_busy_slots {
+        unsigned int pinned;
+        unsigned int flexible;
+};
+
+/* Serialize accesses to the above constraints */
+static DEFINE_MUTEX(nr_bp_mutex);
+
+/*
+ * Report the maximum number of pinned breakpoints a task
+ * have in this cpu
+ */
+static unsigned int max_task_bp_pinned(int cpu)
+{
+        int i;
+        unsigned int *tsk_pinned = per_cpu(nr_task_bp_pinned, cpu);
+
+        for (i = HBP_NUM -1; i >= 0; i--) {
+                if (tsk_pinned[i] > 0)
+                        return i + 1;
+        }
+
+        return 0;
+}
+
+static int task_bp_pinned(struct task_struct *tsk)
+{
+        struct perf_event_context *ctx = tsk->perf_event_ctxp;
+        struct list_head *list;
+        struct perf_event *bp;
+        unsigned long flags;
+        int count = 0;
+
+        if (WARN_ONCE(!ctx, "No perf context for this task"))
+                return 0;
+
+        list = &ctx->event_list;
+
+        raw_spin_lock_irqsave(&ctx->lock, flags);
+
+        /*
+         * The current breakpoint counter is not included in the list
+         * at the open() callback time
+         */
+        list_for_each_entry(bp, list, event_entry) {
+                if (bp->attr.type == PERF_TYPE_BREAKPOINT)
+                        count++;
+        }
+
+        raw_spin_unlock_irqrestore(&ctx->lock, flags);
+
+        return count;
+}
+
+/*
+ * Report the number of pinned/un-pinned breakpoints we have in
+ * a given cpu (cpu > -1) or in all of them (cpu = -1).
+ */
+static void
+fetch_bp_busy_slots(struct bp_busy_slots *slots, struct perf_event *bp)
+{
+        int cpu = bp->cpu;
+        struct task_struct *tsk = bp->ctx->task;
+
+        if (cpu >= 0) {
+                slots->pinned = per_cpu(nr_cpu_bp_pinned, cpu);
+                if (!tsk)
+                        slots->pinned += max_task_bp_pinned(cpu);
+                else
+                        slots->pinned += task_bp_pinned(tsk);
+                slots->flexible = per_cpu(nr_bp_flexible, cpu);
+
+                return;
+        }
+
+        for_each_online_cpu(cpu) {
+                unsigned int nr;
+
+                nr = per_cpu(nr_cpu_bp_pinned, cpu);
+                if (!tsk)
+                        nr += max_task_bp_pinned(cpu);
+                else
+                        nr += task_bp_pinned(tsk);
+
+                if (nr > slots->pinned)
+                        slots->pinned = nr;
+
+                nr = per_cpu(nr_bp_flexible, cpu);
+
+                if (nr > slots->flexible)
+                        slots->flexible = nr;
+        }
+}
+
+/*
+ * Add a pinned breakpoint for the given task in our constraint table
+ */
+static void toggle_bp_task_slot(struct task_struct *tsk, int cpu, bool enable)
+{
+        unsigned int *tsk_pinned;
+        int count = 0;
+
+        count = task_bp_pinned(tsk);
+
+        tsk_pinned = per_cpu(nr_task_bp_pinned, cpu);
+        if (enable) {
+                tsk_pinned[count]++;
+                if (count > 0)
+                        tsk_pinned[count-1]--;
+        } else {
+                tsk_pinned[count]--;
+                if (count > 0)
+                        tsk_pinned[count-1]++;
+        }
+}
+
+/*
+ * Add/remove the given breakpoint in our constraint table
+ */
+static void toggle_bp_slot(struct perf_event *bp, bool enable)
+{
+        int cpu = bp->cpu;
+        struct task_struct *tsk = bp->ctx->task;
+
+        /* Pinned counter task profiling */
+        if (tsk) {
+                if (cpu >= 0) {
+                        toggle_bp_task_slot(tsk, cpu, enable);
+                        return;
+                }
+
+                for_each_online_cpu(cpu)
+                        toggle_bp_task_slot(tsk, cpu, enable);
+                return;
+        }
+
+        /* Pinned counter cpu profiling */
+        if (enable)
+                per_cpu(nr_cpu_bp_pinned, bp->cpu)++;
+        else
+                per_cpu(nr_cpu_bp_pinned, bp->cpu)--;
+}
+
+/*
+ * Contraints to check before allowing this new breakpoint counter:
+ *
+ *  == Non-pinned counter == (Considered as pinned for now)
+ *
+ *   - If attached to a single cpu, check:
+ *
+ *       (per_cpu(nr_bp_flexible, cpu) || (per_cpu(nr_cpu_bp_pinned, cpu)
+ *           + max(per_cpu(nr_task_bp_pinned, cpu)))) < HBP_NUM
+ *
+ *       -> If there are already non-pinned counters in this cpu, it means
+ *          there is already a free slot for them.
+ *          Otherwise, we check that the maximum number of per task
+ *          breakpoints (for this cpu) plus the number of per cpu breakpoint
+ *          (for this cpu) doesn't cover every registers.
+ *
+ *   - If attached to every cpus, check:
+ *
+ *       (per_cpu(nr_bp_flexible, *) || (max(per_cpu(nr_cpu_bp_pinned, *))
+ *           + max(per_cpu(nr_task_bp_pinned, *)))) < HBP_NUM
+ *
+ *       -> This is roughly the same, except we check the number of per cpu
+ *          bp for every cpu and we keep the max one. Same for the per tasks
+ *          breakpoints.
+ *
+ *
+ * == Pinned counter ==
+ *
+ *   - If attached to a single cpu, check:
+ *
+ *       ((per_cpu(nr_bp_flexible, cpu) > 1) + per_cpu(nr_cpu_bp_pinned, cpu)
+ *            + max(per_cpu(nr_task_bp_pinned, cpu))) < HBP_NUM
+ *
+ *       -> Same checks as before. But now the nr_bp_flexible, if any, must keep
+ *          one register at least (or they will never be fed).
+ *
+ *   - If attached to every cpus, check:
+ *
+ *       ((per_cpu(nr_bp_flexible, *) > 1) + max(per_cpu(nr_cpu_bp_pinned, *))
+ *            + max(per_cpu(nr_task_bp_pinned, *))) < HBP_NUM
+ */
+int reserve_bp_slot(struct perf_event *bp)
+{
+        struct bp_busy_slots slots = {0};
+        int ret = 0;
+
+        mutex_lock(&nr_bp_mutex);
+
+        fetch_bp_busy_slots(&slots, bp);
+
+        /* Flexible counters need to keep at least one slot */
+        if (slots.pinned + (!!slots.flexible) == HBP_NUM) {
+                ret = -ENOSPC;
+                goto end;
+        }
+
+        toggle_bp_slot(bp, true);
+
+end:
+        mutex_unlock(&nr_bp_mutex);
+
+        return ret;
+}
+
+void release_bp_slot(struct perf_event *bp)
+{
+        mutex_lock(&nr_bp_mutex);
+
+        toggle_bp_slot(bp, false);
+
+        mutex_unlock(&nr_bp_mutex);
+}
+
+
+int register_perf_hw_breakpoint(struct perf_event *bp)
+{
+        int ret;
+
+        ret = reserve_bp_slot(bp);
+        if (ret)
+                return ret;
+
+        /*
+         * Ptrace breakpoints can be temporary perf events only
+         * meant to reserve a slot. In this case, it is created disabled and
+         * we don't want to check the params right now (as we put a null addr)
+         * But perf tools create events as disabled and we want to check
+         * the params for them.
+         * This is a quick hack that will be removed soon, once we remove
+         * the tmp breakpoints from ptrace
+         */
+        if (!bp->attr.disabled || !bp->overflow_handler)
+                ret = arch_validate_hwbkpt_settings(bp, bp->ctx->task);
+
+        return ret;
+}
+
+/**
+ * register_user_hw_breakpoint - register a hardware breakpoint for user space
+ * @attr: breakpoint attributes
+ * @triggered: callback to trigger when we hit the breakpoint
+ * @tsk: pointer to 'task_struct' of the process to which the address belongs
+ */
+struct perf_event *
+register_user_hw_breakpoint(struct perf_event_attr *attr,
+                            perf_overflow_handler_t triggered,
+                            struct task_struct *tsk)
+{
+        return perf_event_create_kernel_counter(attr, -1, tsk->pid, triggered);
+}
+EXPORT_SYMBOL_GPL(register_user_hw_breakpoint);
+
+/**
+ * modify_user_hw_breakpoint - modify a user-space hardware breakpoint
+ * @bp: the breakpoint structure to modify
+ * @attr: new breakpoint attributes
+ * @triggered: callback to trigger when we hit the breakpoint
+ * @tsk: pointer to 'task_struct' of the process to which the address belongs
+ */
+int modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr)
+{
+        u64 old_addr = bp->attr.bp_addr;
+        int old_type = bp->attr.bp_type;
+        int old_len = bp->attr.bp_len;
+        int err = 0;
+
+        perf_event_disable(bp);
+
+        bp->attr.bp_addr = attr->bp_addr;
+        bp->attr.bp_type = attr->bp_type;
+        bp->attr.bp_len = attr->bp_len;
+
+        if (attr->disabled)
+                goto end;
+
+        err = arch_validate_hwbkpt_settings(bp, bp->ctx->task);
+        if (!err)
+                perf_event_enable(bp);
+
+        if (err) {
+                bp->attr.bp_addr = old_addr;
+                bp->attr.bp_type = old_type;
+                bp->attr.bp_len = old_len;
+                if (!bp->attr.disabled)
+                        perf_event_enable(bp);
+
+                return err;
+        }
+
+end:
+        bp->attr.disabled = attr->disabled;
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(modify_user_hw_breakpoint);
+
+/**
+ * unregister_hw_breakpoint - unregister a user-space hardware breakpoint
+ * @bp: the breakpoint structure to unregister
+ */
+void unregister_hw_breakpoint(struct perf_event *bp)
+{
+        if (!bp)
+                return;
+        perf_event_release_kernel(bp);
+}
+EXPORT_SYMBOL_GPL(unregister_hw_breakpoint);
+
+/**
+ * register_wide_hw_breakpoint - register a wide breakpoint in the kernel
+ * @attr: breakpoint attributes
+ * @triggered: callback to trigger when we hit the breakpoint
+ *
+ * @return a set of per_cpu pointers to perf events
+ */
+struct perf_event **
+register_wide_hw_breakpoint(struct perf_event_attr *attr,
+                            perf_overflow_handler_t triggered)
+{
+        struct perf_event **cpu_events, **pevent, *bp;
+        long err;
+        int cpu;
+
+        cpu_events = alloc_percpu(typeof(*cpu_events));
+        if (!cpu_events)
+                return ERR_PTR(-ENOMEM);
+
+        for_each_possible_cpu(cpu) {
+                pevent = per_cpu_ptr(cpu_events, cpu);
+                bp = perf_event_create_kernel_counter(attr, cpu, -1, triggered);
+
+                *pevent = bp;
+
+                if (IS_ERR(bp)) {
+                        err = PTR_ERR(bp);
+                        goto fail;
+                }
+        }
+
+        return cpu_events;
+
+fail:
+        for_each_possible_cpu(cpu) {
+                pevent = per_cpu_ptr(cpu_events, cpu);
+                if (IS_ERR(*pevent))
+                        break;
+                unregister_hw_breakpoint(*pevent);
+        }
+        free_percpu(cpu_events);
+        /* return the error if any */
+        return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(register_wide_hw_breakpoint);
+
+/**
+ * unregister_wide_hw_breakpoint - unregister a wide breakpoint in the kernel
+ * @cpu_events: the per cpu set of events to unregister
+ */
+void unregister_wide_hw_breakpoint(struct perf_event **cpu_events)
+{
+        int cpu;
+        struct perf_event **pevent;
+
+        for_each_possible_cpu(cpu) {
+                pevent = per_cpu_ptr(cpu_events, cpu);
+                unregister_hw_breakpoint(*pevent);
+        }
+        free_percpu(cpu_events);
+}
+EXPORT_SYMBOL_GPL(unregister_wide_hw_breakpoint);
+
+static struct notifier_block hw_breakpoint_exceptions_nb = {
+        .notifier_call = hw_breakpoint_exceptions_notify,
+        /* we need to be notified first */
+        .priority = 0x7fffffff
+};
+
+static int __init init_hw_breakpoint(void)
+{
+        return register_die_notifier(&hw_breakpoint_exceptions_nb);
+}
+core_initcall(init_hw_breakpoint);
+
+
+struct pmu perf_ops_bp = {
+        .enable         = arch_install_hw_breakpoint,
+        .disable        = arch_uninstall_hw_breakpoint,
+        .read           = hw_breakpoint_pmu_read,
+        .unthrottle     = hw_breakpoint_pmu_unthrottle
+};
diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c
index 1de9700f416e..2295a31ef110 100644
--- a/kernel/irq/autoprobe.c
+++ b/kernel/irq/autoprobe.c
@@ -45,7 +45,7 @@ unsigned long probe_irq_on(void)
          * flush such a longstanding irq before considering it as spurious.
          */
         for_each_irq_desc_reverse(i, desc) {
-                spin_lock_irq(&desc->lock);
+                raw_spin_lock_irq(&desc->lock);
                 if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
                         /*
                          * An old-style architecture might still have
@@ -61,7 +61,7 @@ unsigned long probe_irq_on(void)
                                 desc->chip->set_type(i, IRQ_TYPE_PROBE);
                         desc->chip->startup(i);
                 }
-                spin_unlock_irq(&desc->lock);
+                raw_spin_unlock_irq(&desc->lock);
         }
 
         /* Wait for longstanding interrupts to trigger. */
@@ -73,13 +73,13 @@ unsigned long probe_irq_on(void)
          * happened in the previous stage, it may have masked itself)
          */
         for_each_irq_desc_reverse(i, desc) {
-                spin_lock_irq(&desc->lock);
+                raw_spin_lock_irq(&desc->lock);
                 if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
                         desc->status |= IRQ_AUTODETECT | IRQ_WAITING;
                         if (desc->chip->startup(i))
                                 desc->status |= IRQ_PENDING;
                 }
-                spin_unlock_irq(&desc->lock);
+                raw_spin_unlock_irq(&desc->lock);
         }
 
         /*
@@ -91,7 +91,7 @@ unsigned long probe_irq_on(void)
          * Now filter out any obviously spurious interrupts
          */
         for_each_irq_desc(i, desc) {
-                spin_lock_irq(&desc->lock);
+                raw_spin_lock_irq(&desc->lock);
                 status = desc->status;
 
                 if (status & IRQ_AUTODETECT) {
@@ -103,7 +103,7 @@ unsigned long probe_irq_on(void)
                                 if (i < 32)
                                         mask |= 1 << i;
                 }
-                spin_unlock_irq(&desc->lock);
+                raw_spin_unlock_irq(&desc->lock);
         }
 
         return mask;
@@ -129,7 +129,7 @@ unsigned int probe_irq_mask(unsigned long val)
         int i;
 
         for_each_irq_desc(i, desc) {
-                spin_lock_irq(&desc->lock);
+                raw_spin_lock_irq(&desc->lock);
                 status = desc->status;
 
                 if (status & IRQ_AUTODETECT) {
@@ -139,7 +139,7 @@ unsigned int probe_irq_mask(unsigned long val)
                         desc->status = status & ~IRQ_AUTODETECT;
                         desc->chip->shutdown(i);
                 }
-                spin_unlock_irq(&desc->lock);
+                raw_spin_unlock_irq(&desc->lock);
         }
         mutex_unlock(&probing_active);
 
@@ -171,7 +171,7 @@ int probe_irq_off(unsigned long val)
         unsigned int status;
 
         for_each_irq_desc(i, desc) {
-                spin_lock_irq(&desc->lock);
+                raw_spin_lock_irq(&desc->lock);
                 status = desc->status;
 
                 if (status & IRQ_AUTODETECT) {
@@ -183,7 +183,7 @@ int probe_irq_off(unsigned long val)
                         desc->status = status & ~IRQ_AUTODETECT;
                         desc->chip->shutdown(i);
                 }
-                spin_unlock_irq(&desc->lock);
+                raw_spin_unlock_irq(&desc->lock);
         }
         mutex_unlock(&probing_active);
 
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index c1660194d115..ecc3fa28f666 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -34,7 +34,7 @@ void dynamic_irq_init(unsigned int irq)
         }
 
         /* Ensure we don't have left over values from a previous use of this irq */
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
         desc->status = IRQ_DISABLED;
         desc->chip = &no_irq_chip;
         desc->handle_irq = handle_bad_irq;
@@ -51,7 +51,7 @@ void dynamic_irq_init(unsigned int irq)
         cpumask_clear(desc->pending_mask);
 #endif
 #endif
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
 }
 
 /**
@@ -68,9 +68,9 @@ void dynamic_irq_cleanup(unsigned int irq)
                 return;
         }
 
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
         if (desc->action) {
-                spin_unlock_irqrestore(&desc->lock, flags);
+                raw_spin_unlock_irqrestore(&desc->lock, flags);
                 WARN(1, KERN_ERR "Destroying IRQ%d without calling free_irq\n",
                         irq);
                 return;
@@ -82,7 +82,7 @@ void dynamic_irq_cleanup(unsigned int irq)
         desc->chip = &no_irq_chip;
         desc->name = NULL;
         clear_kstat_irqs(desc);
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
 }
 
 
@@ -104,10 +104,10 @@ int set_irq_chip(unsigned int irq, struct irq_chip *chip)
         if (!chip)
                 chip = &no_irq_chip;
 
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
         irq_chip_set_defaults(chip);
         desc->chip = chip;
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
 
         return 0;
 }
@@ -133,9 +133,9 @@ int set_irq_type(unsigned int irq, unsigned int type)
         if (type == IRQ_TYPE_NONE)
                 return 0;
 
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
         ret = __irq_set_trigger(desc, irq, type);
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
         return ret;
 }
 EXPORT_SYMBOL(set_irq_type);
@@ -158,19 +158,19 @@ int set_irq_data(unsigned int irq, void *data)
                 return -EINVAL;
         }
 
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
         desc->handler_data = data;
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
         return 0;
 }
 EXPORT_SYMBOL(set_irq_data);
 
 /**
- *      set_irq_data - set irq type data for an irq
+ *      set_irq_msi - set MSI descriptor data for an irq
  *      @irq:   Interrupt number
  *      @entry: Pointer to MSI descriptor data
  *
- *      Set the hardware irq controller data for an irq
+ *      Set the MSI descriptor entry for an irq
  */
 int set_irq_msi(unsigned int irq, struct msi_desc *entry)
 {
@@ -183,11 +183,11 @@ int set_irq_msi(unsigned int irq, struct msi_desc *entry)
                 return -EINVAL;
         }
 
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
         desc->msi_desc = entry;
         if (entry)
                 entry->irq = irq;
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
         return 0;
 }
 
@@ -214,9 +214,9 @@ int set_irq_chip_data(unsigned int irq, void *data)
                 return -EINVAL;
         }
 
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
         desc->chip_data = data;
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
 
         return 0;
 }
@@ -241,12 +241,12 @@ void set_irq_nested_thread(unsigned int irq, int nest)
         if (!desc)
                 return;
 
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
         if (nest)
                 desc->status |= IRQ_NESTED_THREAD;
         else
                 desc->status &= ~IRQ_NESTED_THREAD;
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
 }
 EXPORT_SYMBOL_GPL(set_irq_nested_thread);
 
@@ -343,7 +343,7 @@ void handle_nested_irq(unsigned int irq)
 
         might_sleep();
 
-        spin_lock_irq(&desc->lock);
+        raw_spin_lock_irq(&desc->lock);
 
         kstat_incr_irqs_this_cpu(irq, desc);
 
@@ -352,17 +352,17 @@ void handle_nested_irq(unsigned int irq)
                 goto out_unlock;
 
         desc->status |= IRQ_INPROGRESS;
-        spin_unlock_irq(&desc->lock);
+        raw_spin_unlock_irq(&desc->lock);
 
         action_ret = action->thread_fn(action->irq, action->dev_id);
         if (!noirqdebug)
                 note_interrupt(irq, desc, action_ret);
 
-        spin_lock_irq(&desc->lock);
+        raw_spin_lock_irq(&desc->lock);
         desc->status &= ~IRQ_INPROGRESS;
 
 out_unlock:
-        spin_unlock_irq(&desc->lock);
+        raw_spin_unlock_irq(&desc->lock);
 }
 EXPORT_SYMBOL_GPL(handle_nested_irq);
 
@@ -384,7 +384,7 @@ handle_simple_irq(unsigned int irq, struct irq_desc *desc)
         struct irqaction *action;
         irqreturn_t action_ret;
 
-        spin_lock(&desc->lock);
+        raw_spin_lock(&desc->lock);
 
         if (unlikely(desc->status & IRQ_INPROGRESS))
                 goto out_unlock;
@@ -396,16 +396,16 @@ handle_simple_irq(unsigned int irq, struct irq_desc *desc)
                 goto out_unlock;
 
         desc->status |= IRQ_INPROGRESS;
-        spin_unlock(&desc->lock);
+        raw_spin_unlock(&desc->lock);
 
         action_ret = handle_IRQ_event(irq, action);
         if (!noirqdebug)
                 note_interrupt(irq, desc, action_ret);
 
-        spin_lock(&desc->lock);
+        raw_spin_lock(&desc->lock);
         desc->status &= ~IRQ_INPROGRESS;
 out_unlock:
-        spin_unlock(&desc->lock);
+        raw_spin_unlock(&desc->lock);
 }
 
 /**
@@ -424,7 +424,7 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc)
         struct irqaction *action;
         irqreturn_t action_ret;
 
-        spin_lock(&desc->lock);
+        raw_spin_lock(&desc->lock);
         mask_ack_irq(desc, irq);
 
         if (unlikely(desc->status & IRQ_INPROGRESS))
@@ -441,13 +441,13 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc)
                 goto out_unlock;
 
         desc->status |= IRQ_INPROGRESS;
-        spin_unlock(&desc->lock);
+        raw_spin_unlock(&desc->lock);
 
         action_ret = handle_IRQ_event(irq, action);
         if (!noirqdebug)
                 note_interrupt(irq, desc, action_ret);
 
-        spin_lock(&desc->lock);
+        raw_spin_lock(&desc->lock);
         desc->status &= ~IRQ_INPROGRESS;
 
         if (unlikely(desc->status & IRQ_ONESHOT))
@@ -455,7 +455,7 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc)
         else if (!(desc->status & IRQ_DISABLED) && desc->chip->unmask)
                 desc->chip->unmask(irq);
 out_unlock:
-        spin_unlock(&desc->lock);
+        raw_spin_unlock(&desc->lock);
 }
 EXPORT_SYMBOL_GPL(handle_level_irq);
 
@@ -475,7 +475,7 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
         struct irqaction *action;
         irqreturn_t action_ret;
 
-        spin_lock(&desc->lock);
+        raw_spin_lock(&desc->lock);
 
         if (unlikely(desc->status & IRQ_INPROGRESS))
                 goto out;
@@ -497,18 +497,18 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
 
         desc->status |= IRQ_INPROGRESS;
         desc->status &= ~IRQ_PENDING;
-        spin_unlock(&desc->lock);
+        raw_spin_unlock(&desc->lock);
 
         action_ret = handle_IRQ_event(irq, action);
         if (!noirqdebug)
                 note_interrupt(irq, desc, action_ret);
 
-        spin_lock(&desc->lock);
+        raw_spin_lock(&desc->lock);
         desc->status &= ~IRQ_INPROGRESS;
 out:
         desc->chip->eoi(irq);
 
-        spin_unlock(&desc->lock);
+        raw_spin_unlock(&desc->lock);
 }
 
 /**
@@ -530,7 +530,7 @@ out:
 void
 handle_edge_irq(unsigned int irq, struct irq_desc *desc)
 {
-        spin_lock(&desc->lock);
+        raw_spin_lock(&desc->lock);
 
         desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
 
@@ -576,21 +576,21 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc)
                 }
 
                 desc->status &= ~IRQ_PENDING;
-                spin_unlock(&desc->lock);
+                raw_spin_unlock(&desc->lock);
                 action_ret = handle_IRQ_event(irq, action);
                 if (!noirqdebug)
                         note_interrupt(irq, desc, action_ret);
-                spin_lock(&desc->lock);
+                raw_spin_lock(&desc->lock);
 
         } while ((desc->status & (IRQ_PENDING | IRQ_DISABLED)) == IRQ_PENDING);
 
         desc->status &= ~IRQ_INPROGRESS;
 out_unlock:
-        spin_unlock(&desc->lock);
+        raw_spin_unlock(&desc->lock);
 }
 
 /**
- *      handle_percpu_IRQ - Per CPU local irq handler
+ *      handle_percpu_irq - Per CPU local irq handler
  *      @irq:   the interrupt number
  *      @desc:  the interrupt description structure for this irq
  *
@@ -643,7 +643,7 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
         }
 
         chip_bus_lock(irq, desc);
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
 
         /* Uninstall? */
         if (handle == handle_bad_irq) {
@@ -661,7 +661,7 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
                 desc->depth = 0;
                 desc->chip->startup(irq);
         }
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
         chip_bus_sync_unlock(irq, desc);
 }
 EXPORT_SYMBOL_GPL(__set_irq_handler);
@@ -692,9 +692,9 @@ void __init set_irq_noprobe(unsigned int irq)
                 return;
         }
 
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
         desc->status |= IRQ_NOPROBE;
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
 }
 
 void __init set_irq_probe(unsigned int irq)
@@ -707,7 +707,7 @@ void __init set_irq_probe(unsigned int irq)
                 return;
         }
 
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
         desc->status &= ~IRQ_NOPROBE;
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
 }
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 17c71bb565c6..814940e7f485 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -80,7 +80,7 @@ static struct irq_desc irq_desc_init = {
         .chip       = &no_irq_chip,
         .handle_irq = handle_bad_irq,
         .depth      = 1,
-        .lock       = __SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
+        .lock       = __RAW_SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
 };
 
 void __ref init_kstat_irqs(struct irq_desc *desc, int node, int nr)
@@ -108,7 +108,7 @@ static void init_one_irq_desc(int irq, struct irq_desc *desc, int node)
 {
         memcpy(desc, &irq_desc_init, sizeof(struct irq_desc));
 
-        spin_lock_init(&desc->lock);
+        raw_spin_lock_init(&desc->lock);
         desc->irq = irq;
 #ifdef CONFIG_SMP
         desc->node = node;
@@ -130,7 +130,7 @@ static void init_one_irq_desc(int irq, struct irq_desc *desc, int node)
 /*
  * Protect the sparse_irqs:
  */
-DEFINE_SPINLOCK(sparse_irq_lock);
+DEFINE_RAW_SPINLOCK(sparse_irq_lock);
 
 struct irq_desc **irq_desc_ptrs __read_mostly;
 
@@ -141,7 +141,7 @@ static struct irq_desc irq_desc_legacy[NR_IRQS_LEGACY] __cacheline_aligned_in_sm
                 .chip       = &no_irq_chip,
                 .handle_irq = handle_bad_irq,
                 .depth      = 1,
-                .lock       = __SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
+                .lock       = __RAW_SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
         }
 };
 
@@ -212,7 +212,7 @@ struct irq_desc * __ref irq_to_desc_alloc_node(unsigned int irq, int node)
         if (desc)
                 return desc;
 
-        spin_lock_irqsave(&sparse_irq_lock, flags);
+        raw_spin_lock_irqsave(&sparse_irq_lock, flags);
 
         /* We have to check it to avoid races with another CPU */
         desc = irq_desc_ptrs[irq];
@@ -234,7 +234,7 @@ struct irq_desc * __ref irq_to_desc_alloc_node(unsigned int irq, int node)
         irq_desc_ptrs[irq] = desc;
 
 out_unlock:
-        spin_unlock_irqrestore(&sparse_irq_lock, flags);
+        raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
 
         return desc;
 }
@@ -247,7 +247,7 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
                 .chip = &no_irq_chip,
                 .handle_irq = handle_bad_irq,
                 .depth = 1,
-                .lock = __SPIN_LOCK_UNLOCKED(irq_desc->lock),
+                .lock = __RAW_SPIN_LOCK_UNLOCKED(irq_desc->lock),
         }
 };
 
@@ -473,7 +473,7 @@ unsigned int __do_IRQ(unsigned int irq)
                 return 1;
         }
 
-        spin_lock(&desc->lock);
+        raw_spin_lock(&desc->lock);
         if (desc->chip->ack)
                 desc->chip->ack(irq);
         /*
@@ -517,13 +517,13 @@ unsigned int __do_IRQ(unsigned int irq)
         for (;;) {
                 irqreturn_t action_ret;
 
-                spin_unlock(&desc->lock);
+                raw_spin_unlock(&desc->lock);
 
                 action_ret = handle_IRQ_event(irq, action);
                 if (!noirqdebug)
                         note_interrupt(irq, desc, action_ret);
 
-                spin_lock(&desc->lock);
+                raw_spin_lock(&desc->lock);
                 if (likely(!(desc->status & IRQ_PENDING)))
                         break;
                 desc->status &= ~IRQ_PENDING;
@@ -536,7 +536,7 @@ out:
          * disabled while the handler was running.
          */
         desc->chip->end(irq);
-        spin_unlock(&desc->lock);
+        raw_spin_unlock(&desc->lock);
 
         return 1;
 }
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index 1b5d742c6a77..b2821f070a3d 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -18,7 +18,7 @@ extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
 extern struct lock_class_key irq_desc_lock_class;
 extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
 extern void clear_kstat_irqs(struct irq_desc *desc);
-extern spinlock_t sparse_irq_lock;
+extern raw_spinlock_t sparse_irq_lock;
 
 #ifdef CONFIG_SPARSE_IRQ
 /* irq_desc_ptrs allocated at boot time */
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index bde4c667d24d..eb6078ca60c7 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -46,9 +46,9 @@ void synchronize_irq(unsigned int irq)
                         cpu_relax();
 
                 /* Ok, that indicated we're done: double-check carefully. */
-                spin_lock_irqsave(&desc->lock, flags);
+                raw_spin_lock_irqsave(&desc->lock, flags);
                 status = desc->status;
-                spin_unlock_irqrestore(&desc->lock, flags);
+                raw_spin_unlock_irqrestore(&desc->lock, flags);
 
                 /* Oops, that failed? */
         } while (status & IRQ_INPROGRESS);
@@ -114,7 +114,7 @@ int irq_set_affinity(unsigned int irq, const struct cpumask *cpumask)
         if (!desc->chip->set_affinity)
                 return -EINVAL;
 
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
 
 #ifdef CONFIG_GENERIC_PENDING_IRQ
         if (desc->status & IRQ_MOVE_PCNTXT) {
@@ -134,7 +134,7 @@ int irq_set_affinity(unsigned int irq, const struct cpumask *cpumask)
         }
 #endif
         desc->status |= IRQ_AFFINITY_SET;
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
         return 0;
 }
 
@@ -181,11 +181,11 @@ int irq_select_affinity_usr(unsigned int irq)
         unsigned long flags;
         int ret;
 
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
         ret = setup_affinity(irq, desc);
         if (!ret)
                 irq_set_thread_affinity(desc);
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
 
         return ret;
 }
@@ -231,9 +231,9 @@ void disable_irq_nosync(unsigned int irq)
                 return;
 
         chip_bus_lock(irq, desc);
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
         __disable_irq(desc, irq, false);
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
         chip_bus_sync_unlock(irq, desc);
 }
 EXPORT_SYMBOL(disable_irq_nosync);
@@ -308,9 +308,9 @@ void enable_irq(unsigned int irq)
                 return;
 
         chip_bus_lock(irq, desc);
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
         __enable_irq(desc, irq, false);
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
         chip_bus_sync_unlock(irq, desc);
 }
 EXPORT_SYMBOL(enable_irq);
@@ -347,7 +347,7 @@ int set_irq_wake(unsigned int irq, unsigned int on)
         /* wakeup-capable irqs can be shared between drivers that
          * don't need to have the same sleep mode behaviors.
          */
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
         if (on) {
                 if (desc->wake_depth++ == 0) {
                         ret = set_irq_wake_real(irq, on);
@@ -368,7 +368,7 @@ int set_irq_wake(unsigned int irq, unsigned int on)
                 }
         }
 
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
         return ret;
 }
 EXPORT_SYMBOL(set_irq_wake);
@@ -484,12 +484,12 @@ static int irq_wait_for_interrupt(struct irqaction *action)
 static void irq_finalize_oneshot(unsigned int irq, struct irq_desc *desc)
 {
         chip_bus_lock(irq, desc);
-        spin_lock_irq(&desc->lock);
+        raw_spin_lock_irq(&desc->lock);
         if (!(desc->status & IRQ_DISABLED) && (desc->status & IRQ_MASKED)) {
                 desc->status &= ~IRQ_MASKED;
                 desc->chip->unmask(irq);
         }
-        spin_unlock_irq(&desc->lock);
+        raw_spin_unlock_irq(&desc->lock);
         chip_bus_sync_unlock(irq, desc);
 }
 
@@ -514,9 +514,9 @@ irq_thread_check_affinity(struct irq_desc *desc, struct irqaction *action)
                 return;
         }
 
-        spin_lock_irq(&desc->lock);
+        raw_spin_lock_irq(&desc->lock);
         cpumask_copy(mask, desc->affinity);
-        spin_unlock_irq(&desc->lock);
+        raw_spin_unlock_irq(&desc->lock);
 
         set_cpus_allowed_ptr(current, mask);
         free_cpumask_var(mask);
@@ -545,7 +545,7 @@ static int irq_thread(void *data)
 
                 atomic_inc(&desc->threads_active);
 
-                spin_lock_irq(&desc->lock);
+                raw_spin_lock_irq(&desc->lock);
                 if (unlikely(desc->status & IRQ_DISABLED)) {
                         /*
                          * CHECKME: We might need a dedicated
@@ -555,9 +555,9 @@ static int irq_thread(void *data)
                          * retriggers the interrupt itself --- tglx
                          */
                         desc->status |= IRQ_PENDING;
-                        spin_unlock_irq(&desc->lock);
+                        raw_spin_unlock_irq(&desc->lock);
                 } else {
-                        spin_unlock_irq(&desc->lock);
+                        raw_spin_unlock_irq(&desc->lock);
 
                         action->thread_fn(action->irq, action->dev_id);
 
@@ -679,7 +679,7 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
         /*
          * The following block of code has to be executed atomically
          */
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
         old_ptr = &desc->action;
         old = *old_ptr;
         if (old) {
@@ -775,7 +775,7 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
                 __enable_irq(desc, irq, false);
         }
 
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
 
         /*
          * Strictly no need to wake it up, but hung_task complains
@@ -802,7 +802,7 @@ mismatch:
         ret = -EBUSY;
 
 out_thread:
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
         if (new->thread) {
                 struct task_struct *t = new->thread;
 
@@ -844,7 +844,7 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id)
         if (!desc)
                 return NULL;
 
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
 
         /*
          * There can be multiple actions per IRQ descriptor, find the right
@@ -856,7 +856,7 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id)
 
                 if (!action) {
                         WARN(1, "Trying to free already-free IRQ %d\n", irq);
-                        spin_unlock_irqrestore(&desc->lock, flags);
+                        raw_spin_unlock_irqrestore(&desc->lock, flags);
 
                         return NULL;
                 }
@@ -884,7 +884,7 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id)
                         desc->chip->disable(irq);
         }
 
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
 
         unregister_handler_proc(irq, action);
 
@@ -1067,7 +1067,7 @@ int request_threaded_irq(unsigned int irq, irq_handler_t handler,
                 kfree(action);
 
 #ifdef CONFIG_DEBUG_SHIRQ
-        if (irqflags & IRQF_SHARED) {
+        if (!retval && (irqflags & IRQF_SHARED)) {
                 /*
                  * It's a shared IRQ -- the driver ought to be prepared for it
                  * to happen immediately, so let's make sure....
diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c
index fcb6c96f2627..241962280836 100644
--- a/kernel/irq/migration.c
+++ b/kernel/irq/migration.c
@@ -27,7 +27,7 @@ void move_masked_irq(int irq)
         if (!desc->chip->set_affinity)
                 return;
 
-        assert_spin_locked(&desc->lock);
+        assert_raw_spin_locked(&desc->lock);
 
         /*
          * If there was a valid mask to work with, please
diff --git a/kernel/irq/numa_migrate.c b/kernel/irq/numa_migrate.c
index 3fd30197da2e..26bac9d8f860 100644
--- a/kernel/irq/numa_migrate.c
+++ b/kernel/irq/numa_migrate.c
@@ -42,7 +42,7 @@ static bool init_copy_one_irq_desc(int irq, struct irq_desc *old_desc,
                                 "for migration.\n", irq);
                 return false;
         }
-        spin_lock_init(&desc->lock);
+        raw_spin_lock_init(&desc->lock);
         desc->node = node;
         lockdep_set_class(&desc->lock, &irq_desc_lock_class);
         init_copy_kstat_irqs(old_desc, desc, node, nr_cpu_ids);
@@ -67,7 +67,7 @@ static struct irq_desc *__real_move_irq_desc(struct irq_desc *old_desc,
 
         irq = old_desc->irq;
 
-        spin_lock_irqsave(&sparse_irq_lock, flags);
+        raw_spin_lock_irqsave(&sparse_irq_lock, flags);
 
         /* We have to check it to avoid races with another CPU */
         desc = irq_desc_ptrs[irq];
@@ -91,7 +91,7 @@ static struct irq_desc *__real_move_irq_desc(struct irq_desc *old_desc,
         }
 
         irq_desc_ptrs[irq] = desc;
-        spin_unlock_irqrestore(&sparse_irq_lock, flags);
+        raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
 
         /* free the old one */
         free_one_irq_desc(old_desc, desc);
@@ -100,7 +100,7 @@ static struct irq_desc *__real_move_irq_desc(struct irq_desc *old_desc,
         return desc;
 
 out_unlock:
-        spin_unlock_irqrestore(&sparse_irq_lock, flags);
+        raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
 
         return desc;
 }
diff --git a/kernel/irq/pm.c b/kernel/irq/pm.c
index a0bb09e79867..0d4005d85b03 100644
--- a/kernel/irq/pm.c
+++ b/kernel/irq/pm.c
@@ -28,9 +28,9 @@ void suspend_device_irqs(void)
         for_each_irq_desc(irq, desc) {
                 unsigned long flags;
 
-                spin_lock_irqsave(&desc->lock, flags);
+                raw_spin_lock_irqsave(&desc->lock, flags);
                 __disable_irq(desc, irq, true);
-                spin_unlock_irqrestore(&desc->lock, flags);
+                raw_spin_unlock_irqrestore(&desc->lock, flags);
         }
 
         for_each_irq_desc(irq, desc)
@@ -56,9 +56,9 @@ void resume_device_irqs(void)
                 if (!(desc->status & IRQ_SUSPENDED))
                         continue;
 
-                spin_lock_irqsave(&desc->lock, flags);
+                raw_spin_lock_irqsave(&desc->lock, flags);
                 __enable_irq(desc, irq, true);
-                spin_unlock_irqrestore(&desc->lock, flags);
+                raw_spin_unlock_irqrestore(&desc->lock, flags);
         }
 }
 EXPORT_SYMBOL_GPL(resume_device_irqs);
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 692363dd591f..6f50eccc79c0 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -136,7 +136,7 @@ out:
 
 static int default_affinity_open(struct inode *inode, struct file *file)
 {
-        return single_open(file, default_affinity_show, NULL);
+        return single_open(file, default_affinity_show, PDE(inode)->data);
 }
 
 static const struct file_operations default_affinity_proc_fops = {
@@ -148,18 +148,28 @@ static const struct file_operations default_affinity_proc_fops = {
 };
 #endif
 
-static int irq_spurious_read(char *page, char **start, off_t off,
-                                  int count, int *eof, void *data)
+static int irq_spurious_proc_show(struct seq_file *m, void *v)
 {
-        struct irq_desc *desc = irq_to_desc((long) data);
-        return sprintf(page, "count %u\n"
-                             "unhandled %u\n"
-                             "last_unhandled %u ms\n",
-                        desc->irq_count,
-                        desc->irqs_unhandled,
-                        jiffies_to_msecs(desc->last_unhandled));
+        struct irq_desc *desc = irq_to_desc((long) m->private);
+
+        seq_printf(m, "count %u\n" "unhandled %u\n" "last_unhandled %u ms\n",
+                   desc->irq_count, desc->irqs_unhandled,
+                   jiffies_to_msecs(desc->last_unhandled));
+        return 0;
+}
+
+static int irq_spurious_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, irq_spurious_proc_show, NULL);
 }
 
+static const struct file_operations irq_spurious_proc_fops = {
+        .open           = irq_spurious_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
 #define MAX_NAMELEN 128
 
 static int name_unique(unsigned int irq, struct irqaction *new_action)
@@ -169,7 +179,7 @@ static int name_unique(unsigned int irq, struct irqaction *new_action)
         unsigned long flags;
         int ret = 1;
 
-        spin_lock_irqsave(&desc->lock, flags);
+        raw_spin_lock_irqsave(&desc->lock, flags);
         for (action = desc->action ; action; action = action->next) {
                 if ((action != new_action) && action->name &&
                                 !strcmp(new_action->name, action->name)) {
@@ -177,7 +187,7 @@ static int name_unique(unsigned int irq, struct irqaction *new_action)
                         break;
                 }
         }
-        spin_unlock_irqrestore(&desc->lock, flags);
+        raw_spin_unlock_irqrestore(&desc->lock, flags);
         return ret;
 }
 
@@ -204,7 +214,6 @@ void register_handler_proc(unsigned int irq, struct irqaction *action)
 void register_irq_proc(unsigned int irq, struct irq_desc *desc)
 {
         char name [MAX_NAMELEN];
-        struct proc_dir_entry *entry;
 
         if (!root_irq_dir || (desc->chip == &no_irq_chip) || desc->dir)
                 return;
@@ -214,6 +223,8 @@ void register_irq_proc(unsigned int irq, struct irq_desc *desc)
 
         /* create /proc/irq/1234 */
         desc->dir = proc_mkdir(name, root_irq_dir);
+        if (!desc->dir)
+                return;
 
 #ifdef CONFIG_SMP
         /* create /proc/irq/<irq>/smp_affinity */
@@ -221,11 +232,8 @@ void register_irq_proc(unsigned int irq, struct irq_desc *desc)
                          &irq_affinity_proc_fops, (void *)(long)irq);
 #endif
 
-        entry = create_proc_entry("spurious", 0444, desc->dir);
-        if (entry) {
-                entry->data = (void *)(long)irq;
-                entry->read_proc = irq_spurious_read;
-        }
+        proc_create_data("spurious", 0444, desc->dir,
+                         &irq_spurious_proc_fops, (void *)(long)irq);
 }
 
 #undef MAX_NAMELEN
diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index bd7273e6282e..89fb90ae534f 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -28,7 +28,7 @@ static int try_one_irq(int irq, struct irq_desc *desc)
         struct irqaction *action;
         int ok = 0, work = 0;
 
-        spin_lock(&desc->lock);
+        raw_spin_lock(&desc->lock);
         /* Already running on another processor */
         if (desc->status & IRQ_INPROGRESS) {
                 /*
@@ -37,13 +37,13 @@ static int try_one_irq(int irq, struct irq_desc *desc)
                  */
                 if (desc->action && (desc->action->flags & IRQF_SHARED))
                         desc->status |= IRQ_PENDING;
-                spin_unlock(&desc->lock);
+                raw_spin_unlock(&desc->lock);
                 return ok;
         }
         /* Honour the normal IRQ locking */
         desc->status |= IRQ_INPROGRESS;
         action = desc->action;
-        spin_unlock(&desc->lock);
+        raw_spin_unlock(&desc->lock);
 
         while (action) {
                 /* Only shared IRQ handlers are safe to call */
@@ -56,7 +56,7 @@ static int try_one_irq(int irq, struct irq_desc *desc)
         }
         local_irq_disable();
         /* Now clean up the flags */
-        spin_lock(&desc->lock);
+        raw_spin_lock(&desc->lock);
         action = desc->action;
 
         /*
@@ -68,9 +68,9 @@ static int try_one_irq(int irq, struct irq_desc *desc)
                  * Perform real IRQ processing for the IRQ we deferred
                  */
                 work = 1;
-                spin_unlock(&desc->lock);
+                raw_spin_unlock(&desc->lock);
                 handle_IRQ_event(irq, action);
-                spin_lock(&desc->lock);
+                raw_spin_lock(&desc->lock);
                 desc->status &= ~IRQ_PENDING;
         }
         desc->status &= ~IRQ_INPROGRESS;
@@ -80,7 +80,7 @@ static int try_one_irq(int irq, struct irq_desc *desc)
          */
         if (work && desc->chip && desc->chip->end)
                 desc->chip->end(irq);
-        spin_unlock(&desc->lock);
+        raw_spin_unlock(&desc->lock);
 
         return ok;
 }
@@ -104,7 +104,7 @@ static int misrouted_irq(int irq)
         return ok;
 }
 
-static void poll_all_shared_irqs(void)
+static void poll_spurious_irqs(unsigned long dummy)
 {
         struct irq_desc *desc;
         int i;
@@ -125,23 +125,11 @@ static void poll_all_shared_irqs(void)
                 try_one_irq(i, desc);
                 local_irq_enable();
         }
-}
-
-static void poll_spurious_irqs(unsigned long dummy)
-{
-        poll_all_shared_irqs();
 
         mod_timer(&poll_spurious_irq_timer,
                   jiffies + POLL_SPURIOUS_IRQ_INTERVAL);
 }
 
-#ifdef CONFIG_DEBUG_SHIRQ
-void debug_poll_all_shared_irqs(void)
-{
-        poll_all_shared_irqs();
-}
-#endif
-
 /*
  * If 99,900 of the previous 100,000 interrupts have not been handled
  * then assume that the IRQ is stuck in some manner. Drop a diagnostic
@@ -232,7 +220,7 @@ void note_interrupt(unsigned int irq, struct irq_desc *desc,
                 /*
                  * If we are seeing only the odd spurious IRQ caused by
                  * bus asynchronicity then don't eventually trigger an error,
-                 * otherwise the couter becomes a doomsday timer for otherwise
+                 * otherwise the counter becomes a doomsday timer for otherwise
                  * working systems
                  */
                 if (time_after(jiffies, desc->last_unhandled + HZ/10))
diff --git a/kernel/itimer.c b/kernel/itimer.c
index b03451ede528..d802883153da 100644
--- a/kernel/itimer.c
+++ b/kernel/itimer.c
@@ -146,6 +146,7 @@ static void set_cpu_itimer(struct task_struct *tsk, unsigned int clock_id,
 {
         cputime_t cval, nval, cinterval, ninterval;
         s64 ns_ninterval, ns_nval;
+        u32 error, incr_error;
         struct cpu_itimer *it = &tsk->signal->it[clock_id];
 
         nval = timeval_to_cputime(&value->it_value);
@@ -153,8 +154,8 @@ static void set_cpu_itimer(struct task_struct *tsk, unsigned int clock_id,
         ninterval = timeval_to_cputime(&value->it_interval);
         ns_ninterval = timeval_to_ns(&value->it_interval);
 
-        it->incr_error = cputime_sub_ns(ninterval, ns_ninterval);
-        it->error = cputime_sub_ns(nval, ns_nval);
+        error = cputime_sub_ns(nval, ns_nval);
+        incr_error = cputime_sub_ns(ninterval, ns_ninterval);
 
         spin_lock_irq(&tsk->sighand->siglock);
 
@@ -168,6 +169,8 @@ static void set_cpu_itimer(struct task_struct *tsk, unsigned int clock_id,
         }
         it->expires = nval;
         it->incr = ninterval;
+        it->error = error;
+        it->incr_error = incr_error;
         trace_itimer_state(clock_id == CPUCLOCK_VIRT ?
                            ITIMER_VIRTUAL : ITIMER_PROF, value, nval);
 
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index 8b6b8b697c68..8e5288a8a355 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -181,6 +181,7 @@ unsigned long kallsyms_lookup_name(const char *name)
         }
         return module_kallsyms_lookup_name(name);
 }
+EXPORT_SYMBOL_GPL(kallsyms_lookup_name);
 
 int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *,
                                       unsigned long),
diff --git a/kernel/kexec.c b/kernel/kexec.c
index f336e2107f98..433e9fcc1fc5 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -31,6 +31,7 @@
 #include <linux/cpu.h>
 #include <linux/console.h>
 #include <linux/vmalloc.h>
+#include <linux/swap.h>
 
 #include <asm/page.h>
 #include <asm/uaccess.h>
@@ -1082,6 +1083,64 @@ void crash_kexec(struct pt_regs *regs)
         }
 }
 
+size_t crash_get_memory_size(void)
+{
+        size_t size;
+        mutex_lock(&kexec_mutex);
+        size = crashk_res.end - crashk_res.start + 1;
+        mutex_unlock(&kexec_mutex);
+        return size;
+}
+
+static void free_reserved_phys_range(unsigned long begin, unsigned long end)
+{
+        unsigned long addr;
+
+        for (addr = begin; addr < end; addr += PAGE_SIZE) {
+                ClearPageReserved(pfn_to_page(addr >> PAGE_SHIFT));
+                init_page_count(pfn_to_page(addr >> PAGE_SHIFT));
+                free_page((unsigned long)__va(addr));
+                totalram_pages++;
+        }
+}
+
+int crash_shrink_memory(unsigned long new_size)
+{
+        int ret = 0;
+        unsigned long start, end;
+
+        mutex_lock(&kexec_mutex);
+
+        if (kexec_crash_image) {
+                ret = -ENOENT;
+                goto unlock;
+        }
+        start = crashk_res.start;
+        end = crashk_res.end;
+
+        if (new_size >= end - start + 1) {
+                ret = -EINVAL;
+                if (new_size == end - start + 1)
+                        ret = 0;
+                goto unlock;
+        }
+
+        start = roundup(start, PAGE_SIZE);
+        end = roundup(start + new_size, PAGE_SIZE);
+
+        free_reserved_phys_range(end, crashk_res.end);
+
+        if (start == end) {
+                crashk_res.end = end;
+                release_resource(&crashk_res);
+        } else
+                crashk_res.end = end - 1;
+
+unlock:
+        mutex_unlock(&kexec_mutex);
+        return ret;
+}
+
 static u32 *append_elf_note(u32 *buf, char *name, unsigned type, void *data,
                             size_t data_len)
 {
diff --git a/kernel/kgdb.c b/kernel/kgdb.c
index 9147a3190c9d..2eb517e23514 100644
--- a/kernel/kgdb.c
+++ b/kernel/kgdb.c
@@ -129,6 +129,7 @@ struct task_struct		*kgdb_usethread;
 struct task_struct              *kgdb_contthread;
 
 int                             kgdb_single_step;
+pid_t                           kgdb_sstep_pid;
 
 /* Our I/O buffers. */
 static char                     remcom_in_buffer[BUFMAX];
@@ -541,12 +542,17 @@ static struct task_struct *getthread(struct pt_regs *regs, int tid)
          */
         if (tid == 0 || tid == -1)
                 tid = -atomic_read(&kgdb_active) - 2;
-        if (tid < 0) {
+        if (tid < -1 && tid > -NR_CPUS - 2) {
                 if (kgdb_info[-tid - 2].task)
                         return kgdb_info[-tid - 2].task;
                 else
                         return idle_task(-tid - 2);
         }
+        if (tid <= 0) {
+                printk(KERN_ERR "KGDB: Internal thread select error\n");
+                dump_stack();
+                return NULL;
+        }
 
         /*
          * find_task_by_pid_ns() does not take the tasklist lock anymore
@@ -619,7 +625,8 @@ static void kgdb_flush_swbreak_addr(unsigned long addr)
 static int kgdb_activate_sw_breakpoints(void)
 {
         unsigned long addr;
-        int error = 0;
+        int error;
+        int ret = 0;
         int i;
 
         for (i = 0; i < KGDB_MAX_BREAKPOINTS; i++) {
@@ -629,13 +636,16 @@ static int kgdb_activate_sw_breakpoints(void)
                 addr = kgdb_break[i].bpt_addr;
                 error = kgdb_arch_set_breakpoint(addr,
                                 kgdb_break[i].saved_instr);
-                if (error)
-                        return error;
+                if (error) {
+                        ret = error;
+                        printk(KERN_INFO "KGDB: BP install failed: %lx", addr);
+                        continue;
+                }
 
                 kgdb_flush_swbreak_addr(addr);
                 kgdb_break[i].state = BP_ACTIVE;
         }
-        return 0;
+        return ret;
 }
 
 static int kgdb_set_sw_break(unsigned long addr)
@@ -682,7 +692,8 @@ static int kgdb_set_sw_break(unsigned long addr)
 static int kgdb_deactivate_sw_breakpoints(void)
 {
         unsigned long addr;
-        int error = 0;
+        int error;
+        int ret = 0;
         int i;
 
         for (i = 0; i < KGDB_MAX_BREAKPOINTS; i++) {
@@ -691,13 +702,15 @@ static int kgdb_deactivate_sw_breakpoints(void)
                 addr = kgdb_break[i].bpt_addr;
                 error = kgdb_arch_remove_breakpoint(addr,
                                         kgdb_break[i].saved_instr);
-                if (error)
-                        return error;
+                if (error) {
+                        printk(KERN_INFO "KGDB: BP remove failed: %lx\n", addr);
+                        ret = error;
+                }
 
                 kgdb_flush_swbreak_addr(addr);
                 kgdb_break[i].state = BP_SET;
         }
-        return 0;
+        return ret;
 }
 
 static int kgdb_remove_sw_break(unsigned long addr)
@@ -870,7 +883,7 @@ static void gdb_cmd_getregs(struct kgdb_state *ks)
 
         /*
          * All threads that don't have debuggerinfo should be
-         * in __schedule() sleeping, since all other CPUs
+         * in schedule() sleeping, since all other CPUs
          * are in kgdb_wait, and thus have debuggerinfo.
          */
         if (local_debuggerinfo) {
@@ -1204,8 +1217,10 @@ static int gdb_cmd_exception_pass(struct kgdb_state *ks)
                 return 1;
 
         } else {
-                error_packet(remcom_out_buffer, -EINVAL);
-                return 0;
+                kgdb_msg_write("KGDB only knows signal 9 (pass)"
+                        " and 15 (pass and disconnect)\n"
+                        "Executing a continue without signal passing\n", 0);
+                remcom_in_buffer[0] = 'c';
         }
 
         /* Indicate fall through */
@@ -1395,6 +1410,7 @@ kgdb_handle_exception(int evector, int signo, int ecode, struct pt_regs *regs)
         struct kgdb_state kgdb_var;
         struct kgdb_state *ks = &kgdb_var;
         unsigned long flags;
+        int sstep_tries = 100;
         int error = 0;
         int i, cpu;
 
@@ -1425,13 +1441,14 @@ acquirelock:
                 cpu_relax();
 
         /*
-         * Do not start the debugger connection on this CPU if the last
-         * instance of the exception handler wanted to come into the
-         * debugger on a different CPU via a single step
+         * For single stepping, try to only enter on the processor
+         * that was single stepping.  To gaurd against a deadlock, the
+         * kernel will only try for the value of sstep_tries before
+         * giving up and continuing on.
          */
         if (atomic_read(&kgdb_cpu_doing_single_step) != -1 &&
-            atomic_read(&kgdb_cpu_doing_single_step) != cpu) {
-
+            (kgdb_info[cpu].task &&
+             kgdb_info[cpu].task->pid != kgdb_sstep_pid) && --sstep_tries) {
                 atomic_set(&kgdb_active, -1);
                 touch_softlockup_watchdog();
                 clocksource_touch_watchdog();
@@ -1524,6 +1541,13 @@ acquirelock:
         }
 
 kgdb_restore:
+        if (atomic_read(&kgdb_cpu_doing_single_step) != -1) {
+                int sstep_cpu = atomic_read(&kgdb_cpu_doing_single_step);
+                if (kgdb_info[sstep_cpu].task)
+                        kgdb_sstep_pid = kgdb_info[sstep_cpu].task->pid;
+                else
+                        kgdb_sstep_pid = 0;
+        }
         /* Free kgdb_active */
         atomic_set(&kgdb_active, -1);
         touch_softlockup_watchdog();
diff --git a/kernel/kmod.c b/kernel/kmod.c
index 9fcb53a11f87..25b103190364 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -80,16 +80,16 @@ int __request_module(bool wait, const char *fmt, ...)
 #define MAX_KMOD_CONCURRENT 50  /* Completely arbitrary value - KAO */
         static int kmod_loop_msg;
 
-        ret = security_kernel_module_request();
-        if (ret)
-                return ret;
-
         va_start(args, fmt);
         ret = vsnprintf(module_name, MODULE_NAME_LEN, fmt, args);
         va_end(args);
         if (ret >= MODULE_NAME_LEN)
                 return -ENAMETOOLONG;
 
+        ret = security_kernel_module_request(module_name);
+        if (ret)
+                return ret;
+
         /* If modprobe needs a service that is in a module, we get a recursive
          * loop.  Limit the number of running kmod threads to max_threads/2 or
          * MAX_KMOD_CONCURRENT, whichever is the smaller.  A cleaner method
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 5240d75f4c60..e5342a344c43 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -90,6 +90,9 @@ static spinlock_t *kretprobe_table_lock_ptr(unsigned long hash)
  */
 static struct kprobe_blackpoint kprobe_blacklist[] = {
         {"preempt_schedule",},
+        {"native_get_debugreg",},
+        {"irq_entries_start",},
+        {"common_interrupt",},
         {NULL}    /* Terminator */
 };
 
@@ -673,6 +676,40 @@ static kprobe_opcode_t __kprobes *kprobe_addr(struct kprobe *p)
         return (kprobe_opcode_t *)(((char *)addr) + p->offset);
 }
 
+/* Check passed kprobe is valid and return kprobe in kprobe_table. */
+static struct kprobe * __kprobes __get_valid_kprobe(struct kprobe *p)
+{
+        struct kprobe *old_p, *list_p;
+
+        old_p = get_kprobe(p->addr);
+        if (unlikely(!old_p))
+                return NULL;
+
+        if (p != old_p) {
+                list_for_each_entry_rcu(list_p, &old_p->list, list)
+                        if (list_p == p)
+                        /* kprobe p is a valid probe */
+                                goto valid;
+                return NULL;
+        }
+valid:
+        return old_p;
+}
+
+/* Return error if the kprobe is being re-registered */
+static inline int check_kprobe_rereg(struct kprobe *p)
+{
+        int ret = 0;
+        struct kprobe *old_p;
+
+        mutex_lock(&kprobe_mutex);
+        old_p = __get_valid_kprobe(p);
+        if (old_p)
+                ret = -EINVAL;
+        mutex_unlock(&kprobe_mutex);
+        return ret;
+}
+
 int __kprobes register_kprobe(struct kprobe *p)
 {
         int ret = 0;
@@ -685,6 +722,10 @@ int __kprobes register_kprobe(struct kprobe *p)
                 return -EINVAL;
         p->addr = addr;
 
+        ret = check_kprobe_rereg(p);
+        if (ret)
+                return ret;
+
         preempt_disable();
         if (!kernel_text_address((unsigned long) p->addr) ||
             in_kprobes_functions((unsigned long) p->addr)) {
@@ -754,26 +795,6 @@ out:
 }
 EXPORT_SYMBOL_GPL(register_kprobe);
 
-/* Check passed kprobe is valid and return kprobe in kprobe_table. */
-static struct kprobe * __kprobes __get_valid_kprobe(struct kprobe *p)
-{
-        struct kprobe *old_p, *list_p;
-
-        old_p = get_kprobe(p->addr);
-        if (unlikely(!old_p))
-                return NULL;
-
-        if (p != old_p) {
-                list_for_each_entry_rcu(list_p, &old_p->list, list)
-                        if (list_p == p)
-                        /* kprobe p is a valid probe */
-                                goto valid;
-                return NULL;
-        }
-valid:
-        return old_p;
-}
-
 /*
  * Unregister a kprobe without a scheduler synchronization.
  */
@@ -1014,9 +1035,9 @@ int __kprobes register_kretprobe(struct kretprobe *rp)
         /* Pre-allocate memory for max kretprobe instances */
         if (rp->maxactive <= 0) {
 #ifdef CONFIG_PREEMPT
-                rp->maxactive = max(10, 2 * NR_CPUS);
+                rp->maxactive = max(10, 2 * num_possible_cpus());
 #else
-                rp->maxactive = NR_CPUS;
+                rp->maxactive = num_possible_cpus();
 #endif
         }
         spin_lock_init(&rp->lock);
@@ -1141,6 +1162,13 @@ static void __kprobes kill_kprobe(struct kprobe *p)
         arch_remove_kprobe(p);
 }
 
+void __kprobes dump_kprobe(struct kprobe *kp)
+{
+        printk(KERN_WARNING "Dumping kprobe:\n");
+        printk(KERN_WARNING "Name: %s\nAddress: %p\nOffset: %x\n",
+               kp->symbol_name, kp->addr, kp->offset);
+}
+
 /* Module notifier call back, checking kprobes on the module */
 static int __kprobes kprobes_module_callback(struct notifier_block *nb,
                                              unsigned long val, void *data)
diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c
index 528dd78e7e7e..3feaf5a74514 100644
--- a/kernel/ksysfs.c
+++ b/kernel/ksysfs.c
@@ -100,6 +100,26 @@ static ssize_t kexec_crash_loaded_show(struct kobject *kobj,
 }
 KERNEL_ATTR_RO(kexec_crash_loaded);
 
+static ssize_t kexec_crash_size_show(struct kobject *kobj,
+                                       struct kobj_attribute *attr, char *buf)
+{
+        return sprintf(buf, "%zu\n", crash_get_memory_size());
+}
+static ssize_t kexec_crash_size_store(struct kobject *kobj,
+                                   struct kobj_attribute *attr,
+                                   const char *buf, size_t count)
+{
+        unsigned long cnt;
+        int ret;
+
+        if (strict_strtoul(buf, 0, &cnt))
+                return -EINVAL;
+
+        ret = crash_shrink_memory(cnt);
+        return ret < 0 ? ret : count;
+}
+KERNEL_ATTR_RW(kexec_crash_size);
+
 static ssize_t vmcoreinfo_show(struct kobject *kobj,
                                struct kobj_attribute *attr, char *buf)
 {
@@ -147,6 +167,7 @@ static struct attribute * kernel_attrs[] = {
 #ifdef CONFIG_KEXEC
         &kexec_loaded_attr.attr,
         &kexec_crash_loaded_attr.attr,
+        &kexec_crash_size_attr.attr,
         &vmcoreinfo_attr.attr,
 #endif
         NULL
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 9af56723c096..5feaddcdbe49 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -49,7 +49,7 @@
 #include "lockdep_internals.h"
 
 #define CREATE_TRACE_POINTS
-#include <trace/events/lockdep.h>
+#include <trace/events/lock.h>
 
 #ifdef CONFIG_PROVE_LOCKING
 int prove_locking = 1;
@@ -73,11 +73,11 @@ module_param(lock_stat, int, 0644);
  * to use a raw spinlock - we really dont want the spinlock
  * code to recurse back into the lockdep code...
  */
-static raw_spinlock_t lockdep_lock = (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
+static arch_spinlock_t lockdep_lock = (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
 
 static int graph_lock(void)
 {
-        __raw_spin_lock(&lockdep_lock);
+        arch_spin_lock(&lockdep_lock);
         /*
          * Make sure that if another CPU detected a bug while
          * walking the graph we dont change it (while the other
@@ -85,7 +85,7 @@ static int graph_lock(void)
          * dropped already)
          */
         if (!debug_locks) {
-                __raw_spin_unlock(&lockdep_lock);
+                arch_spin_unlock(&lockdep_lock);
                 return 0;
         }
         /* prevent any recursions within lockdep from causing deadlocks */
@@ -95,11 +95,11 @@ static int graph_lock(void)
 
 static inline int graph_unlock(void)
 {
-        if (debug_locks && !__raw_spin_is_locked(&lockdep_lock))
+        if (debug_locks && !arch_spin_is_locked(&lockdep_lock))
                 return DEBUG_LOCKS_WARN_ON(1);
 
         current->lockdep_recursion--;
-        __raw_spin_unlock(&lockdep_lock);
+        arch_spin_unlock(&lockdep_lock);
         return 0;
 }
 
@@ -111,7 +111,7 @@ static inline int debug_locks_off_graph_unlock(void)
 {
         int ret = debug_locks_off();
 
-        __raw_spin_unlock(&lockdep_lock);
+        arch_spin_unlock(&lockdep_lock);
 
         return ret;
 }
@@ -140,7 +140,8 @@ static inline struct lock_class *hlock_class(struct held_lock *hlock)
 }
 
 #ifdef CONFIG_LOCK_STAT
-static DEFINE_PER_CPU(struct lock_class_stats[MAX_LOCKDEP_KEYS], lock_stats);
+static DEFINE_PER_CPU(struct lock_class_stats[MAX_LOCKDEP_KEYS],
+                      cpu_lock_stats);
 
 static inline u64 lockstat_clock(void)
 {
@@ -168,7 +169,7 @@ static void lock_time_inc(struct lock_time *lt, u64 time)
         if (time > lt->max)
                 lt->max = time;
 
-        if (time < lt->min || !lt->min)
+        if (time < lt->min || !lt->nr)
                 lt->min = time;
 
         lt->total += time;
@@ -177,8 +178,15 @@ static void lock_time_inc(struct lock_time *lt, u64 time)
 
 static inline void lock_time_add(struct lock_time *src, struct lock_time *dst)
 {
-        dst->min += src->min;
-        dst->max += src->max;
+        if (!src->nr)
+                return;
+
+        if (src->max > dst->max)
+                dst->max = src->max;
+
+        if (src->min < dst->min || !dst->nr)
+                dst->min = src->min;
+
         dst->total += src->total;
         dst->nr += src->nr;
 }
@@ -191,7 +199,7 @@ struct lock_class_stats lock_stats(struct lock_class *class)
         memset(&stats, 0, sizeof(struct lock_class_stats));
         for_each_possible_cpu(cpu) {
                 struct lock_class_stats *pcs =
-                        &per_cpu(lock_stats, cpu)[class - lock_classes];
+                        &per_cpu(cpu_lock_stats, cpu)[class - lock_classes];
 
                 for (i = 0; i < ARRAY_SIZE(stats.contention_point); i++)
                         stats.contention_point[i] += pcs->contention_point[i];
@@ -218,7 +226,7 @@ void clear_lock_stats(struct lock_class *class)
 
         for_each_possible_cpu(cpu) {
                 struct lock_class_stats *cpu_stats =
-                        &per_cpu(lock_stats, cpu)[class - lock_classes];
+                        &per_cpu(cpu_lock_stats, cpu)[class - lock_classes];
 
                 memset(cpu_stats, 0, sizeof(struct lock_class_stats));
         }
@@ -228,12 +236,12 @@ void clear_lock_stats(struct lock_class *class)
 
 static struct lock_class_stats *get_lock_stats(struct lock_class *class)
 {
-        return &get_cpu_var(lock_stats)[class - lock_classes];
+        return &get_cpu_var(cpu_lock_stats)[class - lock_classes];
 }
 
 static void put_lock_stats(struct lock_class_stats *stats)
 {
-        put_cpu_var(lock_stats);
+        put_cpu_var(cpu_lock_stats);
 }
 
 static void lock_release_holdtime(struct held_lock *hlock)
@@ -379,7 +387,8 @@ static int save_trace(struct stack_trace *trace)
          * complete trace that maxes out the entries provided will be reported
          * as incomplete, friggin useless </rant>
          */
-        if (trace->entries[trace->nr_entries-1] == ULONG_MAX)
+        if (trace->nr_entries != 0 &&
+            trace->entries[trace->nr_entries-1] == ULONG_MAX)
                 trace->nr_entries--;
 
         trace->max_entries = trace->nr_entries;
@@ -1161,9 +1170,9 @@ unsigned long lockdep_count_forward_deps(struct lock_class *class)
         this.class = class;
 
         local_irq_save(flags);
-        __raw_spin_lock(&lockdep_lock);
+        arch_spin_lock(&lockdep_lock);
         ret = __lockdep_count_forward_deps(&this);
-        __raw_spin_unlock(&lockdep_lock);
+        arch_spin_unlock(&lockdep_lock);
         local_irq_restore(flags);
 
         return ret;
@@ -1188,9 +1197,9 @@ unsigned long lockdep_count_backward_deps(struct lock_class *class)
         this.class = class;
 
         local_irq_save(flags);
-        __raw_spin_lock(&lockdep_lock);
+        arch_spin_lock(&lockdep_lock);
         ret = __lockdep_count_backward_deps(&this);
-        __raw_spin_unlock(&lockdep_lock);
+        arch_spin_unlock(&lockdep_lock);
         local_irq_restore(flags);
 
         return ret;
diff --git a/kernel/module.c b/kernel/module.c
index 5842a71cf052..a65dc787a27b 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -370,8 +370,6 @@ EXPORT_SYMBOL_GPL(find_module);
 
 #ifdef CONFIG_SMP
 
-#ifndef CONFIG_HAVE_LEGACY_PER_CPU_AREA
-
 static void *percpu_modalloc(unsigned long size, unsigned long align,
                              const char *name)
 {
@@ -395,154 +393,6 @@ static void percpu_modfree(void *freeme)
         free_percpu(freeme);
 }
 
-#else /* ... CONFIG_HAVE_LEGACY_PER_CPU_AREA */
-
-/* Number of blocks used and allocated. */
-static unsigned int pcpu_num_used, pcpu_num_allocated;
-/* Size of each block.  -ve means used. */
-static int *pcpu_size;
-
-static int split_block(unsigned int i, unsigned short size)
-{
-        /* Reallocation required? */
-        if (pcpu_num_used + 1 > pcpu_num_allocated) {
-                int *new;
-
-                new = krealloc(pcpu_size, sizeof(new[0])*pcpu_num_allocated*2,
-                               GFP_KERNEL);
-                if (!new)
-                        return 0;
-
-                pcpu_num_allocated *= 2;
-                pcpu_size = new;
-        }
-
-        /* Insert a new subblock */
-        memmove(&pcpu_size[i+1], &pcpu_size[i],
-                sizeof(pcpu_size[0]) * (pcpu_num_used - i));
-        pcpu_num_used++;
-
-        pcpu_size[i+1] -= size;
-        pcpu_size[i] = size;
-        return 1;
-}
-
-static inline unsigned int block_size(int val)
-{
-        if (val < 0)
-                return -val;
-        return val;
-}
-
-static void *percpu_modalloc(unsigned long size, unsigned long align,
-                             const char *name)
-{
-        unsigned long extra;
-        unsigned int i;
-        void *ptr;
-        int cpu;
-
-        if (align > PAGE_SIZE) {
-                printk(KERN_WARNING "%s: per-cpu alignment %li > %li\n",
-                       name, align, PAGE_SIZE);
-                align = PAGE_SIZE;
-        }
-
-        ptr = __per_cpu_start;
-        for (i = 0; i < pcpu_num_used; ptr += block_size(pcpu_size[i]), i++) {
-                /* Extra for alignment requirement. */
-                extra = ALIGN((unsigned long)ptr, align) - (unsigned long)ptr;
-                BUG_ON(i == 0 && extra != 0);
-
-                if (pcpu_size[i] < 0 || pcpu_size[i] < extra + size)
-                        continue;
-
-                /* Transfer extra to previous block. */
-                if (pcpu_size[i-1] < 0)
-                        pcpu_size[i-1] -= extra;
-                else
-                        pcpu_size[i-1] += extra;
-                pcpu_size[i] -= extra;
-                ptr += extra;
-
-                /* Split block if warranted */
-                if (pcpu_size[i] - size > sizeof(unsigned long))
-                        if (!split_block(i, size))
-                                return NULL;
-
-                /* add the per-cpu scanning areas */
-                for_each_possible_cpu(cpu)
-                        kmemleak_alloc(ptr + per_cpu_offset(cpu), size, 0,
-                                       GFP_KERNEL);
-
-                /* Mark allocated */
-                pcpu_size[i] = -pcpu_size[i];
-                return ptr;
-        }
-
-        printk(KERN_WARNING "Could not allocate %lu bytes percpu data\n",
-               size);
-        return NULL;
-}
-
-static void percpu_modfree(void *freeme)
-{
-        unsigned int i;
-        void *ptr = __per_cpu_start + block_size(pcpu_size[0]);
-        int cpu;
-
-        /* First entry is core kernel percpu data. */
-        for (i = 1; i < pcpu_num_used; ptr += block_size(pcpu_size[i]), i++) {
-                if (ptr == freeme) {
-                        pcpu_size[i] = -pcpu_size[i];
-                        goto free;
-                }
-        }
-        BUG();
-
- free:
-        /* remove the per-cpu scanning areas */
-        for_each_possible_cpu(cpu)
-                kmemleak_free(freeme + per_cpu_offset(cpu));
-
-        /* Merge with previous? */
-        if (pcpu_size[i-1] >= 0) {
-                pcpu_size[i-1] += pcpu_size[i];
-                pcpu_num_used--;
-                memmove(&pcpu_size[i], &pcpu_size[i+1],
-                        (pcpu_num_used - i) * sizeof(pcpu_size[0]));
-                i--;
-        }
-        /* Merge with next? */
-        if (i+1 < pcpu_num_used && pcpu_size[i+1] >= 0) {
-                pcpu_size[i] += pcpu_size[i+1];
-                pcpu_num_used--;
-                memmove(&pcpu_size[i+1], &pcpu_size[i+2],
-                        (pcpu_num_used - (i+1)) * sizeof(pcpu_size[0]));
-        }
-}
-
-static int percpu_modinit(void)
-{
-        pcpu_num_used = 2;
-        pcpu_num_allocated = 2;
-        pcpu_size = kmalloc(sizeof(pcpu_size[0]) * pcpu_num_allocated,
-                            GFP_KERNEL);
-        /* Static in-kernel percpu data (used). */
-        pcpu_size[0] = -(__per_cpu_end-__per_cpu_start);
-        /* Free room. */
-        pcpu_size[1] = PERCPU_ENOUGH_ROOM + pcpu_size[0];
-        if (pcpu_size[1] < 0) {
-                printk(KERN_ERR "No per-cpu room for modules.\n");
-                pcpu_num_used = 1;
-        }
-
-        return 0;
-}
-__initcall(percpu_modinit);
-
-#endif /* CONFIG_HAVE_LEGACY_PER_CPU_AREA */
-
 static unsigned int find_pcpusec(Elf_Ehdr *hdr,
                                  Elf_Shdr *sechdrs,
                                  const char *secstrings)
@@ -1030,11 +880,23 @@ static int try_to_force_load(struct module *mod, const char *reason)
 }
 
 #ifdef CONFIG_MODVERSIONS
+/* If the arch applies (non-zero) relocations to kernel kcrctab, unapply it. */
+static unsigned long maybe_relocated(unsigned long crc,
+                                     const struct module *crc_owner)
+{
+#ifdef ARCH_RELOCATES_KCRCTAB
+        if (crc_owner == NULL)
+                return crc - (unsigned long)reloc_start;
+#endif
+        return crc;
+}
+
 static int check_version(Elf_Shdr *sechdrs,
                          unsigned int versindex,
                          const char *symname,
                          struct module *mod, 
-                         const unsigned long *crc)
+                         const unsigned long *crc,
+                         const struct module *crc_owner)
 {
         unsigned int i, num_versions;
         struct modversion_info *versions;
@@ -1055,10 +917,10 @@ static int check_version(Elf_Shdr *sechdrs,
                 if (strcmp(versions[i].name, symname) != 0)
                         continue;
 
-                if (versions[i].crc == *crc)
+                if (versions[i].crc == maybe_relocated(*crc, crc_owner))
                         return 1;
                 DEBUGP("Found checksum %lX vs module %lX\n",
-                       *crc, versions[i].crc);
+                       maybe_relocated(*crc, crc_owner), versions[i].crc);
                 goto bad_version;
         }
 
@@ -1081,7 +943,8 @@ static inline int check_modstruct_version(Elf_Shdr *sechdrs,
         if (!find_symbol(MODULE_SYMBOL_PREFIX "module_layout", NULL,
                          &crc, true, false))
                 BUG();
-        return check_version(sechdrs, versindex, "module_layout", mod, crc);
+        return check_version(sechdrs, versindex, "module_layout", mod, crc,
+                             NULL);
 }
 
 /* First part is kernel version, which we ignore if module has crcs. */
@@ -1099,7 +962,8 @@ static inline int check_version(Elf_Shdr *sechdrs,
                                 unsigned int versindex,
                                 const char *symname,
                                 struct module *mod, 
-                                const unsigned long *crc)
+                                const unsigned long *crc,
+                                const struct module *crc_owner)
 {
         return 1;
 }
@@ -1134,8 +998,8 @@ static const struct kernel_symbol *resolve_symbol(Elf_Shdr *sechdrs,
         /* use_module can fail due to OOM,
            or module initialization or unloading */
         if (sym) {
-                if (!check_version(sechdrs, versindex, name, mod, crc) ||
-                    !use_module(mod, owner))
+                if (!check_version(sechdrs, versindex, name, mod, crc, owner)
+                    || !use_module(mod, owner))
                         sym = NULL;
         }
         return sym;
diff --git a/kernel/mutex-debug.h b/kernel/mutex-debug.h
index 6b2d735846a5..57d527a16f9d 100644
--- a/kernel/mutex-debug.h
+++ b/kernel/mutex-debug.h
@@ -43,13 +43,13 @@ static inline void mutex_clear_owner(struct mutex *lock)
                                                         \
                 DEBUG_LOCKS_WARN_ON(in_interrupt());    \
                 local_irq_save(flags);                  \
-                __raw_spin_lock(&(lock)->raw_lock);     \
+                arch_spin_lock(&(lock)->rlock.raw_lock);\
                 DEBUG_LOCKS_WARN_ON(l->magic != l);     \
         } while (0)
 
-#define spin_unlock_mutex(lock, flags)                  \
-        do {                                            \
-                __raw_spin_unlock(&(lock)->raw_lock);   \
-                local_irq_restore(flags);               \
-                preempt_check_resched();                \
+#define spin_unlock_mutex(lock, flags)                          \
+        do {                                                    \
+                arch_spin_unlock(&(lock)->rlock.raw_lock);      \
+                local_irq_restore(flags);                       \
+                preempt_check_resched();                        \
         } while (0)
diff --git a/kernel/mutex.c b/kernel/mutex.c
index 947b3ad551f8..632f04c57d82 100644
--- a/kernel/mutex.c
+++ b/kernel/mutex.c
@@ -148,8 +148,8 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass,
 
         preempt_disable();
         mutex_acquire(&lock->dep_map, subclass, 0, ip);
-#if defined(CONFIG_SMP) && !defined(CONFIG_DEBUG_MUTEXES) && \
-    !defined(CONFIG_HAVE_DEFAULT_NO_SPIN_MUTEXES)
+
+#ifdef CONFIG_MUTEX_SPIN_ON_OWNER
         /*
          * Optimistic spinning.
          *
diff --git a/kernel/notifier.c b/kernel/notifier.c
index 61d5aa5eced3..acd24e7643eb 100644
--- a/kernel/notifier.c
+++ b/kernel/notifier.c
@@ -558,7 +558,7 @@ EXPORT_SYMBOL(unregister_reboot_notifier);
 
 static ATOMIC_NOTIFIER_HEAD(die_chain);
 
-int notrace notify_die(enum die_val val, const char *str,
+int notrace __kprobes notify_die(enum die_val val, const char *str,
                struct pt_regs *regs, long err, int trap, int sig)
 {
         struct die_args args = {
diff --git a/kernel/panic.c b/kernel/panic.c
index 96b45d0b4ba5..5827f7b97254 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -10,6 +10,7 @@
  */
 #include <linux/debug_locks.h>
 #include <linux/interrupt.h>
+#include <linux/kmsg_dump.h>
 #include <linux/kallsyms.h>
 #include <linux/notifier.h>
 #include <linux/module.h>
@@ -74,6 +75,7 @@ NORET_TYPE void panic(const char * fmt, ...)
         dump_stack();
 #endif
 
+        kmsg_dump(KMSG_DUMP_PANIC);
         /*
          * If we have crashed and we have a crash kernel loaded let it handle
          * everything else.
@@ -339,6 +341,7 @@ void oops_exit(void)
 {
         do_oops_enter_exit();
         print_oops_end_marker();
+        kmsg_dump(KMSG_DUMP_OOPS);
 }
 
 #ifdef WANT_WARN_ON_SLOWPATH
diff --git a/kernel/params.c b/kernel/params.c
index d656c276508d..cf1b69183127 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -24,6 +24,7 @@
 #include <linux/err.h>
 #include <linux/slab.h>
 #include <linux/ctype.h>
+#include <linux/string.h>
 
 #if 0
 #define DEBUGP printk
@@ -122,9 +123,7 @@ static char *next_arg(char *args, char **param, char **val)
                 next = args + i;
 
         /* Chew up trailing spaces. */
-        while (isspace(*next))
-                next++;
-        return next;
+        return skip_spaces(next);
 }
 
 /* Args looks like "foo=bar,bar2 baz=fuz wiz". */
@@ -139,8 +138,7 @@ int parse_args(const char *name,
         DEBUGP("Parsing ARGS: %s\n", args);
 
         /* Chew leading spaces */
-        while (isspace(*args))
-                args++;
+        args = skip_spaces(args);
 
         while (*args) {
                 int ret;
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 7f29643c8985..8ab86988bd24 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -28,13 +28,15 @@
 #include <linux/anon_inodes.h>
 #include <linux/kernel_stat.h>
 #include <linux/perf_event.h>
+#include <linux/ftrace_event.h>
+#include <linux/hw_breakpoint.h>
 
 #include <asm/irq_regs.h>
 
 /*
  * Each CPU has a list of per CPU events:
  */
-DEFINE_PER_CPU(struct perf_cpu_context, perf_cpu_context);
+static DEFINE_PER_CPU(struct perf_cpu_context, perf_cpu_context);
 
 int perf_max_events __read_mostly = 1;
 static int perf_reserved_percpu __read_mostly;
@@ -201,14 +203,14 @@ perf_lock_task_context(struct task_struct *task, unsigned long *flags)
                  * if so.  If we locked the right context, then it
                  * can't get swapped on us any more.
                  */
-                spin_lock_irqsave(&ctx->lock, *flags);
+                raw_spin_lock_irqsave(&ctx->lock, *flags);
                 if (ctx != rcu_dereference(task->perf_event_ctxp)) {
-                        spin_unlock_irqrestore(&ctx->lock, *flags);
+                        raw_spin_unlock_irqrestore(&ctx->lock, *flags);
                         goto retry;
                 }
 
                 if (!atomic_inc_not_zero(&ctx->refcount)) {
-                        spin_unlock_irqrestore(&ctx->lock, *flags);
+                        raw_spin_unlock_irqrestore(&ctx->lock, *flags);
                         ctx = NULL;
                 }
         }
@@ -229,7 +231,7 @@ static struct perf_event_context *perf_pin_task_context(struct task_struct *task
         ctx = perf_lock_task_context(task, &flags);
         if (ctx) {
                 ++ctx->pin_count;
-                spin_unlock_irqrestore(&ctx->lock, flags);
+                raw_spin_unlock_irqrestore(&ctx->lock, flags);
         }
         return ctx;
 }
@@ -238,12 +240,55 @@ static void perf_unpin_context(struct perf_event_context *ctx)
 {
         unsigned long flags;
 
-        spin_lock_irqsave(&ctx->lock, flags);
+        raw_spin_lock_irqsave(&ctx->lock, flags);
         --ctx->pin_count;
-        spin_unlock_irqrestore(&ctx->lock, flags);
+        raw_spin_unlock_irqrestore(&ctx->lock, flags);
         put_ctx(ctx);
 }
 
+static inline u64 perf_clock(void)
+{
+        return cpu_clock(smp_processor_id());
+}
+
+/*
+ * Update the record of the current time in a context.
+ */
+static void update_context_time(struct perf_event_context *ctx)
+{
+        u64 now = perf_clock();
+
+        ctx->time += now - ctx->timestamp;
+        ctx->timestamp = now;
+}
+
+/*
+ * Update the total_time_enabled and total_time_running fields for a event.
+ */
+static void update_event_times(struct perf_event *event)
+{
+        struct perf_event_context *ctx = event->ctx;
+        u64 run_end;
+
+        if (event->state < PERF_EVENT_STATE_INACTIVE ||
+            event->group_leader->state < PERF_EVENT_STATE_INACTIVE)
+                return;
+
+        if (ctx->is_active)
+                run_end = ctx->time;
+        else
+                run_end = event->tstamp_stopped;
+
+        event->total_time_enabled = run_end - event->tstamp_enabled;
+
+        if (event->state == PERF_EVENT_STATE_INACTIVE)
+                run_end = event->tstamp_stopped;
+        else
+                run_end = ctx->time;
+
+        event->total_time_running = run_end - event->tstamp_running;
+}
+
 /*
  * Add a event from the lists for its context.
  * Must be called with ctx->mutex and ctx->lock held.
@@ -292,6 +337,18 @@ list_del_event(struct perf_event *event, struct perf_event_context *ctx)
         if (event->group_leader != event)
                 event->group_leader->nr_siblings--;
 
+        update_event_times(event);
+
+        /*
+         * If event was in error state, then keep it
+         * that way, otherwise bogus counts will be
+         * returned on read(). The only way to get out
+         * of error state is by explicit re-enabling
+         * of the event
+         */
+        if (event->state > PERF_EVENT_STATE_OFF)
+                event->state = PERF_EVENT_STATE_OFF;
+
         /*
          * If this was a group event with sibling events then
          * upgrade the siblings to singleton events by adding them
@@ -370,7 +427,7 @@ static void __perf_event_remove_from_context(void *info)
         if (ctx->task && cpuctx->task_ctx != ctx)
                 return;
 
-        spin_lock(&ctx->lock);
+        raw_spin_lock(&ctx->lock);
         /*
          * Protect the list operation against NMI by disabling the
          * events on a global level.
@@ -392,7 +449,7 @@ static void __perf_event_remove_from_context(void *info)
         }
 
         perf_enable();
-        spin_unlock(&ctx->lock);
+        raw_spin_unlock(&ctx->lock);
 }
 
 
@@ -419,7 +476,7 @@ static void perf_event_remove_from_context(struct perf_event *event)
         if (!task) {
                 /*
                  * Per cpu events are removed via an smp call and
-                 * the removal is always sucessful.
+                 * the removal is always successful.
                  */
                 smp_call_function_single(event->cpu,
                                          __perf_event_remove_from_context,
@@ -431,12 +488,12 @@ retry:
         task_oncpu_function_call(task, __perf_event_remove_from_context,
                                  event);
 
-        spin_lock_irq(&ctx->lock);
+        raw_spin_lock_irq(&ctx->lock);
         /*
          * If the context is active we need to retry the smp call.
          */
         if (ctx->nr_active && !list_empty(&event->group_entry)) {
-                spin_unlock_irq(&ctx->lock);
+                raw_spin_unlock_irq(&ctx->lock);
                 goto retry;
         }
 
@@ -445,48 +502,9 @@ retry:
          * can remove the event safely, if the call above did not
          * succeed.
          */
-        if (!list_empty(&event->group_entry)) {
+        if (!list_empty(&event->group_entry))
                 list_del_event(event, ctx);
-        }
-        spin_unlock_irq(&ctx->lock);
-}
-
-static inline u64 perf_clock(void)
-{
-        return cpu_clock(smp_processor_id());
-}
-
-/*
- * Update the record of the current time in a context.
- */
-static void update_context_time(struct perf_event_context *ctx)
-{
-        u64 now = perf_clock();
-
-        ctx->time += now - ctx->timestamp;
-        ctx->timestamp = now;
-}
-
-/*
- * Update the total_time_enabled and total_time_running fields for a event.
- */
-static void update_event_times(struct perf_event *event)
-{
-        struct perf_event_context *ctx = event->ctx;
-        u64 run_end;
-
-        if (event->state < PERF_EVENT_STATE_INACTIVE ||
-            event->group_leader->state < PERF_EVENT_STATE_INACTIVE)
-                return;
-
-        event->total_time_enabled = ctx->time - event->tstamp_enabled;
-
-        if (event->state == PERF_EVENT_STATE_INACTIVE)
-                run_end = event->tstamp_stopped;
-        else
-                run_end = ctx->time;
-
-        event->total_time_running = run_end - event->tstamp_running;
+        raw_spin_unlock_irq(&ctx->lock);
 }
 
 /*
@@ -517,7 +535,7 @@ static void __perf_event_disable(void *info)
         if (ctx->task && cpuctx->task_ctx != ctx)
                 return;
 
-        spin_lock(&ctx->lock);
+        raw_spin_lock(&ctx->lock);
 
         /*
          * If the event is on, turn it off.
@@ -533,7 +551,7 @@ static void __perf_event_disable(void *info)
                 event->state = PERF_EVENT_STATE_OFF;
         }
 
-        spin_unlock(&ctx->lock);
+        raw_spin_unlock(&ctx->lock);
 }
 
 /*
@@ -549,7 +567,7 @@ static void __perf_event_disable(void *info)
  * is the current context on this CPU and preemption is disabled,
  * hence we can't get into perf_event_task_sched_out for this context.
  */
-static void perf_event_disable(struct perf_event *event)
+void perf_event_disable(struct perf_event *event)
 {
         struct perf_event_context *ctx = event->ctx;
         struct task_struct *task = ctx->task;
@@ -566,12 +584,12 @@ static void perf_event_disable(struct perf_event *event)
  retry:
         task_oncpu_function_call(task, __perf_event_disable, event);
 
-        spin_lock_irq(&ctx->lock);
+        raw_spin_lock_irq(&ctx->lock);
         /*
          * If the event is still active, we need to retry the cross-call.
          */
         if (event->state == PERF_EVENT_STATE_ACTIVE) {
-                spin_unlock_irq(&ctx->lock);
+                raw_spin_unlock_irq(&ctx->lock);
                 goto retry;
         }
 
@@ -584,7 +602,7 @@ static void perf_event_disable(struct perf_event *event)
                 event->state = PERF_EVENT_STATE_OFF;
         }
 
-        spin_unlock_irq(&ctx->lock);
+        raw_spin_unlock_irq(&ctx->lock);
 }
 
 static int
@@ -752,7 +770,7 @@ static void __perf_install_in_context(void *info)
                 cpuctx->task_ctx = ctx;
         }
 
-        spin_lock(&ctx->lock);
+        raw_spin_lock(&ctx->lock);
         ctx->is_active = 1;
         update_context_time(ctx);
 
@@ -764,6 +782,9 @@ static void __perf_install_in_context(void *info)
 
         add_event_to_ctx(event, ctx);
 
+        if (event->cpu != -1 && event->cpu != smp_processor_id())
+                goto unlock;
+
         /*
          * Don't put the event on if it is disabled or if
          * it is in a group and the group isn't on.
@@ -802,7 +823,7 @@ static void __perf_install_in_context(void *info)
  unlock:
         perf_enable();
 
-        spin_unlock(&ctx->lock);
+        raw_spin_unlock(&ctx->lock);
 }
 
 /*
@@ -827,7 +848,7 @@ perf_install_in_context(struct perf_event_context *ctx,
         if (!task) {
                 /*
                  * Per cpu events are installed via an smp call and
-                 * the install is always sucessful.
+                 * the install is always successful.
                  */
                 smp_call_function_single(cpu, __perf_install_in_context,
                                          event, 1);
@@ -838,12 +859,12 @@ retry:
         task_oncpu_function_call(task, __perf_install_in_context,
                                  event);
 
-        spin_lock_irq(&ctx->lock);
+        raw_spin_lock_irq(&ctx->lock);
         /*
          * we need to retry the smp call.
          */
         if (ctx->is_active && list_empty(&event->group_entry)) {
-                spin_unlock_irq(&ctx->lock);
+                raw_spin_unlock_irq(&ctx->lock);
                 goto retry;
         }
 
@@ -854,7 +875,7 @@ retry:
          */
         if (list_empty(&event->group_entry))
                 add_event_to_ctx(event, ctx);
-        spin_unlock_irq(&ctx->lock);
+        raw_spin_unlock_irq(&ctx->lock);
 }
 
 /*
@@ -899,7 +920,7 @@ static void __perf_event_enable(void *info)
                 cpuctx->task_ctx = ctx;
         }
 
-        spin_lock(&ctx->lock);
+        raw_spin_lock(&ctx->lock);
         ctx->is_active = 1;
         update_context_time(ctx);
 
@@ -907,6 +928,9 @@ static void __perf_event_enable(void *info)
                 goto unlock;
         __perf_event_mark_enabled(event, ctx);
 
+        if (event->cpu != -1 && event->cpu != smp_processor_id())
+                goto unlock;
+
         /*
          * If the event is in a group and isn't the group leader,
          * then don't put it on unless the group is on.
@@ -941,7 +965,7 @@ static void __perf_event_enable(void *info)
         }
 
  unlock:
-        spin_unlock(&ctx->lock);
+        raw_spin_unlock(&ctx->lock);
 }
 
 /*
@@ -953,7 +977,7 @@ static void __perf_event_enable(void *info)
  * perf_event_for_each_child or perf_event_for_each as described
  * for perf_event_disable.
  */
-static void perf_event_enable(struct perf_event *event)
+void perf_event_enable(struct perf_event *event)
 {
         struct perf_event_context *ctx = event->ctx;
         struct task_struct *task = ctx->task;
@@ -967,7 +991,7 @@ static void perf_event_enable(struct perf_event *event)
                 return;
         }
 
-        spin_lock_irq(&ctx->lock);
+        raw_spin_lock_irq(&ctx->lock);
         if (event->state >= PERF_EVENT_STATE_INACTIVE)
                 goto out;
 
@@ -982,10 +1006,10 @@ static void perf_event_enable(struct perf_event *event)
                 event->state = PERF_EVENT_STATE_OFF;
 
  retry:
-        spin_unlock_irq(&ctx->lock);
+        raw_spin_unlock_irq(&ctx->lock);
         task_oncpu_function_call(task, __perf_event_enable, event);
 
-        spin_lock_irq(&ctx->lock);
+        raw_spin_lock_irq(&ctx->lock);
 
         /*
          * If the context is active and the event is still off,
@@ -1002,7 +1026,7 @@ static void perf_event_enable(struct perf_event *event)
                 __perf_event_mark_enabled(event, ctx);
 
  out:
-        spin_unlock_irq(&ctx->lock);
+        raw_spin_unlock_irq(&ctx->lock);
 }
 
 static int perf_event_refresh(struct perf_event *event, int refresh)
@@ -1024,20 +1048,20 @@ void __perf_event_sched_out(struct perf_event_context *ctx,
 {
         struct perf_event *event;
 
-        spin_lock(&ctx->lock);
+        raw_spin_lock(&ctx->lock);
         ctx->is_active = 0;
         if (likely(!ctx->nr_events))
                 goto out;
         update_context_time(ctx);
 
         perf_disable();
-        if (ctx->nr_active)
+        if (ctx->nr_active) {
                 list_for_each_entry(event, &ctx->group_list, group_entry)
                         group_sched_out(event, cpuctx, ctx);
-
+        }
         perf_enable();
  out:
-        spin_unlock(&ctx->lock);
+        raw_spin_unlock(&ctx->lock);
 }
 
 /*
@@ -1059,8 +1083,6 @@ static int context_equiv(struct perf_event_context *ctx1,
                 && !ctx1->pin_count && !ctx2->pin_count;
 }
 
-static void __perf_event_read(void *event);
-
 static void __perf_event_sync_stat(struct perf_event *event,
                                      struct perf_event *next_event)
 {
@@ -1078,8 +1100,8 @@ static void __perf_event_sync_stat(struct perf_event *event,
          */
         switch (event->state) {
         case PERF_EVENT_STATE_ACTIVE:
-                __perf_event_read(event);
-                break;
+                event->pmu->read(event);
+                /* fall-through */
 
         case PERF_EVENT_STATE_INACTIVE:
                 update_event_times(event);
@@ -1118,6 +1140,8 @@ static void perf_event_sync_stat(struct perf_event_context *ctx,
         if (!ctx->nr_stat)
                 return;
 
+        update_context_time(ctx);
+
         event = list_first_entry(&ctx->event_list,
                                    struct perf_event, event_entry);
 
@@ -1161,8 +1185,6 @@ void perf_event_task_sched_out(struct task_struct *task,
         if (likely(!ctx || !cpuctx->task_ctx))
                 return;
 
-        update_context_time(ctx);
-
         rcu_read_lock();
         parent = rcu_dereference(ctx->parent_ctx);
         next_ctx = next->perf_event_ctxp;
@@ -1177,8 +1199,8 @@ void perf_event_task_sched_out(struct task_struct *task,
                  * order we take the locks because no other cpu could
                  * be trying to lock both of these tasks.
                  */
-                spin_lock(&ctx->lock);
-                spin_lock_nested(&next_ctx->lock, SINGLE_DEPTH_NESTING);
+                raw_spin_lock(&ctx->lock);
+                raw_spin_lock_nested(&next_ctx->lock, SINGLE_DEPTH_NESTING);
                 if (context_equiv(ctx, next_ctx)) {
                         /*
                          * XXX do we need a memory barrier of sorts
@@ -1192,8 +1214,8 @@ void perf_event_task_sched_out(struct task_struct *task,
 
                         perf_event_sync_stat(ctx, next_ctx);
                 }
-                spin_unlock(&next_ctx->lock);
-                spin_unlock(&ctx->lock);
+                raw_spin_unlock(&next_ctx->lock);
+                raw_spin_unlock(&ctx->lock);
         }
         rcu_read_unlock();
 
@@ -1235,7 +1257,7 @@ __perf_event_sched_in(struct perf_event_context *ctx,
         struct perf_event *event;
         int can_add_hw = 1;
 
-        spin_lock(&ctx->lock);
+        raw_spin_lock(&ctx->lock);
         ctx->is_active = 1;
         if (likely(!ctx->nr_events))
                 goto out;
@@ -1290,7 +1312,7 @@ __perf_event_sched_in(struct perf_event_context *ctx,
         }
         perf_enable();
  out:
-        spin_unlock(&ctx->lock);
+        raw_spin_unlock(&ctx->lock);
 }
 
 /*
@@ -1354,7 +1376,7 @@ static void perf_ctx_adjust_freq(struct perf_event_context *ctx)
         struct hw_perf_event *hwc;
         u64 interrupts, freq;
 
-        spin_lock(&ctx->lock);
+        raw_spin_lock(&ctx->lock);
         list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {
                 if (event->state != PERF_EVENT_STATE_ACTIVE)
                         continue;
@@ -1409,7 +1431,7 @@ static void perf_ctx_adjust_freq(struct perf_event_context *ctx)
                         perf_enable();
                 }
         }
-        spin_unlock(&ctx->lock);
+        raw_spin_unlock(&ctx->lock);
 }
 
 /*
@@ -1422,7 +1444,7 @@ static void rotate_ctx(struct perf_event_context *ctx)
         if (!ctx->nr_events)
                 return;
 
-        spin_lock(&ctx->lock);
+        raw_spin_lock(&ctx->lock);
         /*
          * Rotate the first entry last (works just fine for group events too):
          */
@@ -1433,7 +1455,7 @@ static void rotate_ctx(struct perf_event_context *ctx)
         }
         perf_enable();
 
-        spin_unlock(&ctx->lock);
+        raw_spin_unlock(&ctx->lock);
 }
 
 void perf_event_task_tick(struct task_struct *curr, int cpu)
@@ -1482,7 +1504,7 @@ static void perf_event_enable_on_exec(struct task_struct *task)
 
         __perf_event_task_sched_out(ctx);
 
-        spin_lock(&ctx->lock);
+        raw_spin_lock(&ctx->lock);
 
         list_for_each_entry(event, &ctx->group_list, group_entry) {
                 if (!event->attr.enable_on_exec)
@@ -1500,7 +1522,7 @@ static void perf_event_enable_on_exec(struct task_struct *task)
         if (enabled)
                 unclone_ctx(ctx);
 
-        spin_unlock(&ctx->lock);
+        raw_spin_unlock(&ctx->lock);
 
         perf_event_task_sched_in(task, smp_processor_id());
  out:
@@ -1515,7 +1537,6 @@ static void __perf_event_read(void *info)
         struct perf_cpu_context *cpuctx = &__get_cpu_var(perf_cpu_context);
         struct perf_event *event = info;
         struct perf_event_context *ctx = event->ctx;
-        unsigned long flags;
 
         /*
          * If this is a task context, we need to check whether it is
@@ -1527,12 +1548,12 @@ static void __perf_event_read(void *info)
         if (ctx->task && cpuctx->task_ctx != ctx)
                 return;
 
-        local_irq_save(flags);
-        if (ctx->is_active)
-                update_context_time(ctx);
-        event->pmu->read(event);
+        raw_spin_lock(&ctx->lock);
+        update_context_time(ctx);
         update_event_times(event);
-        local_irq_restore(flags);
+        raw_spin_unlock(&ctx->lock);
+
+        event->pmu->read(event);
 }
 
 static u64 perf_event_read(struct perf_event *event)
@@ -1545,7 +1566,13 @@ static u64 perf_event_read(struct perf_event *event)
                 smp_call_function_single(event->oncpu,
                                          __perf_event_read, event, 1);
         } else if (event->state == PERF_EVENT_STATE_INACTIVE) {
+                struct perf_event_context *ctx = event->ctx;
+                unsigned long flags;
+
+                raw_spin_lock_irqsave(&ctx->lock, flags);
+                update_context_time(ctx);
                 update_event_times(event);
+                raw_spin_unlock_irqrestore(&ctx->lock, flags);
         }
 
         return atomic64_read(&event->count);
@@ -1558,8 +1585,7 @@ static void
 __perf_event_init_context(struct perf_event_context *ctx,
                             struct task_struct *task)
 {
-        memset(ctx, 0, sizeof(*ctx));
-        spin_lock_init(&ctx->lock);
+        raw_spin_lock_init(&ctx->lock);
         mutex_init(&ctx->mutex);
         INIT_LIST_HEAD(&ctx->group_list);
         INIT_LIST_HEAD(&ctx->event_list);
@@ -1575,15 +1601,12 @@ static struct perf_event_context *find_get_context(pid_t pid, int cpu)
         unsigned long flags;
         int err;
 
-        /*
-         * If cpu is not a wildcard then this is a percpu event:
-         */
-        if (cpu != -1) {
+        if (pid == -1 && cpu != -1) {
                 /* Must be root to operate on a CPU event: */
                 if (perf_paranoid_cpu() && !capable(CAP_SYS_ADMIN))
                         return ERR_PTR(-EACCES);
 
-                if (cpu < 0 || cpu > num_possible_cpus())
+                if (cpu < 0 || cpu >= nr_cpumask_bits)
                         return ERR_PTR(-EINVAL);
 
                 /*
@@ -1629,11 +1652,11 @@ static struct perf_event_context *find_get_context(pid_t pid, int cpu)
         ctx = perf_lock_task_context(task, &flags);
         if (ctx) {
                 unclone_ctx(ctx);
-                spin_unlock_irqrestore(&ctx->lock, flags);
+                raw_spin_unlock_irqrestore(&ctx->lock, flags);
         }
 
         if (!ctx) {
-                ctx = kmalloc(sizeof(struct perf_event_context), GFP_KERNEL);
+                ctx = kzalloc(sizeof(struct perf_event_context), GFP_KERNEL);
                 err = -ENOMEM;
                 if (!ctx)
                         goto errout;
@@ -1658,6 +1681,8 @@ static struct perf_event_context *find_get_context(pid_t pid, int cpu)
         return ERR_PTR(err);
 }
 
+static void perf_event_free_filter(struct perf_event *event);
+
 static void free_event_rcu(struct rcu_head *head)
 {
         struct perf_event *event;
@@ -1665,6 +1690,7 @@ static void free_event_rcu(struct rcu_head *head)
         event = container_of(head, struct perf_event, rcu_head);
         if (event->ns)
                 put_pid_ns(event->ns);
+        perf_event_free_filter(event);
         kfree(event);
 }
 
@@ -1696,16 +1722,10 @@ static void free_event(struct perf_event *event)
         call_rcu(&event->rcu_head, free_event_rcu);
 }
 
-/*
- * Called when the last reference to the file is gone.
- */
-static int perf_release(struct inode *inode, struct file *file)
+int perf_event_release_kernel(struct perf_event *event)
 {
-        struct perf_event *event = file->private_data;
         struct perf_event_context *ctx = event->ctx;
 
-        file->private_data = NULL;
-
         WARN_ON_ONCE(ctx->parent_ctx);
         mutex_lock(&ctx->mutex);
         perf_event_remove_from_context(event);
@@ -1720,6 +1740,19 @@ static int perf_release(struct inode *inode, struct file *file)
 
         return 0;
 }
+EXPORT_SYMBOL_GPL(perf_event_release_kernel);
+
+/*
+ * Called when the last reference to the file is gone.
+ */
+static int perf_release(struct inode *inode, struct file *file)
+{
+        struct perf_event *event = file->private_data;
+
+        file->private_data = NULL;
+
+        return perf_event_release_kernel(event);
+}
 
 static int perf_event_read_size(struct perf_event *event)
 {
@@ -1746,91 +1779,94 @@ static int perf_event_read_size(struct perf_event *event)
         return size;
 }
 
-static u64 perf_event_read_value(struct perf_event *event)
+u64 perf_event_read_value(struct perf_event *event, u64 *enabled, u64 *running)
 {
         struct perf_event *child;
         u64 total = 0;
 
+        *enabled = 0;
+        *running = 0;
+
+        mutex_lock(&event->child_mutex);
         total += perf_event_read(event);
-        list_for_each_entry(child, &event->child_list, child_list)
+        *enabled += event->total_time_enabled +
+                        atomic64_read(&event->child_total_time_enabled);
+        *running += event->total_time_running +
+                        atomic64_read(&event->child_total_time_running);
+
+        list_for_each_entry(child, &event->child_list, child_list) {
                 total += perf_event_read(child);
+                *enabled += child->total_time_enabled;
+                *running += child->total_time_running;
+        }
+        mutex_unlock(&event->child_mutex);
 
         return total;
 }
-
-static int perf_event_read_entry(struct perf_event *event,
-                                   u64 read_format, char __user *buf)
-{
-        int n = 0, count = 0;
-        u64 values[2];
-
-        values[n++] = perf_event_read_value(event);
-        if (read_format & PERF_FORMAT_ID)
-                values[n++] = primary_event_id(event);
-
-        count = n * sizeof(u64);
-
-        if (copy_to_user(buf, values, count))
-                return -EFAULT;
-
-        return count;
-}
+EXPORT_SYMBOL_GPL(perf_event_read_value);
 
 static int perf_event_read_group(struct perf_event *event,
                                    u64 read_format, char __user *buf)
 {
         struct perf_event *leader = event->group_leader, *sub;
-        int n = 0, size = 0, err = -EFAULT;
-        u64 values[3];
+        int n = 0, size = 0, ret = -EFAULT;
+        struct perf_event_context *ctx = leader->ctx;
+        u64 values[5];
+        u64 count, enabled, running;
+
+        mutex_lock(&ctx->mutex);
+        count = perf_event_read_value(leader, &enabled, &running);
 
         values[n++] = 1 + leader->nr_siblings;
-        if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
-                values[n++] = leader->total_time_enabled +
-                        atomic64_read(&leader->child_total_time_enabled);
-        }
-        if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
-                values[n++] = leader->total_time_running +
-                        atomic64_read(&leader->child_total_time_running);
-        }
+        if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
+                values[n++] = enabled;
+        if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
+                values[n++] = running;
+        values[n++] = count;
+        if (read_format & PERF_FORMAT_ID)
+                values[n++] = primary_event_id(leader);
 
         size = n * sizeof(u64);
 
         if (copy_to_user(buf, values, size))
-                return -EFAULT;
-
-        err = perf_event_read_entry(leader, read_format, buf + size);
-        if (err < 0)
-                return err;
+                goto unlock;
 
-        size += err;
+        ret = size;
 
         list_for_each_entry(sub, &leader->sibling_list, group_entry) {
-                err = perf_event_read_entry(sub, read_format,
-                                buf + size);
-                if (err < 0)
-                        return err;
+                n = 0;
+
+                values[n++] = perf_event_read_value(sub, &enabled, &running);
+                if (read_format & PERF_FORMAT_ID)
+                        values[n++] = primary_event_id(sub);
+
+                size = n * sizeof(u64);
+
+                if (copy_to_user(buf + ret, values, size)) {
+                        ret = -EFAULT;
+                        goto unlock;
+                }
 
-                size += err;
+                ret += size;
         }
+unlock:
+        mutex_unlock(&ctx->mutex);
 
-        return size;
+        return ret;
 }
 
 static int perf_event_read_one(struct perf_event *event,
                                  u64 read_format, char __user *buf)
 {
+        u64 enabled, running;
         u64 values[4];
         int n = 0;
 
-        values[n++] = perf_event_read_value(event);
-        if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
-                values[n++] = event->total_time_enabled +
-                        atomic64_read(&event->child_total_time_enabled);
-        }
-        if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
-                values[n++] = event->total_time_running +
-                        atomic64_read(&event->child_total_time_running);
-        }
+        values[n++] = perf_event_read_value(event, &enabled, &running);
+        if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
+                values[n++] = enabled;
+        if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
+                values[n++] = running;
         if (read_format & PERF_FORMAT_ID)
                 values[n++] = primary_event_id(event);
 
@@ -1861,12 +1897,10 @@ perf_read_hw(struct perf_event *event, char __user *buf, size_t count)
                 return -ENOSPC;
 
         WARN_ON_ONCE(event->ctx->parent_ctx);
-        mutex_lock(&event->child_mutex);
         if (read_format & PERF_FORMAT_GROUP)
                 ret = perf_event_read_group(event, read_format, buf);
         else
                 ret = perf_event_read_one(event, read_format, buf);
-        mutex_unlock(&event->child_mutex);
 
         return ret;
 }
@@ -1956,7 +1990,7 @@ static int perf_event_period(struct perf_event *event, u64 __user *arg)
         if (!value)
                 return -EINVAL;
 
-        spin_lock_irq(&ctx->lock);
+        raw_spin_lock_irq(&ctx->lock);
         if (event->attr.freq) {
                 if (value > sysctl_perf_event_sample_rate) {
                         ret = -EINVAL;
@@ -1969,12 +2003,13 @@ static int perf_event_period(struct perf_event *event, u64 __user *arg)
                 event->hw.sample_period = value;
         }
 unlock:
-        spin_unlock_irq(&ctx->lock);
+        raw_spin_unlock_irq(&ctx->lock);
 
         return ret;
 }
 
-int perf_event_set_output(struct perf_event *event, int output_fd);
+static int perf_event_set_output(struct perf_event *event, int output_fd);
+static int perf_event_set_filter(struct perf_event *event, void __user *arg);
 
 static long perf_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
@@ -2002,6 +2037,9 @@ static long perf_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
         case PERF_EVENT_IOC_SET_OUTPUT:
                 return perf_event_set_output(event, arg);
 
+        case PERF_EVENT_IOC_SET_FILTER:
+                return perf_event_set_filter(event, (void __user *)arg);
+
         default:
                 return -ENOTTY;
         }
@@ -2174,6 +2212,7 @@ static void perf_mmap_data_free(struct perf_mmap_data *data)
         perf_mmap_free_page((unsigned long)data->user_page);
         for (i = 0; i < data->nr_pages; i++)
                 perf_mmap_free_page((unsigned long)data->data_pages[i]);
+        kfree(data);
 }
 
 #else
@@ -2214,6 +2253,7 @@ static void perf_mmap_data_free_work(struct work_struct *work)
                 perf_mmap_unmark_page(base + (i * PAGE_SIZE));
 
         vfree(base);
+        kfree(data);
 }
 
 static void perf_mmap_data_free(struct perf_mmap_data *data)
@@ -2307,7 +2347,7 @@ perf_mmap_data_init(struct perf_event *event, struct perf_mmap_data *data)
         }
 
         if (!data->watermark)
-                data->watermark = max_t(long, PAGE_SIZE, max_size / 2);
+                data->watermark = max_size / 2;
 
 
         rcu_assign_pointer(event->data, data);
@@ -2319,7 +2359,6 @@ static void perf_mmap_data_free_rcu(struct rcu_head *rcu_head)
 
         data = container_of(rcu_head, struct perf_mmap_data, rcu_head);
         perf_mmap_data_free(data);
-        kfree(data);
 }
 
 static void perf_mmap_data_release(struct perf_event *event)
@@ -2666,20 +2705,21 @@ static void perf_output_wakeup(struct perf_output_handle *handle)
 static void perf_output_lock(struct perf_output_handle *handle)
 {
         struct perf_mmap_data *data = handle->data;
-        int cpu;
+        int cur, cpu = get_cpu();
 
         handle->locked = 0;
 
-        local_irq_save(handle->flags);
-        cpu = smp_processor_id();
-
-        if (in_nmi() && atomic_read(&data->lock) == cpu)
-                return;
+        for (;;) {
+                cur = atomic_cmpxchg(&data->lock, -1, cpu);
+                if (cur == -1) {
+                        handle->locked = 1;
+                        break;
+                }
+                if (cur == cpu)
+                        break;
 
-        while (atomic_cmpxchg(&data->lock, -1, cpu) != -1)
                 cpu_relax();
-
-        handle->locked = 1;
+        }
 }
 
 static void perf_output_unlock(struct perf_output_handle *handle)
@@ -2725,7 +2765,7 @@ again:
         if (atomic_xchg(&data->wakeup, 0))
                 perf_output_wakeup(handle);
 out:
-        local_irq_restore(handle->flags);
+        put_cpu();
 }
 
 void perf_output_copy(struct perf_output_handle *handle,
@@ -3236,15 +3276,10 @@ static void perf_event_task_ctx(struct perf_event_context *ctx,
 {
         struct perf_event *event;
 
-        if (system_state != SYSTEM_RUNNING || list_empty(&ctx->event_list))
-                return;
-
-        rcu_read_lock();
         list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {
                 if (perf_event_task_match(event))
                         perf_event_task_output(event, task_event);
         }
-        rcu_read_unlock();
 }
 
 static void perf_event_task_event(struct perf_task_event *task_event)
@@ -3252,11 +3287,11 @@ static void perf_event_task_event(struct perf_task_event *task_event)
         struct perf_cpu_context *cpuctx;
         struct perf_event_context *ctx = task_event->task_ctx;
 
+        rcu_read_lock();
         cpuctx = &get_cpu_var(perf_cpu_context);
         perf_event_task_ctx(&cpuctx->ctx, task_event);
         put_cpu_var(perf_cpu_context);
 
-        rcu_read_lock();
         if (!ctx)
                 ctx = rcu_dereference(task_event->task->perf_event_ctxp);
         if (ctx)
@@ -3348,15 +3383,10 @@ static void perf_event_comm_ctx(struct perf_event_context *ctx,
 {
         struct perf_event *event;
 
-        if (system_state != SYSTEM_RUNNING || list_empty(&ctx->event_list))
-                return;
-
-        rcu_read_lock();
         list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {
                 if (perf_event_comm_match(event))
                         perf_event_comm_output(event, comm_event);
         }
-        rcu_read_unlock();
 }
 
 static void perf_event_comm_event(struct perf_comm_event *comm_event)
@@ -3367,7 +3397,7 @@ static void perf_event_comm_event(struct perf_comm_event *comm_event)
         char comm[TASK_COMM_LEN];
 
         memset(comm, 0, sizeof(comm));
-        strncpy(comm, comm_event->task->comm, sizeof(comm));
+        strlcpy(comm, comm_event->task->comm, sizeof(comm));
         size = ALIGN(strlen(comm)+1, sizeof(u64));
 
         comm_event->comm = comm;
@@ -3375,11 +3405,11 @@ static void perf_event_comm_event(struct perf_comm_event *comm_event)
 
         comm_event->event_id.header.size = sizeof(comm_event->event_id) + size;
 
+        rcu_read_lock();
         cpuctx = &get_cpu_var(perf_cpu_context);
         perf_event_comm_ctx(&cpuctx->ctx, comm_event);
         put_cpu_var(perf_cpu_context);
 
-        rcu_read_lock();
         /*
          * doesn't really matter which of the child contexts the
          * events ends up in.
@@ -3472,15 +3502,10 @@ static void perf_event_mmap_ctx(struct perf_event_context *ctx,
 {
         struct perf_event *event;
 
-        if (system_state != SYSTEM_RUNNING || list_empty(&ctx->event_list))
-                return;
-
-        rcu_read_lock();
         list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {
                 if (perf_event_mmap_match(event, mmap_event))
                         perf_event_mmap_output(event, mmap_event);
         }
-        rcu_read_unlock();
 }
 
 static void perf_event_mmap_event(struct perf_mmap_event *mmap_event)
@@ -3536,11 +3561,11 @@ got_name:
 
         mmap_event->event_id.header.size = sizeof(mmap_event->event_id) + size;
 
+        rcu_read_lock();
         cpuctx = &get_cpu_var(perf_cpu_context);
         perf_event_mmap_ctx(&cpuctx->ctx, mmap_event);
         put_cpu_var(perf_cpu_context);
 
-        rcu_read_lock();
         /*
          * doesn't really matter which of the child contexts the
          * events ends up in.
@@ -3679,7 +3704,11 @@ static int __perf_event_overflow(struct perf_event *event, int nmi,
                         perf_event_disable(event);
         }
 
-        perf_event_output(event, nmi, data, regs);
+        if (event->overflow_handler)
+                event->overflow_handler(event, nmi, data, regs);
+        else
+                perf_event_output(event, nmi, data, regs);
+
         return ret;
 }
 
@@ -3724,16 +3753,16 @@ again:
         return nr;
 }
 
-static void perf_swevent_overflow(struct perf_event *event,
+static void perf_swevent_overflow(struct perf_event *event, u64 overflow,
                                     int nmi, struct perf_sample_data *data,
                                     struct pt_regs *regs)
 {
         struct hw_perf_event *hwc = &event->hw;
         int throttle = 0;
-        u64 overflow;
 
         data->period = event->hw.last_period;
-        overflow = perf_swevent_set_period(event);
+        if (!overflow)
+                overflow = perf_swevent_set_period(event);
 
         if (hwc->interrupts == MAX_INTERRUPTS)
                 return;
@@ -3766,14 +3795,19 @@ static void perf_swevent_add(struct perf_event *event, u64 nr,
 
         atomic64_add(nr, &event->count);
 
+        if (!regs)
+                return;
+
         if (!hwc->sample_period)
                 return;
 
-        if (!regs)
+        if (nr == 1 && hwc->sample_period == 1 && !event->attr.freq)
+                return perf_swevent_overflow(event, 1, nmi, data, regs);
+
+        if (atomic64_add_negative(nr, &hwc->period_left))
                 return;
 
-        if (!atomic64_add_negative(nr, &hwc->period_left))
-                perf_swevent_overflow(event, nmi, data, regs);
+        perf_swevent_overflow(event, 0, nmi, data, regs);
 }
 
 static int perf_swevent_is_counting(struct perf_event *event)
@@ -3806,25 +3840,44 @@ static int perf_swevent_is_counting(struct perf_event *event)
         return 1;
 }
 
+static int perf_tp_event_match(struct perf_event *event,
+                                struct perf_sample_data *data);
+
+static int perf_exclude_event(struct perf_event *event,
+                              struct pt_regs *regs)
+{
+        if (regs) {
+                if (event->attr.exclude_user && user_mode(regs))
+                        return 1;
+
+                if (event->attr.exclude_kernel && !user_mode(regs))
+                        return 1;
+        }
+
+        return 0;
+}
+
 static int perf_swevent_match(struct perf_event *event,
                                 enum perf_type_id type,
-                                u32 event_id, struct pt_regs *regs)
+                                u32 event_id,
+                                struct perf_sample_data *data,
+                                struct pt_regs *regs)
 {
         if (!perf_swevent_is_counting(event))
                 return 0;
 
         if (event->attr.type != type)
                 return 0;
+
         if (event->attr.config != event_id)
                 return 0;
 
-        if (regs) {
-                if (event->attr.exclude_user && user_mode(regs))
-                        return 0;
+        if (perf_exclude_event(event, regs))
+                return 0;
 
-                if (event->attr.exclude_kernel && !user_mode(regs))
-                        return 0;
-        }
+        if (event->attr.type == PERF_TYPE_TRACEPOINT &&
+            !perf_tp_event_match(event, data))
+                return 0;
 
         return 1;
 }
@@ -3837,49 +3890,59 @@ static void perf_swevent_ctx_event(struct perf_event_context *ctx,
 {
         struct perf_event *event;
 
-        if (system_state != SYSTEM_RUNNING || list_empty(&ctx->event_list))
-                return;
-
-        rcu_read_lock();
         list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {
-                if (perf_swevent_match(event, type, event_id, regs))
+                if (perf_swevent_match(event, type, event_id, data, regs))
                         perf_swevent_add(event, nr, nmi, data, regs);
         }
-        rcu_read_unlock();
 }
 
-static int *perf_swevent_recursion_context(struct perf_cpu_context *cpuctx)
+int perf_swevent_get_recursion_context(void)
 {
+        struct perf_cpu_context *cpuctx = &get_cpu_var(perf_cpu_context);
+        int rctx;
+
         if (in_nmi())
-                return &cpuctx->recursion[3];
+                rctx = 3;
+        else if (in_irq())
+                rctx = 2;
+        else if (in_softirq())
+                rctx = 1;
+        else
+                rctx = 0;
 
-        if (in_irq())
-                return &cpuctx->recursion[2];
+        if (cpuctx->recursion[rctx]) {
+                put_cpu_var(perf_cpu_context);
+                return -1;
+        }
 
-        if (in_softirq())
-                return &cpuctx->recursion[1];
+        cpuctx->recursion[rctx]++;
+        barrier();
 
-        return &cpuctx->recursion[0];
+        return rctx;
 }
+EXPORT_SYMBOL_GPL(perf_swevent_get_recursion_context);
+
+void perf_swevent_put_recursion_context(int rctx)
+{
+        struct perf_cpu_context *cpuctx = &__get_cpu_var(perf_cpu_context);
+        barrier();
+        cpuctx->recursion[rctx]--;
+        put_cpu_var(perf_cpu_context);
+}
+EXPORT_SYMBOL_GPL(perf_swevent_put_recursion_context);
 
 static void do_perf_sw_event(enum perf_type_id type, u32 event_id,
                                     u64 nr, int nmi,
                                     struct perf_sample_data *data,
                                     struct pt_regs *regs)
 {
-        struct perf_cpu_context *cpuctx = &get_cpu_var(perf_cpu_context);
-        int *recursion = perf_swevent_recursion_context(cpuctx);
+        struct perf_cpu_context *cpuctx;
         struct perf_event_context *ctx;
 
-        if (*recursion)
-                goto out;
-
-        (*recursion)++;
-        barrier();
-
+        cpuctx = &__get_cpu_var(perf_cpu_context);
+        rcu_read_lock();
         perf_swevent_ctx_event(&cpuctx->ctx, type, event_id,
                                  nr, nmi, data, regs);
-        rcu_read_lock();
         /*
          * doesn't really matter which of the child contexts the
          * events ends up in.
@@ -3888,23 +3951,24 @@ static void do_perf_sw_event(enum perf_type_id type, u32 event_id,
         if (ctx)
                 perf_swevent_ctx_event(ctx, type, event_id, nr, nmi, data, regs);
         rcu_read_unlock();
-
-        barrier();
-        (*recursion)--;
-
-out:
-        put_cpu_var(perf_cpu_context);
 }
 
 void __perf_sw_event(u32 event_id, u64 nr, int nmi,
                             struct pt_regs *regs, u64 addr)
 {
-        struct perf_sample_data data = {
-                .addr = addr,
-        };
+        struct perf_sample_data data;
+        int rctx;
 
-        do_perf_sw_event(PERF_TYPE_SOFTWARE, event_id, nr, nmi,
-                                &data, regs);
+        rctx = perf_swevent_get_recursion_context();
+        if (rctx < 0)
+                return;
+
+        data.addr = addr;
+        data.raw  = NULL;
+
+        do_perf_sw_event(PERF_TYPE_SOFTWARE, event_id, nr, nmi, &data, regs);
+
+        perf_swevent_put_recursion_context(rctx);
 }
 
 static void perf_swevent_read(struct perf_event *event)
@@ -3949,6 +4013,8 @@ static enum hrtimer_restart perf_swevent_hrtimer(struct hrtimer *hrtimer)
         event->pmu->read(event);
 
         data.addr = 0;
+        data.raw = NULL;
+        data.period = event->hw.last_period;
         regs = get_irq_regs();
         /*
          * In case we exclude kernel IPs or are somehow not in interrupt
@@ -4017,8 +4083,7 @@ static void cpu_clock_perf_event_update(struct perf_event *event)
         u64 now;
 
         now = cpu_clock(cpu);
-        prev = atomic64_read(&event->hw.prev_count);
-        atomic64_set(&event->hw.prev_count, now);
+        prev = atomic64_xchg(&event->hw.prev_count, now);
         atomic64_add(now - prev, &event->count);
 }
 
@@ -4108,6 +4173,7 @@ static const struct pmu perf_ops_task_clock = {
 };
 
 #ifdef CONFIG_EVENT_PROFILE
+
 void perf_tp_event(int event_id, u64 addr, u64 count, void *record,
                           int entry_size)
 {
@@ -4126,13 +4192,21 @@ void perf_tp_event(int event_id, u64 addr, u64 count, void *record,
         if (!regs)
                 regs = task_pt_regs(current);
 
+        /* Trace events already protected against recursion */
         do_perf_sw_event(PERF_TYPE_TRACEPOINT, event_id, count, 1,
                                 &data, regs);
 }
 EXPORT_SYMBOL_GPL(perf_tp_event);
 
-extern int ftrace_profile_enable(int);
-extern void ftrace_profile_disable(int);
+static int perf_tp_event_match(struct perf_event *event,
+                                struct perf_sample_data *data)
+{
+        void *record = data->raw->data;
+
+        if (likely(!event->filter) || filter_match_preds(event->filter, record))
+                return 1;
+        return 0;
+}
 
 static void tp_perf_event_destroy(struct perf_event *event)
 {
@@ -4157,11 +4231,93 @@ static const struct pmu *tp_perf_event_init(struct perf_event *event)
 
         return &perf_ops_generic;
 }
+
+static int perf_event_set_filter(struct perf_event *event, void __user *arg)
+{
+        char *filter_str;
+        int ret;
+
+        if (event->attr.type != PERF_TYPE_TRACEPOINT)
+                return -EINVAL;
+
+        filter_str = strndup_user(arg, PAGE_SIZE);
+        if (IS_ERR(filter_str))
+                return PTR_ERR(filter_str);
+
+        ret = ftrace_profile_set_filter(event, event->attr.config, filter_str);
+
+        kfree(filter_str);
+        return ret;
+}
+
+static void perf_event_free_filter(struct perf_event *event)
+{
+        ftrace_profile_free_filter(event);
+}
+
 #else
+
+static int perf_tp_event_match(struct perf_event *event,
+                                struct perf_sample_data *data)
+{
+        return 1;
+}
+
 static const struct pmu *tp_perf_event_init(struct perf_event *event)
 {
         return NULL;
 }
+
+static int perf_event_set_filter(struct perf_event *event, void __user *arg)
+{
+        return -ENOENT;
+}
+
+static void perf_event_free_filter(struct perf_event *event)
+{
+}
+
+#endif /* CONFIG_EVENT_PROFILE */
+
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+static void bp_perf_event_destroy(struct perf_event *event)
+{
+        release_bp_slot(event);
+}
+
+static const struct pmu *bp_perf_event_init(struct perf_event *bp)
+{
+        int err;
+
+        err = register_perf_hw_breakpoint(bp);
+        if (err)
+                return ERR_PTR(err);
+
+        bp->destroy = bp_perf_event_destroy;
+
+        return &perf_ops_bp;
+}
+
+void perf_bp_event(struct perf_event *bp, void *data)
+{
+        struct perf_sample_data sample;
+        struct pt_regs *regs = data;
+
+        sample.raw = NULL;
+        sample.addr = bp->attr.bp_addr;
+
+        if (!perf_exclude_event(bp, regs))
+                perf_swevent_add(bp, 1, 1, &sample, regs);
+}
+#else
+static const struct pmu *bp_perf_event_init(struct perf_event *bp)
+{
+        return NULL;
+}
+
+void perf_bp_event(struct perf_event *bp, void *regs)
+{
+}
 #endif
 
 atomic_t perf_swevent_enabled[PERF_COUNT_SW_MAX];
@@ -4208,6 +4364,8 @@ static const struct pmu *sw_perf_event_init(struct perf_event *event)
         case PERF_COUNT_SW_PAGE_FAULTS_MAJ:
         case PERF_COUNT_SW_CONTEXT_SWITCHES:
         case PERF_COUNT_SW_CPU_MIGRATIONS:
+        case PERF_COUNT_SW_ALIGNMENT_FAULTS:
+        case PERF_COUNT_SW_EMULATION_FAULTS:
                 if (!event->parent) {
                         atomic_inc(&perf_swevent_enabled[event_id]);
                         event->destroy = sw_perf_event_destroy;
@@ -4228,6 +4386,7 @@ perf_event_alloc(struct perf_event_attr *attr,
                    struct perf_event_context *ctx,
                    struct perf_event *group_leader,
                    struct perf_event *parent_event,
+                   perf_overflow_handler_t overflow_handler,
                    gfp_t gfpflags)
 {
         const struct pmu *pmu;
@@ -4270,6 +4429,11 @@ perf_event_alloc(struct perf_event_attr *attr,
 
         event->state            = PERF_EVENT_STATE_INACTIVE;
 
+        if (!overflow_handler && parent_event)
+                overflow_handler = parent_event->overflow_handler;
+        
+        event->overflow_handler = overflow_handler;
+
         if (attr->disabled)
                 event->state = PERF_EVENT_STATE_OFF;
 
@@ -4304,6 +4468,11 @@ perf_event_alloc(struct perf_event_attr *attr,
                 pmu = tp_perf_event_init(event);
                 break;
 
+        case PERF_TYPE_BREAKPOINT:
+                pmu = bp_perf_event_init(event);
+                break;
+
+
         default:
                 break;
         }
@@ -4398,7 +4567,7 @@ static int perf_copy_attr(struct perf_event_attr __user *uattr,
         if (attr->type >= PERF_TYPE_MAX)
                 return -EINVAL;
 
-        if (attr->__reserved_1 || attr->__reserved_2 || attr->__reserved_3)
+        if (attr->__reserved_1 || attr->__reserved_2)
                 return -EINVAL;
 
         if (attr->sample_type & ~(PERF_SAMPLE_MAX-1))
@@ -4416,7 +4585,7 @@ err_size:
         goto out;
 }
 
-int perf_event_set_output(struct perf_event *event, int output_fd)
+static int perf_event_set_output(struct perf_event *event, int output_fd)
 {
         struct perf_event *output_event = NULL;
         struct file *output_file = NULL;
@@ -4546,7 +4715,7 @@ SYSCALL_DEFINE5(perf_event_open,
         }
 
         event = perf_event_alloc(&attr, cpu, ctx, group_leader,
-                                     NULL, GFP_KERNEL);
+                                     NULL, NULL, GFP_KERNEL);
         err = PTR_ERR(event);
         if (IS_ERR(event))
                 goto err_put_context;
@@ -4594,6 +4763,61 @@ err_put_context:
         return err;
 }
 
+/**
+ * perf_event_create_kernel_counter
+ *
+ * @attr: attributes of the counter to create
+ * @cpu: cpu in which the counter is bound
+ * @pid: task to profile
+ */
+struct perf_event *
+perf_event_create_kernel_counter(struct perf_event_attr *attr, int cpu,
+                                 pid_t pid,
+                                 perf_overflow_handler_t overflow_handler)
+{
+        struct perf_event *event;
+        struct perf_event_context *ctx;
+        int err;
+
+        /*
+         * Get the target context (task or percpu):
+         */
+
+        ctx = find_get_context(pid, cpu);
+        if (IS_ERR(ctx)) {
+                err = PTR_ERR(ctx);
+                goto err_exit;
+        }
+
+        event = perf_event_alloc(attr, cpu, ctx, NULL,
+                                 NULL, overflow_handler, GFP_KERNEL);
+        if (IS_ERR(event)) {
+                err = PTR_ERR(event);
+                goto err_put_context;
+        }
+
+        event->filp = NULL;
+        WARN_ON_ONCE(ctx->parent_ctx);
+        mutex_lock(&ctx->mutex);
+        perf_install_in_context(ctx, event, cpu);
+        ++ctx->generation;
+        mutex_unlock(&ctx->mutex);
+
+        event->owner = current;
+        get_task_struct(current);
+        mutex_lock(&current->perf_event_mutex);
+        list_add_tail(&event->owner_entry, &current->perf_event_list);
+        mutex_unlock(&current->perf_event_mutex);
+
+        return event;
+
+ err_put_context:
+        put_ctx(ctx);
+ err_exit:
+        return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(perf_event_create_kernel_counter);
+
 /*
  * inherit a event from parent task to child task:
  */
@@ -4619,7 +4843,7 @@ inherit_event(struct perf_event *parent_event,
         child_event = perf_event_alloc(&parent_event->attr,
                                            parent_event->cpu, child_ctx,
                                            group_leader, parent_event,
-                                           GFP_KERNEL);
+                                           NULL, GFP_KERNEL);
         if (IS_ERR(child_event))
                 return child_event;
         get_ctx(child_ctx);
@@ -4637,6 +4861,8 @@ inherit_event(struct perf_event *parent_event,
         if (parent_event->attr.freq)
                 child_event->hw.sample_period = parent_event->hw.sample_period;
 
+        child_event->overflow_handler = parent_event->overflow_handler;
+
         /*
          * Link it up in the child's context:
          */
@@ -4726,7 +4952,6 @@ __perf_event_exit_task(struct perf_event *child_event,
 {
         struct perf_event *parent_event;
 
-        update_event_times(child_event);
         perf_event_remove_from_context(child_event);
 
         parent_event = child_event->parent;
@@ -4770,7 +4995,7 @@ void perf_event_exit_task(struct task_struct *child)
          * reading child->perf_event_ctxp, we wait until it has
          * incremented the context's refcount before we do put_ctx below.
          */
-        spin_lock(&child_ctx->lock);
+        raw_spin_lock(&child_ctx->lock);
         child->perf_event_ctxp = NULL;
         /*
          * If this context is a clone; unclone it so it can't get
@@ -4778,7 +5003,8 @@ void perf_event_exit_task(struct task_struct *child)
          * the events from it.
          */
         unclone_ctx(child_ctx);
-        spin_unlock_irqrestore(&child_ctx->lock, flags);
+        update_context_time(child_ctx);
+        raw_spin_unlock_irqrestore(&child_ctx->lock, flags);
 
         /*
          * Report the task dead after unscheduling the events so that we
@@ -4861,7 +5087,7 @@ again:
  */
 int perf_event_init_task(struct task_struct *child)
 {
-        struct perf_event_context *child_ctx, *parent_ctx;
+        struct perf_event_context *child_ctx = NULL, *parent_ctx;
         struct perf_event_context *cloned_ctx;
         struct perf_event *event;
         struct task_struct *parent = current;
@@ -4877,20 +5103,6 @@ int perf_event_init_task(struct task_struct *child)
                 return 0;
 
         /*
-         * This is executed from the parent task context, so inherit
-         * events that have been marked for cloning.
-         * First allocate and initialize a context for the child.
-         */
-
-        child_ctx = kmalloc(sizeof(struct perf_event_context), GFP_KERNEL);
-        if (!child_ctx)
-                return -ENOMEM;
-
-        __perf_event_init_context(child_ctx, child);
-        child->perf_event_ctxp = child_ctx;
-        get_task_struct(child);
-
-        /*
          * If the parent's context is a clone, pin it so it won't get
          * swapped under us.
          */
@@ -4920,6 +5132,26 @@ int perf_event_init_task(struct task_struct *child)
                         continue;
                 }
 
+                if (!child->perf_event_ctxp) {
+                        /*
+                         * This is executed from the parent task context, so
+                         * inherit events that have been marked for cloning.
+                         * First allocate and initialize a context for the
+                         * child.
+                         */
+
+                        child_ctx = kzalloc(sizeof(struct perf_event_context),
+                                            GFP_KERNEL);
+                        if (!child_ctx) {
+                                ret = -ENOMEM;
+                                goto exit;
+                        }
+
+                        __perf_event_init_context(child_ctx, child);
+                        child->perf_event_ctxp = child_ctx;
+                        get_task_struct(child);
+                }
+
                 ret = inherit_group(event, parent, parent_ctx,
                                              child, child_ctx);
                 if (ret) {
@@ -4948,6 +5180,7 @@ int perf_event_init_task(struct task_struct *child)
                 get_ctx(child_ctx->parent_ctx);
         }
 
+exit:
         mutex_unlock(&parent_ctx->mutex);
 
         perf_unpin_context(parent_ctx);
@@ -5062,11 +5295,11 @@ perf_set_reserve_percpu(struct sysdev_class *class,
         perf_reserved_percpu = val;
         for_each_online_cpu(cpu) {
                 cpuctx = &per_cpu(perf_cpu_context, cpu);
-                spin_lock_irq(&cpuctx->ctx.lock);
+                raw_spin_lock_irq(&cpuctx->ctx.lock);
                 mpt = min(perf_max_events - cpuctx->ctx.nr_events,
                           perf_max_events - perf_reserved_percpu);
                 cpuctx->max_pertask = mpt;
-                spin_unlock_irq(&cpuctx->ctx.lock);
+                raw_spin_unlock_irq(&cpuctx->ctx.lock);
         }
         spin_unlock(&perf_resource_lock);
 
diff --git a/kernel/pid.c b/kernel/pid.c
index d3f722d20f9c..2e17c9c92cbe 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -141,11 +141,12 @@ static int alloc_pidmap(struct pid_namespace *pid_ns)
                          * installing it:
                          */
                         spin_lock_irq(&pidmap_lock);
-                        if (map->page)
-                                kfree(page);
-                        else
+                        if (!map->page) {
                                 map->page = page;
+                                page = NULL;
+                        }
                         spin_unlock_irq(&pidmap_lock);
+                        kfree(page);
                         if (unlikely(!map->page))
                                 break;
                 }
@@ -268,12 +269,11 @@ struct pid *alloc_pid(struct pid_namespace *ns)
         for (type = 0; type < PIDTYPE_MAX; ++type)
                 INIT_HLIST_HEAD(&pid->tasks[type]);
 
+        upid = pid->numbers + ns->level;
         spin_lock_irq(&pidmap_lock);
-        for (i = ns->level; i >= 0; i--) {
-                upid = &pid->numbers[i];
+        for ( ; upid >= pid->numbers; --upid)
                 hlist_add_head_rcu(&upid->pid_chain,
                                 &pid_hash[pid_hashfn(upid->nr, upid->ns)]);
-        }
         spin_unlock_irq(&pidmap_lock);
 
 out:
diff --git a/kernel/pm_qos_params.c b/kernel/pm_qos_params.c
index dfdec524d1b7..3db49b9ca374 100644
--- a/kernel/pm_qos_params.c
+++ b/kernel/pm_qos_params.c
@@ -29,7 +29,6 @@
 
 #include <linux/pm_qos_params.h>
 #include <linux/sched.h>
-#include <linux/smp_lock.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
 #include <linux/time.h>
@@ -344,37 +343,33 @@ int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier)
 }
 EXPORT_SYMBOL_GPL(pm_qos_remove_notifier);
 
-#define PID_NAME_LEN sizeof("process_1234567890")
-static char name[PID_NAME_LEN];
+#define PID_NAME_LEN 32
 
 static int pm_qos_power_open(struct inode *inode, struct file *filp)
 {
         int ret;
         long pm_qos_class;
+        char name[PID_NAME_LEN];
 
-        lock_kernel();
         pm_qos_class = find_pm_qos_object_by_minor(iminor(inode));
         if (pm_qos_class >= 0) {
                 filp->private_data = (void *)pm_qos_class;
-                sprintf(name, "process_%d", current->pid);
+                snprintf(name, PID_NAME_LEN, "process_%d", current->pid);
                 ret = pm_qos_add_requirement(pm_qos_class, name,
                                         PM_QOS_DEFAULT_VALUE);
-                if (ret >= 0) {
-                        unlock_kernel();
+                if (ret >= 0)
                         return 0;
-                }
         }
-        unlock_kernel();
-
         return -EPERM;
 }
 
 static int pm_qos_power_release(struct inode *inode, struct file *filp)
 {
         int pm_qos_class;
+        char name[PID_NAME_LEN];
 
         pm_qos_class = (long)filp->private_data;
-        sprintf(name, "process_%d", current->pid);
+        snprintf(name, PID_NAME_LEN, "process_%d", current->pid);
         pm_qos_remove_requirement(pm_qos_class, name);
 
         return 0;
@@ -385,13 +380,14 @@ static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf,
 {
         s32 value;
         int pm_qos_class;
+        char name[PID_NAME_LEN];
 
         pm_qos_class = (long)filp->private_data;
         if (count != sizeof(s32))
                 return -EINVAL;
         if (copy_from_user(&value, buf, sizeof(s32)))
                 return -EFAULT;
-        sprintf(name, "process_%d", current->pid);
+        snprintf(name, PID_NAME_LEN, "process_%d", current->pid);
         pm_qos_update_requirement(pm_qos_class, name, value);
 
         return  sizeof(s32);
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 5c9dc228747b..438ff4523513 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -384,7 +384,8 @@ int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *tp)
 
 /*
  * Validate the clockid_t for a new CPU-clock timer, and initialize the timer.
- * This is called from sys_timer_create with the new timer already locked.
+ * This is called from sys_timer_create() and do_cpu_nanosleep() with the
+ * new timer already all-zeros initialized.
  */
 int posix_cpu_timer_create(struct k_itimer *new_timer)
 {
@@ -396,8 +397,6 @@ int posix_cpu_timer_create(struct k_itimer *new_timer)
                 return -EINVAL;
 
         INIT_LIST_HEAD(&new_timer->it.cpu.entry);
-        new_timer->it.cpu.incr.sched = 0;
-        new_timer->it.cpu.expires.sched = 0;
 
         read_lock(&tasklist_lock);
         if (CPUCLOCK_PERTHREAD(new_timer->it_clock)) {
diff --git a/kernel/power/Makefile b/kernel/power/Makefile
index c3b81c30e5d5..43191815f874 100644
--- a/kernel/power/Makefile
+++ b/kernel/power/Makefile
@@ -8,7 +8,7 @@ obj-$(CONFIG_PM_SLEEP)		+= console.o
 obj-$(CONFIG_FREEZER)           += process.o
 obj-$(CONFIG_SUSPEND)           += suspend.o
 obj-$(CONFIG_PM_TEST_SUSPEND)   += suspend_test.o
-obj-$(CONFIG_HIBERNATION)       += swsusp.o hibernate.o snapshot.o swap.o user.o
+obj-$(CONFIG_HIBERNATION)       += hibernate.o snapshot.o swap.o user.o
 obj-$(CONFIG_HIBERNATION_NVS)   += hibernate_nvs.o
 
 obj-$(CONFIG_MAGIC_SYSRQ)       += poweroff.o
diff --git a/kernel/power/console.c b/kernel/power/console.c
index 5187136fe1de..218e5af90156 100644
--- a/kernel/power/console.c
+++ b/kernel/power/console.c
@@ -6,7 +6,7 @@
 
 #include <linux/vt_kern.h>
 #include <linux/kbd_kern.h>
-#include <linux/console.h>
+#include <linux/vt.h>
 #include <linux/module.h>
 #include "power.h"
 
@@ -21,8 +21,7 @@ int pm_prepare_console(void)
         if (orig_fgconsole < 0)
                 return 1;
 
-        orig_kmsg = kmsg_redirect;
-        kmsg_redirect = SUSPEND_CONSOLE;
+        orig_kmsg = vt_kmsg_redirect(SUSPEND_CONSOLE);
         return 0;
 }
 
@@ -30,7 +29,7 @@ void pm_restore_console(void)
 {
         if (orig_fgconsole >= 0) {
                 vt_move_to_console(orig_fgconsole, 0);
-                kmsg_redirect = orig_kmsg;
+                vt_kmsg_redirect(orig_kmsg);
         }
 }
 #endif
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 04a9e90d248f..bbfe472d7524 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -32,6 +32,7 @@ static int noresume = 0;
 static char resume_file[256] = CONFIG_PM_STD_PARTITION;
 dev_t swsusp_resume_device;
 sector_t swsusp_resume_block;
+int in_suspend __nosavedata = 0;
 
 enum {
         HIBERNATION_INVALID,
@@ -202,6 +203,35 @@ static void platform_recover(int platform_mode)
 }
 
 /**
+ *      swsusp_show_speed - print the time elapsed between two events.
+ *      @start: Starting event.
+ *      @stop: Final event.
+ *      @nr_pages -     number of pages processed between @start and @stop
+ *      @msg -          introductory message to print
+ */
+
+void swsusp_show_speed(struct timeval *start, struct timeval *stop,
+                        unsigned nr_pages, char *msg)
+{
+        s64 elapsed_centisecs64;
+        int centisecs;
+        int k;
+        int kps;
+
+        elapsed_centisecs64 = timeval_to_ns(stop) - timeval_to_ns(start);
+        do_div(elapsed_centisecs64, NSEC_PER_SEC / 100);
+        centisecs = elapsed_centisecs64;
+        if (centisecs == 0)
+                centisecs = 1;  /* avoid div-by-zero */
+        k = nr_pages * (PAGE_SIZE / 1024);
+        kps = (k * 100) / centisecs;
+        printk(KERN_INFO "PM: %s %d kbytes in %d.%02d seconds (%d.%02d MB/s)\n",
+                        msg, k,
+                        centisecs / 100, centisecs % 100,
+                        kps / 1000, (kps % 1000) / 10);
+}
+
+/**
  *      create_image - freeze devices that need to be frozen with interrupts
  *      off, create the hibernation image and thaw those devices.  Control
  *      reappears in this routine after a restore.
diff --git a/kernel/power/main.c b/kernel/power/main.c
index 347d2cc88cd0..0998c7139053 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -220,6 +220,7 @@ static struct attribute_group attr_group = {
 
 #ifdef CONFIG_PM_RUNTIME
 struct workqueue_struct *pm_wq;
+EXPORT_SYMBOL_GPL(pm_wq);
 
 static int __init pm_start_workqueue(void)
 {
diff --git a/kernel/power/process.c b/kernel/power/process.c
index cc2e55373b68..5ade1bdcf366 100644
--- a/kernel/power/process.c
+++ b/kernel/power/process.c
@@ -14,6 +14,7 @@
 #include <linux/module.h>
 #include <linux/syscalls.h>
 #include <linux/freezer.h>
+#include <linux/delay.h>
 
 /* 
  * Timeout for stopping processes
@@ -41,7 +42,7 @@ static int try_to_freeze_tasks(bool sig_only)
         do_gettimeofday(&start);
 
         end_time = jiffies + TIMEOUT;
-        do {
+        while (true) {
                 todo = 0;
                 read_lock(&tasklist_lock);
                 do_each_thread(g, p) {
@@ -62,10 +63,15 @@ static int try_to_freeze_tasks(bool sig_only)
                                 todo++;
                 } while_each_thread(g, p);
                 read_unlock(&tasklist_lock);
-                yield();                        /* Yield is okay here */
-                if (time_after(jiffies, end_time))
+                if (!todo || time_after(jiffies, end_time))
                         break;
-        } while (todo);
+
+                /*
+                 * We need to retry, but first give the freezing tasks some
+                 * time to enter the regrigerator.
+                 */
+                msleep(10);
+        }
 
         do_gettimeofday(&end);
         elapsed_csecs64 = timeval_to_ns(&end) - timeval_to_ns(&start);
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index 890f6b11b1d3..09b2b0ae9e9d 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -38,6 +38,107 @@ struct swsusp_header {
 
 static struct swsusp_header *swsusp_header;
 
+/**
+ *      The following functions are used for tracing the allocated
+ *      swap pages, so that they can be freed in case of an error.
+ */
+
+struct swsusp_extent {
+        struct rb_node node;
+        unsigned long start;
+        unsigned long end;
+};
+
+static struct rb_root swsusp_extents = RB_ROOT;
+
+static int swsusp_extents_insert(unsigned long swap_offset)
+{
+        struct rb_node **new = &(swsusp_extents.rb_node);
+        struct rb_node *parent = NULL;
+        struct swsusp_extent *ext;
+
+        /* Figure out where to put the new node */
+        while (*new) {
+                ext = container_of(*new, struct swsusp_extent, node);
+                parent = *new;
+                if (swap_offset < ext->start) {
+                        /* Try to merge */
+                        if (swap_offset == ext->start - 1) {
+                                ext->start--;
+                                return 0;
+                        }
+                        new = &((*new)->rb_left);
+                } else if (swap_offset > ext->end) {
+                        /* Try to merge */
+                        if (swap_offset == ext->end + 1) {
+                                ext->end++;
+                                return 0;
+                        }
+                        new = &((*new)->rb_right);
+                } else {
+                        /* It already is in the tree */
+                        return -EINVAL;
+                }
+        }
+        /* Add the new node and rebalance the tree. */
+        ext = kzalloc(sizeof(struct swsusp_extent), GFP_KERNEL);
+        if (!ext)
+                return -ENOMEM;
+
+        ext->start = swap_offset;
+        ext->end = swap_offset;
+        rb_link_node(&ext->node, parent, new);
+        rb_insert_color(&ext->node, &swsusp_extents);
+        return 0;
+}
+
+/**
+ *      alloc_swapdev_block - allocate a swap page and register that it has
+ *      been allocated, so that it can be freed in case of an error.
+ */
+
+sector_t alloc_swapdev_block(int swap)
+{
+        unsigned long offset;
+
+        offset = swp_offset(get_swap_page_of_type(swap));
+        if (offset) {
+                if (swsusp_extents_insert(offset))
+                        swap_free(swp_entry(swap, offset));
+                else
+                        return swapdev_block(swap, offset);
+        }
+        return 0;
+}
+
+/**
+ *      free_all_swap_pages - free swap pages allocated for saving image data.
+ *      It also frees the extents used to register which swap entres had been
+ *      allocated.
+ */
+
+void free_all_swap_pages(int swap)
+{
+        struct rb_node *node;
+
+        while ((node = swsusp_extents.rb_node)) {
+                struct swsusp_extent *ext;
+                unsigned long offset;
+
+                ext = container_of(node, struct swsusp_extent, node);
+                rb_erase(node, &swsusp_extents);
+                for (offset = ext->start; offset <= ext->end; offset++)
+                        swap_free(swp_entry(swap, offset));
+
+                kfree(ext);
+        }
+}
+
+int swsusp_swap_in_use(void)
+{
+        return (swsusp_extents.rb_node != NULL);
+}
+
 /*
  * General things
  */
@@ -336,7 +437,7 @@ static int save_image(struct swap_map_handle *handle,
                 if (ret)
                         break;
                 if (!(nr_pages % m))
-                        printk("\b\b\b\b%3d%%", nr_pages / m);
+                        printk(KERN_CONT "\b\b\b\b%3d%%", nr_pages / m);
                 nr_pages++;
         }
         err2 = wait_on_bio_chain(&bio);
@@ -344,9 +445,9 @@ static int save_image(struct swap_map_handle *handle,
         if (!ret)
                 ret = err2;
         if (!ret)
-                printk("\b\b\b\bdone\n");
+                printk(KERN_CONT "\b\b\b\bdone\n");
         else
-                printk("\n");
+                printk(KERN_CONT "\n");
         swsusp_show_speed(&start, &stop, nr_to_write, "Wrote");
         return ret;
 }
diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c
index 6a07f4dbf2f8..5b3601bd1893 100644
--- a/kernel/power/swsusp.c
+++ b/kernel/power/swsusp.c
@@ -56,133 +56,3 @@
 #include "power.h"
 
 int in_suspend __nosavedata = 0;
-
-/**
- *      The following functions are used for tracing the allocated
- *      swap pages, so that they can be freed in case of an error.
- */
-
-struct swsusp_extent {
-        struct rb_node node;
-        unsigned long start;
-        unsigned long end;
-};
-
-static struct rb_root swsusp_extents = RB_ROOT;
-
-static int swsusp_extents_insert(unsigned long swap_offset)
-{
-        struct rb_node **new = &(swsusp_extents.rb_node);
-        struct rb_node *parent = NULL;
-        struct swsusp_extent *ext;
-
-        /* Figure out where to put the new node */
-        while (*new) {
-                ext = container_of(*new, struct swsusp_extent, node);
-                parent = *new;
-                if (swap_offset < ext->start) {
-                        /* Try to merge */
-                        if (swap_offset == ext->start - 1) {
-                                ext->start--;
-                                return 0;
-                        }
-                        new = &((*new)->rb_left);
-                } else if (swap_offset > ext->end) {
-                        /* Try to merge */
-                        if (swap_offset == ext->end + 1) {
-                                ext->end++;
-                                return 0;
-                        }
-                        new = &((*new)->rb_right);
-                } else {
-                        /* It already is in the tree */
-                        return -EINVAL;
-                }
-        }
-        /* Add the new node and rebalance the tree. */
-        ext = kzalloc(sizeof(struct swsusp_extent), GFP_KERNEL);
-        if (!ext)
-                return -ENOMEM;
-
-        ext->start = swap_offset;
-        ext->end = swap_offset;
-        rb_link_node(&ext->node, parent, new);
-        rb_insert_color(&ext->node, &swsusp_extents);
-        return 0;
-}
-
-/**
- *      alloc_swapdev_block - allocate a swap page and register that it has
- *      been allocated, so that it can be freed in case of an error.
- */
-
-sector_t alloc_swapdev_block(int swap)
-{
-        unsigned long offset;
-
-        offset = swp_offset(get_swap_page_of_type(swap));
-        if (offset) {
-                if (swsusp_extents_insert(offset))
-                        swap_free(swp_entry(swap, offset));
-                else
-                        return swapdev_block(swap, offset);
-        }
-        return 0;
-}
-
-/**
- *      free_all_swap_pages - free swap pages allocated for saving image data.
- *      It also frees the extents used to register which swap entres had been
- *      allocated.
- */
-
-void free_all_swap_pages(int swap)
-{
-        struct rb_node *node;
-
-        while ((node = swsusp_extents.rb_node)) {
-                struct swsusp_extent *ext;
-                unsigned long offset;
-
-                ext = container_of(node, struct swsusp_extent, node);
-                rb_erase(node, &swsusp_extents);
-                for (offset = ext->start; offset <= ext->end; offset++)
-                        swap_free(swp_entry(swap, offset));
-
-                kfree(ext);
-        }
-}
-
-int swsusp_swap_in_use(void)
-{
-        return (swsusp_extents.rb_node != NULL);
-}
-
-/**
- *      swsusp_show_speed - print the time elapsed between two events represented by
- *      @start and @stop
- *
- *      @nr_pages -     number of pages processed between @start and @stop
- *      @msg -          introductory message to print
- */
-
-void swsusp_show_speed(struct timeval *start, struct timeval *stop,
-                        unsigned nr_pages, char *msg)
-{
-        s64 elapsed_centisecs64;
-        int centisecs;
-        int k;
-        int kps;
-
-        elapsed_centisecs64 = timeval_to_ns(stop) - timeval_to_ns(start);
-        do_div(elapsed_centisecs64, NSEC_PER_SEC / 100);
-        centisecs = elapsed_centisecs64;
-        if (centisecs == 0)
-                centisecs = 1;  /* avoid div-by-zero */
-        k = nr_pages * (PAGE_SIZE / 1024);
-        kps = (k * 100) / centisecs;
-        printk(KERN_INFO "PM: %s %d kbytes in %d.%02d seconds (%d.%02d MB/s)\n",
-                        msg, k,
-                        centisecs / 100, centisecs % 100,
-                        kps / 1000, (kps % 1000) / 10);
-}
diff --git a/kernel/printk.c b/kernel/printk.c
index f38b07f78a4e..1ded8e7dd19b 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -33,6 +33,8 @@
 #include <linux/bootmem.h>
 #include <linux/syscalls.h>
 #include <linux/kexec.h>
+#include <linux/ratelimit.h>
+#include <linux/kmsg_dump.h>
 
 #include <asm/uaccess.h>
 
@@ -1376,11 +1378,11 @@ late_initcall(disable_boot_consoles);
  */
 DEFINE_RATELIMIT_STATE(printk_ratelimit_state, 5 * HZ, 10);
 
-int printk_ratelimit(void)
+int __printk_ratelimit(const char *func)
 {
-        return __ratelimit(&printk_ratelimit_state);
+        return ___ratelimit(&printk_ratelimit_state, func);
 }
-EXPORT_SYMBOL(printk_ratelimit);
+EXPORT_SYMBOL(__printk_ratelimit);
 
 /**
  * printk_timed_ratelimit - caller-controlled printk ratelimiting
@@ -1404,4 +1406,122 @@ bool printk_timed_ratelimit(unsigned long *caller_jiffies,
         return false;
 }
 EXPORT_SYMBOL(printk_timed_ratelimit);
+
+static DEFINE_SPINLOCK(dump_list_lock);
+static LIST_HEAD(dump_list);
+
+/**
+ * kmsg_dump_register - register a kernel log dumper.
+ * @dump: pointer to the kmsg_dumper structure
+ *
+ * Adds a kernel log dumper to the system. The dump callback in the
+ * structure will be called when the kernel oopses or panics and must be
+ * set. Returns zero on success and %-EINVAL or %-EBUSY otherwise.
+ */
+int kmsg_dump_register(struct kmsg_dumper *dumper)
+{
+        unsigned long flags;
+        int err = -EBUSY;
+
+        /* The dump callback needs to be set */
+        if (!dumper->dump)
+                return -EINVAL;
+
+        spin_lock_irqsave(&dump_list_lock, flags);
+        /* Don't allow registering multiple times */
+        if (!dumper->registered) {
+                dumper->registered = 1;
+                list_add_tail(&dumper->list, &dump_list);
+                err = 0;
+        }
+        spin_unlock_irqrestore(&dump_list_lock, flags);
+
+        return err;
+}
+EXPORT_SYMBOL_GPL(kmsg_dump_register);
+
+/**
+ * kmsg_dump_unregister - unregister a kmsg dumper.
+ * @dump: pointer to the kmsg_dumper structure
+ *
+ * Removes a dump device from the system. Returns zero on success and
+ * %-EINVAL otherwise.
+ */
+int kmsg_dump_unregister(struct kmsg_dumper *dumper)
+{
+        unsigned long flags;
+        int err = -EINVAL;
+
+        spin_lock_irqsave(&dump_list_lock, flags);
+        if (dumper->registered) {
+                dumper->registered = 0;
+                list_del(&dumper->list);
+                err = 0;
+        }
+        spin_unlock_irqrestore(&dump_list_lock, flags);
+
+        return err;
+}
+EXPORT_SYMBOL_GPL(kmsg_dump_unregister);
+
+static const char const *kmsg_reasons[] = {
+        [KMSG_DUMP_OOPS]        = "oops",
+        [KMSG_DUMP_PANIC]       = "panic",
+};
+
+static const char *kmsg_to_str(enum kmsg_dump_reason reason)
+{
+        if (reason >= ARRAY_SIZE(kmsg_reasons) || reason < 0)
+                return "unknown";
+
+        return kmsg_reasons[reason];
+}
+
+/**
+ * kmsg_dump - dump kernel log to kernel message dumpers.
+ * @reason: the reason (oops, panic etc) for dumping
+ *
+ * Iterate through each of the dump devices and call the oops/panic
+ * callbacks with the log buffer.
+ */
+void kmsg_dump(enum kmsg_dump_reason reason)
+{
+        unsigned long end;
+        unsigned chars;
+        struct kmsg_dumper *dumper;
+        const char *s1, *s2;
+        unsigned long l1, l2;
+        unsigned long flags;
+
+        /* Theoretically, the log could move on after we do this, but
+           there's not a lot we can do about that. The new messages
+           will overwrite the start of what we dump. */
+        spin_lock_irqsave(&logbuf_lock, flags);
+        end = log_end & LOG_BUF_MASK;
+        chars = logged_chars;
+        spin_unlock_irqrestore(&logbuf_lock, flags);
+
+        if (logged_chars > end) {
+                s1 = log_buf + log_buf_len - logged_chars + end;
+                l1 = logged_chars - end;
+
+                s2 = log_buf;
+                l2 = end;
+        } else {
+                s1 = "";
+                l1 = 0;
+
+                s2 = log_buf + end - logged_chars;
+                l2 = logged_chars;
+        }
+
+        if (!spin_trylock_irqsave(&dump_list_lock, flags)) {
+                printk(KERN_ERR "dump_kmsg: dump list lock is held during %s, skipping dump\n",
+                                kmsg_to_str(reason));
+                return;
+        }
+        list_for_each_entry(dumper, &dump_list, list)
+                dumper->dump(dumper, reason, s1, l1, s2, l2);
+        spin_unlock_irqrestore(&dump_list_lock, flags);
+}
 #endif
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index 400183346ad2..9b7fd4723878 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -44,7 +44,6 @@
 #include <linux/cpu.h>
 #include <linux/mutex.h>
 #include <linux/module.h>
-#include <linux/kernel_stat.h>
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 static struct lock_class_key rcu_lock_key;
@@ -53,8 +52,6 @@ struct lockdep_map rcu_lock_map =
 EXPORT_SYMBOL_GPL(rcu_lock_map);
 #endif
 
-int rcu_scheduler_active __read_mostly;
-
 /*
  * Awaken the corresponding synchronize_rcu() instance now that a
  * grace period has elapsed.
@@ -66,122 +63,3 @@ void wakeme_after_rcu(struct rcu_head  *head)
         rcu = container_of(head, struct rcu_synchronize, head);
         complete(&rcu->completion);
 }
-
-#ifdef CONFIG_TREE_PREEMPT_RCU
-
-/**
- * synchronize_rcu - wait until a grace period has elapsed.
- *
- * Control will return to the caller some time after a full grace
- * period has elapsed, in other words after all currently executing RCU
- * read-side critical sections have completed.  RCU read-side critical
- * sections are delimited by rcu_read_lock() and rcu_read_unlock(),
- * and may be nested.
- */
-void synchronize_rcu(void)
-{
-        struct rcu_synchronize rcu;
-
-        if (!rcu_scheduler_active)
-                return;
-
-        init_completion(&rcu.completion);
-        /* Will wake me after RCU finished. */
-        call_rcu(&rcu.head, wakeme_after_rcu);
-        /* Wait for it. */
-        wait_for_completion(&rcu.completion);
-}
-EXPORT_SYMBOL_GPL(synchronize_rcu);
-
-#endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */
-
-/**
- * synchronize_sched - wait until an rcu-sched grace period has elapsed.
- *
- * Control will return to the caller some time after a full rcu-sched
- * grace period has elapsed, in other words after all currently executing
- * rcu-sched read-side critical sections have completed.   These read-side
- * critical sections are delimited by rcu_read_lock_sched() and
- * rcu_read_unlock_sched(), and may be nested.  Note that preempt_disable(),
- * local_irq_disable(), and so on may be used in place of
- * rcu_read_lock_sched().
- *
- * This means that all preempt_disable code sequences, including NMI and
- * hardware-interrupt handlers, in progress on entry will have completed
- * before this primitive returns.  However, this does not guarantee that
- * softirq handlers will have completed, since in some kernels, these
- * handlers can run in process context, and can block.
- *
- * This primitive provides the guarantees made by the (now removed)
- * synchronize_kernel() API.  In contrast, synchronize_rcu() only
- * guarantees that rcu_read_lock() sections will have completed.
- * In "classic RCU", these two guarantees happen to be one and
- * the same, but can differ in realtime RCU implementations.
- */
-void synchronize_sched(void)
-{
-        struct rcu_synchronize rcu;
-
-        if (rcu_blocking_is_gp())
-                return;
-
-        init_completion(&rcu.completion);
-        /* Will wake me after RCU finished. */
-        call_rcu_sched(&rcu.head, wakeme_after_rcu);
-        /* Wait for it. */
-        wait_for_completion(&rcu.completion);
-}
-EXPORT_SYMBOL_GPL(synchronize_sched);
-
-/**
- * synchronize_rcu_bh - wait until an rcu_bh grace period has elapsed.
- *
- * Control will return to the caller some time after a full rcu_bh grace
- * period has elapsed, in other words after all currently executing rcu_bh
- * read-side critical sections have completed.  RCU read-side critical
- * sections are delimited by rcu_read_lock_bh() and rcu_read_unlock_bh(),
- * and may be nested.
- */
-void synchronize_rcu_bh(void)
-{
-        struct rcu_synchronize rcu;
-
-        if (rcu_blocking_is_gp())
-                return;
-
-        init_completion(&rcu.completion);
-        /* Will wake me after RCU finished. */
-        call_rcu_bh(&rcu.head, wakeme_after_rcu);
-        /* Wait for it. */
-        wait_for_completion(&rcu.completion);
-}
-EXPORT_SYMBOL_GPL(synchronize_rcu_bh);
-
-static int __cpuinit rcu_barrier_cpu_hotplug(struct notifier_block *self,
-                unsigned long action, void *hcpu)
-{
-        return rcu_cpu_notify(self, action, hcpu);
-}
-
-void __init rcu_init(void)
-{
-        int i;
-
-        __rcu_init();
-        cpu_notifier(rcu_barrier_cpu_hotplug, 0);
-
-        /*
-         * We don't need protection against CPU-hotplug here because
-         * this is called early in boot, before either interrupts
-         * or the scheduler are operational.
-         */
-        for_each_online_cpu(i)
-                rcu_barrier_cpu_hotplug(NULL, CPU_UP_PREPARE, (void *)(long)i);
-}
-
-void rcu_scheduler_starting(void)
-{
-        WARN_ON(num_online_cpus() != 1);
-        WARN_ON(nr_context_switches() > 0);
-        rcu_scheduler_active = 1;
-}
diff --git a/kernel/rcutiny.c b/kernel/rcutiny.c
new file mode 100644
index 000000000000..9f6d9ff2572c
--- /dev/null
+++ b/kernel/rcutiny.c
@@ -0,0 +1,282 @@
+/*
+ * Read-Copy Update mechanism for mutual exclusion, the Bloatwatch edition.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright IBM Corporation, 2008
+ *
+ * Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
+ *
+ * For detailed explanation of Read-Copy Update mechanism see -
+ *              Documentation/RCU
+ */
+#include <linux/moduleparam.h>
+#include <linux/completion.h>
+#include <linux/interrupt.h>
+#include <linux/notifier.h>
+#include <linux/rcupdate.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/time.h>
+#include <linux/cpu.h>
+
+/* Global control variables for rcupdate callback mechanism. */
+struct rcu_ctrlblk {
+        struct rcu_head *rcucblist;     /* List of pending callbacks (CBs). */
+        struct rcu_head **donetail;     /* ->next pointer of last "done" CB. */
+        struct rcu_head **curtail;      /* ->next pointer of last CB. */
+};
+
+/* Definition for rcupdate control block. */
+static struct rcu_ctrlblk rcu_ctrlblk = {
+        .donetail       = &rcu_ctrlblk.rcucblist,
+        .curtail        = &rcu_ctrlblk.rcucblist,
+};
+
+static struct rcu_ctrlblk rcu_bh_ctrlblk = {
+        .donetail       = &rcu_bh_ctrlblk.rcucblist,
+        .curtail        = &rcu_bh_ctrlblk.rcucblist,
+};
+
+#ifdef CONFIG_NO_HZ
+
+static long rcu_dynticks_nesting = 1;
+
+/*
+ * Enter dynticks-idle mode, which is an extended quiescent state
+ * if we have fully entered that mode (i.e., if the new value of
+ * dynticks_nesting is zero).
+ */
+void rcu_enter_nohz(void)
+{
+        if (--rcu_dynticks_nesting == 0)
+                rcu_sched_qs(0); /* implies rcu_bh_qsctr_inc(0) */
+}
+
+/*
+ * Exit dynticks-idle mode, so that we are no longer in an extended
+ * quiescent state.
+ */
+void rcu_exit_nohz(void)
+{
+        rcu_dynticks_nesting++;
+}
+
+#endif /* #ifdef CONFIG_NO_HZ */
+
+/*
+ * Helper function for rcu_qsctr_inc() and rcu_bh_qsctr_inc().
+ * Also disable irqs to avoid confusion due to interrupt handlers
+ * invoking call_rcu().
+ */
+static int rcu_qsctr_help(struct rcu_ctrlblk *rcp)
+{
+        unsigned long flags;
+
+        local_irq_save(flags);
+        if (rcp->rcucblist != NULL &&
+            rcp->donetail != rcp->curtail) {
+                rcp->donetail = rcp->curtail;
+                local_irq_restore(flags);
+                return 1;
+        }
+        local_irq_restore(flags);
+
+        return 0;
+}
+
+/*
+ * Record an rcu quiescent state.  And an rcu_bh quiescent state while we
+ * are at it, given that any rcu quiescent state is also an rcu_bh
+ * quiescent state.  Use "+" instead of "||" to defeat short circuiting.
+ */
+void rcu_sched_qs(int cpu)
+{
+        if (rcu_qsctr_help(&rcu_ctrlblk) + rcu_qsctr_help(&rcu_bh_ctrlblk))
+                raise_softirq(RCU_SOFTIRQ);
+}
+
+/*
+ * Record an rcu_bh quiescent state.
+ */
+void rcu_bh_qs(int cpu)
+{
+        if (rcu_qsctr_help(&rcu_bh_ctrlblk))
+                raise_softirq(RCU_SOFTIRQ);
+}
+
+/*
+ * Check to see if the scheduling-clock interrupt came from an extended
+ * quiescent state, and, if so, tell RCU about it.
+ */
+void rcu_check_callbacks(int cpu, int user)
+{
+        if (user ||
+            (idle_cpu(cpu) &&
+             !in_softirq() &&
+             hardirq_count() <= (1 << HARDIRQ_SHIFT)))
+                rcu_sched_qs(cpu);
+        else if (!in_softirq())
+                rcu_bh_qs(cpu);
+}
+
+/*
+ * Helper function for rcu_process_callbacks() that operates on the
+ * specified rcu_ctrlkblk structure.
+ */
+static void __rcu_process_callbacks(struct rcu_ctrlblk *rcp)
+{
+        struct rcu_head *next, *list;
+        unsigned long flags;
+
+        /* If no RCU callbacks ready to invoke, just return. */
+        if (&rcp->rcucblist == rcp->donetail)
+                return;
+
+        /* Move the ready-to-invoke callbacks to a local list. */
+        local_irq_save(flags);
+        list = rcp->rcucblist;
+        rcp->rcucblist = *rcp->donetail;
+        *rcp->donetail = NULL;
+        if (rcp->curtail == rcp->donetail)
+                rcp->curtail = &rcp->rcucblist;
+        rcp->donetail = &rcp->rcucblist;
+        local_irq_restore(flags);
+
+        /* Invoke the callbacks on the local list. */
+        while (list) {
+                next = list->next;
+                prefetch(next);
+                list->func(list);
+                list = next;
+        }
+}
+
+/*
+ * Invoke any callbacks whose grace period has completed.
+ */
+static void rcu_process_callbacks(struct softirq_action *unused)
+{
+        __rcu_process_callbacks(&rcu_ctrlblk);
+        __rcu_process_callbacks(&rcu_bh_ctrlblk);
+}
+
+/*
+ * Wait for a grace period to elapse.  But it is illegal to invoke
+ * synchronize_sched() from within an RCU read-side critical section.
+ * Therefore, any legal call to synchronize_sched() is a quiescent
+ * state, and so on a UP system, synchronize_sched() need do nothing.
+ * Ditto for synchronize_rcu_bh().  (But Lai Jiangshan points out the
+ * benefits of doing might_sleep() to reduce latency.)
+ *
+ * Cool, huh?  (Due to Josh Triplett.)
+ *
+ * But we want to make this a static inline later.
+ */
+void synchronize_sched(void)
+{
+        cond_resched();
+}
+EXPORT_SYMBOL_GPL(synchronize_sched);
+
+void synchronize_rcu_bh(void)
+{
+        synchronize_sched();
+}
+EXPORT_SYMBOL_GPL(synchronize_rcu_bh);
+
+/*
+ * Helper function for call_rcu() and call_rcu_bh().
+ */
+static void __call_rcu(struct rcu_head *head,
+                       void (*func)(struct rcu_head *rcu),
+                       struct rcu_ctrlblk *rcp)
+{
+        unsigned long flags;
+
+        head->func = func;
+        head->next = NULL;
+
+        local_irq_save(flags);
+        *rcp->curtail = head;
+        rcp->curtail = &head->next;
+        local_irq_restore(flags);
+}
+
+/*
+ * Post an RCU callback to be invoked after the end of an RCU grace
+ * period.  But since we have but one CPU, that would be after any
+ * quiescent state.
+ */
+void call_rcu(struct rcu_head *head, void (*func)(struct rcu_head *rcu))
+{
+        __call_rcu(head, func, &rcu_ctrlblk);
+}
+EXPORT_SYMBOL_GPL(call_rcu);
+
+/*
+ * Post an RCU bottom-half callback to be invoked after any subsequent
+ * quiescent state.
+ */
+void call_rcu_bh(struct rcu_head *head, void (*func)(struct rcu_head *rcu))
+{
+        __call_rcu(head, func, &rcu_bh_ctrlblk);
+}
+EXPORT_SYMBOL_GPL(call_rcu_bh);
+
+void rcu_barrier(void)
+{
+        struct rcu_synchronize rcu;
+
+        init_completion(&rcu.completion);
+        /* Will wake me after RCU finished. */
+        call_rcu(&rcu.head, wakeme_after_rcu);
+        /* Wait for it. */
+        wait_for_completion(&rcu.completion);
+}
+EXPORT_SYMBOL_GPL(rcu_barrier);
+
+void rcu_barrier_bh(void)
+{
+        struct rcu_synchronize rcu;
+
+        init_completion(&rcu.completion);
+        /* Will wake me after RCU finished. */
+        call_rcu_bh(&rcu.head, wakeme_after_rcu);
+        /* Wait for it. */
+        wait_for_completion(&rcu.completion);
+}
+EXPORT_SYMBOL_GPL(rcu_barrier_bh);
+
+void rcu_barrier_sched(void)
+{
+        struct rcu_synchronize rcu;
+
+        init_completion(&rcu.completion);
+        /* Will wake me after RCU finished. */
+        call_rcu_sched(&rcu.head, wakeme_after_rcu);
+        /* Wait for it. */
+        wait_for_completion(&rcu.completion);
+}
+EXPORT_SYMBOL_GPL(rcu_barrier_sched);
+
+void __init rcu_init(void)
+{
+        open_softirq(RCU_SOFTIRQ, rcu_process_callbacks);
+}
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index 697c0a0229d4..9bb52177af02 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -327,6 +327,11 @@ rcu_torture_cb(struct rcu_head *p)
                 cur_ops->deferred_free(rp);
 }
 
+static int rcu_no_completed(void)
+{
+        return 0;
+}
+
 static void rcu_torture_deferred_free(struct rcu_torture *p)
 {
         call_rcu(&p->rtort_rcu, rcu_torture_cb);
@@ -388,6 +393,21 @@ static struct rcu_torture_ops rcu_sync_ops = {
         .name           = "rcu_sync"
 };
 
+static struct rcu_torture_ops rcu_expedited_ops = {
+        .init           = rcu_sync_torture_init,
+        .cleanup        = NULL,
+        .readlock       = rcu_torture_read_lock,
+        .read_delay     = rcu_read_delay,  /* just reuse rcu's version. */
+        .readunlock     = rcu_torture_read_unlock,
+        .completed      = rcu_no_completed,
+        .deferred_free  = rcu_sync_torture_deferred_free,
+        .sync           = synchronize_rcu_expedited,
+        .cb_barrier     = NULL,
+        .stats          = NULL,
+        .irq_capable    = 1,
+        .name           = "rcu_expedited"
+};
+
 /*
  * Definitions for rcu_bh torture testing.
  */
@@ -547,6 +567,25 @@ static struct rcu_torture_ops srcu_ops = {
         .name           = "srcu"
 };
 
+static void srcu_torture_synchronize_expedited(void)
+{
+        synchronize_srcu_expedited(&srcu_ctl);
+}
+
+static struct rcu_torture_ops srcu_expedited_ops = {
+        .init           = srcu_torture_init,
+        .cleanup        = srcu_torture_cleanup,
+        .readlock       = srcu_torture_read_lock,
+        .read_delay     = srcu_read_delay,
+        .readunlock     = srcu_torture_read_unlock,
+        .completed      = srcu_torture_completed,
+        .deferred_free  = rcu_sync_torture_deferred_free,
+        .sync           = srcu_torture_synchronize_expedited,
+        .cb_barrier     = NULL,
+        .stats          = srcu_torture_stats,
+        .name           = "srcu_expedited"
+};
+
 /*
  * Definitions for sched torture testing.
  */
@@ -562,11 +601,6 @@ static void sched_torture_read_unlock(int idx)
         preempt_enable();
 }
 
-static int sched_torture_completed(void)
-{
-        return 0;
-}
-
 static void rcu_sched_torture_deferred_free(struct rcu_torture *p)
 {
         call_rcu_sched(&p->rtort_rcu, rcu_torture_cb);
@@ -583,7 +617,7 @@ static struct rcu_torture_ops sched_ops = {
         .readlock       = sched_torture_read_lock,
         .read_delay     = rcu_read_delay,  /* just reuse rcu's version. */
         .readunlock     = sched_torture_read_unlock,
-        .completed      = sched_torture_completed,
+        .completed      = rcu_no_completed,
         .deferred_free  = rcu_sched_torture_deferred_free,
         .sync           = sched_torture_synchronize,
         .cb_barrier     = rcu_barrier_sched,
@@ -592,13 +626,13 @@ static struct rcu_torture_ops sched_ops = {
         .name           = "sched"
 };
 
-static struct rcu_torture_ops sched_ops_sync = {
+static struct rcu_torture_ops sched_sync_ops = {
         .init           = rcu_sync_torture_init,
         .cleanup        = NULL,
         .readlock       = sched_torture_read_lock,
         .read_delay     = rcu_read_delay,  /* just reuse rcu's version. */
         .readunlock     = sched_torture_read_unlock,
-        .completed      = sched_torture_completed,
+        .completed      = rcu_no_completed,
         .deferred_free  = rcu_sync_torture_deferred_free,
         .sync           = sched_torture_synchronize,
         .cb_barrier     = NULL,
@@ -612,7 +646,7 @@ static struct rcu_torture_ops sched_expedited_ops = {
         .readlock       = sched_torture_read_lock,
         .read_delay     = rcu_read_delay,  /* just reuse rcu's version. */
         .readunlock     = sched_torture_read_unlock,
-        .completed      = sched_torture_completed,
+        .completed      = rcu_no_completed,
         .deferred_free  = rcu_sync_torture_deferred_free,
         .sync           = synchronize_sched_expedited,
         .cb_barrier     = NULL,
@@ -729,13 +763,13 @@ static void rcu_torture_timer(unsigned long unused)
                 /* Should not happen, but... */
                 pipe_count = RCU_TORTURE_PIPE_LEN;
         }
-        ++__get_cpu_var(rcu_torture_count)[pipe_count];
+        __this_cpu_inc(per_cpu_var(rcu_torture_count)[pipe_count]);
         completed = cur_ops->completed() - completed;
         if (completed > RCU_TORTURE_PIPE_LEN) {
                 /* Should not happen, but... */
                 completed = RCU_TORTURE_PIPE_LEN;
         }
-        ++__get_cpu_var(rcu_torture_batch)[completed];
+        __this_cpu_inc(per_cpu_var(rcu_torture_batch)[completed]);
         preempt_enable();
         cur_ops->readunlock(idx);
 }
@@ -784,13 +818,13 @@ rcu_torture_reader(void *arg)
                         /* Should not happen, but... */
                         pipe_count = RCU_TORTURE_PIPE_LEN;
                 }
-                ++__get_cpu_var(rcu_torture_count)[pipe_count];
+                __this_cpu_inc(per_cpu_var(rcu_torture_count)[pipe_count]);
                 completed = cur_ops->completed() - completed;
                 if (completed > RCU_TORTURE_PIPE_LEN) {
                         /* Should not happen, but... */
                         completed = RCU_TORTURE_PIPE_LEN;
                 }
-                ++__get_cpu_var(rcu_torture_batch)[completed];
+                __this_cpu_inc(per_cpu_var(rcu_torture_batch)[completed]);
                 preempt_enable();
                 cur_ops->readunlock(idx);
                 schedule();
@@ -1097,9 +1131,10 @@ rcu_torture_init(void)
         int cpu;
         int firsterr = 0;
         static struct rcu_torture_ops *torture_ops[] =
-                { &rcu_ops, &rcu_sync_ops, &rcu_bh_ops, &rcu_bh_sync_ops,
-                  &sched_expedited_ops,
-                  &srcu_ops, &sched_ops, &sched_ops_sync, };
+                { &rcu_ops, &rcu_sync_ops, &rcu_expedited_ops,
+                  &rcu_bh_ops, &rcu_bh_sync_ops,
+                  &srcu_ops, &srcu_expedited_ops,
+                  &sched_ops, &sched_sync_ops, &sched_expedited_ops, };
 
         mutex_lock(&fullstop_mutex);
 
@@ -1110,8 +1145,12 @@ rcu_torture_init(void)
                         break;
         }
         if (i == ARRAY_SIZE(torture_ops)) {
-                printk(KERN_ALERT "rcutorture: invalid torture type: \"%s\"\n",
+                printk(KERN_ALERT "rcu-torture: invalid torture type: \"%s\"\n",
                        torture_type);
+                printk(KERN_ALERT "rcu-torture types:");
+                for (i = 0; i < ARRAY_SIZE(torture_ops); i++)
+                        printk(KERN_ALERT " %s", torture_ops[i]->name);
+                printk(KERN_ALERT "\n");
                 mutex_unlock(&fullstop_mutex);
                 return -EINVAL;
         }
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index f3077c0ab181..53ae9598f798 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -46,18 +46,22 @@
 #include <linux/cpu.h>
 #include <linux/mutex.h>
 #include <linux/time.h>
+#include <linux/kernel_stat.h>
 
 #include "rcutree.h"
 
 /* Data structures. */
 
+static struct lock_class_key rcu_node_class[NUM_RCU_LVLS];
+
 #define RCU_STATE_INITIALIZER(name) { \
         .level = { &name.node[0] }, \
         .levelcnt = { \
                 NUM_RCU_LVL_0,  /* root of hierarchy. */ \
                 NUM_RCU_LVL_1, \
                 NUM_RCU_LVL_2, \
-                NUM_RCU_LVL_3, /* == MAX_RCU_LVLS */ \
+                NUM_RCU_LVL_3, \
+                NUM_RCU_LVL_4, /* == MAX_RCU_LVLS */ \
         }, \
         .signaled = RCU_GP_IDLE, \
         .gpnum = -300, \
@@ -77,6 +81,8 @@ DEFINE_PER_CPU(struct rcu_data, rcu_sched_data);
 struct rcu_state rcu_bh_state = RCU_STATE_INITIALIZER(rcu_bh_state);
 DEFINE_PER_CPU(struct rcu_data, rcu_bh_data);
 
+static int rcu_scheduler_active __read_mostly;
+
 
 /*
  * Return true if an RCU grace period is in progress.  The ACCESS_ONCE()s
@@ -98,7 +104,7 @@ void rcu_sched_qs(int cpu)
         struct rcu_data *rdp;
 
         rdp = &per_cpu(rcu_sched_data, cpu);
-        rdp->passed_quiesc_completed = rdp->completed;
+        rdp->passed_quiesc_completed = rdp->gpnum - 1;
         barrier();
         rdp->passed_quiesc = 1;
         rcu_preempt_note_context_switch(cpu);
@@ -109,7 +115,7 @@ void rcu_bh_qs(int cpu)
         struct rcu_data *rdp;
 
         rdp = &per_cpu(rcu_bh_data, cpu);
-        rdp->passed_quiesc_completed = rdp->completed;
+        rdp->passed_quiesc_completed = rdp->gpnum - 1;
         barrier();
         rdp->passed_quiesc = 1;
 }
@@ -335,28 +341,9 @@ void rcu_irq_exit(void)
                 set_need_resched();
 }
 
-/*
- * Record the specified "completed" value, which is later used to validate
- * dynticks counter manipulations.  Specify "rsp->completed - 1" to
- * unconditionally invalidate any future dynticks manipulations (which is
- * useful at the beginning of a grace period).
- */
-static void dyntick_record_completed(struct rcu_state *rsp, long comp)
-{
-        rsp->dynticks_completed = comp;
-}
-
 #ifdef CONFIG_SMP
 
 /*
- * Recall the previously recorded value of the completion for dynticks.
- */
-static long dyntick_recall_completed(struct rcu_state *rsp)
-{
-        return rsp->dynticks_completed;
-}
-
-/*
  * Snapshot the specified CPU's dynticks counter so that we can later
  * credit them with an implicit quiescent state.  Return 1 if this CPU
  * is in dynticks idle mode, which is an extended quiescent state.
@@ -419,24 +406,8 @@ static int rcu_implicit_dynticks_qs(struct rcu_data *rdp)
 
 #else /* #ifdef CONFIG_NO_HZ */
 
-static void dyntick_record_completed(struct rcu_state *rsp, long comp)
-{
-}
-
 #ifdef CONFIG_SMP
 
-/*
- * If there are no dynticks, then the only way that a CPU can passively
- * be in a quiescent state is to be offline.  Unlike dynticks idle, which
- * is a point in time during the prior (already finished) grace period,
- * an offline CPU is always in a quiescent state, and thus can be
- * unconditionally applied.  So just return the current value of completed.
- */
-static long dyntick_recall_completed(struct rcu_state *rsp)
-{
-        return rsp->completed;
-}
-
 static int dyntick_save_progress_counter(struct rcu_data *rdp)
 {
         return 0;
@@ -553,13 +524,33 @@ static void check_cpu_stall(struct rcu_state *rsp, struct rcu_data *rdp)
 /*
  * Update CPU-local rcu_data state to record the newly noticed grace period.
  * This is used both when we started the grace period and when we notice
- * that someone else started the grace period.
+ * that someone else started the grace period.  The caller must hold the
+ * ->lock of the leaf rcu_node structure corresponding to the current CPU,
+ *  and must have irqs disabled.
  */
+static void __note_new_gpnum(struct rcu_state *rsp, struct rcu_node *rnp, struct rcu_data *rdp)
+{
+        if (rdp->gpnum != rnp->gpnum) {
+                rdp->qs_pending = 1;
+                rdp->passed_quiesc = 0;
+                rdp->gpnum = rnp->gpnum;
+        }
+}
+
 static void note_new_gpnum(struct rcu_state *rsp, struct rcu_data *rdp)
 {
-        rdp->qs_pending = 1;
-        rdp->passed_quiesc = 0;
-        rdp->gpnum = rsp->gpnum;
+        unsigned long flags;
+        struct rcu_node *rnp;
+
+        local_irq_save(flags);
+        rnp = rdp->mynode;
+        if (rdp->gpnum == ACCESS_ONCE(rnp->gpnum) || /* outside lock. */
+            !spin_trylock(&rnp->lock)) { /* irqs already off, retry later. */
+                local_irq_restore(flags);
+                return;
+        }
+        __note_new_gpnum(rsp, rnp, rdp);
+        spin_unlock_irqrestore(&rnp->lock, flags);
 }
 
 /*
@@ -583,6 +574,79 @@ check_for_new_grace_period(struct rcu_state *rsp, struct rcu_data *rdp)
 }
 
 /*
+ * Advance this CPU's callbacks, but only if the current grace period
+ * has ended.  This may be called only from the CPU to whom the rdp
+ * belongs.  In addition, the corresponding leaf rcu_node structure's
+ * ->lock must be held by the caller, with irqs disabled.
+ */
+static void
+__rcu_process_gp_end(struct rcu_state *rsp, struct rcu_node *rnp, struct rcu_data *rdp)
+{
+        /* Did another grace period end? */
+        if (rdp->completed != rnp->completed) {
+
+                /* Advance callbacks.  No harm if list empty. */
+                rdp->nxttail[RCU_DONE_TAIL] = rdp->nxttail[RCU_WAIT_TAIL];
+                rdp->nxttail[RCU_WAIT_TAIL] = rdp->nxttail[RCU_NEXT_READY_TAIL];
+                rdp->nxttail[RCU_NEXT_READY_TAIL] = rdp->nxttail[RCU_NEXT_TAIL];
+
+                /* Remember that we saw this grace-period completion. */
+                rdp->completed = rnp->completed;
+        }
+}
+
+/*
+ * Advance this CPU's callbacks, but only if the current grace period
+ * has ended.  This may be called only from the CPU to whom the rdp
+ * belongs.
+ */
+static void
+rcu_process_gp_end(struct rcu_state *rsp, struct rcu_data *rdp)
+{
+        unsigned long flags;
+        struct rcu_node *rnp;
+
+        local_irq_save(flags);
+        rnp = rdp->mynode;
+        if (rdp->completed == ACCESS_ONCE(rnp->completed) || /* outside lock. */
+            !spin_trylock(&rnp->lock)) { /* irqs already off, retry later. */
+                local_irq_restore(flags);
+                return;
+        }
+        __rcu_process_gp_end(rsp, rnp, rdp);
+        spin_unlock_irqrestore(&rnp->lock, flags);
+}
+
+/*
+ * Do per-CPU grace-period initialization for running CPU.  The caller
+ * must hold the lock of the leaf rcu_node structure corresponding to
+ * this CPU.
+ */
+static void
+rcu_start_gp_per_cpu(struct rcu_state *rsp, struct rcu_node *rnp, struct rcu_data *rdp)
+{
+        /* Prior grace period ended, so advance callbacks for current CPU. */
+        __rcu_process_gp_end(rsp, rnp, rdp);
+
+        /*
+         * Because this CPU just now started the new grace period, we know
+         * that all of its callbacks will be covered by this upcoming grace
+         * period, even the ones that were registered arbitrarily recently.
+         * Therefore, advance all outstanding callbacks to RCU_WAIT_TAIL.
+         *
+         * Other CPUs cannot be sure exactly when the grace period started.
+         * Therefore, their recently registered callbacks must pass through
+         * an additional RCU_NEXT_READY stage, so that they will be handled
+         * by the next RCU grace period.
+         */
+        rdp->nxttail[RCU_NEXT_READY_TAIL] = rdp->nxttail[RCU_NEXT_TAIL];
+        rdp->nxttail[RCU_WAIT_TAIL] = rdp->nxttail[RCU_NEXT_TAIL];
+
+        /* Set state so that this CPU will detect the next quiescent state. */
+        __note_new_gpnum(rsp, rnp, rdp);
+}
+
+/*
  * Start a new RCU grace period if warranted, re-initializing the hierarchy
  * in preparation for detecting the next grace period.  The caller must hold
  * the root node's ->lock, which is released before return.  Hard irqs must
@@ -596,7 +660,23 @@ rcu_start_gp(struct rcu_state *rsp, unsigned long flags)
         struct rcu_node *rnp = rcu_get_root(rsp);
 
         if (!cpu_needs_another_gp(rsp, rdp)) {
-                spin_unlock_irqrestore(&rnp->lock, flags);
+                if (rnp->completed == rsp->completed) {
+                        spin_unlock_irqrestore(&rnp->lock, flags);
+                        return;
+                }
+                spin_unlock(&rnp->lock);         /* irqs remain disabled. */
+
+                /*
+                 * Propagate new ->completed value to rcu_node structures
+                 * so that other CPUs don't have to wait until the start
+                 * of the next grace period to process their callbacks.
+                 */
+                rcu_for_each_node_breadth_first(rsp, rnp) {
+                        spin_lock(&rnp->lock);   /* irqs already disabled. */
+                        rnp->completed = rsp->completed;
+                        spin_unlock(&rnp->lock); /* irqs remain disabled. */
+                }
+                local_irq_restore(flags);
                 return;
         }
 
@@ -606,29 +686,15 @@ rcu_start_gp(struct rcu_state *rsp, unsigned long flags)
         rsp->signaled = RCU_GP_INIT; /* Hold off force_quiescent_state. */
         rsp->jiffies_force_qs = jiffies + RCU_JIFFIES_TILL_FORCE_QS;
         record_gp_stall_check_time(rsp);
-        dyntick_record_completed(rsp, rsp->completed - 1);
-        note_new_gpnum(rsp, rdp);
-
-        /*
-         * Because this CPU just now started the new grace period, we know
-         * that all of its callbacks will be covered by this upcoming grace
-         * period, even the ones that were registered arbitrarily recently.
-         * Therefore, advance all outstanding callbacks to RCU_WAIT_TAIL.
-         *
-         * Other CPUs cannot be sure exactly when the grace period started.
-         * Therefore, their recently registered callbacks must pass through
-         * an additional RCU_NEXT_READY stage, so that they will be handled
-         * by the next RCU grace period.
-         */
-        rdp->nxttail[RCU_NEXT_READY_TAIL] = rdp->nxttail[RCU_NEXT_TAIL];
-        rdp->nxttail[RCU_WAIT_TAIL] = rdp->nxttail[RCU_NEXT_TAIL];
 
         /* Special-case the common single-level case. */
         if (NUM_RCU_NODES == 1) {
                 rcu_preempt_check_blocked_tasks(rnp);
                 rnp->qsmask = rnp->qsmaskinit;
                 rnp->gpnum = rsp->gpnum;
+                rnp->completed = rsp->completed;
                 rsp->signaled = RCU_SIGNAL_INIT; /* force_quiescent_state OK. */
+                rcu_start_gp_per_cpu(rsp, rnp, rdp);
                 spin_unlock_irqrestore(&rnp->lock, flags);
                 return;
         }
@@ -661,6 +727,9 @@ rcu_start_gp(struct rcu_state *rsp, unsigned long flags)
                 rcu_preempt_check_blocked_tasks(rnp);
                 rnp->qsmask = rnp->qsmaskinit;
                 rnp->gpnum = rsp->gpnum;
+                rnp->completed = rsp->completed;
+                if (rnp == rdp->mynode)
+                        rcu_start_gp_per_cpu(rsp, rnp, rdp);
                 spin_unlock(&rnp->lock);        /* irqs remain disabled. */
         }
 
@@ -672,58 +741,32 @@ rcu_start_gp(struct rcu_state *rsp, unsigned long flags)
 }
 
 /*
- * Advance this CPU's callbacks, but only if the current grace period
- * has ended.  This may be called only from the CPU to whom the rdp
- * belongs.
+ * Report a full set of quiescent states to the specified rcu_state
+ * data structure.  This involves cleaning up after the prior grace
+ * period and letting rcu_start_gp() start up the next grace period
+ * if one is needed.  Note that the caller must hold rnp->lock, as
+ * required by rcu_start_gp(), which will release it.
  */
-static void
-rcu_process_gp_end(struct rcu_state *rsp, struct rcu_data *rdp)
-{
-        long completed_snap;
-        unsigned long flags;
-
-        local_irq_save(flags);
-        completed_snap = ACCESS_ONCE(rsp->completed);  /* outside of lock. */
-
-        /* Did another grace period end? */
-        if (rdp->completed != completed_snap) {
-
-                /* Advance callbacks.  No harm if list empty. */
-                rdp->nxttail[RCU_DONE_TAIL] = rdp->nxttail[RCU_WAIT_TAIL];
-                rdp->nxttail[RCU_WAIT_TAIL] = rdp->nxttail[RCU_NEXT_READY_TAIL];
-                rdp->nxttail[RCU_NEXT_READY_TAIL] = rdp->nxttail[RCU_NEXT_TAIL];
-
-                /* Remember that we saw this grace-period completion. */
-                rdp->completed = completed_snap;
-        }
-        local_irq_restore(flags);
-}
-
-/*
- * Clean up after the prior grace period and let rcu_start_gp() start up
- * the next grace period if one is needed.  Note that the caller must
- * hold rnp->lock, as required by rcu_start_gp(), which will release it.
- */
-static void cpu_quiet_msk_finish(struct rcu_state *rsp, unsigned long flags)
+static void rcu_report_qs_rsp(struct rcu_state *rsp, unsigned long flags)
         __releases(rcu_get_root(rsp)->lock)
 {
         WARN_ON_ONCE(!rcu_gp_in_progress(rsp));
         rsp->completed = rsp->gpnum;
         rsp->signaled = RCU_GP_IDLE;
-        rcu_process_gp_end(rsp, rsp->rda[smp_processor_id()]);
         rcu_start_gp(rsp, flags);  /* releases root node's rnp->lock. */
 }
 
 /*
- * Similar to cpu_quiet(), for which it is a helper function.  Allows
- * a group of CPUs to be quieted at one go, though all the CPUs in the
- * group must be represented by the same leaf rcu_node structure.
- * That structure's lock must be held upon entry, and it is released
- * before return.
+ * Similar to rcu_report_qs_rdp(), for which it is a helper function.
+ * Allows quiescent states for a group of CPUs to be reported at one go
+ * to the specified rcu_node structure, though all the CPUs in the group
+ * must be represented by the same rcu_node structure (which need not be
+ * a leaf rcu_node structure, though it often will be).  That structure's
+ * lock must be held upon entry, and it is released before return.
  */
 static void
-cpu_quiet_msk(unsigned long mask, struct rcu_state *rsp, struct rcu_node *rnp,
-              unsigned long flags)
+rcu_report_qs_rnp(unsigned long mask, struct rcu_state *rsp,
+                  struct rcu_node *rnp, unsigned long flags)
         __releases(rnp->lock)
 {
         struct rcu_node *rnp_c;
@@ -759,21 +802,23 @@ cpu_quiet_msk(unsigned long mask, struct rcu_state *rsp, struct rcu_node *rnp,
 
         /*
          * Get here if we are the last CPU to pass through a quiescent
-         * state for this grace period.  Invoke cpu_quiet_msk_finish()
+         * state for this grace period.  Invoke rcu_report_qs_rsp()
          * to clean up and start the next grace period if one is needed.
          */
-        cpu_quiet_msk_finish(rsp, flags); /* releases rnp->lock. */
+        rcu_report_qs_rsp(rsp, flags); /* releases rnp->lock. */
 }
 
 /*
- * Record a quiescent state for the specified CPU, which must either be
- * the current CPU.  The lastcomp argument is used to make sure we are
- * still in the grace period of interest.  We don't want to end the current
- * grace period based on quiescent states detected in an earlier grace
- * period!
+ * Record a quiescent state for the specified CPU to that CPU's rcu_data
+ * structure.  This must be either called from the specified CPU, or
+ * called when the specified CPU is known to be offline (and when it is
+ * also known that no other CPU is concurrently trying to help the offline
+ * CPU).  The lastcomp argument is used to make sure we are still in the
+ * grace period of interest.  We don't want to end the current grace period
+ * based on quiescent states detected in an earlier grace period!
  */
 static void
-cpu_quiet(int cpu, struct rcu_state *rsp, struct rcu_data *rdp, long lastcomp)
+rcu_report_qs_rdp(int cpu, struct rcu_state *rsp, struct rcu_data *rdp, long lastcomp)
 {
         unsigned long flags;
         unsigned long mask;
@@ -781,15 +826,15 @@ cpu_quiet(int cpu, struct rcu_state *rsp, struct rcu_data *rdp, long lastcomp)
 
         rnp = rdp->mynode;
         spin_lock_irqsave(&rnp->lock, flags);
-        if (lastcomp != ACCESS_ONCE(rsp->completed)) {
+        if (lastcomp != rnp->completed) {
 
                 /*
                  * Someone beat us to it for this grace period, so leave.
                  * The race with GP start is resolved by the fact that we
                  * hold the leaf rcu_node lock, so that the per-CPU bits
                  * cannot yet be initialized -- so we would simply find our
-                 * CPU's bit already cleared in cpu_quiet_msk() if this race
-                 * occurred.
+                 * CPU's bit already cleared in rcu_report_qs_rnp() if this
+                 * race occurred.
                  */
                 rdp->passed_quiesc = 0; /* try again later! */
                 spin_unlock_irqrestore(&rnp->lock, flags);
@@ -807,7 +852,7 @@ cpu_quiet(int cpu, struct rcu_state *rsp, struct rcu_data *rdp, long lastcomp)
                  */
                 rdp->nxttail[RCU_NEXT_READY_TAIL] = rdp->nxttail[RCU_NEXT_TAIL];
 
-                cpu_quiet_msk(mask, rsp, rnp, flags); /* releases rnp->lock */
+                rcu_report_qs_rnp(mask, rsp, rnp, flags); /* rlses rnp->lock */
         }
 }
 
@@ -838,8 +883,11 @@ rcu_check_quiescent_state(struct rcu_state *rsp, struct rcu_data *rdp)
         if (!rdp->passed_quiesc)
                 return;
 
-        /* Tell RCU we are done (but cpu_quiet() will be the judge of that). */
-        cpu_quiet(rdp->cpu, rsp, rdp, rdp->passed_quiesc_completed);
+        /*
+         * Tell RCU we are done (but rcu_report_qs_rdp() will be the
+         * judge of that).
+         */
+        rcu_report_qs_rdp(rdp->cpu, rsp, rdp, rdp->passed_quiesc_completed);
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
@@ -899,8 +947,8 @@ static void rcu_adopt_orphan_cbs(struct rcu_state *rsp)
 static void __rcu_offline_cpu(int cpu, struct rcu_state *rsp)
 {
         unsigned long flags;
-        long lastcomp;
         unsigned long mask;
+        int need_report = 0;
         struct rcu_data *rdp = rsp->rda[cpu];
         struct rcu_node *rnp;
 
@@ -914,30 +962,32 @@ static void __rcu_offline_cpu(int cpu, struct rcu_state *rsp)
                 spin_lock(&rnp->lock);          /* irqs already disabled. */
                 rnp->qsmaskinit &= ~mask;
                 if (rnp->qsmaskinit != 0) {
-                        spin_unlock(&rnp->lock); /* irqs remain disabled. */
+                        if (rnp != rdp->mynode)
+                                spin_unlock(&rnp->lock); /* irqs remain disabled. */
                         break;
                 }
-
-                /*
-                 * If there was a task blocking the current grace period,
-                 * and if all CPUs have checked in, we need to propagate
-                 * the quiescent state up the rcu_node hierarchy.  But that
-                 * is inconvenient at the moment due to deadlock issues if
-                 * this should end the current grace period.  So set the
-                 * offlined CPU's bit in ->qsmask in order to force the
-                 * next force_quiescent_state() invocation to clean up this
-                 * mess in a deadlock-free manner.
-                 */
-                if (rcu_preempt_offline_tasks(rsp, rnp, rdp) && !rnp->qsmask)
-                        rnp->qsmask |= mask;
-
+                if (rnp == rdp->mynode)
+                        need_report = rcu_preempt_offline_tasks(rsp, rnp, rdp);
+                else
+                        spin_unlock(&rnp->lock); /* irqs remain disabled. */
                 mask = rnp->grpmask;
-                spin_unlock(&rnp->lock);        /* irqs remain disabled. */
                 rnp = rnp->parent;
         } while (rnp != NULL);
-        lastcomp = rsp->completed;
 
-        spin_unlock_irqrestore(&rsp->onofflock, flags);
+        /*
+         * We still hold the leaf rcu_node structure lock here, and
+         * irqs are still disabled.  The reason for this subterfuge is
+         * because invoking rcu_report_unblock_qs_rnp() with ->onofflock
+         * held leads to deadlock.
+         */
+        spin_unlock(&rsp->onofflock); /* irqs remain disabled. */
+        rnp = rdp->mynode;
+        if (need_report & RCU_OFL_TASKS_NORM_GP)
+                rcu_report_unblock_qs_rnp(rnp, flags);
+        else
+                spin_unlock_irqrestore(&rnp->lock, flags);
+        if (need_report & RCU_OFL_TASKS_EXP_GP)
+                rcu_report_exp_rnp(rsp, rnp);
 
         rcu_adopt_orphan_cbs(rsp);
 }
@@ -1109,7 +1159,7 @@ static int rcu_process_dyntick(struct rcu_state *rsp, long lastcomp,
         rcu_for_each_leaf_node(rsp, rnp) {
                 mask = 0;
                 spin_lock_irqsave(&rnp->lock, flags);
-                if (rsp->completed != lastcomp) {
+                if (rnp->completed != lastcomp) {
                         spin_unlock_irqrestore(&rnp->lock, flags);
                         return 1;
                 }
@@ -1123,10 +1173,10 @@ static int rcu_process_dyntick(struct rcu_state *rsp, long lastcomp,
                         if ((rnp->qsmask & bit) != 0 && f(rsp->rda[cpu]))
                                 mask |= bit;
                 }
-                if (mask != 0 && rsp->completed == lastcomp) {
+                if (mask != 0 && rnp->completed == lastcomp) {
 
-                        /* cpu_quiet_msk() releases rnp->lock. */
-                        cpu_quiet_msk(mask, rsp, rnp, flags);
+                        /* rcu_report_qs_rnp() releases rnp->lock. */
+                        rcu_report_qs_rnp(mask, rsp, rnp, flags);
                         continue;
                 }
                 spin_unlock_irqrestore(&rnp->lock, flags);
@@ -1144,6 +1194,7 @@ static void force_quiescent_state(struct rcu_state *rsp, int relaxed)
         long lastcomp;
         struct rcu_node *rnp = rcu_get_root(rsp);
         u8 signaled;
+        u8 forcenow;
 
         if (!rcu_gp_in_progress(rsp))
                 return;  /* No grace period in progress, nothing to force. */
@@ -1156,10 +1207,10 @@ static void force_quiescent_state(struct rcu_state *rsp, int relaxed)
                 goto unlock_ret; /* no emergency and done recently. */
         rsp->n_force_qs++;
         spin_lock(&rnp->lock);
-        lastcomp = rsp->completed;
+        lastcomp = rsp->gpnum - 1;
         signaled = rsp->signaled;
         rsp->jiffies_force_qs = jiffies + RCU_JIFFIES_TILL_FORCE_QS;
-        if (lastcomp == rsp->gpnum) {
+        if(!rcu_gp_in_progress(rsp)) {
                 rsp->n_force_qs_ngp++;
                 spin_unlock(&rnp->lock);
                 goto unlock_ret;  /* no GP in progress, time updated. */
@@ -1180,21 +1231,29 @@ static void force_quiescent_state(struct rcu_state *rsp, int relaxed)
                 if (rcu_process_dyntick(rsp, lastcomp,
                                         dyntick_save_progress_counter))
                         goto unlock_ret;
+                /* fall into next case. */
+
+        case RCU_SAVE_COMPLETED:
 
                 /* Update state, record completion counter. */
+                forcenow = 0;
                 spin_lock(&rnp->lock);
-                if (lastcomp == rsp->completed &&
-                    rsp->signaled == RCU_SAVE_DYNTICK) {
+                if (lastcomp + 1 == rsp->gpnum &&
+                    lastcomp == rsp->completed &&
+                    rsp->signaled == signaled) {
                         rsp->signaled = RCU_FORCE_QS;
-                        dyntick_record_completed(rsp, lastcomp);
+                        rsp->completed_fqs = lastcomp;
+                        forcenow = signaled == RCU_SAVE_COMPLETED;
                 }
                 spin_unlock(&rnp->lock);
-                break;
+                if (!forcenow)
+                        break;
+                /* fall into next case. */
 
         case RCU_FORCE_QS:
 
                 /* Check dyntick-idle state, send IPI to laggarts. */
-                if (rcu_process_dyntick(rsp, dyntick_recall_completed(rsp),
+                if (rcu_process_dyntick(rsp, rsp->completed_fqs,
                                         rcu_implicit_dynticks_qs))
                         goto unlock_ret;
 
@@ -1351,6 +1410,68 @@ void call_rcu_bh(struct rcu_head *head, void (*func)(struct rcu_head *rcu))
 }
 EXPORT_SYMBOL_GPL(call_rcu_bh);
 
+/**
+ * synchronize_sched - wait until an rcu-sched grace period has elapsed.
+ *
+ * Control will return to the caller some time after a full rcu-sched
+ * grace period has elapsed, in other words after all currently executing
+ * rcu-sched read-side critical sections have completed.   These read-side
+ * critical sections are delimited by rcu_read_lock_sched() and
+ * rcu_read_unlock_sched(), and may be nested.  Note that preempt_disable(),
+ * local_irq_disable(), and so on may be used in place of
+ * rcu_read_lock_sched().
+ *
+ * This means that all preempt_disable code sequences, including NMI and
+ * hardware-interrupt handlers, in progress on entry will have completed
+ * before this primitive returns.  However, this does not guarantee that
+ * softirq handlers will have completed, since in some kernels, these
+ * handlers can run in process context, and can block.
+ *
+ * This primitive provides the guarantees made by the (now removed)
+ * synchronize_kernel() API.  In contrast, synchronize_rcu() only
+ * guarantees that rcu_read_lock() sections will have completed.
+ * In "classic RCU", these two guarantees happen to be one and
+ * the same, but can differ in realtime RCU implementations.
+ */
+void synchronize_sched(void)
+{
+        struct rcu_synchronize rcu;
+
+        if (rcu_blocking_is_gp())
+                return;
+
+        init_completion(&rcu.completion);
+        /* Will wake me after RCU finished. */
+        call_rcu_sched(&rcu.head, wakeme_after_rcu);
+        /* Wait for it. */
+        wait_for_completion(&rcu.completion);
+}
+EXPORT_SYMBOL_GPL(synchronize_sched);
+
+/**
+ * synchronize_rcu_bh - wait until an rcu_bh grace period has elapsed.
+ *
+ * Control will return to the caller some time after a full rcu_bh grace
+ * period has elapsed, in other words after all currently executing rcu_bh
+ * read-side critical sections have completed.  RCU read-side critical
+ * sections are delimited by rcu_read_lock_bh() and rcu_read_unlock_bh(),
+ * and may be nested.
+ */
+void synchronize_rcu_bh(void)
+{
+        struct rcu_synchronize rcu;
+
+        if (rcu_blocking_is_gp())
+                return;
+
+        init_completion(&rcu.completion);
+        /* Will wake me after RCU finished. */
+        call_rcu_bh(&rcu.head, wakeme_after_rcu);
+        /* Wait for it. */
+        wait_for_completion(&rcu.completion);
+}
+EXPORT_SYMBOL_GPL(synchronize_rcu_bh);
+
 /*
  * Check to see if there is any immediate RCU-related work to be done
  * by the current CPU, for the specified type of RCU, returning 1 if so.
@@ -1360,6 +1481,8 @@ EXPORT_SYMBOL_GPL(call_rcu_bh);
  */
 static int __rcu_pending(struct rcu_state *rsp, struct rcu_data *rdp)
 {
+        struct rcu_node *rnp = rdp->mynode;
+
         rdp->n_rcu_pending++;
 
         /* Check for CPU stalls, if enabled. */
@@ -1384,13 +1507,13 @@ static int __rcu_pending(struct rcu_state *rsp, struct rcu_data *rdp)
         }
 
         /* Has another RCU grace period completed?  */
-        if (ACCESS_ONCE(rsp->completed) != rdp->completed) { /* outside lock */
+        if (ACCESS_ONCE(rnp->completed) != rdp->completed) { /* outside lock */
                 rdp->n_rp_gp_completed++;
                 return 1;
         }
 
         /* Has a new RCU grace period started? */
-        if (ACCESS_ONCE(rsp->gpnum) != rdp->gpnum) { /* outside lock */
+        if (ACCESS_ONCE(rnp->gpnum) != rdp->gpnum) { /* outside lock */
                 rdp->n_rp_gp_started++;
                 return 1;
         }
@@ -1433,6 +1556,21 @@ int rcu_needs_cpu(int cpu)
                rcu_preempt_needs_cpu(cpu);
 }
 
+/*
+ * This function is invoked towards the end of the scheduler's initialization
+ * process.  Before this is called, the idle task might contain
+ * RCU read-side critical sections (during which time, this idle
+ * task is booting the system).  After this function is called, the
+ * idle tasks are prohibited from containing RCU read-side critical
+ * sections.
+ */
+void rcu_scheduler_starting(void)
+{
+        WARN_ON(num_online_cpus() != 1);
+        WARN_ON(nr_context_switches() > 0);
+        rcu_scheduler_active = 1;
+}
+
 static DEFINE_PER_CPU(struct rcu_head, rcu_barrier_head) = {NULL};
 static atomic_t rcu_barrier_cpu_count;
 static DEFINE_MUTEX(rcu_barrier_mutex);
@@ -1544,21 +1682,16 @@ static void __cpuinit
 rcu_init_percpu_data(int cpu, struct rcu_state *rsp, int preemptable)
 {
         unsigned long flags;
-        long lastcomp;
         unsigned long mask;
         struct rcu_data *rdp = rsp->rda[cpu];
         struct rcu_node *rnp = rcu_get_root(rsp);
 
         /* Set up local state, ensuring consistent view of global state. */
         spin_lock_irqsave(&rnp->lock, flags);
-        lastcomp = rsp->completed;
-        rdp->completed = lastcomp;
-        rdp->gpnum = lastcomp;
         rdp->passed_quiesc = 0;  /* We could be racing with new GP, */
         rdp->qs_pending = 1;     /*  so set up to respond to current GP. */
         rdp->beenonline = 1;     /* We have now been online. */
         rdp->preemptable = preemptable;
-        rdp->passed_quiesc_completed = lastcomp - 1;
         rdp->qlen_last_fqs_check = 0;
         rdp->n_force_qs_snap = rsp->n_force_qs;
         rdp->blimit = blimit;
@@ -1580,6 +1713,11 @@ rcu_init_percpu_data(int cpu, struct rcu_state *rsp, int preemptable)
                 spin_lock(&rnp->lock);  /* irqs already disabled. */
                 rnp->qsmaskinit |= mask;
                 mask = rnp->grpmask;
+                if (rnp == rdp->mynode) {
+                        rdp->gpnum = rnp->completed; /* if GP in progress... */
+                        rdp->completed = rnp->completed;
+                        rdp->passed_quiesc_completed = rnp->completed - 1;
+                }
                 spin_unlock(&rnp->lock); /* irqs already disabled. */
                 rnp = rnp->parent;
         } while (rnp != NULL && !(rnp->qsmaskinit & mask));
@@ -1597,8 +1735,8 @@ static void __cpuinit rcu_online_cpu(int cpu)
 /*
  * Handle CPU online/offline notification events.
  */
-int __cpuinit rcu_cpu_notify(struct notifier_block *self,
-                             unsigned long action, void *hcpu)
+static int __cpuinit rcu_cpu_notify(struct notifier_block *self,
+                                    unsigned long action, void *hcpu)
 {
         long cpu = (long)hcpu;
 
@@ -1685,8 +1823,8 @@ static void __init rcu_init_one(struct rcu_state *rsp)
                 cpustride *= rsp->levelspread[i];
                 rnp = rsp->level[i];
                 for (j = 0; j < rsp->levelcnt[i]; j++, rnp++) {
-                        if (rnp != rcu_get_root(rsp))
-                                spin_lock_init(&rnp->lock);
+                        spin_lock_init(&rnp->lock);
+                        lockdep_set_class(&rnp->lock, &rcu_node_class[i]);
                         rnp->gpnum = 0;
                         rnp->qsmask = 0;
                         rnp->qsmaskinit = 0;
@@ -1707,9 +1845,10 @@ static void __init rcu_init_one(struct rcu_state *rsp)
                         rnp->level = i;
                         INIT_LIST_HEAD(&rnp->blocked_tasks[0]);
                         INIT_LIST_HEAD(&rnp->blocked_tasks[1]);
+                        INIT_LIST_HEAD(&rnp->blocked_tasks[2]);
+                        INIT_LIST_HEAD(&rnp->blocked_tasks[3]);
                 }
         }
-        spin_lock_init(&rcu_get_root(rsp)->lock);
 }
 
 /*
@@ -1735,16 +1874,30 @@ do { \
         } \
 } while (0)
 
-void __init __rcu_init(void)
+void __init rcu_init(void)
 {
+        int i;
+
         rcu_bootup_announce();
 #ifdef CONFIG_RCU_CPU_STALL_DETECTOR
         printk(KERN_INFO "RCU-based detection of stalled CPUs is enabled.\n");
 #endif /* #ifdef CONFIG_RCU_CPU_STALL_DETECTOR */
+#if NUM_RCU_LVL_4 != 0
+        printk(KERN_INFO "Experimental four-level hierarchy is enabled.\n");
+#endif /* #if NUM_RCU_LVL_4 != 0 */
         RCU_INIT_FLAVOR(&rcu_sched_state, rcu_sched_data);
         RCU_INIT_FLAVOR(&rcu_bh_state, rcu_bh_data);
         __rcu_init_preempt();
         open_softirq(RCU_SOFTIRQ, rcu_process_callbacks);
+
+        /*
+         * We don't need protection against CPU-hotplug here because
+         * this is called early in boot, before either interrupts
+         * or the scheduler are operational.
+         */
+        cpu_notifier(rcu_cpu_notify, 0);
+        for_each_online_cpu(i)
+                rcu_cpu_notify(NULL, CPU_UP_PREPARE, (void *)(long)i);
 }
 
 #include "rcutree_plugin.h"
diff --git a/kernel/rcutree.h b/kernel/rcutree.h
index 1899023b0962..d2a0046f63b2 100644
--- a/kernel/rcutree.h
+++ b/kernel/rcutree.h
@@ -34,10 +34,11 @@
  * In practice, this has not been tested, so there is probably some
  * bug somewhere.
  */
-#define MAX_RCU_LVLS 3
+#define MAX_RCU_LVLS 4
 #define RCU_FANOUT            (CONFIG_RCU_FANOUT)
 #define RCU_FANOUT_SQ         (RCU_FANOUT * RCU_FANOUT)
 #define RCU_FANOUT_CUBE       (RCU_FANOUT_SQ * RCU_FANOUT)
+#define RCU_FANOUT_FOURTH     (RCU_FANOUT_CUBE * RCU_FANOUT)
 
 #if NR_CPUS <= RCU_FANOUT
 #  define NUM_RCU_LVLS        1
@@ -45,23 +46,33 @@
 #  define NUM_RCU_LVL_1       (NR_CPUS)
 #  define NUM_RCU_LVL_2       0
 #  define NUM_RCU_LVL_3       0
+#  define NUM_RCU_LVL_4       0
 #elif NR_CPUS <= RCU_FANOUT_SQ
 #  define NUM_RCU_LVLS        2
 #  define NUM_RCU_LVL_0       1
 #  define NUM_RCU_LVL_1       DIV_ROUND_UP(NR_CPUS, RCU_FANOUT)
 #  define NUM_RCU_LVL_2       (NR_CPUS)
 #  define NUM_RCU_LVL_3       0
+#  define NUM_RCU_LVL_4       0
 #elif NR_CPUS <= RCU_FANOUT_CUBE
 #  define NUM_RCU_LVLS        3
 #  define NUM_RCU_LVL_0       1
 #  define NUM_RCU_LVL_1       DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_SQ)
 #  define NUM_RCU_LVL_2       DIV_ROUND_UP(NR_CPUS, RCU_FANOUT)
 #  define NUM_RCU_LVL_3       NR_CPUS
+#  define NUM_RCU_LVL_4       0
+#elif NR_CPUS <= RCU_FANOUT_FOURTH
+#  define NUM_RCU_LVLS        4
+#  define NUM_RCU_LVL_0       1
+#  define NUM_RCU_LVL_1       DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_CUBE)
+#  define NUM_RCU_LVL_2       DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_SQ)
+#  define NUM_RCU_LVL_3       DIV_ROUND_UP(NR_CPUS, RCU_FANOUT)
+#  define NUM_RCU_LVL_4       NR_CPUS
 #else
 # error "CONFIG_RCU_FANOUT insufficient for NR_CPUS"
 #endif /* #if (NR_CPUS) <= RCU_FANOUT */
 
-#define RCU_SUM (NUM_RCU_LVL_0 + NUM_RCU_LVL_1 + NUM_RCU_LVL_2 + NUM_RCU_LVL_3)
+#define RCU_SUM (NUM_RCU_LVL_0 + NUM_RCU_LVL_1 + NUM_RCU_LVL_2 + NUM_RCU_LVL_3 + NUM_RCU_LVL_4)
 #define NUM_RCU_NODES (RCU_SUM - NR_CPUS)
 
 /*
@@ -84,14 +95,21 @@ struct rcu_node {
         long    gpnum;          /* Current grace period for this node. */
                                 /*  This will either be equal to or one */
                                 /*  behind the root rcu_node's gpnum. */
+        long    completed;      /* Last grace period completed for this node. */
+                                /*  This will either be equal to or one */
+                                /*  behind the root rcu_node's gpnum. */
         unsigned long qsmask;   /* CPUs or groups that need to switch in */
                                 /*  order for current grace period to proceed.*/
                                 /*  In leaf rcu_node, each bit corresponds to */
                                 /*  an rcu_data structure, otherwise, each */
                                 /*  bit corresponds to a child rcu_node */
                                 /*  structure. */
+        unsigned long expmask;  /* Groups that have ->blocked_tasks[] */
+                                /*  elements that need to drain to allow the */
+                                /*  current expedited grace period to */
+                                /*  complete (only for TREE_PREEMPT_RCU). */
         unsigned long qsmaskinit;
-                                /* Per-GP initialization for qsmask. */
+                                /* Per-GP initial value for qsmask & expmask. */
         unsigned long grpmask;  /* Mask to apply to parent qsmask. */
                                 /*  Only one bit will be set in this mask. */
         int     grplo;          /* lowest-numbered CPU or group here. */
@@ -99,7 +117,7 @@ struct rcu_node {
         u8      grpnum;         /* CPU/group number for next level up. */
         u8      level;          /* root is at level 0. */
         struct rcu_node *parent;
-        struct list_head blocked_tasks[2];
+        struct list_head blocked_tasks[4];
                                 /* Tasks blocked in RCU read-side critsect. */
                                 /*  Grace period number (->gpnum) x blocked */
                                 /*  by tasks on the (x & 0x1) element of the */
@@ -114,6 +132,21 @@ struct rcu_node {
         for ((rnp) = &(rsp)->node[0]; \
              (rnp) < &(rsp)->node[NUM_RCU_NODES]; (rnp)++)
 
+/*
+ * Do a breadth-first scan of the non-leaf rcu_node structures for the
+ * specified rcu_state structure.  Note that if there is a singleton
+ * rcu_node tree with but one rcu_node structure, this loop is a no-op.
+ */
+#define rcu_for_each_nonleaf_node_breadth_first(rsp, rnp) \
+        for ((rnp) = &(rsp)->node[0]; \
+             (rnp) < (rsp)->level[NUM_RCU_LVLS - 1]; (rnp)++)
+
+/*
+ * Scan the leaves of the rcu_node hierarchy for the specified rcu_state
+ * structure.  Note that if there is a singleton rcu_node tree with but
+ * one rcu_node structure, this loop -will- visit the rcu_node structure.
+ * It is still a leaf node, even if it is also the root node.
+ */
 #define rcu_for_each_leaf_node(rsp, rnp) \
         for ((rnp) = (rsp)->level[NUM_RCU_LVLS - 1]; \
              (rnp) < &(rsp)->node[NUM_RCU_NODES]; (rnp)++)
@@ -204,11 +237,12 @@ struct rcu_data {
 #define RCU_GP_IDLE             0       /* No grace period in progress. */
 #define RCU_GP_INIT             1       /* Grace period being initialized. */
 #define RCU_SAVE_DYNTICK        2       /* Need to scan dyntick state. */
-#define RCU_FORCE_QS            3       /* Need to force quiescent state. */
+#define RCU_SAVE_COMPLETED      3       /* Need to save rsp->completed. */
+#define RCU_FORCE_QS            4       /* Need to force quiescent state. */
 #ifdef CONFIG_NO_HZ
 #define RCU_SIGNAL_INIT         RCU_SAVE_DYNTICK
 #else /* #ifdef CONFIG_NO_HZ */
-#define RCU_SIGNAL_INIT         RCU_FORCE_QS
+#define RCU_SIGNAL_INIT         RCU_SAVE_COMPLETED
 #endif /* #else #ifdef CONFIG_NO_HZ */
 
 #define RCU_JIFFIES_TILL_FORCE_QS        3      /* for rsp->jiffies_force_qs */
@@ -246,7 +280,7 @@ struct rcu_state {
         long    gpnum;                          /* Current gp number. */
         long    completed;                      /* # of last completed gp. */
 
-        /* End  of fields guarded by root rcu_node's lock. */
+        /* End of fields guarded by root rcu_node's lock. */
 
         spinlock_t onofflock;                   /* exclude on/offline and */
                                                 /*  starting new GP.  Also */
@@ -260,6 +294,8 @@ struct rcu_state {
         long orphan_qlen;                       /* Number of orphaned cbs. */
         spinlock_t fqslock;                     /* Only one task forcing */
                                                 /*  quiescent states. */
+        long    completed_fqs;                  /* Value of completed @ snap. */
+                                                /*  Protected by fqslock. */
         unsigned long jiffies_force_qs;         /* Time at which to invoke */
                                                 /*  force_quiescent_state(). */
         unsigned long n_force_qs;               /* Number of calls to */
@@ -274,11 +310,15 @@ struct rcu_state {
         unsigned long jiffies_stall;            /* Time at which to check */
                                                 /*  for CPU stalls. */
 #endif /* #ifdef CONFIG_RCU_CPU_STALL_DETECTOR */
-#ifdef CONFIG_NO_HZ
-        long dynticks_completed;                /* Value of completed @ snap. */
-#endif /* #ifdef CONFIG_NO_HZ */
 };
 
+/* Return values for rcu_preempt_offline_tasks(). */
+
+#define RCU_OFL_TASKS_NORM_GP   0x1             /* Tasks blocking normal */
+                                                /*  GP were moved to root. */
+#define RCU_OFL_TASKS_EXP_GP    0x2             /* Tasks blocking expedited */
+                                                /*  GP were moved to root. */
+
 #ifdef RCU_TREE_NONCORE
 
 /*
@@ -298,10 +338,14 @@ DECLARE_PER_CPU(struct rcu_data, rcu_preempt_data);
 #else /* #ifdef RCU_TREE_NONCORE */
 
 /* Forward declarations for rcutree_plugin.h */
-static inline void rcu_bootup_announce(void);
+static void rcu_bootup_announce(void);
 long rcu_batches_completed(void);
 static void rcu_preempt_note_context_switch(int cpu);
 static int rcu_preempted_readers(struct rcu_node *rnp);
+#ifdef CONFIG_HOTPLUG_CPU
+static void rcu_report_unblock_qs_rnp(struct rcu_node *rnp,
+                                      unsigned long flags);
+#endif /* #ifdef CONFIG_HOTPLUG_CPU */
 #ifdef CONFIG_RCU_CPU_STALL_DETECTOR
 static void rcu_print_task_stall(struct rcu_node *rnp);
 #endif /* #ifdef CONFIG_RCU_CPU_STALL_DETECTOR */
@@ -315,6 +359,9 @@ static void rcu_preempt_offline_cpu(int cpu);
 static void rcu_preempt_check_callbacks(int cpu);
 static void rcu_preempt_process_callbacks(void);
 void call_rcu(struct rcu_head *head, void (*func)(struct rcu_head *rcu));
+#if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_TREE_PREEMPT_RCU)
+static void rcu_report_exp_rnp(struct rcu_state *rsp, struct rcu_node *rnp);
+#endif /* #if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_TREE_PREEMPT_RCU) */
 static int rcu_preempt_pending(int cpu);
 static int rcu_preempt_needs_cpu(int cpu);
 static void __cpuinit rcu_preempt_init_percpu_data(int cpu);
diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index ef2a58c2b9d5..37fbccdf41d5 100644
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -24,16 +24,19 @@
  *         Paul E. McKenney <paulmck@linux.vnet.ibm.com>
  */
 
+#include <linux/delay.h>
 
 #ifdef CONFIG_TREE_PREEMPT_RCU
 
 struct rcu_state rcu_preempt_state = RCU_STATE_INITIALIZER(rcu_preempt_state);
 DEFINE_PER_CPU(struct rcu_data, rcu_preempt_data);
 
+static int rcu_preempted_readers_exp(struct rcu_node *rnp);
+
 /*
  * Tell them what RCU they are running.
  */
-static inline void rcu_bootup_announce(void)
+static void __init rcu_bootup_announce(void)
 {
         printk(KERN_INFO
                "Experimental preemptable hierarchical RCU implementation.\n");
@@ -67,7 +70,7 @@ EXPORT_SYMBOL_GPL(rcu_batches_completed);
 static void rcu_preempt_qs(int cpu)
 {
         struct rcu_data *rdp = &per_cpu(rcu_preempt_data, cpu);
-        rdp->passed_quiesc_completed = rdp->completed;
+        rdp->passed_quiesc_completed = rdp->gpnum - 1;
         barrier();
         rdp->passed_quiesc = 1;
 }
@@ -157,14 +160,58 @@ EXPORT_SYMBOL_GPL(__rcu_read_lock);
  */
 static int rcu_preempted_readers(struct rcu_node *rnp)
 {
-        return !list_empty(&rnp->blocked_tasks[rnp->gpnum & 0x1]);
+        int phase = rnp->gpnum & 0x1;
+
+        return !list_empty(&rnp->blocked_tasks[phase]) ||
+               !list_empty(&rnp->blocked_tasks[phase + 2]);
+}
+
+/*
+ * Record a quiescent state for all tasks that were previously queued
+ * on the specified rcu_node structure and that were blocking the current
+ * RCU grace period.  The caller must hold the specified rnp->lock with
+ * irqs disabled, and this lock is released upon return, but irqs remain
+ * disabled.
+ */
+static void rcu_report_unblock_qs_rnp(struct rcu_node *rnp, unsigned long flags)
+        __releases(rnp->lock)
+{
+        unsigned long mask;
+        struct rcu_node *rnp_p;
+
+        if (rnp->qsmask != 0 || rcu_preempted_readers(rnp)) {
+                spin_unlock_irqrestore(&rnp->lock, flags);
+                return;  /* Still need more quiescent states! */
+        }
+
+        rnp_p = rnp->parent;
+        if (rnp_p == NULL) {
+                /*
+                 * Either there is only one rcu_node in the tree,
+                 * or tasks were kicked up to root rcu_node due to
+                 * CPUs going offline.
+                 */
+                rcu_report_qs_rsp(&rcu_preempt_state, flags);
+                return;
+        }
+
+        /* Report up the rest of the hierarchy. */
+        mask = rnp->grpmask;
+        spin_unlock(&rnp->lock);        /* irqs remain disabled. */
+        spin_lock(&rnp_p->lock);        /* irqs already disabled. */
+        rcu_report_qs_rnp(mask, &rcu_preempt_state, rnp_p, flags);
 }
 
+/*
+ * Handle special cases during rcu_read_unlock(), such as needing to
+ * notify RCU core processing or task having blocked during the RCU
+ * read-side critical section.
+ */
 static void rcu_read_unlock_special(struct task_struct *t)
 {
         int empty;
+        int empty_exp;
         unsigned long flags;
-        unsigned long mask;
         struct rcu_node *rnp;
         int special;
 
@@ -207,36 +254,30 @@ static void rcu_read_unlock_special(struct task_struct *t)
                         spin_unlock(&rnp->lock);  /* irqs remain disabled. */
                 }
                 empty = !rcu_preempted_readers(rnp);
+                empty_exp = !rcu_preempted_readers_exp(rnp);
+                smp_mb(); /* ensure expedited fastpath sees end of RCU c-s. */
                 list_del_init(&t->rcu_node_entry);
                 t->rcu_blocked_node = NULL;
 
                 /*
                  * If this was the last task on the current list, and if
                  * we aren't waiting on any CPUs, report the quiescent state.
-                 * Note that both cpu_quiet_msk_finish() and cpu_quiet_msk()
-                 * drop rnp->lock and restore irq.
+                 * Note that rcu_report_unblock_qs_rnp() releases rnp->lock.
                  */
-                if (!empty && rnp->qsmask == 0 &&
-                    !rcu_preempted_readers(rnp)) {
-                        struct rcu_node *rnp_p;
-
-                        if (rnp->parent == NULL) {
-                                /* Only one rcu_node in the tree. */
-                                cpu_quiet_msk_finish(&rcu_preempt_state, flags);
-                                return;
-                        }
-                        /* Report up the rest of the hierarchy. */
-                        mask = rnp->grpmask;
+                if (empty)
                         spin_unlock_irqrestore(&rnp->lock, flags);
-                        rnp_p = rnp->parent;
-                        spin_lock_irqsave(&rnp_p->lock, flags);
-                        WARN_ON_ONCE(rnp->qsmask);
-                        cpu_quiet_msk(mask, &rcu_preempt_state, rnp_p, flags);
-                        return;
-                }
-                spin_unlock(&rnp->lock);
+                else
+                        rcu_report_unblock_qs_rnp(rnp, flags);
+
+                /*
+                 * If this was the last task on the expedited lists,
+                 * then we need to report up the rcu_node hierarchy.
+                 */
+                if (!empty_exp && !rcu_preempted_readers_exp(rnp))
+                        rcu_report_exp_rnp(&rcu_preempt_state, rnp);
+        } else {
+                local_irq_restore(flags);
         }
-        local_irq_restore(flags);
 }
 
 /*
@@ -303,6 +344,8 @@ static void rcu_preempt_check_blocked_tasks(struct rcu_node *rnp)
  * rcu_node.  The reason for not just moving them to the immediate
  * parent is to remove the need for rcu_read_unlock_special() to
  * make more than two attempts to acquire the target rcu_node's lock.
+ * Returns true if there were tasks blocking the current RCU grace
+ * period.
  *
  * Returns 1 if there was previously a task blocking the current grace
  * period on the specified rcu_node structure.
@@ -316,7 +359,7 @@ static int rcu_preempt_offline_tasks(struct rcu_state *rsp,
         int i;
         struct list_head *lp;
         struct list_head *lp_root;
-        int retval = rcu_preempted_readers(rnp);
+        int retval = 0;
         struct rcu_node *rnp_root = rcu_get_root(rsp);
         struct task_struct *tp;
 
@@ -326,7 +369,9 @@ static int rcu_preempt_offline_tasks(struct rcu_state *rsp,
         }
         WARN_ON_ONCE(rnp != rdp->mynode &&
                      (!list_empty(&rnp->blocked_tasks[0]) ||
-                      !list_empty(&rnp->blocked_tasks[1])));
+                      !list_empty(&rnp->blocked_tasks[1]) ||
+                      !list_empty(&rnp->blocked_tasks[2]) ||
+                      !list_empty(&rnp->blocked_tasks[3])));
 
         /*
          * Move tasks up to root rcu_node.  Rely on the fact that the
@@ -334,7 +379,11 @@ static int rcu_preempt_offline_tasks(struct rcu_state *rsp,
          * rcu_nodes in terms of gp_num value.  This fact allows us to
          * move the blocked_tasks[] array directly, element by element.
          */
-        for (i = 0; i < 2; i++) {
+        if (rcu_preempted_readers(rnp))
+                retval |= RCU_OFL_TASKS_NORM_GP;
+        if (rcu_preempted_readers_exp(rnp))
+                retval |= RCU_OFL_TASKS_EXP_GP;
+        for (i = 0; i < 4; i++) {
                 lp = &rnp->blocked_tasks[i];
                 lp_root = &rnp_root->blocked_tasks[i];
                 while (!list_empty(lp)) {
@@ -346,7 +395,6 @@ static int rcu_preempt_offline_tasks(struct rcu_state *rsp,
                         spin_unlock(&rnp_root->lock); /* irqs remain disabled */
                 }
         }
-
         return retval;
 }
 
@@ -398,14 +446,183 @@ void call_rcu(struct rcu_head *head, void (*func)(struct rcu_head *rcu))
 }
 EXPORT_SYMBOL_GPL(call_rcu);
 
+/**
+ * synchronize_rcu - wait until a grace period has elapsed.
+ *
+ * Control will return to the caller some time after a full grace
+ * period has elapsed, in other words after all currently executing RCU
+ * read-side critical sections have completed.  RCU read-side critical
+ * sections are delimited by rcu_read_lock() and rcu_read_unlock(),
+ * and may be nested.
+ */
+void synchronize_rcu(void)
+{
+        struct rcu_synchronize rcu;
+
+        if (!rcu_scheduler_active)
+                return;
+
+        init_completion(&rcu.completion);
+        /* Will wake me after RCU finished. */
+        call_rcu(&rcu.head, wakeme_after_rcu);
+        /* Wait for it. */
+        wait_for_completion(&rcu.completion);
+}
+EXPORT_SYMBOL_GPL(synchronize_rcu);
+
+static DECLARE_WAIT_QUEUE_HEAD(sync_rcu_preempt_exp_wq);
+static long sync_rcu_preempt_exp_count;
+static DEFINE_MUTEX(sync_rcu_preempt_exp_mutex);
+
 /*
- * Wait for an rcu-preempt grace period.  We are supposed to expedite the
- * grace period, but this is the crude slow compatability hack, so just
- * invoke synchronize_rcu().
+ * Return non-zero if there are any tasks in RCU read-side critical
+ * sections blocking the current preemptible-RCU expedited grace period.
+ * If there is no preemptible-RCU expedited grace period currently in
+ * progress, returns zero unconditionally.
+ */
+static int rcu_preempted_readers_exp(struct rcu_node *rnp)
+{
+        return !list_empty(&rnp->blocked_tasks[2]) ||
+               !list_empty(&rnp->blocked_tasks[3]);
+}
+
+/*
+ * return non-zero if there is no RCU expedited grace period in progress
+ * for the specified rcu_node structure, in other words, if all CPUs and
+ * tasks covered by the specified rcu_node structure have done their bit
+ * for the current expedited grace period.  Works only for preemptible
+ * RCU -- other RCU implementation use other means.
+ *
+ * Caller must hold sync_rcu_preempt_exp_mutex.
+ */
+static int sync_rcu_preempt_exp_done(struct rcu_node *rnp)
+{
+        return !rcu_preempted_readers_exp(rnp) &&
+               ACCESS_ONCE(rnp->expmask) == 0;
+}
+
+/*
+ * Report the exit from RCU read-side critical section for the last task
+ * that queued itself during or before the current expedited preemptible-RCU
+ * grace period.  This event is reported either to the rcu_node structure on
+ * which the task was queued or to one of that rcu_node structure's ancestors,
+ * recursively up the tree.  (Calm down, calm down, we do the recursion
+ * iteratively!)
+ *
+ * Caller must hold sync_rcu_preempt_exp_mutex.
+ */
+static void rcu_report_exp_rnp(struct rcu_state *rsp, struct rcu_node *rnp)
+{
+        unsigned long flags;
+        unsigned long mask;
+
+        spin_lock_irqsave(&rnp->lock, flags);
+        for (;;) {
+                if (!sync_rcu_preempt_exp_done(rnp))
+                        break;
+                if (rnp->parent == NULL) {
+                        wake_up(&sync_rcu_preempt_exp_wq);
+                        break;
+                }
+                mask = rnp->grpmask;
+                spin_unlock(&rnp->lock); /* irqs remain disabled */
+                rnp = rnp->parent;
+                spin_lock(&rnp->lock); /* irqs already disabled */
+                rnp->expmask &= ~mask;
+        }
+        spin_unlock_irqrestore(&rnp->lock, flags);
+}
+
+/*
+ * Snapshot the tasks blocking the newly started preemptible-RCU expedited
+ * grace period for the specified rcu_node structure.  If there are no such
+ * tasks, report it up the rcu_node hierarchy.
+ *
+ * Caller must hold sync_rcu_preempt_exp_mutex and rsp->onofflock.
+ */
+static void
+sync_rcu_preempt_exp_init(struct rcu_state *rsp, struct rcu_node *rnp)
+{
+        int must_wait;
+
+        spin_lock(&rnp->lock); /* irqs already disabled */
+        list_splice_init(&rnp->blocked_tasks[0], &rnp->blocked_tasks[2]);
+        list_splice_init(&rnp->blocked_tasks[1], &rnp->blocked_tasks[3]);
+        must_wait = rcu_preempted_readers_exp(rnp);
+        spin_unlock(&rnp->lock); /* irqs remain disabled */
+        if (!must_wait)
+                rcu_report_exp_rnp(rsp, rnp);
+}
+
+/*
+ * Wait for an rcu-preempt grace period, but expedite it.  The basic idea
+ * is to invoke synchronize_sched_expedited() to push all the tasks to
+ * the ->blocked_tasks[] lists, move all entries from the first set of
+ * ->blocked_tasks[] lists to the second set, and finally wait for this
+ * second set to drain.
  */
 void synchronize_rcu_expedited(void)
 {
-        synchronize_rcu();
+        unsigned long flags;
+        struct rcu_node *rnp;
+        struct rcu_state *rsp = &rcu_preempt_state;
+        long snap;
+        int trycount = 0;
+
+        smp_mb(); /* Caller's modifications seen first by other CPUs. */
+        snap = ACCESS_ONCE(sync_rcu_preempt_exp_count) + 1;
+        smp_mb(); /* Above access cannot bleed into critical section. */
+
+        /*
+         * Acquire lock, falling back to synchronize_rcu() if too many
+         * lock-acquisition failures.  Of course, if someone does the
+         * expedited grace period for us, just leave.
+         */
+        while (!mutex_trylock(&sync_rcu_preempt_exp_mutex)) {
+                if (trycount++ < 10)
+                        udelay(trycount * num_online_cpus());
+                else {
+                        synchronize_rcu();
+                        return;
+                }
+                if ((ACCESS_ONCE(sync_rcu_preempt_exp_count) - snap) > 0)
+                        goto mb_ret; /* Others did our work for us. */
+        }
+        if ((ACCESS_ONCE(sync_rcu_preempt_exp_count) - snap) > 0)
+                goto unlock_mb_ret; /* Others did our work for us. */
+
+        /* force all RCU readers onto blocked_tasks[]. */
+        synchronize_sched_expedited();
+
+        spin_lock_irqsave(&rsp->onofflock, flags);
+
+        /* Initialize ->expmask for all non-leaf rcu_node structures. */
+        rcu_for_each_nonleaf_node_breadth_first(rsp, rnp) {
+                spin_lock(&rnp->lock); /* irqs already disabled. */
+                rnp->expmask = rnp->qsmaskinit;
+                spin_unlock(&rnp->lock); /* irqs remain disabled. */
+        }
+
+        /* Snapshot current state of ->blocked_tasks[] lists. */
+        rcu_for_each_leaf_node(rsp, rnp)
+                sync_rcu_preempt_exp_init(rsp, rnp);
+        if (NUM_RCU_NODES > 1)
+                sync_rcu_preempt_exp_init(rsp, rcu_get_root(rsp));
+
+        spin_unlock_irqrestore(&rsp->onofflock, flags);
+
+        /* Wait for snapshotted ->blocked_tasks[] lists to drain. */
+        rnp = rcu_get_root(rsp);
+        wait_event(sync_rcu_preempt_exp_wq,
+                   sync_rcu_preempt_exp_done(rnp));
+
+        /* Clean up and exit. */
+        smp_mb(); /* ensure expedited GP seen before counter increment. */
+        ACCESS_ONCE(sync_rcu_preempt_exp_count)++;
+unlock_mb_ret:
+        mutex_unlock(&sync_rcu_preempt_exp_mutex);
+mb_ret:
+        smp_mb(); /* ensure subsequent action seen after grace period. */
 }
 EXPORT_SYMBOL_GPL(synchronize_rcu_expedited);
 
@@ -481,7 +698,7 @@ void exit_rcu(void)
 /*
  * Tell them what RCU they are running.
  */
-static inline void rcu_bootup_announce(void)
+static void __init rcu_bootup_announce(void)
 {
         printk(KERN_INFO "Hierarchical RCU implementation.\n");
 }
@@ -512,6 +729,16 @@ static int rcu_preempted_readers(struct rcu_node *rnp)
         return 0;
 }
 
+#ifdef CONFIG_HOTPLUG_CPU
+
+/* Because preemptible RCU does not exist, no quieting of tasks. */
+static void rcu_report_unblock_qs_rnp(struct rcu_node *rnp, unsigned long flags)
+{
+        spin_unlock_irqrestore(&rnp->lock, flags);
+}
+
+#endif /* #ifdef CONFIG_HOTPLUG_CPU */
+
 #ifdef CONFIG_RCU_CPU_STALL_DETECTOR
 
 /*
@@ -594,6 +821,20 @@ void synchronize_rcu_expedited(void)
 }
 EXPORT_SYMBOL_GPL(synchronize_rcu_expedited);
 
+#ifdef CONFIG_HOTPLUG_CPU
+
+/*
+ * Because preemptable RCU does not exist, there is never any need to
+ * report on tasks preempted in RCU read-side critical sections during
+ * expedited RCU grace periods.
+ */
+static void rcu_report_exp_rnp(struct rcu_state *rsp, struct rcu_node *rnp)
+{
+        return;
+}
+
+#endif /* #ifdef CONFIG_HOTPLUG_CPU */
+
 /*
  * Because preemptable RCU does not exist, it never has any work to do.
  */
diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c
index 4b31c779e62e..9d2c88423b31 100644
--- a/kernel/rcutree_trace.c
+++ b/kernel/rcutree_trace.c
@@ -155,12 +155,15 @@ static const struct file_operations rcudata_csv_fops = {
 
 static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp)
 {
+        long gpnum;
         int level = 0;
+        int phase;
         struct rcu_node *rnp;
 
+        gpnum = rsp->gpnum;
         seq_printf(m, "c=%ld g=%ld s=%d jfq=%ld j=%x "
                       "nfqs=%lu/nfqsng=%lu(%lu) fqlh=%lu oqlen=%ld\n",
-                   rsp->completed, rsp->gpnum, rsp->signaled,
+                   rsp->completed, gpnum, rsp->signaled,
                    (long)(rsp->jiffies_force_qs - jiffies),
                    (int)(jiffies & 0xffff),
                    rsp->n_force_qs, rsp->n_force_qs_ngp,
@@ -171,8 +174,13 @@ static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp)
                         seq_puts(m, "\n");
                         level = rnp->level;
                 }
-                seq_printf(m, "%lx/%lx %d:%d ^%d    ",
+                phase = gpnum & 0x1;
+                seq_printf(m, "%lx/%lx %c%c>%c%c %d:%d ^%d    ",
                            rnp->qsmask, rnp->qsmaskinit,
+                           "T."[list_empty(&rnp->blocked_tasks[phase])],
+                           "E."[list_empty(&rnp->blocked_tasks[phase + 2])],
+                           "T."[list_empty(&rnp->blocked_tasks[!phase])],
+                           "E."[list_empty(&rnp->blocked_tasks[!phase + 2])],
                            rnp->grplo, rnp->grphi, rnp->grpnum);
         }
         seq_puts(m, "\n");
diff --git a/kernel/relay.c b/kernel/relay.c
index 760c26209a3c..c705a41b4ba3 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -1198,7 +1198,7 @@ static void relay_pipe_buf_release(struct pipe_inode_info *pipe,
         relay_consume_bytes(rbuf, buf->private);
 }
 
-static struct pipe_buf_operations relay_pipe_buf_ops = {
+static const struct pipe_buf_operations relay_pipe_buf_ops = {
         .can_merge = 0,
         .map = generic_pipe_buf_map,
         .unmap = generic_pipe_buf_unmap,
diff --git a/kernel/resource.c b/kernel/resource.c
index fb11a58b9594..dc15686b7a77 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -308,35 +308,37 @@ static int find_resource(struct resource *root, struct resource *new,
                          void *alignf_data)
 {
         struct resource *this = root->child;
+        resource_size_t start, end;
 
-        new->start = root->start;
+        start = root->start;
         /*
          * Skip past an allocated resource that starts at 0, since the assignment
          * of this->start - 1 to new->end below would cause an underflow.
          */
         if (this && this->start == 0) {
-                new->start = this->end + 1;
+                start = this->end + 1;
                 this = this->sibling;
         }
         for(;;) {
                 if (this)
-                        new->end = this->start - 1;
+                        end = this->start - 1;
                 else
-                        new->end = root->end;
-                if (new->start < min)
-                        new->start = min;
-                if (new->end > max)
-                        new->end = max;
-                new->start = ALIGN(new->start, align);
+                        end = root->end;
+                if (start < min)
+                        start = min;
+                if (end > max)
+                        end = max;
+                start = ALIGN(start, align);
                 if (alignf)
                         alignf(alignf_data, new, size, align);
-                if (new->start < new->end && new->end - new->start >= size - 1) {
-                        new->end = new->start + size - 1;
+                if (start < end && end - start >= size - 1) {
+                        new->start = start;
+                        new->end = start + size - 1;
                         return 0;
                 }
                 if (!this)
                         break;
-                new->start = this->end + 1;
+                start = this->end + 1;
                 this = this->sibling;
         }
         return -EBUSY;
diff --git a/kernel/rtmutex-debug.c b/kernel/rtmutex-debug.c
index 5fcb4fe645e2..ddabb54bb5c8 100644
--- a/kernel/rtmutex-debug.c
+++ b/kernel/rtmutex-debug.c
@@ -37,8 +37,8 @@ do {								\
         if (rt_trace_on) {                                      \
                 rt_trace_on = 0;                                \
                 console_verbose();                              \
-                if (spin_is_locked(&current->pi_lock))          \
-                        spin_unlock(&current->pi_lock);         \
+                if (raw_spin_is_locked(&current->pi_lock))      \
+                        raw_spin_unlock(&current->pi_lock);     \
         }                                                       \
 } while (0)
 
diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c
index 29bd4baf9e75..a9604815786a 100644
--- a/kernel/rtmutex.c
+++ b/kernel/rtmutex.c
@@ -138,9 +138,9 @@ static void rt_mutex_adjust_prio(struct task_struct *task)
 {
         unsigned long flags;
 
-        spin_lock_irqsave(&task->pi_lock, flags);
+        raw_spin_lock_irqsave(&task->pi_lock, flags);
         __rt_mutex_adjust_prio(task);
-        spin_unlock_irqrestore(&task->pi_lock, flags);
+        raw_spin_unlock_irqrestore(&task->pi_lock, flags);
 }
 
 /*
@@ -195,7 +195,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
         /*
          * Task can not go away as we did a get_task() before !
          */
-        spin_lock_irqsave(&task->pi_lock, flags);
+        raw_spin_lock_irqsave(&task->pi_lock, flags);
 
         waiter = task->pi_blocked_on;
         /*
@@ -231,8 +231,8 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
                 goto out_unlock_pi;
 
         lock = waiter->lock;
-        if (!spin_trylock(&lock->wait_lock)) {
-                spin_unlock_irqrestore(&task->pi_lock, flags);
+        if (!raw_spin_trylock(&lock->wait_lock)) {
+                raw_spin_unlock_irqrestore(&task->pi_lock, flags);
                 cpu_relax();
                 goto retry;
         }
@@ -240,7 +240,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
         /* Deadlock detection */
         if (lock == orig_lock || rt_mutex_owner(lock) == top_task) {
                 debug_rt_mutex_deadlock(deadlock_detect, orig_waiter, lock);
-                spin_unlock(&lock->wait_lock);
+                raw_spin_unlock(&lock->wait_lock);
                 ret = deadlock_detect ? -EDEADLK : 0;
                 goto out_unlock_pi;
         }
@@ -253,13 +253,13 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
         plist_add(&waiter->list_entry, &lock->wait_list);
 
         /* Release the task */
-        spin_unlock_irqrestore(&task->pi_lock, flags);
+        raw_spin_unlock_irqrestore(&task->pi_lock, flags);
         put_task_struct(task);
 
         /* Grab the next task */
         task = rt_mutex_owner(lock);
         get_task_struct(task);
-        spin_lock_irqsave(&task->pi_lock, flags);
+        raw_spin_lock_irqsave(&task->pi_lock, flags);
 
         if (waiter == rt_mutex_top_waiter(lock)) {
                 /* Boost the owner */
@@ -277,10 +277,10 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
                 __rt_mutex_adjust_prio(task);
         }
 
-        spin_unlock_irqrestore(&task->pi_lock, flags);
+        raw_spin_unlock_irqrestore(&task->pi_lock, flags);
 
         top_waiter = rt_mutex_top_waiter(lock);
-        spin_unlock(&lock->wait_lock);
+        raw_spin_unlock(&lock->wait_lock);
 
         if (!detect_deadlock && waiter != top_waiter)
                 goto out_put_task;
@@ -288,7 +288,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
         goto again;
 
  out_unlock_pi:
-        spin_unlock_irqrestore(&task->pi_lock, flags);
+        raw_spin_unlock_irqrestore(&task->pi_lock, flags);
  out_put_task:
         put_task_struct(task);
 
@@ -313,9 +313,9 @@ static inline int try_to_steal_lock(struct rt_mutex *lock,
         if (pendowner == task)
                 return 1;
 
-        spin_lock_irqsave(&pendowner->pi_lock, flags);
+        raw_spin_lock_irqsave(&pendowner->pi_lock, flags);
         if (task->prio >= pendowner->prio) {
-                spin_unlock_irqrestore(&pendowner->pi_lock, flags);
+                raw_spin_unlock_irqrestore(&pendowner->pi_lock, flags);
                 return 0;
         }
 
@@ -325,7 +325,7 @@ static inline int try_to_steal_lock(struct rt_mutex *lock,
          * priority.
          */
         if (likely(!rt_mutex_has_waiters(lock))) {
-                spin_unlock_irqrestore(&pendowner->pi_lock, flags);
+                raw_spin_unlock_irqrestore(&pendowner->pi_lock, flags);
                 return 1;
         }
 
@@ -333,7 +333,7 @@ static inline int try_to_steal_lock(struct rt_mutex *lock,
         next = rt_mutex_top_waiter(lock);
         plist_del(&next->pi_list_entry, &pendowner->pi_waiters);
         __rt_mutex_adjust_prio(pendowner);
-        spin_unlock_irqrestore(&pendowner->pi_lock, flags);
+        raw_spin_unlock_irqrestore(&pendowner->pi_lock, flags);
 
         /*
          * We are going to steal the lock and a waiter was
@@ -350,10 +350,10 @@ static inline int try_to_steal_lock(struct rt_mutex *lock,
          * might be task:
          */
         if (likely(next->task != task)) {
-                spin_lock_irqsave(&task->pi_lock, flags);
+                raw_spin_lock_irqsave(&task->pi_lock, flags);
                 plist_add(&next->pi_list_entry, &task->pi_waiters);
                 __rt_mutex_adjust_prio(task);
-                spin_unlock_irqrestore(&task->pi_lock, flags);
+                raw_spin_unlock_irqrestore(&task->pi_lock, flags);
         }
         return 1;
 }
@@ -420,7 +420,7 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
         unsigned long flags;
         int chain_walk = 0, res;
 
-        spin_lock_irqsave(&task->pi_lock, flags);
+        raw_spin_lock_irqsave(&task->pi_lock, flags);
         __rt_mutex_adjust_prio(task);
         waiter->task = task;
         waiter->lock = lock;
@@ -434,17 +434,17 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
 
         task->pi_blocked_on = waiter;
 
-        spin_unlock_irqrestore(&task->pi_lock, flags);
+        raw_spin_unlock_irqrestore(&task->pi_lock, flags);
 
         if (waiter == rt_mutex_top_waiter(lock)) {
-                spin_lock_irqsave(&owner->pi_lock, flags);
+                raw_spin_lock_irqsave(&owner->pi_lock, flags);
                 plist_del(&top_waiter->pi_list_entry, &owner->pi_waiters);
                 plist_add(&waiter->pi_list_entry, &owner->pi_waiters);
 
                 __rt_mutex_adjust_prio(owner);
                 if (owner->pi_blocked_on)
                         chain_walk = 1;
-                spin_unlock_irqrestore(&owner->pi_lock, flags);
+                raw_spin_unlock_irqrestore(&owner->pi_lock, flags);
         }
         else if (debug_rt_mutex_detect_deadlock(waiter, detect_deadlock))
                 chain_walk = 1;
@@ -459,12 +459,12 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
          */
         get_task_struct(owner);
 
-        spin_unlock(&lock->wait_lock);
+        raw_spin_unlock(&lock->wait_lock);
 
         res = rt_mutex_adjust_prio_chain(owner, detect_deadlock, lock, waiter,
                                          task);
 
-        spin_lock(&lock->wait_lock);
+        raw_spin_lock(&lock->wait_lock);
 
         return res;
 }
@@ -483,7 +483,7 @@ static void wakeup_next_waiter(struct rt_mutex *lock)
         struct task_struct *pendowner;
         unsigned long flags;
 
-        spin_lock_irqsave(&current->pi_lock, flags);
+        raw_spin_lock_irqsave(&current->pi_lock, flags);
 
         waiter = rt_mutex_top_waiter(lock);
         plist_del(&waiter->list_entry, &lock->wait_list);
@@ -500,7 +500,7 @@ static void wakeup_next_waiter(struct rt_mutex *lock)
 
         rt_mutex_set_owner(lock, pendowner, RT_MUTEX_OWNER_PENDING);
 
-        spin_unlock_irqrestore(&current->pi_lock, flags);
+        raw_spin_unlock_irqrestore(&current->pi_lock, flags);
 
         /*
          * Clear the pi_blocked_on variable and enqueue a possible
@@ -509,7 +509,7 @@ static void wakeup_next_waiter(struct rt_mutex *lock)
          * waiter with higher priority than pending-owner->normal_prio
          * is blocked on the unboosted (pending) owner.
          */
-        spin_lock_irqsave(&pendowner->pi_lock, flags);
+        raw_spin_lock_irqsave(&pendowner->pi_lock, flags);
 
         WARN_ON(!pendowner->pi_blocked_on);
         WARN_ON(pendowner->pi_blocked_on != waiter);
@@ -523,7 +523,7 @@ static void wakeup_next_waiter(struct rt_mutex *lock)
                 next = rt_mutex_top_waiter(lock);
                 plist_add(&next->pi_list_entry, &pendowner->pi_waiters);
         }
-        spin_unlock_irqrestore(&pendowner->pi_lock, flags);
+        raw_spin_unlock_irqrestore(&pendowner->pi_lock, flags);
 
         wake_up_process(pendowner);
 }
@@ -541,15 +541,15 @@ static void remove_waiter(struct rt_mutex *lock,
         unsigned long flags;
         int chain_walk = 0;
 
-        spin_lock_irqsave(&current->pi_lock, flags);
+        raw_spin_lock_irqsave(&current->pi_lock, flags);
         plist_del(&waiter->list_entry, &lock->wait_list);
         waiter->task = NULL;
         current->pi_blocked_on = NULL;
-        spin_unlock_irqrestore(&current->pi_lock, flags);
+        raw_spin_unlock_irqrestore(&current->pi_lock, flags);
 
         if (first && owner != current) {
 
-                spin_lock_irqsave(&owner->pi_lock, flags);
+                raw_spin_lock_irqsave(&owner->pi_lock, flags);
 
                 plist_del(&waiter->pi_list_entry, &owner->pi_waiters);
 
@@ -564,7 +564,7 @@ static void remove_waiter(struct rt_mutex *lock,
                 if (owner->pi_blocked_on)
                         chain_walk = 1;
 
-                spin_unlock_irqrestore(&owner->pi_lock, flags);
+                raw_spin_unlock_irqrestore(&owner->pi_lock, flags);
         }
 
         WARN_ON(!plist_node_empty(&waiter->pi_list_entry));
@@ -575,11 +575,11 @@ static void remove_waiter(struct rt_mutex *lock,
         /* gets dropped in rt_mutex_adjust_prio_chain()! */
         get_task_struct(owner);
 
-        spin_unlock(&lock->wait_lock);
+        raw_spin_unlock(&lock->wait_lock);
 
         rt_mutex_adjust_prio_chain(owner, 0, lock, NULL, current);
 
-        spin_lock(&lock->wait_lock);
+        raw_spin_lock(&lock->wait_lock);
 }
 
 /*
@@ -592,15 +592,15 @@ void rt_mutex_adjust_pi(struct task_struct *task)
         struct rt_mutex_waiter *waiter;
         unsigned long flags;
 
-        spin_lock_irqsave(&task->pi_lock, flags);
+        raw_spin_lock_irqsave(&task->pi_lock, flags);
 
         waiter = task->pi_blocked_on;
         if (!waiter || waiter->list_entry.prio == task->prio) {
-                spin_unlock_irqrestore(&task->pi_lock, flags);
+                raw_spin_unlock_irqrestore(&task->pi_lock, flags);
                 return;
         }
 
-        spin_unlock_irqrestore(&task->pi_lock, flags);
+        raw_spin_unlock_irqrestore(&task->pi_lock, flags);
 
         /* gets dropped in rt_mutex_adjust_prio_chain()! */
         get_task_struct(task);
@@ -672,14 +672,14 @@ __rt_mutex_slowlock(struct rt_mutex *lock, int state,
                                 break;
                 }
 
-                spin_unlock(&lock->wait_lock);
+                raw_spin_unlock(&lock->wait_lock);
 
                 debug_rt_mutex_print_deadlock(waiter);
 
                 if (waiter->task)
                         schedule_rt_mutex(lock);
 
-                spin_lock(&lock->wait_lock);
+                raw_spin_lock(&lock->wait_lock);
                 set_current_state(state);
         }
 
@@ -700,11 +700,11 @@ rt_mutex_slowlock(struct rt_mutex *lock, int state,
         debug_rt_mutex_init_waiter(&waiter);
         waiter.task = NULL;
 
-        spin_lock(&lock->wait_lock);
+        raw_spin_lock(&lock->wait_lock);
 
         /* Try to acquire the lock again: */
         if (try_to_take_rt_mutex(lock)) {
-                spin_unlock(&lock->wait_lock);
+                raw_spin_unlock(&lock->wait_lock);
                 return 0;
         }
 
@@ -731,7 +731,7 @@ rt_mutex_slowlock(struct rt_mutex *lock, int state,
          */
         fixup_rt_mutex_waiters(lock);
 
-        spin_unlock(&lock->wait_lock);
+        raw_spin_unlock(&lock->wait_lock);
 
         /* Remove pending timer: */
         if (unlikely(timeout))
@@ -758,7 +758,7 @@ rt_mutex_slowtrylock(struct rt_mutex *lock)
 {
         int ret = 0;
 
-        spin_lock(&lock->wait_lock);
+        raw_spin_lock(&lock->wait_lock);
 
         if (likely(rt_mutex_owner(lock) != current)) {
 
@@ -770,7 +770,7 @@ rt_mutex_slowtrylock(struct rt_mutex *lock)
                 fixup_rt_mutex_waiters(lock);
         }
 
-        spin_unlock(&lock->wait_lock);
+        raw_spin_unlock(&lock->wait_lock);
 
         return ret;
 }
@@ -781,7 +781,7 @@ rt_mutex_slowtrylock(struct rt_mutex *lock)
 static void __sched
 rt_mutex_slowunlock(struct rt_mutex *lock)
 {
-        spin_lock(&lock->wait_lock);
+        raw_spin_lock(&lock->wait_lock);
 
         debug_rt_mutex_unlock(lock);
 
@@ -789,13 +789,13 @@ rt_mutex_slowunlock(struct rt_mutex *lock)
 
         if (!rt_mutex_has_waiters(lock)) {
                 lock->owner = NULL;
-                spin_unlock(&lock->wait_lock);
+                raw_spin_unlock(&lock->wait_lock);
                 return;
         }
 
         wakeup_next_waiter(lock);
 
-        spin_unlock(&lock->wait_lock);
+        raw_spin_unlock(&lock->wait_lock);
 
         /* Undo pi boosting if necessary: */
         rt_mutex_adjust_prio(current);
@@ -970,8 +970,8 @@ EXPORT_SYMBOL_GPL(rt_mutex_destroy);
 void __rt_mutex_init(struct rt_mutex *lock, const char *name)
 {
         lock->owner = NULL;
-        spin_lock_init(&lock->wait_lock);
-        plist_head_init(&lock->wait_list, &lock->wait_lock);
+        raw_spin_lock_init(&lock->wait_lock);
+        plist_head_init_raw(&lock->wait_list, &lock->wait_lock);
 
         debug_rt_mutex_init(lock, name);
 }
@@ -1032,7 +1032,7 @@ int rt_mutex_start_proxy_lock(struct rt_mutex *lock,
 {
         int ret;
 
-        spin_lock(&lock->wait_lock);
+        raw_spin_lock(&lock->wait_lock);
 
         mark_rt_mutex_waiters(lock);
 
@@ -1040,7 +1040,7 @@ int rt_mutex_start_proxy_lock(struct rt_mutex *lock,
                 /* We got the lock for task. */
                 debug_rt_mutex_lock(lock);
                 rt_mutex_set_owner(lock, task, 0);
-                spin_unlock(&lock->wait_lock);
+                raw_spin_unlock(&lock->wait_lock);
                 rt_mutex_deadlock_account_lock(lock, task);
                 return 1;
         }
@@ -1056,7 +1056,7 @@ int rt_mutex_start_proxy_lock(struct rt_mutex *lock,
                  */
                 ret = 0;
         }
-        spin_unlock(&lock->wait_lock);
+        raw_spin_unlock(&lock->wait_lock);
 
         debug_rt_mutex_print_deadlock(waiter);
 
@@ -1106,7 +1106,7 @@ int rt_mutex_finish_proxy_lock(struct rt_mutex *lock,
 {
         int ret;
 
-        spin_lock(&lock->wait_lock);
+        raw_spin_lock(&lock->wait_lock);
 
         set_current_state(TASK_INTERRUPTIBLE);
 
@@ -1124,7 +1124,7 @@ int rt_mutex_finish_proxy_lock(struct rt_mutex *lock,
          */
         fixup_rt_mutex_waiters(lock);
 
-        spin_unlock(&lock->wait_lock);
+        raw_spin_unlock(&lock->wait_lock);
 
         /*
          * Readjust priority, when we did not get the lock. We might have been
diff --git a/kernel/sched.c b/kernel/sched.c
index 3c11ae0a948d..18cceeecce35 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -141,7 +141,7 @@ struct rt_prio_array {
 
 struct rt_bandwidth {
         /* nests inside the rq lock: */
-        spinlock_t              rt_runtime_lock;
+        raw_spinlock_t          rt_runtime_lock;
         ktime_t                 rt_period;
         u64                     rt_runtime;
         struct hrtimer          rt_period_timer;
@@ -178,7 +178,7 @@ void init_rt_bandwidth(struct rt_bandwidth *rt_b, u64 period, u64 runtime)
         rt_b->rt_period = ns_to_ktime(period);
         rt_b->rt_runtime = runtime;
 
-        spin_lock_init(&rt_b->rt_runtime_lock);
+        raw_spin_lock_init(&rt_b->rt_runtime_lock);
 
         hrtimer_init(&rt_b->rt_period_timer,
                         CLOCK_MONOTONIC, HRTIMER_MODE_REL);
@@ -200,7 +200,7 @@ static void start_rt_bandwidth(struct rt_bandwidth *rt_b)
         if (hrtimer_active(&rt_b->rt_period_timer))
                 return;
 
-        spin_lock(&rt_b->rt_runtime_lock);
+        raw_spin_lock(&rt_b->rt_runtime_lock);
         for (;;) {
                 unsigned long delta;
                 ktime_t soft, hard;
@@ -217,7 +217,7 @@ static void start_rt_bandwidth(struct rt_bandwidth *rt_b)
                 __hrtimer_start_range_ns(&rt_b->rt_period_timer, soft, delta,
                                 HRTIMER_MODE_ABS_PINNED, 0);
         }
-        spin_unlock(&rt_b->rt_runtime_lock);
+        raw_spin_unlock(&rt_b->rt_runtime_lock);
 }
 
 #ifdef CONFIG_RT_GROUP_SCHED
@@ -298,7 +298,7 @@ static DEFINE_PER_CPU_SHARED_ALIGNED(struct cfs_rq, init_tg_cfs_rq);
 
 #ifdef CONFIG_RT_GROUP_SCHED
 static DEFINE_PER_CPU(struct sched_rt_entity, init_sched_rt_entity);
-static DEFINE_PER_CPU_SHARED_ALIGNED(struct rt_rq, init_rt_rq);
+static DEFINE_PER_CPU_SHARED_ALIGNED(struct rt_rq, init_rt_rq_var);
 #endif /* CONFIG_RT_GROUP_SCHED */
 #else /* !CONFIG_USER_SCHED */
 #define root_task_group init_task_group
@@ -470,7 +470,7 @@ struct rt_rq {
         u64 rt_time;
         u64 rt_runtime;
         /* Nests inside the rq lock: */
-        spinlock_t rt_runtime_lock;
+        raw_spinlock_t rt_runtime_lock;
 
 #ifdef CONFIG_RT_GROUP_SCHED
         unsigned long rt_nr_boosted;
@@ -525,7 +525,7 @@ static struct root_domain def_root_domain;
  */
 struct rq {
         /* runqueue lock: */
-        spinlock_t lock;
+        raw_spinlock_t lock;
 
         /*
          * nr_running and cpu_load should be in the same cacheline because
@@ -535,14 +535,12 @@ struct rq {
         #define CPU_LOAD_IDX_MAX 5
         unsigned long cpu_load[CPU_LOAD_IDX_MAX];
 #ifdef CONFIG_NO_HZ
-        unsigned long last_tick_seen;
         unsigned char in_nohz_recently;
 #endif
         /* capture load from *all* tasks on this cpu: */
         struct load_weight load;
         unsigned long nr_load_updates;
         u64 nr_switches;
-        u64 nr_migrations_in;
 
         struct cfs_rq cfs;
         struct rt_rq rt;
@@ -591,6 +589,8 @@ struct rq {
 
         u64 rt_avg;
         u64 age_stamp;
+        u64 idle_stamp;
+        u64 avg_idle;
 #endif
 
         /* calc_load related fields */
@@ -685,7 +685,7 @@ inline void update_rq_clock(struct rq *rq)
  */
 int runqueue_is_locked(int cpu)
 {
-        return spin_is_locked(&cpu_rq(cpu)->lock);
+        return raw_spin_is_locked(&cpu_rq(cpu)->lock);
 }
 
 /*
@@ -772,7 +772,7 @@ sched_feat_write(struct file *filp, const char __user *ubuf,
         if (!sched_feat_names[i])
                 return -EINVAL;
 
-        filp->f_pos += cnt;
+        *ppos += cnt;
 
         return cnt;
 }
@@ -814,6 +814,7 @@ const_debug unsigned int sysctl_sched_nr_migrate = 32;
  * default: 0.25ms
  */
 unsigned int sysctl_sched_shares_ratelimit = 250000;
+unsigned int normalized_sysctl_sched_shares_ratelimit = 250000;
 
 /*
  * Inject some fuzzyness into changing the per-cpu group shares
@@ -892,7 +893,7 @@ static inline void finish_lock_switch(struct rq *rq, struct task_struct *prev)
          */
         spin_acquire(&rq->lock.dep_map, 0, 0, _THIS_IP_);
 
-        spin_unlock_irq(&rq->lock);
+        raw_spin_unlock_irq(&rq->lock);
 }
 
 #else /* __ARCH_WANT_UNLOCKED_CTXSW */
@@ -916,9 +917,9 @@ static inline void prepare_lock_switch(struct rq *rq, struct task_struct *next)
         next->oncpu = 1;
 #endif
 #ifdef __ARCH_WANT_INTERRUPTS_ON_CTXSW
-        spin_unlock_irq(&rq->lock);
+        raw_spin_unlock_irq(&rq->lock);
 #else
-        spin_unlock(&rq->lock);
+        raw_spin_unlock(&rq->lock);
 #endif
 }
 
@@ -948,10 +949,10 @@ static inline struct rq *__task_rq_lock(struct task_struct *p)
 {
         for (;;) {
                 struct rq *rq = task_rq(p);
-                spin_lock(&rq->lock);
+                raw_spin_lock(&rq->lock);
                 if (likely(rq == task_rq(p)))
                         return rq;
-                spin_unlock(&rq->lock);
+                raw_spin_unlock(&rq->lock);
         }
 }
 
@@ -968,10 +969,10 @@ static struct rq *task_rq_lock(struct task_struct *p, unsigned long *flags)
         for (;;) {
                 local_irq_save(*flags);
                 rq = task_rq(p);
-                spin_lock(&rq->lock);
+                raw_spin_lock(&rq->lock);
                 if (likely(rq == task_rq(p)))
                         return rq;
-                spin_unlock_irqrestore(&rq->lock, *flags);
+                raw_spin_unlock_irqrestore(&rq->lock, *flags);
         }
 }
 
@@ -980,19 +981,19 @@ void task_rq_unlock_wait(struct task_struct *p)
         struct rq *rq = task_rq(p);
 
         smp_mb(); /* spin-unlock-wait is not a full memory barrier */
-        spin_unlock_wait(&rq->lock);
+        raw_spin_unlock_wait(&rq->lock);
 }
 
 static void __task_rq_unlock(struct rq *rq)
         __releases(rq->lock)
 {
-        spin_unlock(&rq->lock);
+        raw_spin_unlock(&rq->lock);
 }
 
 static inline void task_rq_unlock(struct rq *rq, unsigned long *flags)
         __releases(rq->lock)
 {
-        spin_unlock_irqrestore(&rq->lock, *flags);
+        raw_spin_unlock_irqrestore(&rq->lock, *flags);
 }
 
 /*
@@ -1005,7 +1006,7 @@ static struct rq *this_rq_lock(void)
 
         local_irq_disable();
         rq = this_rq();
-        spin_lock(&rq->lock);
+        raw_spin_lock(&rq->lock);
 
         return rq;
 }
@@ -1052,10 +1053,10 @@ static enum hrtimer_restart hrtick(struct hrtimer *timer)
 
         WARN_ON_ONCE(cpu_of(rq) != smp_processor_id());
 
-        spin_lock(&rq->lock);
+        raw_spin_lock(&rq->lock);
         update_rq_clock(rq);
         rq->curr->sched_class->task_tick(rq, rq->curr, 1);
-        spin_unlock(&rq->lock);
+        raw_spin_unlock(&rq->lock);
 
         return HRTIMER_NORESTART;
 }
@@ -1068,10 +1069,10 @@ static void __hrtick_start(void *arg)
 {
         struct rq *rq = arg;
 
-        spin_lock(&rq->lock);
+        raw_spin_lock(&rq->lock);
         hrtimer_restart(&rq->hrtick_timer);
         rq->hrtick_csd_pending = 0;
-        spin_unlock(&rq->lock);
+        raw_spin_unlock(&rq->lock);
 }
 
 /*
@@ -1178,7 +1179,7 @@ static void resched_task(struct task_struct *p)
 {
         int cpu;
 
-        assert_spin_locked(&task_rq(p)->lock);
+        assert_raw_spin_locked(&task_rq(p)->lock);
 
         if (test_tsk_need_resched(p))
                 return;
@@ -1200,10 +1201,10 @@ static void resched_cpu(int cpu)
         struct rq *rq = cpu_rq(cpu);
         unsigned long flags;
 
-        if (!spin_trylock_irqsave(&rq->lock, flags))
+        if (!raw_spin_trylock_irqsave(&rq->lock, flags))
                 return;
         resched_task(cpu_curr(cpu));
-        spin_unlock_irqrestore(&rq->lock, flags);
+        raw_spin_unlock_irqrestore(&rq->lock, flags);
 }
 
 #ifdef CONFIG_NO_HZ
@@ -1272,7 +1273,7 @@ static void sched_rt_avg_update(struct rq *rq, u64 rt_delta)
 #else /* !CONFIG_SMP */
 static void resched_task(struct task_struct *p)
 {
-        assert_spin_locked(&task_rq(p)->lock);
+        assert_raw_spin_locked(&task_rq(p)->lock);
         set_tsk_need_resched(p);
 }
 
@@ -1599,11 +1600,11 @@ static void update_group_shares_cpu(struct task_group *tg, int cpu,
                 struct rq *rq = cpu_rq(cpu);
                 unsigned long flags;
 
-                spin_lock_irqsave(&rq->lock, flags);
+                raw_spin_lock_irqsave(&rq->lock, flags);
                 tg->cfs_rq[cpu]->rq_weight = boost ? 0 : rq_weight;
                 tg->cfs_rq[cpu]->shares = boost ? 0 : shares;
                 __set_se_shares(tg->se[cpu], shares);
-                spin_unlock_irqrestore(&rq->lock, flags);
+                raw_spin_unlock_irqrestore(&rq->lock, flags);
         }
 }
 
@@ -1614,7 +1615,7 @@ static void update_group_shares_cpu(struct task_group *tg, int cpu,
  */
 static int tg_shares_up(struct task_group *tg, void *data)
 {
-        unsigned long weight, rq_weight = 0, shares = 0;
+        unsigned long weight, rq_weight = 0, sum_weight = 0, shares = 0;
         unsigned long *usd_rq_weight;
         struct sched_domain *sd = data;
         unsigned long flags;
@@ -1630,6 +1631,7 @@ static int tg_shares_up(struct task_group *tg, void *data)
                 weight = tg->cfs_rq[i]->load.weight;
                 usd_rq_weight[i] = weight;
 
+                rq_weight += weight;
                 /*
                  * If there are currently no tasks on the cpu pretend there
                  * is one of average load so that when a new task gets to
@@ -1638,10 +1640,13 @@ static int tg_shares_up(struct task_group *tg, void *data)
                 if (!weight)
                         weight = NICE_0_LOAD;
 
-                rq_weight += weight;
+                sum_weight += weight;
                 shares += tg->cfs_rq[i]->shares;
         }
 
+        if (!rq_weight)
+                rq_weight = sum_weight;
+
         if ((!shares && rq_weight) || shares > tg->shares)
                 shares = tg->shares;
 
@@ -1701,9 +1706,9 @@ static void update_shares_locked(struct rq *rq, struct sched_domain *sd)
         if (root_task_group_empty())
                 return;
 
-        spin_unlock(&rq->lock);
+        raw_spin_unlock(&rq->lock);
         update_shares(sd);
-        spin_lock(&rq->lock);
+        raw_spin_lock(&rq->lock);
 }
 
 static void update_h_load(long cpu)
@@ -1743,7 +1748,7 @@ static inline int _double_lock_balance(struct rq *this_rq, struct rq *busiest)
         __acquires(busiest->lock)
         __acquires(this_rq->lock)
 {
-        spin_unlock(&this_rq->lock);
+        raw_spin_unlock(&this_rq->lock);
         double_rq_lock(this_rq, busiest);
 
         return 1;
@@ -1764,14 +1769,16 @@ static int _double_lock_balance(struct rq *this_rq, struct rq *busiest)
 {
         int ret = 0;
 
-        if (unlikely(!spin_trylock(&busiest->lock))) {
+        if (unlikely(!raw_spin_trylock(&busiest->lock))) {
                 if (busiest < this_rq) {
-                        spin_unlock(&this_rq->lock);
-                        spin_lock(&busiest->lock);
-                        spin_lock_nested(&this_rq->lock, SINGLE_DEPTH_NESTING);
+                        raw_spin_unlock(&this_rq->lock);
+                        raw_spin_lock(&busiest->lock);
+                        raw_spin_lock_nested(&this_rq->lock,
+                                              SINGLE_DEPTH_NESTING);
                         ret = 1;
                 } else
-                        spin_lock_nested(&busiest->lock, SINGLE_DEPTH_NESTING);
+                        raw_spin_lock_nested(&busiest->lock,
+                                              SINGLE_DEPTH_NESTING);
         }
         return ret;
 }
@@ -1785,7 +1792,7 @@ static int double_lock_balance(struct rq *this_rq, struct rq *busiest)
 {
         if (unlikely(!irqs_disabled())) {
                 /* printk() doesn't work good under rq->lock */
-                spin_unlock(&this_rq->lock);
+                raw_spin_unlock(&this_rq->lock);
                 BUG_ON(1);
         }
 
@@ -1795,7 +1802,7 @@ static int double_lock_balance(struct rq *this_rq, struct rq *busiest)
 static inline void double_unlock_balance(struct rq *this_rq, struct rq *busiest)
         __releases(busiest->lock)
 {
-        spin_unlock(&busiest->lock);
+        raw_spin_unlock(&busiest->lock);
         lock_set_subclass(&this_rq->lock.dep_map, 0, _RET_IP_);
 }
 #endif
@@ -1810,6 +1817,22 @@ static void cfs_rq_set_shares(struct cfs_rq *cfs_rq, unsigned long shares)
 #endif
 
 static void calc_load_account_active(struct rq *this_rq);
+static void update_sysctl(void);
+static int get_update_sysctl_factor(void);
+
+static inline void __set_task_cpu(struct task_struct *p, unsigned int cpu)
+{
+        set_task_rq(p, cpu);
+#ifdef CONFIG_SMP
+        /*
+         * After ->cpu is set up to a new value, task_rq_lock(p, ...) can be
+         * successfuly executed on another CPU. We must ensure that updates of
+         * per-task data have been completed by this moment.
+         */
+        smp_wmb();
+        task_thread_info(p)->cpu = cpu;
+#endif
+}
 
 #include "sched_stats.h"
 #include "sched_idletask.c"
@@ -1967,20 +1990,6 @@ inline int task_curr(const struct task_struct *p)
         return cpu_curr(task_cpu(p)) == p;
 }
 
-static inline void __set_task_cpu(struct task_struct *p, unsigned int cpu)
-{
-        set_task_rq(p, cpu);
-#ifdef CONFIG_SMP
-        /*
-         * After ->cpu is set up to a new value, task_rq_lock(p, ...) can be
-         * successfuly executed on another CPU. We must ensure that updates of
-         * per-task data have been completed by this moment.
-         */
-        smp_wmb();
-        task_thread_info(p)->cpu = cpu;
-#endif
-}
-
 static inline void check_class_changed(struct rq *rq, struct task_struct *p,
                                        const struct sched_class *prev_class,
                                        int oldprio, int running)
@@ -2016,12 +2025,13 @@ void kthread_bind(struct task_struct *p, unsigned int cpu)
                 return;
         }
 
-        spin_lock_irqsave(&rq->lock, flags);
+        raw_spin_lock_irqsave(&rq->lock, flags);
+        update_rq_clock(rq);
         set_task_cpu(p, cpu);
         p->cpus_allowed = cpumask_of_cpu(cpu);
         p->rt.nr_cpus_allowed = 1;
         p->flags |= PF_THREAD_BOUND;
-        spin_unlock_irqrestore(&rq->lock, flags);
+        raw_spin_unlock_irqrestore(&rq->lock, flags);
 }
 EXPORT_SYMBOL(kthread_bind);
 
@@ -2059,30 +2069,13 @@ task_hot(struct task_struct *p, u64 now, struct sched_domain *sd)
 void set_task_cpu(struct task_struct *p, unsigned int new_cpu)
 {
         int old_cpu = task_cpu(p);
-        struct rq *old_rq = cpu_rq(old_cpu), *new_rq = cpu_rq(new_cpu);
         struct cfs_rq *old_cfsrq = task_cfs_rq(p),
                       *new_cfsrq = cpu_cfs_rq(old_cfsrq, new_cpu);
-        u64 clock_offset;
-
-        clock_offset = old_rq->clock - new_rq->clock;
 
         trace_sched_migrate_task(p, new_cpu);
 
-#ifdef CONFIG_SCHEDSTATS
-        if (p->se.wait_start)
-                p->se.wait_start -= clock_offset;
-        if (p->se.sleep_start)
-                p->se.sleep_start -= clock_offset;
-        if (p->se.block_start)
-                p->se.block_start -= clock_offset;
-#endif
         if (old_cpu != new_cpu) {
                 p->se.nr_migrations++;
-                new_rq->nr_migrations_in++;
-#ifdef CONFIG_SCHEDSTATS
-                if (task_hot(p, old_rq->clock, NULL))
-                        schedstat_inc(p, se.nr_forced2_migrations);
-#endif
                 perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS,
                                      1, 1, NULL, 0);
         }
@@ -2115,6 +2108,7 @@ migrate_task(struct task_struct *p, int dest_cpu, struct migration_req *req)
          * it is sufficient to simply update the task's cpu field.
          */
         if (!p->se.on_rq && !task_running(rq, p)) {
+                update_rq_clock(rq);
                 set_task_cpu(p, dest_cpu);
                 return 0;
         }
@@ -2322,6 +2316,14 @@ void task_oncpu_function_call(struct task_struct *p,
         preempt_enable();
 }
 
+#ifdef CONFIG_SMP
+static inline
+int select_task_rq(struct task_struct *p, int sd_flags, int wake_flags)
+{
+        return p->sched_class->select_task_rq(p, sd_flags, wake_flags);
+}
+#endif
+
 /***
  * try_to_wake_up - wake up a thread
  * @p: the to-be-woken-up thread
@@ -2373,16 +2375,14 @@ static int try_to_wake_up(struct task_struct *p, unsigned int state,
         if (task_contributes_to_load(p))
                 rq->nr_uninterruptible--;
         p->state = TASK_WAKING;
-        task_rq_unlock(rq, &flags);
+        __task_rq_unlock(rq);
 
-        cpu = p->sched_class->select_task_rq(p, SD_BALANCE_WAKE, wake_flags);
+        cpu = select_task_rq(p, SD_BALANCE_WAKE, wake_flags);
         if (cpu != orig_cpu)
                 set_task_cpu(p, cpu);
 
-        rq = task_rq_lock(p, &flags);
-
-        if (rq != orig_rq)
-                update_rq_clock(rq);
+        rq = __task_rq_lock(p);
+        update_rq_clock(rq);
 
         WARN_ON(p->state != TASK_WAKING);
         cpu = task_cpu(p);
@@ -2440,6 +2440,17 @@ out_running:
 #ifdef CONFIG_SMP
         if (p->sched_class->task_wake_up)
                 p->sched_class->task_wake_up(rq, p);
+
+        if (unlikely(rq->idle_stamp)) {
+                u64 delta = rq->clock - rq->idle_stamp;
+                u64 max = 2*sysctl_sched_migration_cost;
+
+                if (delta > max)
+                        rq->avg_idle = max;
+                else
+                        update_avg(&rq->avg_idle, delta);
+                rq->idle_stamp = 0;
+        }
 #endif
 out:
         task_rq_unlock(rq, &flags);
@@ -2486,7 +2497,6 @@ static void __sched_fork(struct task_struct *p)
         p->se.avg_overlap               = 0;
         p->se.start_runtime             = 0;
         p->se.avg_wakeup                = sysctl_sched_wakeup_granularity;
-        p->se.avg_running               = 0;
 
 #ifdef CONFIG_SCHEDSTATS
         p->se.wait_start                        = 0;
@@ -2508,7 +2518,6 @@ static void __sched_fork(struct task_struct *p)
         p->se.nr_failed_migrations_running      = 0;
         p->se.nr_failed_migrations_hot          = 0;
         p->se.nr_forced_migrations              = 0;
-        p->se.nr_forced2_migrations             = 0;
 
         p->se.nr_wakeups                        = 0;
         p->se.nr_wakeups_sync                   = 0;
@@ -2578,8 +2587,11 @@ void sched_fork(struct task_struct *p, int clone_flags)
         if (!rt_prio(p->prio))
                 p->sched_class = &fair_sched_class;
 
+        if (p->sched_class->task_fork)
+                p->sched_class->task_fork(p);
+
 #ifdef CONFIG_SMP
-        cpu = p->sched_class->select_task_rq(p, SD_BALANCE_FORK, 0);
+        cpu = select_task_rq(p, SD_BALANCE_FORK, 0);
 #endif
         set_task_cpu(p, cpu);
 
@@ -2614,17 +2626,7 @@ void wake_up_new_task(struct task_struct *p, unsigned long clone_flags)
         rq = task_rq_lock(p, &flags);
         BUG_ON(p->state != TASK_RUNNING);
         update_rq_clock(rq);
-
-        if (!p->sched_class->task_new || !current->se.on_rq) {
-                activate_task(rq, p, 0);
-        } else {
-                /*
-                 * Let the scheduling class do new task startup
-                 * management (if any):
-                 */
-                p->sched_class->task_new(rq, p);
-                inc_nr_running(rq);
-        }
+        activate_task(rq, p, 0);
         trace_sched_wakeup_new(rq, p, 1);
         check_preempt_curr(rq, p, WF_FORK);
 #ifdef CONFIG_SMP
@@ -2781,10 +2783,10 @@ static inline void post_schedule(struct rq *rq)
         if (rq->post_schedule) {
                 unsigned long flags;
 
-                spin_lock_irqsave(&rq->lock, flags);
+                raw_spin_lock_irqsave(&rq->lock, flags);
                 if (rq->curr->sched_class->post_schedule)
                         rq->curr->sched_class->post_schedule(rq);
-                spin_unlock_irqrestore(&rq->lock, flags);
+                raw_spin_unlock_irqrestore(&rq->lock, flags);
 
                 rq->post_schedule = 0;
         }
@@ -2848,14 +2850,14 @@ context_switch(struct rq *rq, struct task_struct *prev,
          */
         arch_start_context_switch(prev);
 
-        if (unlikely(!mm)) {
+        if (likely(!mm)) {
                 next->active_mm = oldmm;
                 atomic_inc(&oldmm->mm_count);
                 enter_lazy_tlb(oldmm, next);
         } else
                 switch_mm(oldmm, mm, next);
 
-        if (unlikely(!prev->mm)) {
+        if (likely(!prev->mm)) {
                 prev->active_mm = NULL;
                 rq->prev_mm = oldmm;
         }
@@ -3018,15 +3020,6 @@ static void calc_load_account_active(struct rq *this_rq)
 }
 
 /*
- * Externally visible per-cpu scheduler statistics:
- * cpu_nr_migrations(cpu) - number of migrations into that cpu
- */
-u64 cpu_nr_migrations(int cpu)
-{
-        return cpu_rq(cpu)->nr_migrations_in;
-}
-
-/*
  * Update rq->cpu_load[] statistics. This function is usually called every
  * scheduler tick (TICK_NSEC).
  */
@@ -3075,15 +3068,15 @@ static void double_rq_lock(struct rq *rq1, struct rq *rq2)
 {
         BUG_ON(!irqs_disabled());
         if (rq1 == rq2) {
-                spin_lock(&rq1->lock);
+                raw_spin_lock(&rq1->lock);
                 __acquire(rq2->lock);   /* Fake it out ;) */
         } else {
                 if (rq1 < rq2) {
-                        spin_lock(&rq1->lock);
-                        spin_lock_nested(&rq2->lock, SINGLE_DEPTH_NESTING);
+                        raw_spin_lock(&rq1->lock);
+                        raw_spin_lock_nested(&rq2->lock, SINGLE_DEPTH_NESTING);
                 } else {
-                        spin_lock(&rq2->lock);
-                        spin_lock_nested(&rq1->lock, SINGLE_DEPTH_NESTING);
+                        raw_spin_lock(&rq2->lock);
+                        raw_spin_lock_nested(&rq1->lock, SINGLE_DEPTH_NESTING);
                 }
         }
         update_rq_clock(rq1);
@@ -3100,9 +3093,9 @@ static void double_rq_unlock(struct rq *rq1, struct rq *rq2)
         __releases(rq1->lock)
         __releases(rq2->lock)
 {
-        spin_unlock(&rq1->lock);
+        raw_spin_unlock(&rq1->lock);
         if (rq1 != rq2)
-                spin_unlock(&rq2->lock);
+                raw_spin_unlock(&rq2->lock);
         else
                 __release(rq2->lock);
 }
@@ -3148,7 +3141,7 @@ out:
 void sched_exec(void)
 {
         int new_cpu, this_cpu = get_cpu();
-        new_cpu = current->sched_class->select_task_rq(current, SD_BALANCE_EXEC, 0);
+        new_cpu = select_task_rq(current, SD_BALANCE_EXEC, 0);
         put_cpu();
         if (new_cpu != this_cpu)
                 sched_migrate_task(current, new_cpu);
@@ -3164,10 +3157,6 @@ static void pull_task(struct rq *src_rq, struct task_struct *p,
         deactivate_task(src_rq, p, 0);
         set_task_cpu(p, this_cpu);
         activate_task(this_rq, p, 0);
-        /*
-         * Note that idle threads have a prio of MAX_PRIO, for this test
-         * to be always true for them.
-         */
         check_preempt_curr(this_rq, p, 0);
 }
 
@@ -4126,7 +4115,7 @@ static int load_balance(int this_cpu, struct rq *this_rq,
         unsigned long flags;
         struct cpumask *cpus = __get_cpu_var(load_balance_tmpmask);
 
-        cpumask_setall(cpus);
+        cpumask_copy(cpus, cpu_active_mask);
 
         /*
          * When power savings policy is enabled for the parent domain, idle
@@ -4199,14 +4188,15 @@ redo:
 
                 if (unlikely(sd->nr_balance_failed > sd->cache_nice_tries+2)) {
 
-                        spin_lock_irqsave(&busiest->lock, flags);
+                        raw_spin_lock_irqsave(&busiest->lock, flags);
 
                         /* don't kick the migration_thread, if the curr
                          * task on busiest cpu can't be moved to this_cpu
                          */
                         if (!cpumask_test_cpu(this_cpu,
                                               &busiest->curr->cpus_allowed)) {
-                                spin_unlock_irqrestore(&busiest->lock, flags);
+                                raw_spin_unlock_irqrestore(&busiest->lock,
+                                                            flags);
                                 all_pinned = 1;
                                 goto out_one_pinned;
                         }
@@ -4216,7 +4206,7 @@ redo:
                                 busiest->push_cpu = this_cpu;
                                 active_balance = 1;
                         }
-                        spin_unlock_irqrestore(&busiest->lock, flags);
+                        raw_spin_unlock_irqrestore(&busiest->lock, flags);
                         if (active_balance)
                                 wake_up_process(busiest->migration_thread);
 
@@ -4289,7 +4279,7 @@ load_balance_newidle(int this_cpu, struct rq *this_rq, struct sched_domain *sd)
         int all_pinned = 0;
         struct cpumask *cpus = __get_cpu_var(load_balance_tmpmask);
 
-        cpumask_setall(cpus);
+        cpumask_copy(cpus, cpu_active_mask);
 
         /*
          * When power savings policy is enabled for the parent domain, idle
@@ -4398,10 +4388,10 @@ redo:
                 /*
                  * Should not call ttwu while holding a rq->lock
                  */
-                spin_unlock(&this_rq->lock);
+                raw_spin_unlock(&this_rq->lock);
                 if (active_balance)
                         wake_up_process(busiest->migration_thread);
-                spin_lock(&this_rq->lock);
+                raw_spin_lock(&this_rq->lock);
 
         } else
                 sd->nr_balance_failed = 0;
@@ -4429,6 +4419,11 @@ static void idle_balance(int this_cpu, struct rq *this_rq)
         int pulled_task = 0;
         unsigned long next_balance = jiffies + HZ;
 
+        this_rq->idle_stamp = this_rq->clock;
+
+        if (this_rq->avg_idle < sysctl_sched_migration_cost)
+                return;
+
         for_each_domain(this_cpu, sd) {
                 unsigned long interval;
 
@@ -4443,8 +4438,10 @@ static void idle_balance(int this_cpu, struct rq *this_rq)
                 interval = msecs_to_jiffies(sd->balance_interval);
                 if (time_after(next_balance, sd->last_balance + interval))
                         next_balance = sd->last_balance + interval;
-                if (pulled_task)
+                if (pulled_task) {
+                        this_rq->idle_stamp = 0;
                         break;
+                }
         }
         if (pulled_task || time_after(jiffies, this_rq->next_balance)) {
                 /*
@@ -4679,7 +4676,7 @@ int select_nohz_load_balancer(int stop_tick)
                 cpumask_set_cpu(cpu, nohz.cpu_mask);
 
                 /* time for ilb owner also to sleep */
-                if (cpumask_weight(nohz.cpu_mask) == num_online_cpus()) {
+                if (cpumask_weight(nohz.cpu_mask) == num_active_cpus()) {
                         if (atomic_read(&nohz.load_balancer) == cpu)
                                 atomic_set(&nohz.load_balancer, -1);
                         return 0;
@@ -5046,8 +5043,13 @@ static void account_guest_time(struct task_struct *p, cputime_t cputime,
         p->gtime = cputime_add(p->gtime, cputime);
 
         /* Add guest time to cpustat. */
-        cpustat->user = cputime64_add(cpustat->user, tmp);
-        cpustat->guest = cputime64_add(cpustat->guest, tmp);
+        if (TASK_NICE(p) > 0) {
+                cpustat->nice = cputime64_add(cpustat->nice, tmp);
+                cpustat->guest_nice = cputime64_add(cpustat->guest_nice, tmp);
+        } else {
+                cpustat->user = cputime64_add(cpustat->user, tmp);
+                cpustat->guest = cputime64_add(cpustat->guest, tmp);
+        }
 }
 
 /*
@@ -5162,60 +5164,86 @@ void account_idle_ticks(unsigned long ticks)
  * Use precise platform statistics if available:
  */
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
-cputime_t task_utime(struct task_struct *p)
+void task_times(struct task_struct *p, cputime_t *ut, cputime_t *st)
 {
-        return p->utime;
+        *ut = p->utime;
+        *st = p->stime;
 }
 
-cputime_t task_stime(struct task_struct *p)
+void thread_group_times(struct task_struct *p, cputime_t *ut, cputime_t *st)
 {
-        return p->stime;
+        struct task_cputime cputime;
+
+        thread_group_cputime(p, &cputime);
+
+        *ut = cputime.utime;
+        *st = cputime.stime;
 }
 #else
-cputime_t task_utime(struct task_struct *p)
+
+#ifndef nsecs_to_cputime
+# define nsecs_to_cputime(__nsecs)      nsecs_to_jiffies(__nsecs)
+#endif
+
+void task_times(struct task_struct *p, cputime_t *ut, cputime_t *st)
 {
-        clock_t utime = cputime_to_clock_t(p->utime),
-                total = utime + cputime_to_clock_t(p->stime);
-        u64 temp;
+        cputime_t rtime, utime = p->utime, total = cputime_add(utime, p->stime);
 
         /*
          * Use CFS's precise accounting:
          */
-        temp = (u64)nsec_to_clock_t(p->se.sum_exec_runtime);
+        rtime = nsecs_to_cputime(p->se.sum_exec_runtime);
 
         if (total) {
-                temp *= utime;
+                u64 temp;
+
+                temp = (u64)(rtime * utime);
                 do_div(temp, total);
-        }
-        utime = (clock_t)temp;
+                utime = (cputime_t)temp;
+        } else
+                utime = rtime;
 
-        p->prev_utime = max(p->prev_utime, clock_t_to_cputime(utime));
-        return p->prev_utime;
+        /*
+         * Compare with previous values, to keep monotonicity:
+         */
+        p->prev_utime = max(p->prev_utime, utime);
+        p->prev_stime = max(p->prev_stime, cputime_sub(rtime, p->prev_utime));
+
+        *ut = p->prev_utime;
+        *st = p->prev_stime;
 }
 
-cputime_t task_stime(struct task_struct *p)
+/*
+ * Must be called with siglock held.
+ */
+void thread_group_times(struct task_struct *p, cputime_t *ut, cputime_t *st)
 {
-        clock_t stime;
+        struct signal_struct *sig = p->signal;
+        struct task_cputime cputime;
+        cputime_t rtime, utime, total;
 
-        /*
-         * Use CFS's precise accounting. (we subtract utime from
-         * the total, to make sure the total observed by userspace
-         * grows monotonically - apps rely on that):
-         */
-        stime = nsec_to_clock_t(p->se.sum_exec_runtime) -
-                        cputime_to_clock_t(task_utime(p));
+        thread_group_cputime(p, &cputime);
 
-        if (stime >= 0)
-                p->prev_stime = max(p->prev_stime, clock_t_to_cputime(stime));
+        total = cputime_add(cputime.utime, cputime.stime);
+        rtime = nsecs_to_cputime(cputime.sum_exec_runtime);
 
-        return p->prev_stime;
-}
-#endif
+        if (total) {
+                u64 temp;
 
-inline cputime_t task_gtime(struct task_struct *p)
-{
-        return p->gtime;
+                temp = (u64)(rtime * cputime.utime);
+                do_div(temp, total);
+                utime = (cputime_t)temp;
+        } else
+                utime = rtime;
+
+        sig->prev_utime = max(sig->prev_utime, utime);
+        sig->prev_stime = max(sig->prev_stime,
+                              cputime_sub(rtime, sig->prev_utime));
+
+        *ut = sig->prev_utime;
+        *st = sig->prev_stime;
 }
+#endif
 
 /*
  * This function gets called by the timer code, with HZ frequency.
@@ -5232,11 +5260,11 @@ void scheduler_tick(void)
 
         sched_clock_tick();
 
-        spin_lock(&rq->lock);
+        raw_spin_lock(&rq->lock);
         update_rq_clock(rq);
         update_cpu_load(rq);
         curr->sched_class->task_tick(rq, curr, 0);
-        spin_unlock(&rq->lock);
+        raw_spin_unlock(&rq->lock);
 
         perf_event_task_tick(curr, cpu);
 
@@ -5350,13 +5378,14 @@ static inline void schedule_debug(struct task_struct *prev)
 #endif
 }
 
-static void put_prev_task(struct rq *rq, struct task_struct *p)
+static void put_prev_task(struct rq *rq, struct task_struct *prev)
 {
-        u64 runtime = p->se.sum_exec_runtime - p->se.prev_sum_exec_runtime;
+        if (prev->state == TASK_RUNNING) {
+                u64 runtime = prev->se.sum_exec_runtime;
 
-        update_avg(&p->se.avg_running, runtime);
+                runtime -= prev->se.prev_sum_exec_runtime;
+                runtime = min_t(u64, runtime, 2*sysctl_sched_migration_cost);
 
-        if (p->state == TASK_RUNNING) {
                 /*
                  * In order to avoid avg_overlap growing stale when we are
                  * indeed overlapping and hence not getting put to sleep, grow
@@ -5366,12 +5395,9 @@ static void put_prev_task(struct rq *rq, struct task_struct *p)
                  * correlates to the amount of cache footprint a task can
                  * build up.
                  */
-                runtime = min_t(u64, runtime, 2*sysctl_sched_migration_cost);
-                update_avg(&p->se.avg_overlap, runtime);
-        } else {
-                update_avg(&p->se.avg_running, 0);
+                update_avg(&prev->se.avg_overlap, runtime);
         }
-        p->sched_class->put_prev_task(rq, p);
+        prev->sched_class->put_prev_task(rq, prev);
 }
 
 /*
@@ -5432,7 +5458,7 @@ need_resched_nonpreemptible:
         if (sched_feat(HRTICK))
                 hrtick_clear(rq);
 
-        spin_lock_irq(&rq->lock);
+        raw_spin_lock_irq(&rq->lock);
         update_rq_clock(rq);
         clear_tsk_need_resched(prev);
 
@@ -5468,7 +5494,7 @@ need_resched_nonpreemptible:
                 cpu = smp_processor_id();
                 rq = cpu_rq(cpu);
         } else
-                spin_unlock_irq(&rq->lock);
+                raw_spin_unlock_irq(&rq->lock);
 
         post_schedule(rq);
 
@@ -5481,7 +5507,7 @@ need_resched_nonpreemptible:
 }
 EXPORT_SYMBOL(schedule);
 
-#ifdef CONFIG_SMP
+#ifdef CONFIG_MUTEX_SPIN_ON_OWNER
 /*
  * Look out! "owner" is an entirely speculative pointer
  * access and not reliable.
@@ -6175,22 +6201,14 @@ __setscheduler(struct rq *rq, struct task_struct *p, int policy, int prio)
         BUG_ON(p->se.on_rq);
 
         p->policy = policy;
-        switch (p->policy) {
-        case SCHED_NORMAL:
-        case SCHED_BATCH:
-        case SCHED_IDLE:
-                p->sched_class = &fair_sched_class;
-                break;
-        case SCHED_FIFO:
-        case SCHED_RR:
-                p->sched_class = &rt_sched_class;
-                break;
-        }
-
         p->rt_priority = prio;
         p->normal_prio = normal_prio(p);
         /* we are holding p->pi_lock already */
         p->prio = rt_mutex_getprio(p);
+        if (rt_prio(p->prio))
+                p->sched_class = &rt_sched_class;
+        else
+                p->sched_class = &fair_sched_class;
         set_load_weight(p);
 }
 
@@ -6305,7 +6323,7 @@ recheck:
          * make sure no PI-waiters arrive (or leave) while we are
          * changing the priority of the task:
          */
-        spin_lock_irqsave(&p->pi_lock, flags);
+        raw_spin_lock_irqsave(&p->pi_lock, flags);
         /*
          * To be able to change p->policy safely, the apropriate
          * runqueue lock must be held.
@@ -6315,7 +6333,7 @@ recheck:
         if (unlikely(oldpolicy != -1 && oldpolicy != p->policy)) {
                 policy = oldpolicy = -1;
                 __task_rq_unlock(rq);
-                spin_unlock_irqrestore(&p->pi_lock, flags);
+                raw_spin_unlock_irqrestore(&p->pi_lock, flags);
                 goto recheck;
         }
         update_rq_clock(rq);
@@ -6339,7 +6357,7 @@ recheck:
                 check_class_changed(rq, p, prev_class, oldprio, running);
         }
         __task_rq_unlock(rq);
-        spin_unlock_irqrestore(&p->pi_lock, flags);
+        raw_spin_unlock_irqrestore(&p->pi_lock, flags);
 
         rt_mutex_adjust_pi(p);
 
@@ -6593,6 +6611,8 @@ SYSCALL_DEFINE3(sched_setaffinity, pid_t, pid, unsigned int, len,
 long sched_getaffinity(pid_t pid, struct cpumask *mask)
 {
         struct task_struct *p;
+        unsigned long flags;
+        struct rq *rq;
         int retval;
 
         get_online_cpus();
@@ -6607,7 +6627,9 @@ long sched_getaffinity(pid_t pid, struct cpumask *mask)
         if (retval)
                 goto out_unlock;
 
+        rq = task_rq_lock(p, &flags);
         cpumask_and(mask, &p->cpus_allowed, cpu_online_mask);
+        task_rq_unlock(rq, &flags);
 
 out_unlock:
         read_unlock(&tasklist_lock);
@@ -6665,7 +6687,7 @@ SYSCALL_DEFINE0(sched_yield)
          */
         __release(rq->lock);
         spin_release(&rq->lock.dep_map, 1, _THIS_IP_);
-        _raw_spin_unlock(&rq->lock);
+        do_raw_spin_unlock(&rq->lock);
         preempt_enable_no_resched();
 
         schedule();
@@ -6845,6 +6867,8 @@ SYSCALL_DEFINE2(sched_rr_get_interval, pid_t, pid,
 {
         struct task_struct *p;
         unsigned int time_slice;
+        unsigned long flags;
+        struct rq *rq;
         int retval;
         struct timespec t;
 
@@ -6861,7 +6885,9 @@ SYSCALL_DEFINE2(sched_rr_get_interval, pid_t, pid,
         if (retval)
                 goto out_unlock;
 
-        time_slice = p->sched_class->get_rr_interval(p);
+        rq = task_rq_lock(p, &flags);
+        time_slice = p->sched_class->get_rr_interval(rq, p);
+        task_rq_unlock(rq, &flags);
 
         read_unlock(&tasklist_lock);
         jiffies_to_timespec(time_slice, &t);
@@ -6935,7 +6961,7 @@ void show_state_filter(unsigned long state_filter)
         /*
          * Only show locks if all tasks are dumped:
          */
-        if (state_filter == -1)
+        if (!state_filter)
                 debug_show_all_locks();
 }
 
@@ -6957,12 +6983,11 @@ void __cpuinit init_idle(struct task_struct *idle, int cpu)
         struct rq *rq = cpu_rq(cpu);
         unsigned long flags;
 
-        spin_lock_irqsave(&rq->lock, flags);
+        raw_spin_lock_irqsave(&rq->lock, flags);
 
         __sched_fork(idle);
         idle->se.exec_start = sched_clock();
 
-        idle->prio = idle->normal_prio = MAX_PRIO;
         cpumask_copy(&idle->cpus_allowed, cpumask_of(cpu));
         __set_task_cpu(idle, cpu);
 
@@ -6970,7 +6995,7 @@ void __cpuinit init_idle(struct task_struct *idle, int cpu)
 #if defined(CONFIG_SMP) && defined(__ARCH_WANT_UNLOCKED_CTXSW)
         idle->oncpu = 1;
 #endif
-        spin_unlock_irqrestore(&rq->lock, flags);
+        raw_spin_unlock_irqrestore(&rq->lock, flags);
 
         /* Set the preempt count _outside_ the spinlocks! */
 #if defined(CONFIG_PREEMPT)
@@ -7003,22 +7028,43 @@ cpumask_var_t nohz_cpu_mask;
  *
  * This idea comes from the SD scheduler of Con Kolivas:
  */
-static inline void sched_init_granularity(void)
+static int get_update_sysctl_factor(void)
 {
-        unsigned int factor = 1 + ilog2(num_online_cpus());
-        const unsigned long limit = 200000000;
+        unsigned int cpus = min_t(int, num_online_cpus(), 8);
+        unsigned int factor;
 
-        sysctl_sched_min_granularity *= factor;
-        if (sysctl_sched_min_granularity > limit)
-                sysctl_sched_min_granularity = limit;
+        switch (sysctl_sched_tunable_scaling) {
+        case SCHED_TUNABLESCALING_NONE:
+                factor = 1;
+                break;
+        case SCHED_TUNABLESCALING_LINEAR:
+                factor = cpus;
+                break;
+        case SCHED_TUNABLESCALING_LOG:
+        default:
+                factor = 1 + ilog2(cpus);
+                break;
+        }
 
-        sysctl_sched_latency *= factor;
-        if (sysctl_sched_latency > limit)
-                sysctl_sched_latency = limit;
+        return factor;
+}
 
-        sysctl_sched_wakeup_granularity *= factor;
+static void update_sysctl(void)
+{
+        unsigned int factor = get_update_sysctl_factor();
+
+#define SET_SYSCTL(name) \
+        (sysctl_##name = (factor) * normalized_sysctl_##name)
+        SET_SYSCTL(sched_min_granularity);
+        SET_SYSCTL(sched_latency);
+        SET_SYSCTL(sched_wakeup_granularity);
+        SET_SYSCTL(sched_shares_ratelimit);
+#undef SET_SYSCTL
+}
 
-        sysctl_sched_shares_ratelimit *= factor;
+static inline void sched_init_granularity(void)
+{
+        update_sysctl();
 }
 
 #ifdef CONFIG_SMP
@@ -7055,7 +7101,7 @@ int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask)
         int ret = 0;
 
         rq = task_rq_lock(p, &flags);
-        if (!cpumask_intersects(new_mask, cpu_online_mask)) {
+        if (!cpumask_intersects(new_mask, cpu_active_mask)) {
                 ret = -EINVAL;
                 goto out;
         }
@@ -7077,7 +7123,7 @@ int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask)
         if (cpumask_test_cpu(task_cpu(p), new_mask))
                 goto out;
 
-        if (migrate_task(p, cpumask_any_and(cpu_online_mask, new_mask), &req)) {
+        if (migrate_task(p, cpumask_any_and(cpu_active_mask, new_mask), &req)) {
                 /* Need help from migration thread: drop lock and wait. */
                 struct task_struct *mt = rq->migration_thread;
 
@@ -7166,10 +7212,10 @@ static int migration_thread(void *data)
                 struct migration_req *req;
                 struct list_head *head;
 
-                spin_lock_irq(&rq->lock);
+                raw_spin_lock_irq(&rq->lock);
 
                 if (cpu_is_offline(cpu)) {
-                        spin_unlock_irq(&rq->lock);
+                        raw_spin_unlock_irq(&rq->lock);
                         break;
                 }
 
@@ -7181,7 +7227,7 @@ static int migration_thread(void *data)
                 head = &rq->migration_queue;
 
                 if (list_empty(head)) {
-                        spin_unlock_irq(&rq->lock);
+                        raw_spin_unlock_irq(&rq->lock);
                         schedule();
                         set_current_state(TASK_INTERRUPTIBLE);
                         continue;
@@ -7190,14 +7236,14 @@ static int migration_thread(void *data)
                 list_del_init(head->next);
 
                 if (req->task != NULL) {
-                        spin_unlock(&rq->lock);
+                        raw_spin_unlock(&rq->lock);
                         __migrate_task(req->task, cpu, req->dest_cpu);
                 } else if (likely(cpu == (badcpu = smp_processor_id()))) {
                         req->dest_cpu = RCU_MIGRATION_GOT_QS;
-                        spin_unlock(&rq->lock);
+                        raw_spin_unlock(&rq->lock);
                 } else {
                         req->dest_cpu = RCU_MIGRATION_MUST_SYNC;
-                        spin_unlock(&rq->lock);
+                        raw_spin_unlock(&rq->lock);
                         WARN_ONCE(1, "migration_thread() on CPU %d, expected %d\n", badcpu, cpu);
                 }
                 local_irq_enable();
@@ -7231,19 +7277,19 @@ static void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
 
 again:
         /* Look for allowed, online CPU in same node. */
-        for_each_cpu_and(dest_cpu, nodemask, cpu_online_mask)
+        for_each_cpu_and(dest_cpu, nodemask, cpu_active_mask)
                 if (cpumask_test_cpu(dest_cpu, &p->cpus_allowed))
                         goto move;
 
         /* Any allowed, online CPU? */
-        dest_cpu = cpumask_any_and(&p->cpus_allowed, cpu_online_mask);
+        dest_cpu = cpumask_any_and(&p->cpus_allowed, cpu_active_mask);
         if (dest_cpu < nr_cpu_ids)
                 goto move;
 
         /* No more Mr. Nice Guy. */
         if (dest_cpu >= nr_cpu_ids) {
                 cpuset_cpus_allowed_locked(p, &p->cpus_allowed);
-                dest_cpu = cpumask_any_and(cpu_online_mask, &p->cpus_allowed);
+                dest_cpu = cpumask_any_and(cpu_active_mask, &p->cpus_allowed);
 
                 /*
                  * Don't tell them about moving exiting tasks or
@@ -7272,7 +7318,7 @@ move:
  */
 static void migrate_nr_uninterruptible(struct rq *rq_src)
 {
-        struct rq *rq_dest = cpu_rq(cpumask_any(cpu_online_mask));
+        struct rq *rq_dest = cpu_rq(cpumask_any(cpu_active_mask));
         unsigned long flags;
 
         local_irq_save(flags);
@@ -7320,14 +7366,14 @@ void sched_idle_next(void)
          * Strictly not necessary since rest of the CPUs are stopped by now
          * and interrupts disabled on the current cpu.
          */
-        spin_lock_irqsave(&rq->lock, flags);
+        raw_spin_lock_irqsave(&rq->lock, flags);
 
         __setscheduler(rq, p, SCHED_FIFO, MAX_RT_PRIO-1);
 
         update_rq_clock(rq);
         activate_task(rq, p, 0);
 
-        spin_unlock_irqrestore(&rq->lock, flags);
+        raw_spin_unlock_irqrestore(&rq->lock, flags);
 }
 
 /*
@@ -7363,9 +7409,9 @@ static void migrate_dead(unsigned int dead_cpu, struct task_struct *p)
          * that's OK. No task can be added to this CPU, so iteration is
          * fine.
          */
-        spin_unlock_irq(&rq->lock);
+        raw_spin_unlock_irq(&rq->lock);
         move_task_off_dead_cpu(dead_cpu, p);
-        spin_lock_irq(&rq->lock);
+        raw_spin_lock_irq(&rq->lock);
 
         put_task_struct(p);
 }
@@ -7406,17 +7452,16 @@ static struct ctl_table sd_ctl_dir[] = {
                 .procname       = "sched_domain",
                 .mode           = 0555,
         },
-        {0, },
+        {}
 };
 
 static struct ctl_table sd_ctl_root[] = {
         {
-                .ctl_name       = CTL_KERN,
                 .procname       = "kernel",
                 .mode           = 0555,
                 .child          = sd_ctl_dir,
         },
-        {0, },
+        {}
 };
 
 static struct ctl_table *sd_alloc_ctl_entry(int n)
@@ -7526,7 +7571,7 @@ static ctl_table *sd_alloc_ctl_cpu_table(int cpu)
 static struct ctl_table_header *sd_sysctl_header;
 static void register_sched_domain_sysctl(void)
 {
-        int i, cpu_num = num_online_cpus();
+        int i, cpu_num = num_possible_cpus();
         struct ctl_table *entry = sd_alloc_ctl_entry(cpu_num + 1);
         char buf[32];
 
@@ -7536,7 +7581,7 @@ static void register_sched_domain_sysctl(void)
         if (entry == NULL)
                 return;
 
-        for_each_online_cpu(i) {
+        for_each_possible_cpu(i) {
                 snprintf(buf, 32, "cpu%d", i);
                 entry->procname = kstrdup(buf, GFP_KERNEL);
                 entry->mode = 0555;
@@ -7632,13 +7677,13 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
 
                 /* Update our root-domain */
                 rq = cpu_rq(cpu);
-                spin_lock_irqsave(&rq->lock, flags);
+                raw_spin_lock_irqsave(&rq->lock, flags);
                 if (rq->rd) {
                         BUG_ON(!cpumask_test_cpu(cpu, rq->rd->span));
 
                         set_rq_online(rq);
                 }
-                spin_unlock_irqrestore(&rq->lock, flags);
+                raw_spin_unlock_irqrestore(&rq->lock, flags);
                 break;
 
 #ifdef CONFIG_HOTPLUG_CPU
@@ -7663,14 +7708,13 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
                 put_task_struct(rq->migration_thread);
                 rq->migration_thread = NULL;
                 /* Idle task back to normal (off runqueue, low prio) */
-                spin_lock_irq(&rq->lock);
+                raw_spin_lock_irq(&rq->lock);
                 update_rq_clock(rq);
                 deactivate_task(rq, rq->idle, 0);
-                rq->idle->static_prio = MAX_PRIO;
                 __setscheduler(rq, rq->idle, SCHED_NORMAL, 0);
                 rq->idle->sched_class = &idle_sched_class;
                 migrate_dead_tasks(cpu);
-                spin_unlock_irq(&rq->lock);
+                raw_spin_unlock_irq(&rq->lock);
                 cpuset_unlock();
                 migrate_nr_uninterruptible(rq);
                 BUG_ON(rq->nr_running != 0);
@@ -7680,30 +7724,30 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
                  * they didn't take sched_hotcpu_mutex. Just wake up
                  * the requestors.
                  */
-                spin_lock_irq(&rq->lock);
+                raw_spin_lock_irq(&rq->lock);
                 while (!list_empty(&rq->migration_queue)) {
                         struct migration_req *req;
 
                         req = list_entry(rq->migration_queue.next,
                                          struct migration_req, list);
                         list_del_init(&req->list);
-                        spin_unlock_irq(&rq->lock);
+                        raw_spin_unlock_irq(&rq->lock);
                         complete(&req->done);
-                        spin_lock_irq(&rq->lock);
+                        raw_spin_lock_irq(&rq->lock);
                 }
-                spin_unlock_irq(&rq->lock);
+                raw_spin_unlock_irq(&rq->lock);
                 break;
 
         case CPU_DYING:
         case CPU_DYING_FROZEN:
                 /* Update our root-domain */
                 rq = cpu_rq(cpu);
-                spin_lock_irqsave(&rq->lock, flags);
+                raw_spin_lock_irqsave(&rq->lock, flags);
                 if (rq->rd) {
                         BUG_ON(!cpumask_test_cpu(cpu, rq->rd->span));
                         set_rq_offline(rq);
                 }
-                spin_unlock_irqrestore(&rq->lock, flags);
+                raw_spin_unlock_irqrestore(&rq->lock, flags);
                 break;
 #endif
         }
@@ -7740,6 +7784,16 @@ early_initcall(migration_init);
 
 #ifdef CONFIG_SCHED_DEBUG
 
+static __read_mostly int sched_domain_debug_enabled;
+
+static int __init sched_domain_debug_setup(char *str)
+{
+        sched_domain_debug_enabled = 1;
+
+        return 0;
+}
+early_param("sched_debug", sched_domain_debug_setup);
+
 static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level,
                                   struct cpumask *groupmask)
 {
@@ -7826,6 +7880,9 @@ static void sched_domain_debug(struct sched_domain *sd, int cpu)
         cpumask_var_t groupmask;
         int level = 0;
 
+        if (!sched_domain_debug_enabled)
+                return;
+
         if (!sd) {
                 printk(KERN_DEBUG "CPU%d attaching NULL sched-domain.\n", cpu);
                 return;
@@ -7905,6 +7962,8 @@ sd_parent_degenerate(struct sched_domain *sd, struct sched_domain *parent)
 
 static void free_rootdomain(struct root_domain *rd)
 {
+        synchronize_sched();
+
         cpupri_cleanup(&rd->cpupri);
 
         free_cpumask_var(rd->rto_mask);
@@ -7918,7 +7977,7 @@ static void rq_attach_root(struct rq *rq, struct root_domain *rd)
         struct root_domain *old_rd = NULL;
         unsigned long flags;
 
-        spin_lock_irqsave(&rq->lock, flags);
+        raw_spin_lock_irqsave(&rq->lock, flags);
 
         if (rq->rd) {
                 old_rd = rq->rd;
@@ -7944,7 +8003,7 @@ static void rq_attach_root(struct rq *rq, struct root_domain *rd)
         if (cpumask_test_cpu(rq->cpu, cpu_active_mask))
                 set_rq_online(rq);
 
-        spin_unlock_irqrestore(&rq->lock, flags);
+        raw_spin_unlock_irqrestore(&rq->lock, flags);
 
         if (old_rd)
                 free_rootdomain(old_rd);
@@ -8045,6 +8104,7 @@ static cpumask_var_t cpu_isolated_map;
 /* Setup the mask of cpus configured for isolated domains */
 static int __init isolated_cpu_setup(char *str)
 {
+        alloc_bootmem_cpumask_var(&cpu_isolated_map);
         cpulist_parse(str, cpu_isolated_map);
         return 1;
 }
@@ -8229,14 +8289,14 @@ enum s_alloc {
  */
 #ifdef CONFIG_SCHED_SMT
 static DEFINE_PER_CPU(struct static_sched_domain, cpu_domains);
-static DEFINE_PER_CPU(struct static_sched_group, sched_group_cpus);
+static DEFINE_PER_CPU(struct static_sched_group, sched_groups);
 
 static int
 cpu_to_cpu_group(int cpu, const struct cpumask *cpu_map,
                  struct sched_group **sg, struct cpumask *unused)
 {
         if (sg)
-                *sg = &per_cpu(sched_group_cpus, cpu).sg;
+                *sg = &per_cpu(sched_groups, cpu).sg;
         return cpu;
 }
 #endif /* CONFIG_SCHED_SMT */
@@ -8881,7 +8941,7 @@ static int build_sched_domains(const struct cpumask *cpu_map)
         return __build_sched_domains(cpu_map, NULL);
 }
 
-static struct cpumask *doms_cur;        /* current sched domains */
+static cpumask_var_t *doms_cur; /* current sched domains */
 static int ndoms_cur;           /* number of sched domains in 'doms_cur' */
 static struct sched_domain_attr *dattr_cur;
                                 /* attribues of custom domains in 'doms_cur' */
@@ -8903,6 +8963,31 @@ int __attribute__((weak)) arch_update_cpu_topology(void)
         return 0;
 }
 
+cpumask_var_t *alloc_sched_domains(unsigned int ndoms)
+{
+        int i;
+        cpumask_var_t *doms;
+
+        doms = kmalloc(sizeof(*doms) * ndoms, GFP_KERNEL);
+        if (!doms)
+                return NULL;
+        for (i = 0; i < ndoms; i++) {
+                if (!alloc_cpumask_var(&doms[i], GFP_KERNEL)) {
+                        free_sched_domains(doms, i);
+                        return NULL;
+                }
+        }
+        return doms;
+}
+
+void free_sched_domains(cpumask_var_t doms[], unsigned int ndoms)
+{
+        unsigned int i;
+        for (i = 0; i < ndoms; i++)
+                free_cpumask_var(doms[i]);
+        kfree(doms);
+}
+
 /*
  * Set up scheduler domains and groups. Callers must hold the hotplug lock.
  * For now this just excludes isolated cpus, but could be used to
@@ -8914,12 +8999,12 @@ static int arch_init_sched_domains(const struct cpumask *cpu_map)
 
         arch_update_cpu_topology();
         ndoms_cur = 1;
-        doms_cur = kmalloc(cpumask_size(), GFP_KERNEL);
+        doms_cur = alloc_sched_domains(ndoms_cur);
         if (!doms_cur)
-                doms_cur = fallback_doms;
-        cpumask_andnot(doms_cur, cpu_map, cpu_isolated_map);
+                doms_cur = &fallback_doms;
+        cpumask_andnot(doms_cur[0], cpu_map, cpu_isolated_map);
         dattr_cur = NULL;
-        err = build_sched_domains(doms_cur);
+        err = build_sched_domains(doms_cur[0]);
         register_sched_domain_sysctl();
 
         return err;
@@ -8969,19 +9054,19 @@ static int dattrs_equal(struct sched_domain_attr *cur, int idx_cur,
  * doms_new[] to the current sched domain partitioning, doms_cur[].
  * It destroys each deleted domain and builds each new domain.
  *
- * 'doms_new' is an array of cpumask's of length 'ndoms_new'.
+ * 'doms_new' is an array of cpumask_var_t's of length 'ndoms_new'.
  * The masks don't intersect (don't overlap.) We should setup one
  * sched domain for each mask. CPUs not in any of the cpumasks will
  * not be load balanced. If the same cpumask appears both in the
  * current 'doms_cur' domains and in the new 'doms_new', we can leave
  * it as it is.
  *
- * The passed in 'doms_new' should be kmalloc'd. This routine takes
- * ownership of it and will kfree it when done with it. If the caller
- * failed the kmalloc call, then it can pass in doms_new == NULL &&
- * ndoms_new == 1, and partition_sched_domains() will fallback to
- * the single partition 'fallback_doms', it also forces the domains
- * to be rebuilt.
+ * The passed in 'doms_new' should be allocated using
+ * alloc_sched_domains.  This routine takes ownership of it and will
+ * free_sched_domains it when done with it. If the caller failed the
+ * alloc call, then it can pass in doms_new == NULL && ndoms_new == 1,
+ * and partition_sched_domains() will fallback to the single partition
+ * 'fallback_doms', it also forces the domains to be rebuilt.
  *
  * If doms_new == NULL it will be replaced with cpu_online_mask.
  * ndoms_new == 0 is a special case for destroying existing domains,
@@ -8989,8 +9074,7 @@ static int dattrs_equal(struct sched_domain_attr *cur, int idx_cur,
  *
  * Call with hotplug lock held
  */
-/* FIXME: Change to struct cpumask *doms_new[] */
-void partition_sched_domains(int ndoms_new, struct cpumask *doms_new,
+void partition_sched_domains(int ndoms_new, cpumask_var_t doms_new[],
                              struct sched_domain_attr *dattr_new)
 {
         int i, j, n;
@@ -9009,40 +9093,40 @@ void partition_sched_domains(int ndoms_new, struct cpumask *doms_new,
         /* Destroy deleted domains */
         for (i = 0; i < ndoms_cur; i++) {
                 for (j = 0; j < n && !new_topology; j++) {
-                        if (cpumask_equal(&doms_cur[i], &doms_new[j])
+                        if (cpumask_equal(doms_cur[i], doms_new[j])
                             && dattrs_equal(dattr_cur, i, dattr_new, j))
                                 goto match1;
                 }
                 /* no match - a current sched domain not in new doms_new[] */
-                detach_destroy_domains(doms_cur + i);
+                detach_destroy_domains(doms_cur[i]);
 match1:
                 ;
         }
 
         if (doms_new == NULL) {
                 ndoms_cur = 0;
-                doms_new = fallback_doms;
-                cpumask_andnot(&doms_new[0], cpu_online_mask, cpu_isolated_map);
+                doms_new = &fallback_doms;
+                cpumask_andnot(doms_new[0], cpu_active_mask, cpu_isolated_map);
                 WARN_ON_ONCE(dattr_new);
         }
 
         /* Build new domains */
         for (i = 0; i < ndoms_new; i++) {
                 for (j = 0; j < ndoms_cur && !new_topology; j++) {
-                        if (cpumask_equal(&doms_new[i], &doms_cur[j])
+                        if (cpumask_equal(doms_new[i], doms_cur[j])
                             && dattrs_equal(dattr_new, i, dattr_cur, j))
                                 goto match2;
                 }
                 /* no match - add a new doms_new */
-                __build_sched_domains(doms_new + i,
+                __build_sched_domains(doms_new[i],
                                         dattr_new ? dattr_new + i : NULL);
 match2:
                 ;
         }
 
         /* Remember the new sched domains */
-        if (doms_cur != fallback_doms)
-                kfree(doms_cur);
+        if (doms_cur != &fallback_doms)
+                free_sched_domains(doms_cur, ndoms_cur);
         kfree(dattr_cur);       /* kfree(NULL) is safe */
         doms_cur = doms_new;
         dattr_cur = dattr_new;
@@ -9153,8 +9237,10 @@ static int update_sched_domains(struct notifier_block *nfb,
         switch (action) {
         case CPU_ONLINE:
         case CPU_ONLINE_FROZEN:
-        case CPU_DEAD:
-        case CPU_DEAD_FROZEN:
+        case CPU_DOWN_PREPARE:
+        case CPU_DOWN_PREPARE_FROZEN:
+        case CPU_DOWN_FAILED:
+        case CPU_DOWN_FAILED_FROZEN:
                 partition_sched_domains(1, NULL, NULL);
                 return NOTIFY_OK;
 
@@ -9201,7 +9287,7 @@ void __init sched_init_smp(void)
 #endif
         get_online_cpus();
         mutex_lock(&sched_domains_mutex);
-        arch_init_sched_domains(cpu_online_mask);
+        arch_init_sched_domains(cpu_active_mask);
         cpumask_andnot(non_isolated_cpus, cpu_possible_mask, cpu_isolated_map);
         if (cpumask_empty(non_isolated_cpus))
                 cpumask_set_cpu(smp_processor_id(), non_isolated_cpus);
@@ -9274,13 +9360,13 @@ static void init_rt_rq(struct rt_rq *rt_rq, struct rq *rq)
 #ifdef CONFIG_SMP
         rt_rq->rt_nr_migratory = 0;
         rt_rq->overloaded = 0;
-        plist_head_init(&rt_rq->pushable_tasks, &rq->lock);
+        plist_head_init_raw(&rt_rq->pushable_tasks, &rq->lock);
 #endif
 
         rt_rq->rt_time = 0;
         rt_rq->rt_throttled = 0;
         rt_rq->rt_runtime = 0;
-        spin_lock_init(&rt_rq->rt_runtime_lock);
+        raw_spin_lock_init(&rt_rq->rt_runtime_lock);
 
 #ifdef CONFIG_RT_GROUP_SCHED
         rt_rq->rt_nr_boosted = 0;
@@ -9364,10 +9450,6 @@ void __init sched_init(void)
 #ifdef CONFIG_CPUMASK_OFFSTACK
         alloc_size += num_possible_cpus() * cpumask_size();
 #endif
-        /*
-         * As sched_init() is called before page_alloc is setup,
-         * we use alloc_bootmem().
-         */
         if (alloc_size) {
                 ptr = (unsigned long)kzalloc(alloc_size, GFP_NOWAIT);
 
@@ -9444,7 +9526,7 @@ void __init sched_init(void)
                 struct rq *rq;
 
                 rq = cpu_rq(i);
-                spin_lock_init(&rq->lock);
+                raw_spin_lock_init(&rq->lock);
                 rq->nr_running = 0;
                 rq->calc_load_active = 0;
                 rq->calc_load_update = jiffies + LOAD_FREQ;
@@ -9504,7 +9586,7 @@ void __init sched_init(void)
 #elif defined CONFIG_USER_SCHED
                 init_tg_rt_entry(&root_task_group, &rq->rt, NULL, i, 0, NULL);
                 init_tg_rt_entry(&init_task_group,
-                                &per_cpu(init_rt_rq, i),
+                                &per_cpu(init_rt_rq_var, i),
                                 &per_cpu(init_sched_rt_entity, i), i, 1,
                                 root_task_group.rt_se[i]);
 #endif
@@ -9522,6 +9604,8 @@ void __init sched_init(void)
                 rq->cpu = i;
                 rq->online = 0;
                 rq->migration_thread = NULL;
+                rq->idle_stamp = 0;
+                rq->avg_idle = 2*sysctl_sched_migration_cost;
                 INIT_LIST_HEAD(&rq->migration_queue);
                 rq_attach_root(rq, &def_root_domain);
 #endif
@@ -9540,7 +9624,7 @@ void __init sched_init(void)
 #endif
 
 #ifdef CONFIG_RT_MUTEXES
-        plist_head_init(&init_task.pi_waiters, &init_task.pi_lock);
+        plist_head_init_raw(&init_task.pi_waiters, &init_task.pi_lock);
 #endif
 
         /*
@@ -9571,7 +9655,9 @@ void __init sched_init(void)
         zalloc_cpumask_var(&nohz.cpu_mask, GFP_NOWAIT);
         alloc_cpumask_var(&nohz.ilb_grp_nohz_mask, GFP_NOWAIT);
 #endif
-        zalloc_cpumask_var(&cpu_isolated_map, GFP_NOWAIT);
+        /* May be allocated at isolcpus cmdline parse time */
+        if (cpu_isolated_map == NULL)
+                zalloc_cpumask_var(&cpu_isolated_map, GFP_NOWAIT);
 #endif /* SMP */
 
         perf_event_init();
@@ -9663,13 +9749,13 @@ void normalize_rt_tasks(void)
                         continue;
                 }
 
-                spin_lock(&p->pi_lock);
+                raw_spin_lock(&p->pi_lock);
                 rq = __task_rq_lock(p);
 
                 normalize_task(rq, p);
 
                 __task_rq_unlock(rq);
-                spin_unlock(&p->pi_lock);
+                raw_spin_unlock(&p->pi_lock);
         } while_each_thread(g, p);
 
         read_unlock_irqrestore(&tasklist_lock, flags);
@@ -9765,13 +9851,15 @@ int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent)
                 se = kzalloc_node(sizeof(struct sched_entity),
                                   GFP_KERNEL, cpu_to_node(i));
                 if (!se)
-                        goto err;
+                        goto err_free_rq;
 
                 init_tg_cfs_entry(tg, cfs_rq, se, i, 0, parent->se[i]);
         }
 
         return 1;
 
+ err_free_rq:
+        kfree(cfs_rq);
  err:
         return 0;
 }
@@ -9853,13 +9941,15 @@ int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent)
                 rt_se = kzalloc_node(sizeof(struct sched_rt_entity),
                                      GFP_KERNEL, cpu_to_node(i));
                 if (!rt_se)
-                        goto err;
+                        goto err_free_rq;
 
                 init_tg_rt_entry(tg, rt_rq, rt_se, i, 0, parent->rt_se[i]);
         }
 
         return 1;
 
+ err_free_rq:
+        kfree(rt_rq);
  err:
         return 0;
 }
@@ -10028,9 +10118,9 @@ static void set_se_shares(struct sched_entity *se, unsigned long shares)
         struct rq *rq = cfs_rq->rq;
         unsigned long flags;
 
-        spin_lock_irqsave(&rq->lock, flags);
+        raw_spin_lock_irqsave(&rq->lock, flags);
         __set_se_shares(se, shares);
-        spin_unlock_irqrestore(&rq->lock, flags);
+        raw_spin_unlock_irqrestore(&rq->lock, flags);
 }
 
 static DEFINE_MUTEX(shares_mutex);
@@ -10215,18 +10305,18 @@ static int tg_set_bandwidth(struct task_group *tg,
         if (err)
                 goto unlock;
 
-        spin_lock_irq(&tg->rt_bandwidth.rt_runtime_lock);
+        raw_spin_lock_irq(&tg->rt_bandwidth.rt_runtime_lock);
         tg->rt_bandwidth.rt_period = ns_to_ktime(rt_period);
         tg->rt_bandwidth.rt_runtime = rt_runtime;
 
         for_each_possible_cpu(i) {
                 struct rt_rq *rt_rq = tg->rt_rq[i];
 
-                spin_lock(&rt_rq->rt_runtime_lock);
+                raw_spin_lock(&rt_rq->rt_runtime_lock);
                 rt_rq->rt_runtime = rt_runtime;
-                spin_unlock(&rt_rq->rt_runtime_lock);
+                raw_spin_unlock(&rt_rq->rt_runtime_lock);
         }
-        spin_unlock_irq(&tg->rt_bandwidth.rt_runtime_lock);
+        raw_spin_unlock_irq(&tg->rt_bandwidth.rt_runtime_lock);
  unlock:
         read_unlock(&tasklist_lock);
         mutex_unlock(&rt_constraints_mutex);
@@ -10331,15 +10421,15 @@ static int sched_rt_global_constraints(void)
         if (sysctl_sched_rt_runtime == 0)
                 return -EBUSY;
 
-        spin_lock_irqsave(&def_rt_bandwidth.rt_runtime_lock, flags);
+        raw_spin_lock_irqsave(&def_rt_bandwidth.rt_runtime_lock, flags);
         for_each_possible_cpu(i) {
                 struct rt_rq *rt_rq = &cpu_rq(i)->rt;
 
-                spin_lock(&rt_rq->rt_runtime_lock);
+                raw_spin_lock(&rt_rq->rt_runtime_lock);
                 rt_rq->rt_runtime = global_rt_runtime();
-                spin_unlock(&rt_rq->rt_runtime_lock);
+                raw_spin_unlock(&rt_rq->rt_runtime_lock);
         }
-        spin_unlock_irqrestore(&def_rt_bandwidth.rt_runtime_lock, flags);
+        raw_spin_unlock_irqrestore(&def_rt_bandwidth.rt_runtime_lock, flags);
 
         return 0;
 }
@@ -10630,9 +10720,9 @@ static u64 cpuacct_cpuusage_read(struct cpuacct *ca, int cpu)
         /*
          * Take rq->lock to make 64-bit read safe on 32-bit platforms.
          */
-        spin_lock_irq(&cpu_rq(cpu)->lock);
+        raw_spin_lock_irq(&cpu_rq(cpu)->lock);
         data = *cpuusage;
-        spin_unlock_irq(&cpu_rq(cpu)->lock);
+        raw_spin_unlock_irq(&cpu_rq(cpu)->lock);
 #else
         data = *cpuusage;
 #endif
@@ -10648,9 +10738,9 @@ static void cpuacct_cpuusage_write(struct cpuacct *ca, int cpu, u64 val)
         /*
          * Take rq->lock to make 64-bit write safe on 32-bit platforms.
          */
-        spin_lock_irq(&cpu_rq(cpu)->lock);
+        raw_spin_lock_irq(&cpu_rq(cpu)->lock);
         *cpuusage = val;
-        spin_unlock_irq(&cpu_rq(cpu)->lock);
+        raw_spin_unlock_irq(&cpu_rq(cpu)->lock);
 #else
         *cpuusage = val;
 #endif
@@ -10884,9 +10974,9 @@ void synchronize_sched_expedited(void)
                 init_completion(&req->done);
                 req->task = NULL;
                 req->dest_cpu = RCU_MIGRATION_NEED_QS;
-                spin_lock_irqsave(&rq->lock, flags);
+                raw_spin_lock_irqsave(&rq->lock, flags);
                 list_add(&req->list, &rq->migration_queue);
-                spin_unlock_irqrestore(&rq->lock, flags);
+                raw_spin_unlock_irqrestore(&rq->lock, flags);
                 wake_up_process(rq->migration_thread);
         }
         for_each_online_cpu(cpu) {
@@ -10894,13 +10984,14 @@ void synchronize_sched_expedited(void)
                 req = &per_cpu(rcu_migration_req, cpu);
                 rq = cpu_rq(cpu);
                 wait_for_completion(&req->done);
-                spin_lock_irqsave(&rq->lock, flags);
+                raw_spin_lock_irqsave(&rq->lock, flags);
                 if (unlikely(req->dest_cpu == RCU_MIGRATION_MUST_SYNC))
                         need_full_sync = 1;
                 req->dest_cpu = RCU_MIGRATION_IDLE;
-                spin_unlock_irqrestore(&rq->lock, flags);
+                raw_spin_unlock_irqrestore(&rq->lock, flags);
         }
         rcu_expedited_state = RCU_EXPEDITED_STATE_IDLE;
+        synchronize_sched_expedited_count++;
         mutex_unlock(&rcu_sched_expedited_mutex);
         put_online_cpus();
         if (need_full_sync)
diff --git a/kernel/sched_cpupri.c b/kernel/sched_cpupri.c
index 0f052fc674d5..597b33099dfa 100644
--- a/kernel/sched_cpupri.c
+++ b/kernel/sched_cpupri.c
@@ -135,26 +135,26 @@ void cpupri_set(struct cpupri *cp, int cpu, int newpri)
         if (likely(newpri != CPUPRI_INVALID)) {
                 struct cpupri_vec *vec = &cp->pri_to_cpu[newpri];
 
-                spin_lock_irqsave(&vec->lock, flags);
+                raw_spin_lock_irqsave(&vec->lock, flags);
 
                 cpumask_set_cpu(cpu, vec->mask);
                 vec->count++;
                 if (vec->count == 1)
                         set_bit(newpri, cp->pri_active);
 
-                spin_unlock_irqrestore(&vec->lock, flags);
+                raw_spin_unlock_irqrestore(&vec->lock, flags);
         }
         if (likely(oldpri != CPUPRI_INVALID)) {
                 struct cpupri_vec *vec  = &cp->pri_to_cpu[oldpri];
 
-                spin_lock_irqsave(&vec->lock, flags);
+                raw_spin_lock_irqsave(&vec->lock, flags);
 
                 vec->count--;
                 if (!vec->count)
                         clear_bit(oldpri, cp->pri_active);
                 cpumask_clear_cpu(cpu, vec->mask);
 
-                spin_unlock_irqrestore(&vec->lock, flags);
+                raw_spin_unlock_irqrestore(&vec->lock, flags);
         }
 
         *currpri = newpri;
@@ -180,7 +180,7 @@ int cpupri_init(struct cpupri *cp, bool bootmem)
         for (i = 0; i < CPUPRI_NR_PRIORITIES; i++) {
                 struct cpupri_vec *vec = &cp->pri_to_cpu[i];
 
-                spin_lock_init(&vec->lock);
+                raw_spin_lock_init(&vec->lock);
                 vec->count = 0;
                 if (!zalloc_cpumask_var(&vec->mask, gfp))
                         goto cleanup;
diff --git a/kernel/sched_cpupri.h b/kernel/sched_cpupri.h
index 9a7e859b8fbf..7cb5bb6b95be 100644
--- a/kernel/sched_cpupri.h
+++ b/kernel/sched_cpupri.h
@@ -12,7 +12,7 @@
 /* values 2-101 are RT priorities 0-99 */
 
 struct cpupri_vec {
-        spinlock_t lock;
+        raw_spinlock_t lock;
         int        count;
         cpumask_var_t mask;
 };
diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c
index efb84409bc43..67f95aada4b9 100644
--- a/kernel/sched_debug.c
+++ b/kernel/sched_debug.c
@@ -184,7 +184,7 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
         SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "exec_clock",
                         SPLIT_NS(cfs_rq->exec_clock));
 
-        spin_lock_irqsave(&rq->lock, flags);
+        raw_spin_lock_irqsave(&rq->lock, flags);
         if (cfs_rq->rb_leftmost)
                 MIN_vruntime = (__pick_next_entity(cfs_rq))->vruntime;
         last = __pick_last_entity(cfs_rq);
@@ -192,7 +192,7 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
                 max_vruntime = last->vruntime;
         min_vruntime = cfs_rq->min_vruntime;
         rq0_min_vruntime = cpu_rq(0)->cfs.min_vruntime;
-        spin_unlock_irqrestore(&rq->lock, flags);
+        raw_spin_unlock_irqrestore(&rq->lock, flags);
         SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "MIN_vruntime",
                         SPLIT_NS(MIN_vruntime));
         SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "min_vruntime",
@@ -285,12 +285,16 @@ static void print_cpu(struct seq_file *m, int cpu)
 
 #ifdef CONFIG_SCHEDSTATS
 #define P(n) SEQ_printf(m, "  .%-30s: %d\n", #n, rq->n);
+#define P64(n) SEQ_printf(m, "  .%-30s: %Ld\n", #n, rq->n);
 
         P(yld_count);
 
         P(sched_switch);
         P(sched_count);
         P(sched_goidle);
+#ifdef CONFIG_SMP
+        P64(avg_idle);
+#endif
 
         P(ttwu_count);
         P(ttwu_local);
@@ -305,6 +309,12 @@ static void print_cpu(struct seq_file *m, int cpu)
         print_rq(m, rq, cpu);
 }
 
+static const char *sched_tunable_scaling_names[] = {
+        "none",
+        "logaritmic",
+        "linear"
+};
+
 static int sched_debug_show(struct seq_file *m, void *v)
 {
         u64 now = ktime_to_ns(ktime_get());
@@ -330,6 +340,10 @@ static int sched_debug_show(struct seq_file *m, void *v)
 #undef PN
 #undef P
 
+        SEQ_printf(m, "  .%-40s: %d (%s)\n", "sysctl_sched_tunable_scaling",
+                sysctl_sched_tunable_scaling,
+                sched_tunable_scaling_names[sysctl_sched_tunable_scaling]);
+
         for_each_online_cpu(cpu)
                 print_cpu(m, cpu);
 
@@ -395,7 +409,6 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
         PN(se.sum_exec_runtime);
         PN(se.avg_overlap);
         PN(se.avg_wakeup);
-        PN(se.avg_running);
 
         nr_switches = p->nvcsw + p->nivcsw;
 
@@ -419,7 +432,6 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
         P(se.nr_failed_migrations_running);
         P(se.nr_failed_migrations_hot);
         P(se.nr_forced_migrations);
-        P(se.nr_forced2_migrations);
         P(se.nr_wakeups);
         P(se.nr_wakeups_sync);
         P(se.nr_wakeups_migrate);
@@ -495,7 +507,6 @@ void proc_sched_set_task(struct task_struct *p)
         p->se.nr_failed_migrations_running      = 0;
         p->se.nr_failed_migrations_hot          = 0;
         p->se.nr_forced_migrations              = 0;
-        p->se.nr_forced2_migrations             = 0;
         p->se.nr_wakeups                        = 0;
         p->se.nr_wakeups_sync                   = 0;
         p->se.nr_wakeups_migrate                = 0;
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 37087a7fac22..5bedf6e3ebf3 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -21,6 +21,7 @@
  */
 
 #include <linux/latencytop.h>
+#include <linux/sched.h>
 
 /*
  * Targeted preemption latency for CPU-bound tasks:
@@ -35,12 +36,26 @@
  *  run vmstat and monitor the context-switches (cs) field)
  */
 unsigned int sysctl_sched_latency = 5000000ULL;
+unsigned int normalized_sysctl_sched_latency = 5000000ULL;
+
+/*
+ * The initial- and re-scaling of tunables is configurable
+ * (default SCHED_TUNABLESCALING_LOG = *(1+ilog(ncpus))
+ *
+ * Options are:
+ * SCHED_TUNABLESCALING_NONE - unscaled, always *1
+ * SCHED_TUNABLESCALING_LOG - scaled logarithmical, *1+ilog(ncpus)
+ * SCHED_TUNABLESCALING_LINEAR - scaled linear, *ncpus
+ */
+enum sched_tunable_scaling sysctl_sched_tunable_scaling
+        = SCHED_TUNABLESCALING_LOG;
 
 /*
  * Minimal preemption granularity for CPU-bound tasks:
  * (default: 1 msec * (1 + ilog(ncpus)), units: nanoseconds)
  */
 unsigned int sysctl_sched_min_granularity = 1000000ULL;
+unsigned int normalized_sysctl_sched_min_granularity = 1000000ULL;
 
 /*
  * is kept at sysctl_sched_latency / sysctl_sched_min_granularity
@@ -70,6 +85,7 @@ unsigned int __read_mostly sysctl_sched_compat_yield;
  * have immediate wakeup/sleep latencies.
  */
 unsigned int sysctl_sched_wakeup_granularity = 1000000UL;
+unsigned int normalized_sysctl_sched_wakeup_granularity = 1000000UL;
 
 const_debug unsigned int sysctl_sched_migration_cost = 500000UL;
 
@@ -383,11 +399,12 @@ static struct sched_entity *__pick_last_entity(struct cfs_rq *cfs_rq)
  */
 
 #ifdef CONFIG_SCHED_DEBUG
-int sched_nr_latency_handler(struct ctl_table *table, int write,
+int sched_proc_update_handler(struct ctl_table *table, int write,
                 void __user *buffer, size_t *lenp,
                 loff_t *ppos)
 {
         int ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
+        int factor = get_update_sysctl_factor();
 
         if (ret || !write)
                 return ret;
@@ -395,6 +412,14 @@ int sched_nr_latency_handler(struct ctl_table *table, int write,
         sched_nr_latency = DIV_ROUND_UP(sysctl_sched_latency,
                                         sysctl_sched_min_granularity);
 
+#define WRT_SYSCTL(name) \
+        (normalized_sysctl_##name = sysctl_##name / (factor))
+        WRT_SYSCTL(sched_min_granularity);
+        WRT_SYSCTL(sched_latency);
+        WRT_SYSCTL(sched_wakeup_granularity);
+        WRT_SYSCTL(sched_shares_ratelimit);
+#undef WRT_SYSCTL
+
         return 0;
 }
 #endif
@@ -1345,6 +1370,37 @@ find_idlest_cpu(struct sched_group *group, struct task_struct *p, int this_cpu)
 }
 
 /*
+ * Try and locate an idle CPU in the sched_domain.
+ */
+static int
+select_idle_sibling(struct task_struct *p, struct sched_domain *sd, int target)
+{
+        int cpu = smp_processor_id();
+        int prev_cpu = task_cpu(p);
+        int i;
+
+        /*
+         * If this domain spans both cpu and prev_cpu (see the SD_WAKE_AFFINE
+         * test in select_task_rq_fair) and the prev_cpu is idle then that's
+         * always a better target than the current cpu.
+         */
+        if (target == cpu && !cpu_rq(prev_cpu)->cfs.nr_running)
+                return prev_cpu;
+
+        /*
+         * Otherwise, iterate the domain and find an elegible idle cpu.
+         */
+        for_each_cpu_and(i, sched_domain_span(sd), &p->cpus_allowed) {
+                if (!cpu_rq(i)->cfs.nr_running) {
+                        target = i;
+                        break;
+                }
+        }
+
+        return target;
+}
+
+/*
  * sched_balance_self: balance the current task (running on cpu) in domains
  * that have the 'flag' flag set. In practice, this is SD_BALANCE_FORK and
  * SD_BALANCE_EXEC.
@@ -1372,7 +1428,6 @@ static int select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flag
                 new_cpu = prev_cpu;
         }
 
-        rcu_read_lock();
         for_each_domain(cpu, tmp) {
                 /*
                  * If power savings logic is enabled for a domain, see if we
@@ -1398,11 +1453,35 @@ static int select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flag
                                 want_sd = 0;
                 }
 
-                if (want_affine && (tmp->flags & SD_WAKE_AFFINE) &&
-                    cpumask_test_cpu(prev_cpu, sched_domain_span(tmp))) {
+                /*
+                 * While iterating the domains looking for a spanning
+                 * WAKE_AFFINE domain, adjust the affine target to any idle cpu
+                 * in cache sharing domains along the way.
+                 */
+                if (want_affine) {
+                        int target = -1;
+
+                        /*
+                         * If both cpu and prev_cpu are part of this domain,
+                         * cpu is a valid SD_WAKE_AFFINE target.
+                         */
+                        if (cpumask_test_cpu(prev_cpu, sched_domain_span(tmp)))
+                                target = cpu;
 
-                        affine_sd = tmp;
-                        want_affine = 0;
+                        /*
+                         * If there's an idle sibling in this domain, make that
+                         * the wake_affine target instead of the current cpu.
+                         */
+                        if (tmp->flags & SD_PREFER_SIBLING)
+                                target = select_idle_sibling(p, tmp, target);
+
+                        if (target >= 0) {
+                                if (tmp->flags & SD_WAKE_AFFINE) {
+                                        affine_sd = tmp;
+                                        want_affine = 0;
+                                }
+                                cpu = target;
+                        }
                 }
 
                 if (!want_sd && !want_affine)
@@ -1429,10 +1508,8 @@ static int select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flag
                         update_shares(tmp);
         }
 
-        if (affine_sd && wake_affine(affine_sd, p, sync)) {
-                new_cpu = cpu;
-                goto out;
-        }
+        if (affine_sd && wake_affine(affine_sd, p, sync))
+                return cpu;
 
         while (sd) {
                 int load_idx = sd->forkexec_idx;
@@ -1473,8 +1550,6 @@ static int select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flag
                 /* while loop will break here if sd == NULL */
         }
 
-out:
-        rcu_read_unlock();
         return new_cpu;
 }
 #endif /* CONFIG_SMP */
@@ -1596,12 +1671,8 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p, int wake_
         int sync = wake_flags & WF_SYNC;
         int scale = cfs_rq->nr_running >= sched_nr_latency;
 
-        update_curr(cfs_rq);
-
-        if (unlikely(rt_prio(p->prio))) {
-                resched_task(curr);
-                return;
-        }
+        if (unlikely(rt_prio(p->prio)))
+                goto preempt;
 
         if (unlikely(p->sched_class != &fair_sched_class))
                 return;
@@ -1627,50 +1698,44 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p, int wake_
                 return;
 
         /* Idle tasks are by definition preempted by everybody. */
-        if (unlikely(curr->policy == SCHED_IDLE)) {
-                resched_task(curr);
-                return;
-        }
+        if (unlikely(curr->policy == SCHED_IDLE))
+                goto preempt;
 
-        if ((sched_feat(WAKEUP_SYNC) && sync) ||
-            (sched_feat(WAKEUP_OVERLAP) &&
-             (se->avg_overlap < sysctl_sched_migration_cost &&
-              pse->avg_overlap < sysctl_sched_migration_cost))) {
-                resched_task(curr);
-                return;
-        }
+        if (sched_feat(WAKEUP_SYNC) && sync)
+                goto preempt;
 
-        if (sched_feat(WAKEUP_RUNNING)) {
-                if (pse->avg_running < se->avg_running) {
-                        set_next_buddy(pse);
-                        resched_task(curr);
-                        return;
-                }
-        }
+        if (sched_feat(WAKEUP_OVERLAP) &&
+                        se->avg_overlap < sysctl_sched_migration_cost &&
+                        pse->avg_overlap < sysctl_sched_migration_cost)
+                goto preempt;
 
         if (!sched_feat(WAKEUP_PREEMPT))
                 return;
 
+        update_curr(cfs_rq);
         find_matching_se(&se, &pse);
-
         BUG_ON(!pse);
+        if (wakeup_preempt_entity(se, pse) == 1)
+                goto preempt;
 
-        if (wakeup_preempt_entity(se, pse) == 1) {
-                resched_task(curr);
-                /*
-                 * Only set the backward buddy when the current task is still
-                 * on the rq. This can happen when a wakeup gets interleaved
-                 * with schedule on the ->pre_schedule() or idle_balance()
-                 * point, either of which can * drop the rq lock.
-                 *
-                 * Also, during early boot the idle thread is in the fair class,
-                 * for obvious reasons its a bad idea to schedule back to it.
-                 */
-                if (unlikely(!se->on_rq || curr == rq->idle))
-                        return;
-                if (sched_feat(LAST_BUDDY) && scale && entity_is_task(se))
-                        set_last_buddy(se);
-        }
+        return;
+
+preempt:
+        resched_task(curr);
+        /*
+         * Only set the backward buddy when the current task is still
+         * on the rq. This can happen when a wakeup gets interleaved
+         * with schedule on the ->pre_schedule() or idle_balance()
+         * point, either of which can * drop the rq lock.
+         *
+         * Also, during early boot the idle thread is in the fair class,
+         * for obvious reasons its a bad idea to schedule back to it.
+         */
+        if (unlikely(!se->on_rq || curr == rq->idle))
+                return;
+
+        if (sched_feat(LAST_BUDDY) && scale && entity_is_task(se))
+                set_last_buddy(se);
 }
 
 static struct task_struct *pick_next_task_fair(struct rq *rq)
@@ -1679,7 +1744,7 @@ static struct task_struct *pick_next_task_fair(struct rq *rq)
         struct cfs_rq *cfs_rq = &rq->cfs;
         struct sched_entity *se;
 
-        if (unlikely(!cfs_rq->nr_running))
+        if (!cfs_rq->nr_running)
                 return NULL;
 
         do {
@@ -1850,6 +1915,17 @@ move_one_task_fair(struct rq *this_rq, int this_cpu, struct rq *busiest,
 
         return 0;
 }
+
+static void rq_online_fair(struct rq *rq)
+{
+        update_sysctl();
+}
+
+static void rq_offline_fair(struct rq *rq)
+{
+        update_sysctl();
+}
+
 #endif /* CONFIG_SMP */
 
 /*
@@ -1867,28 +1943,30 @@ static void task_tick_fair(struct rq *rq, struct task_struct *curr, int queued)
 }
 
 /*
- * Share the fairness runtime between parent and child, thus the
- * total amount of pressure for CPU stays equal - new tasks
- * get a chance to run but frequent forkers are not allowed to
- * monopolize the CPU. Note: the parent runqueue is locked,
- * the child is not running yet.
+ * called on fork with the child task as argument from the parent's context
+ *  - child not yet on the tasklist
+ *  - preemption disabled
  */
-static void task_new_fair(struct rq *rq, struct task_struct *p)
+static void task_fork_fair(struct task_struct *p)
 {
-        struct cfs_rq *cfs_rq = task_cfs_rq(p);
+        struct cfs_rq *cfs_rq = task_cfs_rq(current);
         struct sched_entity *se = &p->se, *curr = cfs_rq->curr;
         int this_cpu = smp_processor_id();
+        struct rq *rq = this_rq();
+        unsigned long flags;
+
+        raw_spin_lock_irqsave(&rq->lock, flags);
 
-        sched_info_queued(p);
+        if (unlikely(task_cpu(p) != this_cpu))
+                __set_task_cpu(p, this_cpu);
 
         update_curr(cfs_rq);
+
         if (curr)
                 se->vruntime = curr->vruntime;
         place_entity(cfs_rq, se, 1);
 
-        /* 'curr' will be NULL if the child belongs to a different group */
-        if (sysctl_sched_child_runs_first && this_cpu == task_cpu(p) &&
-                        curr && entity_before(curr, se)) {
+        if (sysctl_sched_child_runs_first && curr && entity_before(curr, se)) {
                 /*
                  * Upon rescheduling, sched_class::put_prev_task() will place
                  * 'current' within the tree based on its new key value.
@@ -1897,7 +1975,7 @@ static void task_new_fair(struct rq *rq, struct task_struct *p)
                 resched_task(rq->curr);
         }
 
-        enqueue_task_fair(rq, p, 0);
+        raw_spin_unlock_irqrestore(&rq->lock, flags);
 }
 
 /*
@@ -1959,21 +2037,17 @@ static void moved_group_fair(struct task_struct *p)
 }
 #endif
 
-unsigned int get_rr_interval_fair(struct task_struct *task)
+unsigned int get_rr_interval_fair(struct rq *rq, struct task_struct *task)
 {
         struct sched_entity *se = &task->se;
-        unsigned long flags;
-        struct rq *rq;
         unsigned int rr_interval = 0;
 
         /*
          * Time slice is 0 for SCHED_OTHER tasks that are on an otherwise
          * idle runqueue:
          */
-        rq = task_rq_lock(task, &flags);
         if (rq->cfs.load.weight)
                 rr_interval = NS_TO_JIFFIES(sched_slice(&rq->cfs, se));
-        task_rq_unlock(rq, &flags);
 
         return rr_interval;
 }
@@ -1997,11 +2071,13 @@ static const struct sched_class fair_sched_class = {
 
         .load_balance           = load_balance_fair,
         .move_one_task          = move_one_task_fair,
+        .rq_online              = rq_online_fair,
+        .rq_offline             = rq_offline_fair,
 #endif
 
         .set_curr_task          = set_curr_task_fair,
         .task_tick              = task_tick_fair,
-        .task_new               = task_new_fair,
+        .task_fork              = task_fork_fair,
 
         .prio_changed           = prio_changed_fair,
         .switched_to            = switched_to_fair,
diff --git a/kernel/sched_features.h b/kernel/sched_features.h
index 0d94083582c7..d5059fd761d9 100644
--- a/kernel/sched_features.h
+++ b/kernel/sched_features.h
@@ -54,11 +54,6 @@ SCHED_FEAT(WAKEUP_SYNC, 0)
 SCHED_FEAT(WAKEUP_OVERLAP, 0)
 
 /*
- * Wakeup preemption towards tasks that run short
- */
-SCHED_FEAT(WAKEUP_RUNNING, 0)
-
-/*
  * Use the SYNC wakeup hint, pipes and the likes use this to indicate
  * the remote end is likely to consume the data we just wrote, and
  * therefore has cache benefit from being placed on the same cpu, see
diff --git a/kernel/sched_idletask.c b/kernel/sched_idletask.c
index b133a28fcde3..5f93b570d383 100644
--- a/kernel/sched_idletask.c
+++ b/kernel/sched_idletask.c
@@ -34,10 +34,10 @@ static struct task_struct *pick_next_task_idle(struct rq *rq)
 static void
 dequeue_task_idle(struct rq *rq, struct task_struct *p, int sleep)
 {
-        spin_unlock_irq(&rq->lock);
+        raw_spin_unlock_irq(&rq->lock);
         printk(KERN_ERR "bad: scheduling from the idle thread!\n");
         dump_stack();
-        spin_lock_irq(&rq->lock);
+        raw_spin_lock_irq(&rq->lock);
 }
 
 static void put_prev_task_idle(struct rq *rq, struct task_struct *prev)
@@ -97,7 +97,7 @@ static void prio_changed_idle(struct rq *rq, struct task_struct *p,
                 check_preempt_curr(rq, p, 0);
 }
 
-unsigned int get_rr_interval_idle(struct task_struct *task)
+unsigned int get_rr_interval_idle(struct rq *rq, struct task_struct *task)
 {
         return 0;
 }
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index a4d790cddb19..d2ea2828164e 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -327,7 +327,7 @@ static int do_balance_runtime(struct rt_rq *rt_rq)
 
         weight = cpumask_weight(rd->span);
 
-        spin_lock(&rt_b->rt_runtime_lock);
+        raw_spin_lock(&rt_b->rt_runtime_lock);
         rt_period = ktime_to_ns(rt_b->rt_period);
         for_each_cpu(i, rd->span) {
                 struct rt_rq *iter = sched_rt_period_rt_rq(rt_b, i);
@@ -336,7 +336,7 @@ static int do_balance_runtime(struct rt_rq *rt_rq)
                 if (iter == rt_rq)
                         continue;
 
-                spin_lock(&iter->rt_runtime_lock);
+                raw_spin_lock(&iter->rt_runtime_lock);
                 /*
                  * Either all rqs have inf runtime and there's nothing to steal
                  * or __disable_runtime() below sets a specific rq to inf to
@@ -358,14 +358,14 @@ static int do_balance_runtime(struct rt_rq *rt_rq)
                         rt_rq->rt_runtime += diff;
                         more = 1;
                         if (rt_rq->rt_runtime == rt_period) {
-                                spin_unlock(&iter->rt_runtime_lock);
+                                raw_spin_unlock(&iter->rt_runtime_lock);
                                 break;
                         }
                 }
 next:
-                spin_unlock(&iter->rt_runtime_lock);
+                raw_spin_unlock(&iter->rt_runtime_lock);
         }
-        spin_unlock(&rt_b->rt_runtime_lock);
+        raw_spin_unlock(&rt_b->rt_runtime_lock);
 
         return more;
 }
@@ -386,8 +386,8 @@ static void __disable_runtime(struct rq *rq)
                 s64 want;
                 int i;
 
-                spin_lock(&rt_b->rt_runtime_lock);
-                spin_lock(&rt_rq->rt_runtime_lock);
+                raw_spin_lock(&rt_b->rt_runtime_lock);
+                raw_spin_lock(&rt_rq->rt_runtime_lock);
                 /*
                  * Either we're all inf and nobody needs to borrow, or we're
                  * already disabled and thus have nothing to do, or we have
@@ -396,7 +396,7 @@ static void __disable_runtime(struct rq *rq)
                 if (rt_rq->rt_runtime == RUNTIME_INF ||
                                 rt_rq->rt_runtime == rt_b->rt_runtime)
                         goto balanced;
-                spin_unlock(&rt_rq->rt_runtime_lock);
+                raw_spin_unlock(&rt_rq->rt_runtime_lock);
 
                 /*
                  * Calculate the difference between what we started out with
@@ -418,7 +418,7 @@ static void __disable_runtime(struct rq *rq)
                         if (iter == rt_rq || iter->rt_runtime == RUNTIME_INF)
                                 continue;
 
-                        spin_lock(&iter->rt_runtime_lock);
+                        raw_spin_lock(&iter->rt_runtime_lock);
                         if (want > 0) {
                                 diff = min_t(s64, iter->rt_runtime, want);
                                 iter->rt_runtime -= diff;
@@ -427,13 +427,13 @@ static void __disable_runtime(struct rq *rq)
                                 iter->rt_runtime -= want;
                                 want -= want;
                         }
-                        spin_unlock(&iter->rt_runtime_lock);
+                        raw_spin_unlock(&iter->rt_runtime_lock);
 
                         if (!want)
                                 break;
                 }
 
-                spin_lock(&rt_rq->rt_runtime_lock);
+                raw_spin_lock(&rt_rq->rt_runtime_lock);
                 /*
                  * We cannot be left wanting - that would mean some runtime
                  * leaked out of the system.
@@ -445,8 +445,8 @@ balanced:
                  * runtime - in which case borrowing doesn't make sense.
                  */
                 rt_rq->rt_runtime = RUNTIME_INF;
-                spin_unlock(&rt_rq->rt_runtime_lock);
-                spin_unlock(&rt_b->rt_runtime_lock);
+                raw_spin_unlock(&rt_rq->rt_runtime_lock);
+                raw_spin_unlock(&rt_b->rt_runtime_lock);
         }
 }
 
@@ -454,9 +454,9 @@ static void disable_runtime(struct rq *rq)
 {
         unsigned long flags;
 
-        spin_lock_irqsave(&rq->lock, flags);
+        raw_spin_lock_irqsave(&rq->lock, flags);
         __disable_runtime(rq);
-        spin_unlock_irqrestore(&rq->lock, flags);
+        raw_spin_unlock_irqrestore(&rq->lock, flags);
 }
 
 static void __enable_runtime(struct rq *rq)
@@ -472,13 +472,13 @@ static void __enable_runtime(struct rq *rq)
         for_each_leaf_rt_rq(rt_rq, rq) {
                 struct rt_bandwidth *rt_b = sched_rt_bandwidth(rt_rq);
 
-                spin_lock(&rt_b->rt_runtime_lock);
-                spin_lock(&rt_rq->rt_runtime_lock);
+                raw_spin_lock(&rt_b->rt_runtime_lock);
+                raw_spin_lock(&rt_rq->rt_runtime_lock);
                 rt_rq->rt_runtime = rt_b->rt_runtime;
                 rt_rq->rt_time = 0;
                 rt_rq->rt_throttled = 0;
-                spin_unlock(&rt_rq->rt_runtime_lock);
-                spin_unlock(&rt_b->rt_runtime_lock);
+                raw_spin_unlock(&rt_rq->rt_runtime_lock);
+                raw_spin_unlock(&rt_b->rt_runtime_lock);
         }
 }
 
@@ -486,9 +486,9 @@ static void enable_runtime(struct rq *rq)
 {
         unsigned long flags;
 
-        spin_lock_irqsave(&rq->lock, flags);
+        raw_spin_lock_irqsave(&rq->lock, flags);
         __enable_runtime(rq);
-        spin_unlock_irqrestore(&rq->lock, flags);
+        raw_spin_unlock_irqrestore(&rq->lock, flags);
 }
 
 static int balance_runtime(struct rt_rq *rt_rq)
@@ -496,9 +496,9 @@ static int balance_runtime(struct rt_rq *rt_rq)
         int more = 0;
 
         if (rt_rq->rt_time > rt_rq->rt_runtime) {
-                spin_unlock(&rt_rq->rt_runtime_lock);
+                raw_spin_unlock(&rt_rq->rt_runtime_lock);
                 more = do_balance_runtime(rt_rq);
-                spin_lock(&rt_rq->rt_runtime_lock);
+                raw_spin_lock(&rt_rq->rt_runtime_lock);
         }
 
         return more;
@@ -524,11 +524,11 @@ static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun)
                 struct rt_rq *rt_rq = sched_rt_period_rt_rq(rt_b, i);
                 struct rq *rq = rq_of_rt_rq(rt_rq);
 
-                spin_lock(&rq->lock);
+                raw_spin_lock(&rq->lock);
                 if (rt_rq->rt_time) {
                         u64 runtime;
 
-                        spin_lock(&rt_rq->rt_runtime_lock);
+                        raw_spin_lock(&rt_rq->rt_runtime_lock);
                         if (rt_rq->rt_throttled)
                                 balance_runtime(rt_rq);
                         runtime = rt_rq->rt_runtime;
@@ -539,13 +539,13 @@ static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun)
                         }
                         if (rt_rq->rt_time || rt_rq->rt_nr_running)
                                 idle = 0;
-                        spin_unlock(&rt_rq->rt_runtime_lock);
+                        raw_spin_unlock(&rt_rq->rt_runtime_lock);
                 } else if (rt_rq->rt_nr_running)
                         idle = 0;
 
                 if (enqueue)
                         sched_rt_rq_enqueue(rt_rq);
-                spin_unlock(&rq->lock);
+                raw_spin_unlock(&rq->lock);
         }
 
         return idle;
@@ -624,11 +624,11 @@ static void update_curr_rt(struct rq *rq)
                 rt_rq = rt_rq_of_se(rt_se);
 
                 if (sched_rt_runtime(rt_rq) != RUNTIME_INF) {
-                        spin_lock(&rt_rq->rt_runtime_lock);
+                        raw_spin_lock(&rt_rq->rt_runtime_lock);
                         rt_rq->rt_time += delta_exec;
                         if (sched_rt_runtime_exceeded(rt_rq))
                                 resched_task(curr);
-                        spin_unlock(&rt_rq->rt_runtime_lock);
+                        raw_spin_unlock(&rt_rq->rt_runtime_lock);
                 }
         }
 }
@@ -1153,29 +1153,12 @@ static struct task_struct *pick_next_highest_task_rt(struct rq *rq, int cpu)
 
 static DEFINE_PER_CPU(cpumask_var_t, local_cpu_mask);
 
-static inline int pick_optimal_cpu(int this_cpu,
-                                   const struct cpumask *mask)
-{
-        int first;
-
-        /* "this_cpu" is cheaper to preempt than a remote processor */
-        if ((this_cpu != -1) && cpumask_test_cpu(this_cpu, mask))
-                return this_cpu;
-
-        first = cpumask_first(mask);
-        if (first < nr_cpu_ids)
-                return first;
-
-        return -1;
-}
-
 static int find_lowest_rq(struct task_struct *task)
 {
         struct sched_domain *sd;
         struct cpumask *lowest_mask = __get_cpu_var(local_cpu_mask);
         int this_cpu = smp_processor_id();
         int cpu      = task_cpu(task);
-        cpumask_var_t domain_mask;
 
         if (task->rt.nr_cpus_allowed == 1)
                 return -1; /* No other targets possible */
@@ -1198,28 +1181,26 @@ static int find_lowest_rq(struct task_struct *task)
          * Otherwise, we consult the sched_domains span maps to figure
          * out which cpu is logically closest to our hot cache data.
          */
-        if (this_cpu == cpu)
-                this_cpu = -1; /* Skip this_cpu opt if the same */
-
-        if (alloc_cpumask_var(&domain_mask, GFP_ATOMIC)) {
-                for_each_domain(cpu, sd) {
-                        if (sd->flags & SD_WAKE_AFFINE) {
-                                int best_cpu;
+        if (!cpumask_test_cpu(this_cpu, lowest_mask))
+                this_cpu = -1; /* Skip this_cpu opt if not among lowest */
 
-                                cpumask_and(domain_mask,
-                                            sched_domain_span(sd),
-                                            lowest_mask);
+        for_each_domain(cpu, sd) {
+                if (sd->flags & SD_WAKE_AFFINE) {
+                        int best_cpu;
 
-                                best_cpu = pick_optimal_cpu(this_cpu,
-                                                            domain_mask);
-
-                                if (best_cpu != -1) {
-                                        free_cpumask_var(domain_mask);
-                                        return best_cpu;
-                                }
-                        }
+                        /*
+                         * "this_cpu" is cheaper to preempt than a
+                         * remote processor.
+                         */
+                        if (this_cpu != -1 &&
+                            cpumask_test_cpu(this_cpu, sched_domain_span(sd)))
+                                return this_cpu;
+
+                        best_cpu = cpumask_first_and(lowest_mask,
+                                                     sched_domain_span(sd));
+                        if (best_cpu < nr_cpu_ids)
+                                return best_cpu;
                 }
-                free_cpumask_var(domain_mask);
         }
 
         /*
@@ -1227,7 +1208,13 @@ static int find_lowest_rq(struct task_struct *task)
          * just give the caller *something* to work with from the compatible
          * locations.
          */
-        return pick_optimal_cpu(this_cpu, lowest_mask);
+        if (this_cpu != -1)
+                return this_cpu;
+
+        cpu = cpumask_any(lowest_mask);
+        if (cpu < nr_cpu_ids)
+                return cpu;
+        return -1;
 }
 
 /* Will lock the rq it finds */
@@ -1259,7 +1246,7 @@ static struct rq *find_lock_lowest_rq(struct task_struct *task, struct rq *rq)
                                      task_running(rq, task) ||
                                      !task->se.on_rq)) {
 
-                                spin_unlock(&lowest_rq->lock);
+                                raw_spin_unlock(&lowest_rq->lock);
                                 lowest_rq = NULL;
                                 break;
                         }
@@ -1734,7 +1721,7 @@ static void set_curr_task_rt(struct rq *rq)
         dequeue_pushable_task(rq, p);
 }
 
-unsigned int get_rr_interval_rt(struct task_struct *task)
+unsigned int get_rr_interval_rt(struct rq *rq, struct task_struct *task)
 {
         /*
          * Time slice is 0 for SCHED_FIFO tasks
diff --git a/kernel/signal.c b/kernel/signal.c
index 6705320784fd..1814e68e4de3 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -22,12 +22,14 @@
 #include <linux/ptrace.h>
 #include <linux/signal.h>
 #include <linux/signalfd.h>
+#include <linux/ratelimit.h>
 #include <linux/tracehook.h>
 #include <linux/capability.h>
 #include <linux/freezer.h>
 #include <linux/pid_namespace.h>
 #include <linux/nsproxy.h>
-#include <trace/events/sched.h>
+#define CREATE_TRACE_POINTS
+#include <trace/events/signal.h>
 
 #include <asm/param.h>
 #include <asm/uaccess.h>
@@ -41,6 +43,8 @@
 
 static struct kmem_cache *sigqueue_cachep;
 
+int print_fatal_signals __read_mostly;
+
 static void __user *sig_handler(struct task_struct *t, int sig)
 {
         return t->sighand->action[sig - 1].sa.sa_handler;
@@ -159,7 +163,7 @@ int next_signal(struct sigpending *pending, sigset_t *mask)
 {
         unsigned long i, *s, *m, x;
         int sig = 0;
-        
+
         s = pending->signal.sig;
         m = mask->sig;
         switch (_NSIG_WORDS) {
@@ -184,17 +188,31 @@ int next_signal(struct sigpending *pending, sigset_t *mask)
                         sig = ffz(~x) + 1;
                 break;
         }
-        
+
         return sig;
 }
 
+static inline void print_dropped_signal(int sig)
+{
+        static DEFINE_RATELIMIT_STATE(ratelimit_state, 5 * HZ, 10);
+
+        if (!print_fatal_signals)
+                return;
+
+        if (!__ratelimit(&ratelimit_state))
+                return;
+
+        printk(KERN_INFO "%s/%d: reached RLIMIT_SIGPENDING, dropped signal %d\n",
+                                current->comm, current->pid, sig);
+}
+
 /*
  * allocate a new signal queue record
  * - this may be called without locks if and only if t == current, otherwise an
  *   appopriate lock must be held to stop the target task from exiting
  */
-static struct sigqueue *__sigqueue_alloc(struct task_struct *t, gfp_t flags,
-                                         int override_rlimit)
+static struct sigqueue *
+__sigqueue_alloc(int sig, struct task_struct *t, gfp_t flags, int override_rlimit)
 {
         struct sigqueue *q = NULL;
         struct user_struct *user;
@@ -207,10 +225,15 @@ static struct sigqueue *__sigqueue_alloc(struct task_struct *t, gfp_t flags,
          */
         user = get_uid(__task_cred(t)->user);
         atomic_inc(&user->sigpending);
+
         if (override_rlimit ||
             atomic_read(&user->sigpending) <=
-                        t->signal->rlim[RLIMIT_SIGPENDING].rlim_cur)
+                        t->signal->rlim[RLIMIT_SIGPENDING].rlim_cur) {
                 q = kmem_cache_alloc(sigqueue_cachep, flags);
+        } else {
+                print_dropped_signal(sig);
+        }
+
         if (unlikely(q == NULL)) {
                 atomic_dec(&user->sigpending);
                 free_uid(user);
@@ -400,7 +423,7 @@ still_pending:
                  */
                 info->si_signo = sig;
                 info->si_errno = 0;
-                info->si_code = 0;
+                info->si_code = SI_USER;
                 info->si_pid = 0;
                 info->si_uid = 0;
         }
@@ -584,6 +607,17 @@ static int rm_from_queue(unsigned long mask, struct sigpending *s)
         return 1;
 }
 
+static inline int is_si_special(const struct siginfo *info)
+{
+        return info <= SEND_SIG_FORCED;
+}
+
+static inline bool si_fromuser(const struct siginfo *info)
+{
+        return info == SEND_SIG_NOINFO ||
+                (!is_si_special(info) && SI_FROMUSER(info));
+}
+
 /*
  * Bad permissions for sending the signal
  * - the caller must hold at least the RCU read lock
@@ -598,7 +632,7 @@ static int check_kill_permission(int sig, struct siginfo *info,
         if (!valid_signal(sig))
                 return -EINVAL;
 
-        if (info != SEND_SIG_NOINFO && (is_si_special(info) || SI_FROMKERNEL(info)))
+        if (!si_fromuser(info))
                 return 0;
 
         error = audit_signal_info(sig, t); /* Let audit system see the signal */
@@ -834,7 +868,7 @@ static int __send_signal(int sig, struct siginfo *info, struct task_struct *t,
         struct sigqueue *q;
         int override_rlimit;
 
-        trace_sched_signal_send(sig, t);
+        trace_signal_generate(sig, info, t);
 
         assert_spin_locked(&t->sighand->siglock);
 
@@ -869,7 +903,7 @@ static int __send_signal(int sig, struct siginfo *info, struct task_struct *t,
         else
                 override_rlimit = 0;
 
-        q = __sigqueue_alloc(t, GFP_ATOMIC | __GFP_NOTRACK_FALSE_POSITIVE,
+        q = __sigqueue_alloc(sig, t, GFP_ATOMIC | __GFP_NOTRACK_FALSE_POSITIVE,
                 override_rlimit);
         if (q) {
                 list_add_tail(&q->list, &pending->list);
@@ -896,12 +930,21 @@ static int __send_signal(int sig, struct siginfo *info, struct task_struct *t,
                         break;
                 }
         } else if (!is_si_special(info)) {
-                if (sig >= SIGRTMIN && info->si_code != SI_USER)
-                /*
-                 * Queue overflow, abort.  We may abort if the signal was rt
-                 * and sent by user using something other than kill().
-                 */
+                if (sig >= SIGRTMIN && info->si_code != SI_USER) {
+                        /*
+                         * Queue overflow, abort.  We may abort if the
+                         * signal was rt and sent by user using something
+                         * other than kill().
+                         */
+                        trace_signal_overflow_fail(sig, group, info);
                         return -EAGAIN;
+                } else {
+                        /*
+                         * This is a silent loss of information.  We still
+                         * send the signal, but the *info bits are lost.
+                         */
+                        trace_signal_lose_info(sig, group, info);
+                }
         }
 
 out_set:
@@ -917,16 +960,13 @@ static int send_signal(int sig, struct siginfo *info, struct task_struct *t,
         int from_ancestor_ns = 0;
 
 #ifdef CONFIG_PID_NS
-        if (!is_si_special(info) && SI_FROMUSER(info) &&
-                        task_pid_nr_ns(current, task_active_pid_ns(t)) <= 0)
-                from_ancestor_ns = 1;
+        from_ancestor_ns = si_fromuser(info) &&
+                           !task_pid_nr_ns(current, task_active_pid_ns(t));
 #endif
 
         return __send_signal(sig, info, t, group, from_ancestor_ns);
 }
 
-int print_fatal_signals;
-
 static void print_fatal_signal(struct pt_regs *regs, int signr)
 {
         printk("%s/%d: potentially unexpected fatal signal %d.\n",
@@ -1022,12 +1062,6 @@ force_sig_info(int sig, struct siginfo *info, struct task_struct *t)
         return ret;
 }
 
-void
-force_sig_specific(int sig, struct task_struct *t)
-{
-        force_sig_info(sig, SEND_SIG_FORCED, t);
-}
-
 /*
  * Nuke all other threads in the group.
  */
@@ -1156,8 +1190,7 @@ int kill_pid_info_as_uid(int sig, struct siginfo *info, struct pid *pid,
                 goto out_unlock;
         }
         pcred = __task_cred(p);
-        if ((info == SEND_SIG_NOINFO ||
-             (!is_si_special(info) && SI_FROMUSER(info))) &&
+        if (si_fromuser(info) &&
             euid != pcred->suid && euid != pcred->uid &&
             uid  != pcred->suid && uid  != pcred->uid) {
                 ret = -EPERM;
@@ -1293,19 +1326,19 @@ EXPORT_SYMBOL(kill_pid);
  * These functions support sending signals using preallocated sigqueue
  * structures.  This is needed "because realtime applications cannot
  * afford to lose notifications of asynchronous events, like timer
- * expirations or I/O completions".  In the case of Posix Timers 
+ * expirations or I/O completions".  In the case of Posix Timers
  * we allocate the sigqueue structure from the timer_create.  If this
  * allocation fails we are able to report the failure to the application
  * with an EAGAIN error.
  */
- 
 struct sigqueue *sigqueue_alloc(void)
 {
-        struct sigqueue *q;
+        struct sigqueue *q = __sigqueue_alloc(-1, current, GFP_KERNEL, 0);
 
-        if ((q = __sigqueue_alloc(current, GFP_KERNEL, 0)))
+        if (q)
                 q->flags |= SIGQUEUE_PREALLOC;
-        return(q);
+
+        return q;
 }
 
 void sigqueue_free(struct sigqueue *q)
@@ -1807,11 +1840,6 @@ relock:
 
         for (;;) {
                 struct k_sigaction *ka;
-
-                if (unlikely(signal->group_stop_count > 0) &&
-                    do_signal_stop(0))
-                        goto relock;
-
                 /*
                  * Tracing can induce an artifical signal and choose sigaction.
                  * The return value in @signr determines the default action,
@@ -1823,6 +1851,10 @@ relock:
                 if (unlikely(signr != 0))
                         ka = return_ka;
                 else {
+                        if (unlikely(signal->group_stop_count > 0) &&
+                            do_signal_stop(0))
+                                goto relock;
+
                         signr = dequeue_signal(current, &current->blocked,
                                                info);
 
@@ -1839,6 +1871,9 @@ relock:
                         ka = &sighand->action[signr-1];
                 }
 
+                /* Trace actually delivered signals. */
+                trace_signal_deliver(signr, info, ka);
+
                 if (ka->sa.sa_handler == SIG_IGN) /* Do nothing.  */
                         continue;
                 if (ka->sa.sa_handler != SIG_DFL) {
diff --git a/kernel/slow-work.c b/kernel/slow-work.c
index 00889bd3c590..7494bbf5a270 100644
--- a/kernel/slow-work.c
+++ b/kernel/slow-work.c
@@ -49,7 +49,6 @@ static const int slow_work_max_vslow = 99;
 
 ctl_table slow_work_sysctls[] = {
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "min-threads",
                 .data           = &slow_work_min_threads,
                 .maxlen         = sizeof(unsigned),
@@ -59,7 +58,6 @@ ctl_table slow_work_sysctls[] = {
                 .extra2         = &slow_work_max_threads,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "max-threads",
                 .data           = &slow_work_max_threads,
                 .maxlen         = sizeof(unsigned),
@@ -69,16 +67,15 @@ ctl_table slow_work_sysctls[] = {
                 .extra2         = (void *) &slow_work_max_max_threads,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "vslow-percentage",
                 .data           = &vslow_work_proportion,
                 .maxlen         = sizeof(unsigned),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = (void *) &slow_work_min_vslow,
                 .extra2         = (void *) &slow_work_max_vslow,
         },
-        { .ctl_name = 0 }
+        {}
 };
 #endif
 
diff --git a/kernel/smp.c b/kernel/smp.c
index c9d1c7835c2f..de735a6637d0 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -16,11 +16,11 @@ static DEFINE_PER_CPU(struct call_single_queue, call_single_queue);
 
 static struct {
         struct list_head        queue;
-        spinlock_t              lock;
+        raw_spinlock_t          lock;
 } call_function __cacheline_aligned_in_smp =
         {
                 .queue          = LIST_HEAD_INIT(call_function.queue),
-                .lock           = __SPIN_LOCK_UNLOCKED(call_function.lock),
+                .lock           = __RAW_SPIN_LOCK_UNLOCKED(call_function.lock),
         };
 
 enum {
@@ -35,7 +35,7 @@ struct call_function_data {
 
 struct call_single_queue {
         struct list_head        list;
-        spinlock_t              lock;
+        raw_spinlock_t          lock;
 };
 
 static DEFINE_PER_CPU(struct call_function_data, cfd_data);
@@ -80,7 +80,7 @@ static int __cpuinit init_call_single_data(void)
         for_each_possible_cpu(i) {
                 struct call_single_queue *q = &per_cpu(call_single_queue, i);
 
-                spin_lock_init(&q->lock);
+                raw_spin_lock_init(&q->lock);
                 INIT_LIST_HEAD(&q->list);
         }
 
@@ -141,10 +141,10 @@ void generic_exec_single(int cpu, struct call_single_data *data, int wait)
         unsigned long flags;
         int ipi;
 
-        spin_lock_irqsave(&dst->lock, flags);
+        raw_spin_lock_irqsave(&dst->lock, flags);
         ipi = list_empty(&dst->list);
         list_add_tail(&data->list, &dst->list);
-        spin_unlock_irqrestore(&dst->lock, flags);
+        raw_spin_unlock_irqrestore(&dst->lock, flags);
 
         /*
          * The list addition should be visible before sending the IPI
@@ -171,7 +171,7 @@ void generic_exec_single(int cpu, struct call_single_data *data, int wait)
 void generic_smp_call_function_interrupt(void)
 {
         struct call_function_data *data;
-        int cpu = get_cpu();
+        int cpu = smp_processor_id();
 
         /*
          * Shouldn't receive this interrupt on a cpu that is not yet online.
@@ -201,9 +201,9 @@ void generic_smp_call_function_interrupt(void)
                 refs = atomic_dec_return(&data->refs);
                 WARN_ON(refs < 0);
                 if (!refs) {
-                        spin_lock(&call_function.lock);
+                        raw_spin_lock(&call_function.lock);
                         list_del_rcu(&data->csd.list);
-                        spin_unlock(&call_function.lock);
+                        raw_spin_unlock(&call_function.lock);
                 }
 
                 if (refs)
@@ -212,7 +212,6 @@ void generic_smp_call_function_interrupt(void)
                 csd_unlock(&data->csd);
         }
 
-        put_cpu();
 }
 
 /*
@@ -230,9 +229,9 @@ void generic_smp_call_function_single_interrupt(void)
          */
         WARN_ON_ONCE(!cpu_online(smp_processor_id()));
 
-        spin_lock(&q->lock);
+        raw_spin_lock(&q->lock);
         list_replace_init(&q->list, &list);
-        spin_unlock(&q->lock);
+        raw_spin_unlock(&q->lock);
 
         while (!list_empty(&list)) {
                 struct call_single_data *data;
@@ -265,9 +264,7 @@ static DEFINE_PER_CPU(struct call_single_data, csd_data);
  * @info: An arbitrary pointer to pass to the function.
  * @wait: If true, wait until function has completed on other CPUs.
  *
- * Returns 0 on success, else a negative status code. Note that @wait
- * will be implicitly turned on in case of allocation failures, since
- * we fall back to on-stack allocation.
+ * Returns 0 on success, else a negative status code.
  */
 int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
                              int wait)
@@ -321,6 +318,51 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
 }
 EXPORT_SYMBOL(smp_call_function_single);
 
+/*
+ * smp_call_function_any - Run a function on any of the given cpus
+ * @mask: The mask of cpus it can run on.
+ * @func: The function to run. This must be fast and non-blocking.
+ * @info: An arbitrary pointer to pass to the function.
+ * @wait: If true, wait until function has completed.
+ *
+ * Returns 0 on success, else a negative status code (if no cpus were online).
+ * Note that @wait will be implicitly turned on in case of allocation failures,
+ * since we fall back to on-stack allocation.
+ *
+ * Selection preference:
+ *      1) current cpu if in @mask
+ *      2) any cpu of current node if in @mask
+ *      3) any other online cpu in @mask
+ */
+int smp_call_function_any(const struct cpumask *mask,
+                          void (*func)(void *info), void *info, int wait)
+{
+        unsigned int cpu;
+        const struct cpumask *nodemask;
+        int ret;
+
+        /* Try for same CPU (cheapest) */
+        cpu = get_cpu();
+        if (cpumask_test_cpu(cpu, mask))
+                goto call;
+
+        /* Try for same node. */
+        nodemask = cpumask_of_node(cpu);
+        for (cpu = cpumask_first_and(nodemask, mask); cpu < nr_cpu_ids;
+             cpu = cpumask_next_and(cpu, nodemask, mask)) {
+                if (cpu_online(cpu))
+                        goto call;
+        }
+
+        /* Any online will do: smp_call_function_single handles nr_cpu_ids. */
+        cpu = cpumask_any_and(mask, cpu_online_mask);
+call:
+        ret = smp_call_function_single(cpu, func, info, wait);
+        put_cpu();
+        return ret;
+}
+EXPORT_SYMBOL_GPL(smp_call_function_any);
+
 /**
  * __smp_call_function_single(): Run a function on another CPU
  * @cpu: The CPU to run on.
@@ -355,9 +397,7 @@ void __smp_call_function_single(int cpu, struct call_single_data *data,
  * @wait: If true, wait (atomically) until function has completed
  *        on other CPUs.
  *
- * If @wait is true, then returns once @func has returned. Note that @wait
- * will be implicitly turned on in case of allocation failures, since
- * we fall back to on-stack allocation.
+ * If @wait is true, then returns once @func has returned.
  *
  * You must not call this function with disabled interrupts or from a
  * hardware interrupt handler or from a bottom half handler. Preemption
@@ -408,14 +448,14 @@ void smp_call_function_many(const struct cpumask *mask,
         cpumask_clear_cpu(this_cpu, data->cpumask);
         atomic_set(&data->refs, cpumask_weight(data->cpumask));
 
-        spin_lock_irqsave(&call_function.lock, flags);
+        raw_spin_lock_irqsave(&call_function.lock, flags);
         /*
          * Place entry at the _HEAD_ of the list, so that any cpu still
          * observing the entry in generic_smp_call_function_interrupt()
          * will not miss any other list entries:
          */
         list_add_rcu(&data->csd.list, &call_function.queue);
-        spin_unlock_irqrestore(&call_function.lock, flags);
+        raw_spin_unlock_irqrestore(&call_function.lock, flags);
 
         /*
          * Make the list addition visible before sending the ipi.
@@ -443,8 +483,7 @@ EXPORT_SYMBOL(smp_call_function_many);
  * Returns 0.
  *
  * If @wait is true, then returns once @func has returned; otherwise
- * it returns just before the target cpu calls @func. In case of allocation
- * failure, @wait will be implicitly turned on.
+ * it returns just before the target cpu calls @func.
  *
  * You must not call this function with disabled interrupts or from a
  * hardware interrupt handler or from a bottom half handler.
@@ -461,20 +500,20 @@ EXPORT_SYMBOL(smp_call_function);
 
 void ipi_call_lock(void)
 {
-        spin_lock(&call_function.lock);
+        raw_spin_lock(&call_function.lock);
 }
 
 void ipi_call_unlock(void)
 {
-        spin_unlock(&call_function.lock);
+        raw_spin_unlock(&call_function.lock);
 }
 
 void ipi_call_lock_irq(void)
 {
-        spin_lock_irq(&call_function.lock);
+        raw_spin_lock_irq(&call_function.lock);
 }
 
 void ipi_call_unlock_irq(void)
 {
-        spin_unlock_irq(&call_function.lock);
+        raw_spin_unlock_irq(&call_function.lock);
 }
diff --git a/kernel/softirq.c b/kernel/softirq.c
index f8749e5216e0..a09502e2ef75 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -302,9 +302,9 @@ void irq_exit(void)
         if (!in_interrupt() && local_softirq_pending())
                 invoke_softirq();
 
+        rcu_irq_exit();
 #ifdef CONFIG_NO_HZ
         /* Make sure that timer wheel updates are propagated */
-        rcu_irq_exit();
         if (idle_cpu(smp_processor_id()) && !in_interrupt() && !need_resched())
                 tick_nohz_stop_sched_tick(0);
 #endif
@@ -697,7 +697,7 @@ void __init softirq_init(void)
         open_softirq(HI_SOFTIRQ, tasklet_hi_action);
 }
 
-static int ksoftirqd(void * __bind_cpu)
+static int run_ksoftirqd(void * __bind_cpu)
 {
         set_current_state(TASK_INTERRUPTIBLE);
 
@@ -810,7 +810,7 @@ static int __cpuinit cpu_callback(struct notifier_block *nfb,
         switch (action) {
         case CPU_UP_PREPARE:
         case CPU_UP_PREPARE_FROZEN:
-                p = kthread_create(ksoftirqd, hcpu, "ksoftirqd/%d", hotcpu);
+                p = kthread_create(run_ksoftirqd, hcpu, "ksoftirqd/%d", hotcpu);
                 if (IS_ERR(p)) {
                         printk("ksoftirqd for %i failed\n", hotcpu);
                         return NOTIFY_BAD;
diff --git a/kernel/softlockup.c b/kernel/softlockup.c
index 81324d12eb35..d22579087e27 100644
--- a/kernel/softlockup.c
+++ b/kernel/softlockup.c
@@ -22,9 +22,9 @@
 
 static DEFINE_SPINLOCK(print_lock);
 
-static DEFINE_PER_CPU(unsigned long, touch_timestamp);
-static DEFINE_PER_CPU(unsigned long, print_timestamp);
-static DEFINE_PER_CPU(struct task_struct *, watchdog_task);
+static DEFINE_PER_CPU(unsigned long, softlockup_touch_ts); /* touch timestamp */
+static DEFINE_PER_CPU(unsigned long, softlockup_print_ts); /* print timestamp */
+static DEFINE_PER_CPU(struct task_struct *, softlockup_watchdog);
 
 static int __read_mostly did_panic;
 int __read_mostly softlockup_thresh = 60;
@@ -70,12 +70,12 @@ static void __touch_softlockup_watchdog(void)
 {
         int this_cpu = raw_smp_processor_id();
 
-        __raw_get_cpu_var(touch_timestamp) = get_timestamp(this_cpu);
+        __raw_get_cpu_var(softlockup_touch_ts) = get_timestamp(this_cpu);
 }
 
 void touch_softlockup_watchdog(void)
 {
-        __raw_get_cpu_var(touch_timestamp) = 0;
+        __raw_get_cpu_var(softlockup_touch_ts) = 0;
 }
 EXPORT_SYMBOL(touch_softlockup_watchdog);
 
@@ -85,7 +85,7 @@ void touch_all_softlockup_watchdogs(void)
 
         /* Cause each CPU to re-update its timestamp rather than complain */
         for_each_online_cpu(cpu)
-                per_cpu(touch_timestamp, cpu) = 0;
+                per_cpu(softlockup_touch_ts, cpu) = 0;
 }
 EXPORT_SYMBOL(touch_all_softlockup_watchdogs);
 
@@ -104,28 +104,28 @@ int proc_dosoftlockup_thresh(struct ctl_table *table, int write,
 void softlockup_tick(void)
 {
         int this_cpu = smp_processor_id();
-        unsigned long touch_timestamp = per_cpu(touch_timestamp, this_cpu);
-        unsigned long print_timestamp;
+        unsigned long touch_ts = per_cpu(softlockup_touch_ts, this_cpu);
+        unsigned long print_ts;
         struct pt_regs *regs = get_irq_regs();
         unsigned long now;
 
         /* Is detection switched off? */
-        if (!per_cpu(watchdog_task, this_cpu) || softlockup_thresh <= 0) {
+        if (!per_cpu(softlockup_watchdog, this_cpu) || softlockup_thresh <= 0) {
                 /* Be sure we don't false trigger if switched back on */
-                if (touch_timestamp)
-                        per_cpu(touch_timestamp, this_cpu) = 0;
+                if (touch_ts)
+                        per_cpu(softlockup_touch_ts, this_cpu) = 0;
                 return;
         }
 
-        if (touch_timestamp == 0) {
+        if (touch_ts == 0) {
                 __touch_softlockup_watchdog();
                 return;
         }
 
-        print_timestamp = per_cpu(print_timestamp, this_cpu);
+        print_ts = per_cpu(softlockup_print_ts, this_cpu);
 
         /* report at most once a second */
-        if (print_timestamp == touch_timestamp || did_panic)
+        if (print_ts == touch_ts || did_panic)
                 return;
 
         /* do not print during early bootup: */
@@ -140,18 +140,18 @@ void softlockup_tick(void)
          * Wake up the high-prio watchdog task twice per
          * threshold timespan.
          */
-        if (now > touch_timestamp + softlockup_thresh/2)
-                wake_up_process(per_cpu(watchdog_task, this_cpu));
+        if (now > touch_ts + softlockup_thresh/2)
+                wake_up_process(per_cpu(softlockup_watchdog, this_cpu));
 
         /* Warn about unreasonable delays: */
-        if (now <= (touch_timestamp + softlockup_thresh))
+        if (now <= (touch_ts + softlockup_thresh))
                 return;
 
-        per_cpu(print_timestamp, this_cpu) = touch_timestamp;
+        per_cpu(softlockup_print_ts, this_cpu) = touch_ts;
 
         spin_lock(&print_lock);
         printk(KERN_ERR "BUG: soft lockup - CPU#%d stuck for %lus! [%s:%d]\n",
-                        this_cpu, now - touch_timestamp,
+                        this_cpu, now - touch_ts,
                         current->comm, task_pid_nr(current));
         print_modules();
         print_irqtrace_events(current);
@@ -209,32 +209,32 @@ cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
         switch (action) {
         case CPU_UP_PREPARE:
         case CPU_UP_PREPARE_FROZEN:
-                BUG_ON(per_cpu(watchdog_task, hotcpu));
+                BUG_ON(per_cpu(softlockup_watchdog, hotcpu));
                 p = kthread_create(watchdog, hcpu, "watchdog/%d", hotcpu);
                 if (IS_ERR(p)) {
                         printk(KERN_ERR "watchdog for %i failed\n", hotcpu);
                         return NOTIFY_BAD;
                 }
-                per_cpu(touch_timestamp, hotcpu) = 0;
-                per_cpu(watchdog_task, hotcpu) = p;
+                per_cpu(softlockup_touch_ts, hotcpu) = 0;
+                per_cpu(softlockup_watchdog, hotcpu) = p;
                 kthread_bind(p, hotcpu);
                 break;
         case CPU_ONLINE:
         case CPU_ONLINE_FROZEN:
-                wake_up_process(per_cpu(watchdog_task, hotcpu));
+                wake_up_process(per_cpu(softlockup_watchdog, hotcpu));
                 break;
 #ifdef CONFIG_HOTPLUG_CPU
         case CPU_UP_CANCELED:
         case CPU_UP_CANCELED_FROZEN:
-                if (!per_cpu(watchdog_task, hotcpu))
+                if (!per_cpu(softlockup_watchdog, hotcpu))
                         break;
                 /* Unbind so it can run.  Fall thru. */
-                kthread_bind(per_cpu(watchdog_task, hotcpu),
+                kthread_bind(per_cpu(softlockup_watchdog, hotcpu),
                              cpumask_any(cpu_online_mask));
         case CPU_DEAD:
         case CPU_DEAD_FROZEN:
-                p = per_cpu(watchdog_task, hotcpu);
-                per_cpu(watchdog_task, hotcpu) = NULL;
+                p = per_cpu(softlockup_watchdog, hotcpu);
+                per_cpu(softlockup_watchdog, hotcpu) = NULL;
                 kthread_stop(p);
                 break;
 #endif /* CONFIG_HOTPLUG_CPU */
diff --git a/kernel/spinlock.c b/kernel/spinlock.c
index 5ddab730cb2f..be6517fb9c14 100644
--- a/kernel/spinlock.c
+++ b/kernel/spinlock.c
@@ -21,193 +21,72 @@
 #include <linux/debug_locks.h>
 #include <linux/module.h>
 
-#ifndef _spin_trylock
-int __lockfunc _spin_trylock(spinlock_t *lock)
-{
-        return __spin_trylock(lock);
-}
-EXPORT_SYMBOL(_spin_trylock);
-#endif
-
-#ifndef _read_trylock
-int __lockfunc _read_trylock(rwlock_t *lock)
-{
-        return __read_trylock(lock);
-}
-EXPORT_SYMBOL(_read_trylock);
-#endif
-
-#ifndef _write_trylock
-int __lockfunc _write_trylock(rwlock_t *lock)
-{
-        return __write_trylock(lock);
-}
-EXPORT_SYMBOL(_write_trylock);
-#endif
-
 /*
  * If lockdep is enabled then we use the non-preemption spin-ops
  * even on CONFIG_PREEMPT, because lockdep assumes that interrupts are
  * not re-enabled during lock-acquire (which the preempt-spin-ops do):
  */
 #if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC)
-
-#ifndef _read_lock
-void __lockfunc _read_lock(rwlock_t *lock)
-{
-        __read_lock(lock);
-}
-EXPORT_SYMBOL(_read_lock);
-#endif
-
-#ifndef _spin_lock_irqsave
-unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock)
-{
-        return __spin_lock_irqsave(lock);
-}
-EXPORT_SYMBOL(_spin_lock_irqsave);
-#endif
-
-#ifndef _spin_lock_irq
-void __lockfunc _spin_lock_irq(spinlock_t *lock)
-{
-        __spin_lock_irq(lock);
-}
-EXPORT_SYMBOL(_spin_lock_irq);
-#endif
-
-#ifndef _spin_lock_bh
-void __lockfunc _spin_lock_bh(spinlock_t *lock)
-{
-        __spin_lock_bh(lock);
-}
-EXPORT_SYMBOL(_spin_lock_bh);
-#endif
-
-#ifndef _read_lock_irqsave
-unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock)
-{
-        return __read_lock_irqsave(lock);
-}
-EXPORT_SYMBOL(_read_lock_irqsave);
-#endif
-
-#ifndef _read_lock_irq
-void __lockfunc _read_lock_irq(rwlock_t *lock)
-{
-        __read_lock_irq(lock);
-}
-EXPORT_SYMBOL(_read_lock_irq);
-#endif
-
-#ifndef _read_lock_bh
-void __lockfunc _read_lock_bh(rwlock_t *lock)
-{
-        __read_lock_bh(lock);
-}
-EXPORT_SYMBOL(_read_lock_bh);
-#endif
-
-#ifndef _write_lock_irqsave
-unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock)
-{
-        return __write_lock_irqsave(lock);
-}
-EXPORT_SYMBOL(_write_lock_irqsave);
-#endif
-
-#ifndef _write_lock_irq
-void __lockfunc _write_lock_irq(rwlock_t *lock)
-{
-        __write_lock_irq(lock);
-}
-EXPORT_SYMBOL(_write_lock_irq);
-#endif
-
-#ifndef _write_lock_bh
-void __lockfunc _write_lock_bh(rwlock_t *lock)
-{
-        __write_lock_bh(lock);
-}
-EXPORT_SYMBOL(_write_lock_bh);
-#endif
-
-#ifndef _spin_lock
-void __lockfunc _spin_lock(spinlock_t *lock)
-{
-        __spin_lock(lock);
-}
-EXPORT_SYMBOL(_spin_lock);
-#endif
-
-#ifndef _write_lock
-void __lockfunc _write_lock(rwlock_t *lock)
-{
-        __write_lock(lock);
-}
-EXPORT_SYMBOL(_write_lock);
-#endif
-
-#else /* CONFIG_PREEMPT: */
-
 /*
+ * The __lock_function inlines are taken from
+ * include/linux/spinlock_api_smp.h
+ */
+#else
+#define raw_read_can_lock(l)    read_can_lock(l)
+#define raw_write_can_lock(l)   write_can_lock(l)
+/*
+ * We build the __lock_function inlines here. They are too large for
+ * inlining all over the place, but here is only one user per function
+ * which embedds them into the calling _lock_function below.
+ *
  * This could be a long-held lock. We both prepare to spin for a long
  * time (making _this_ CPU preemptable if possible), and we also signal
  * towards that other CPU that it should break the lock ASAP.
- *
- * (We do this in a function because inlining it would be excessive.)
  */
-
 #define BUILD_LOCK_OPS(op, locktype)                                    \
-void __lockfunc _##op##_lock(locktype##_t *lock)                        \
+void __lockfunc __raw_##op##_lock(locktype##_t *lock)                   \
 {                                                                       \
         for (;;) {                                                      \
                 preempt_disable();                                      \
-                if (likely(_raw_##op##_trylock(lock)))                  \
+                if (likely(do_raw_##op##_trylock(lock)))                \
                         break;                                          \
                 preempt_enable();                                       \
                                                                         \
                 if (!(lock)->break_lock)                                \
                         (lock)->break_lock = 1;                         \
-                while (!op##_can_lock(lock) && (lock)->break_lock)      \
-                        _raw_##op##_relax(&lock->raw_lock);             \
+                while (!raw_##op##_can_lock(lock) && (lock)->break_lock)\
+                        arch_##op##_relax(&lock->raw_lock);             \
         }                                                               \
         (lock)->break_lock = 0;                                         \
 }                                                                       \
                                                                         \
-EXPORT_SYMBOL(_##op##_lock);                                            \
-                                                                        \
-unsigned long __lockfunc _##op##_lock_irqsave(locktype##_t *lock)       \
+unsigned long __lockfunc __raw_##op##_lock_irqsave(locktype##_t *lock)  \
 {                                                                       \
         unsigned long flags;                                            \
                                                                         \
         for (;;) {                                                      \
                 preempt_disable();                                      \
                 local_irq_save(flags);                                  \
-                if (likely(_raw_##op##_trylock(lock)))                  \
+                if (likely(do_raw_##op##_trylock(lock)))                \
                         break;                                          \
                 local_irq_restore(flags);                               \
                 preempt_enable();                                       \
                                                                         \
                 if (!(lock)->break_lock)                                \
                         (lock)->break_lock = 1;                         \
-                while (!op##_can_lock(lock) && (lock)->break_lock)      \
-                        _raw_##op##_relax(&lock->raw_lock);             \
+                while (!raw_##op##_can_lock(lock) && (lock)->break_lock)\
+                        arch_##op##_relax(&lock->raw_lock);             \
         }                                                               \
         (lock)->break_lock = 0;                                         \
         return flags;                                                   \
 }                                                                       \
                                                                         \
-EXPORT_SYMBOL(_##op##_lock_irqsave);                                    \
-                                                                        \
-void __lockfunc _##op##_lock_irq(locktype##_t *lock)                    \
+void __lockfunc __raw_##op##_lock_irq(locktype##_t *lock)               \
 {                                                                       \
-        _##op##_lock_irqsave(lock);                                     \
+        _raw_##op##_lock_irqsave(lock);                                 \
 }                                                                       \
                                                                         \
-EXPORT_SYMBOL(_##op##_lock_irq);                                        \
-                                                                        \
-void __lockfunc _##op##_lock_bh(locktype##_t *lock)                     \
+void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock)                \
 {                                                                       \
         unsigned long flags;                                            \
                                                                         \
@@ -216,164 +95,283 @@ void __lockfunc _##op##_lock_bh(locktype##_t *lock)			\
         /* irq-disabling. We use the generic preemption-aware   */      \
         /* function:                                            */      \
         /**/                                                            \
-        flags = _##op##_lock_irqsave(lock);                             \
+        flags = _raw_##op##_lock_irqsave(lock);                         \
         local_bh_disable();                                             \
         local_irq_restore(flags);                                       \
 }                                                                       \
-                                                                        \
-EXPORT_SYMBOL(_##op##_lock_bh)
 
 /*
  * Build preemption-friendly versions of the following
  * lock-spinning functions:
  *
- *         _[spin|read|write]_lock()
- *         _[spin|read|write]_lock_irq()
- *         _[spin|read|write]_lock_irqsave()
- *         _[spin|read|write]_lock_bh()
+ *         __[spin|read|write]_lock()
+ *         __[spin|read|write]_lock_irq()
+ *         __[spin|read|write]_lock_irqsave()
+ *         __[spin|read|write]_lock_bh()
  */
-BUILD_LOCK_OPS(spin, spinlock);
+BUILD_LOCK_OPS(spin, raw_spinlock);
 BUILD_LOCK_OPS(read, rwlock);
 BUILD_LOCK_OPS(write, rwlock);
 
-#endif /* CONFIG_PREEMPT */
+#endif
 
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
+#ifndef CONFIG_INLINE_SPIN_TRYLOCK
+int __lockfunc _raw_spin_trylock(raw_spinlock_t *lock)
+{
+        return __raw_spin_trylock(lock);
+}
+EXPORT_SYMBOL(_raw_spin_trylock);
+#endif
 
-void __lockfunc _spin_lock_nested(spinlock_t *lock, int subclass)
+#ifndef CONFIG_INLINE_SPIN_TRYLOCK_BH
+int __lockfunc _raw_spin_trylock_bh(raw_spinlock_t *lock)
 {
-        preempt_disable();
-        spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
-        LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
+        return __raw_spin_trylock_bh(lock);
 }
-EXPORT_SYMBOL(_spin_lock_nested);
+EXPORT_SYMBOL(_raw_spin_trylock_bh);
+#endif
 
-unsigned long __lockfunc _spin_lock_irqsave_nested(spinlock_t *lock, int subclass)
+#ifndef CONFIG_INLINE_SPIN_LOCK
+void __lockfunc _raw_spin_lock(raw_spinlock_t *lock)
 {
-        unsigned long flags;
+        __raw_spin_lock(lock);
+}
+EXPORT_SYMBOL(_raw_spin_lock);
+#endif
 
-        local_irq_save(flags);
-        preempt_disable();
-        spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
-        LOCK_CONTENDED_FLAGS(lock, _raw_spin_trylock, _raw_spin_lock,
-                                _raw_spin_lock_flags, &flags);
-        return flags;
+#ifndef CONFIG_INLINE_SPIN_LOCK_IRQSAVE
+unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock)
+{
+        return __raw_spin_lock_irqsave(lock);
 }
-EXPORT_SYMBOL(_spin_lock_irqsave_nested);
+EXPORT_SYMBOL(_raw_spin_lock_irqsave);
+#endif
 
-void __lockfunc _spin_lock_nest_lock(spinlock_t *lock,
-                                     struct lockdep_map *nest_lock)
+#ifndef CONFIG_INLINE_SPIN_LOCK_IRQ
+void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock)
 {
-        preempt_disable();
-        spin_acquire_nest(&lock->dep_map, 0, 0, nest_lock, _RET_IP_);
-        LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
+        __raw_spin_lock_irq(lock);
 }
-EXPORT_SYMBOL(_spin_lock_nest_lock);
+EXPORT_SYMBOL(_raw_spin_lock_irq);
+#endif
 
+#ifndef CONFIG_INLINE_SPIN_LOCK_BH
+void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock)
+{
+        __raw_spin_lock_bh(lock);
+}
+EXPORT_SYMBOL(_raw_spin_lock_bh);
 #endif
 
-#ifndef _spin_unlock
-void __lockfunc _spin_unlock(spinlock_t *lock)
+#ifndef CONFIG_INLINE_SPIN_UNLOCK
+void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock)
 {
-        __spin_unlock(lock);
+        __raw_spin_unlock(lock);
 }
-EXPORT_SYMBOL(_spin_unlock);
+EXPORT_SYMBOL(_raw_spin_unlock);
 #endif
 
-#ifndef _write_unlock
-void __lockfunc _write_unlock(rwlock_t *lock)
+#ifndef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE
+void __lockfunc _raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags)
 {
-        __write_unlock(lock);
+        __raw_spin_unlock_irqrestore(lock, flags);
 }
-EXPORT_SYMBOL(_write_unlock);
+EXPORT_SYMBOL(_raw_spin_unlock_irqrestore);
 #endif
 
-#ifndef _read_unlock
-void __lockfunc _read_unlock(rwlock_t *lock)
+#ifndef CONFIG_INLINE_SPIN_UNLOCK_IRQ
+void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock)
 {
-        __read_unlock(lock);
+        __raw_spin_unlock_irq(lock);
 }
-EXPORT_SYMBOL(_read_unlock);
+EXPORT_SYMBOL(_raw_spin_unlock_irq);
 #endif
 
-#ifndef _spin_unlock_irqrestore
-void __lockfunc _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags)
+#ifndef CONFIG_INLINE_SPIN_UNLOCK_BH
+void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock)
 {
-        __spin_unlock_irqrestore(lock, flags);
+        __raw_spin_unlock_bh(lock);
 }
-EXPORT_SYMBOL(_spin_unlock_irqrestore);
+EXPORT_SYMBOL(_raw_spin_unlock_bh);
 #endif
 
-#ifndef _spin_unlock_irq
-void __lockfunc _spin_unlock_irq(spinlock_t *lock)
+#ifndef CONFIG_INLINE_READ_TRYLOCK
+int __lockfunc _raw_read_trylock(rwlock_t *lock)
 {
-        __spin_unlock_irq(lock);
+        return __raw_read_trylock(lock);
 }
-EXPORT_SYMBOL(_spin_unlock_irq);
+EXPORT_SYMBOL(_raw_read_trylock);
 #endif
 
-#ifndef _spin_unlock_bh
-void __lockfunc _spin_unlock_bh(spinlock_t *lock)
+#ifndef CONFIG_INLINE_READ_LOCK
+void __lockfunc _raw_read_lock(rwlock_t *lock)
 {
-        __spin_unlock_bh(lock);
+        __raw_read_lock(lock);
 }
-EXPORT_SYMBOL(_spin_unlock_bh);
+EXPORT_SYMBOL(_raw_read_lock);
 #endif
 
-#ifndef _read_unlock_irqrestore
-void __lockfunc _read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
+#ifndef CONFIG_INLINE_READ_LOCK_IRQSAVE
+unsigned long __lockfunc _raw_read_lock_irqsave(rwlock_t *lock)
 {
-        __read_unlock_irqrestore(lock, flags);
+        return __raw_read_lock_irqsave(lock);
 }
-EXPORT_SYMBOL(_read_unlock_irqrestore);
+EXPORT_SYMBOL(_raw_read_lock_irqsave);
 #endif
 
-#ifndef _read_unlock_irq
-void __lockfunc _read_unlock_irq(rwlock_t *lock)
+#ifndef CONFIG_INLINE_READ_LOCK_IRQ
+void __lockfunc _raw_read_lock_irq(rwlock_t *lock)
 {
-        __read_unlock_irq(lock);
+        __raw_read_lock_irq(lock);
 }
-EXPORT_SYMBOL(_read_unlock_irq);
+EXPORT_SYMBOL(_raw_read_lock_irq);
 #endif
 
-#ifndef _read_unlock_bh
-void __lockfunc _read_unlock_bh(rwlock_t *lock)
+#ifndef CONFIG_INLINE_READ_LOCK_BH
+void __lockfunc _raw_read_lock_bh(rwlock_t *lock)
 {
-        __read_unlock_bh(lock);
+        __raw_read_lock_bh(lock);
 }
-EXPORT_SYMBOL(_read_unlock_bh);
+EXPORT_SYMBOL(_raw_read_lock_bh);
 #endif
 
-#ifndef _write_unlock_irqrestore
-void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
+#ifndef CONFIG_INLINE_READ_UNLOCK
+void __lockfunc _raw_read_unlock(rwlock_t *lock)
 {
-        __write_unlock_irqrestore(lock, flags);
+        __raw_read_unlock(lock);
 }
-EXPORT_SYMBOL(_write_unlock_irqrestore);
+EXPORT_SYMBOL(_raw_read_unlock);
 #endif
 
-#ifndef _write_unlock_irq
-void __lockfunc _write_unlock_irq(rwlock_t *lock)
+#ifndef CONFIG_INLINE_READ_UNLOCK_IRQRESTORE
+void __lockfunc _raw_read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
 {
-        __write_unlock_irq(lock);
+        __raw_read_unlock_irqrestore(lock, flags);
 }
-EXPORT_SYMBOL(_write_unlock_irq);
+EXPORT_SYMBOL(_raw_read_unlock_irqrestore);
 #endif
 
-#ifndef _write_unlock_bh
-void __lockfunc _write_unlock_bh(rwlock_t *lock)
+#ifndef CONFIG_INLINE_READ_UNLOCK_IRQ
+void __lockfunc _raw_read_unlock_irq(rwlock_t *lock)
 {
-        __write_unlock_bh(lock);
+        __raw_read_unlock_irq(lock);
 }
-EXPORT_SYMBOL(_write_unlock_bh);
+EXPORT_SYMBOL(_raw_read_unlock_irq);
 #endif
 
-#ifndef _spin_trylock_bh
-int __lockfunc _spin_trylock_bh(spinlock_t *lock)
+#ifndef CONFIG_INLINE_READ_UNLOCK_BH
+void __lockfunc _raw_read_unlock_bh(rwlock_t *lock)
 {
-        return __spin_trylock_bh(lock);
+        __raw_read_unlock_bh(lock);
 }
-EXPORT_SYMBOL(_spin_trylock_bh);
+EXPORT_SYMBOL(_raw_read_unlock_bh);
+#endif
+
+#ifndef CONFIG_INLINE_WRITE_TRYLOCK
+int __lockfunc _raw_write_trylock(rwlock_t *lock)
+{
+        return __raw_write_trylock(lock);
+}
+EXPORT_SYMBOL(_raw_write_trylock);
+#endif
+
+#ifndef CONFIG_INLINE_WRITE_LOCK
+void __lockfunc _raw_write_lock(rwlock_t *lock)
+{
+        __raw_write_lock(lock);
+}
+EXPORT_SYMBOL(_raw_write_lock);
+#endif
+
+#ifndef CONFIG_INLINE_WRITE_LOCK_IRQSAVE
+unsigned long __lockfunc _raw_write_lock_irqsave(rwlock_t *lock)
+{
+        return __raw_write_lock_irqsave(lock);
+}
+EXPORT_SYMBOL(_raw_write_lock_irqsave);
+#endif
+
+#ifndef CONFIG_INLINE_WRITE_LOCK_IRQ
+void __lockfunc _raw_write_lock_irq(rwlock_t *lock)
+{
+        __raw_write_lock_irq(lock);
+}
+EXPORT_SYMBOL(_raw_write_lock_irq);
+#endif
+
+#ifndef CONFIG_INLINE_WRITE_LOCK_BH
+void __lockfunc _raw_write_lock_bh(rwlock_t *lock)
+{
+        __raw_write_lock_bh(lock);
+}
+EXPORT_SYMBOL(_raw_write_lock_bh);
+#endif
+
+#ifndef CONFIG_INLINE_WRITE_UNLOCK
+void __lockfunc _raw_write_unlock(rwlock_t *lock)
+{
+        __raw_write_unlock(lock);
+}
+EXPORT_SYMBOL(_raw_write_unlock);
+#endif
+
+#ifndef CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE
+void __lockfunc _raw_write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
+{
+        __raw_write_unlock_irqrestore(lock, flags);
+}
+EXPORT_SYMBOL(_raw_write_unlock_irqrestore);
+#endif
+
+#ifndef CONFIG_INLINE_WRITE_UNLOCK_IRQ
+void __lockfunc _raw_write_unlock_irq(rwlock_t *lock)
+{
+        __raw_write_unlock_irq(lock);
+}
+EXPORT_SYMBOL(_raw_write_unlock_irq);
+#endif
+
+#ifndef CONFIG_INLINE_WRITE_UNLOCK_BH
+void __lockfunc _raw_write_unlock_bh(rwlock_t *lock)
+{
+        __raw_write_unlock_bh(lock);
+}
+EXPORT_SYMBOL(_raw_write_unlock_bh);
+#endif
+
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+
+void __lockfunc _raw_spin_lock_nested(raw_spinlock_t *lock, int subclass)
+{
+        preempt_disable();
+        spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
+        LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
+}
+EXPORT_SYMBOL(_raw_spin_lock_nested);
+
+unsigned long __lockfunc _raw_spin_lock_irqsave_nested(raw_spinlock_t *lock,
+                                                   int subclass)
+{
+        unsigned long flags;
+
+        local_irq_save(flags);
+        preempt_disable();
+        spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
+        LOCK_CONTENDED_FLAGS(lock, do_raw_spin_trylock, do_raw_spin_lock,
+                                do_raw_spin_lock_flags, &flags);
+        return flags;
+}
+EXPORT_SYMBOL(_raw_spin_lock_irqsave_nested);
+
+void __lockfunc _raw_spin_lock_nest_lock(raw_spinlock_t *lock,
+                                     struct lockdep_map *nest_lock)
+{
+        preempt_disable();
+        spin_acquire_nest(&lock->dep_map, 0, 0, nest_lock, _RET_IP_);
+        LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
+}
+EXPORT_SYMBOL(_raw_spin_lock_nest_lock);
+
 #endif
 
 notrace int in_lock_functions(unsigned long addr)
diff --git a/kernel/srcu.c b/kernel/srcu.c
index b0aeeaf22ce4..818d7d9aa03c 100644
--- a/kernel/srcu.c
+++ b/kernel/srcu.c
@@ -49,6 +49,7 @@ int init_srcu_struct(struct srcu_struct *sp)
         sp->per_cpu_ref = alloc_percpu(struct srcu_struct_array);
         return (sp->per_cpu_ref ? 0 : -ENOMEM);
 }
+EXPORT_SYMBOL_GPL(init_srcu_struct);
 
 /*
  * srcu_readers_active_idx -- returns approximate number of readers
@@ -97,6 +98,7 @@ void cleanup_srcu_struct(struct srcu_struct *sp)
         free_percpu(sp->per_cpu_ref);
         sp->per_cpu_ref = NULL;
 }
+EXPORT_SYMBOL_GPL(cleanup_srcu_struct);
 
 /**
  * srcu_read_lock - register a new reader for an SRCU-protected structure.
@@ -118,6 +120,7 @@ int srcu_read_lock(struct srcu_struct *sp)
         preempt_enable();
         return idx;
 }
+EXPORT_SYMBOL_GPL(srcu_read_lock);
 
 /**
  * srcu_read_unlock - unregister a old reader from an SRCU-protected structure.
@@ -136,22 +139,12 @@ void srcu_read_unlock(struct srcu_struct *sp, int idx)
         per_cpu_ptr(sp->per_cpu_ref, smp_processor_id())->c[idx]--;
         preempt_enable();
 }
+EXPORT_SYMBOL_GPL(srcu_read_unlock);
 
-/**
- * synchronize_srcu - wait for prior SRCU read-side critical-section completion
- * @sp: srcu_struct with which to synchronize.
- *
- * Flip the completed counter, and wait for the old count to drain to zero.
- * As with classic RCU, the updater must use some separate means of
- * synchronizing concurrent updates.  Can block; must be called from
- * process context.
- *
- * Note that it is illegal to call synchornize_srcu() from the corresponding
- * SRCU read-side critical section; doing so will result in deadlock.
- * However, it is perfectly legal to call synchronize_srcu() on one
- * srcu_struct from some other srcu_struct's read-side critical section.
+/*
+ * Helper function for synchronize_srcu() and synchronize_srcu_expedited().
  */
-void synchronize_srcu(struct srcu_struct *sp)
+void __synchronize_srcu(struct srcu_struct *sp, void (*sync_func)(void))
 {
         int idx;
 
@@ -173,7 +166,7 @@ void synchronize_srcu(struct srcu_struct *sp)
                 return;
         }
 
-        synchronize_sched();  /* Force memory barrier on all CPUs. */
+        sync_func();  /* Force memory barrier on all CPUs. */
 
         /*
          * The preceding synchronize_sched() ensures that any CPU that
@@ -190,7 +183,7 @@ void synchronize_srcu(struct srcu_struct *sp)
         idx = sp->completed & 0x1;
         sp->completed++;
 
-        synchronize_sched();  /* Force memory barrier on all CPUs. */
+        sync_func();  /* Force memory barrier on all CPUs. */
 
         /*
          * At this point, because of the preceding synchronize_sched(),
@@ -203,7 +196,7 @@ void synchronize_srcu(struct srcu_struct *sp)
         while (srcu_readers_active_idx(sp, idx))
                 schedule_timeout_interruptible(1);
 
-        synchronize_sched();  /* Force memory barrier on all CPUs. */
+        sync_func();  /* Force memory barrier on all CPUs. */
 
         /*
          * The preceding synchronize_sched() forces all srcu_read_unlock()
@@ -237,6 +230,47 @@ void synchronize_srcu(struct srcu_struct *sp)
 }
 
 /**
+ * synchronize_srcu - wait for prior SRCU read-side critical-section completion
+ * @sp: srcu_struct with which to synchronize.
+ *
+ * Flip the completed counter, and wait for the old count to drain to zero.
+ * As with classic RCU, the updater must use some separate means of
+ * synchronizing concurrent updates.  Can block; must be called from
+ * process context.
+ *
+ * Note that it is illegal to call synchronize_srcu() from the corresponding
+ * SRCU read-side critical section; doing so will result in deadlock.
+ * However, it is perfectly legal to call synchronize_srcu() on one
+ * srcu_struct from some other srcu_struct's read-side critical section.
+ */
+void synchronize_srcu(struct srcu_struct *sp)
+{
+        __synchronize_srcu(sp, synchronize_sched);
+}
+EXPORT_SYMBOL_GPL(synchronize_srcu);
+
+/**
+ * synchronize_srcu_expedited - like synchronize_srcu, but less patient
+ * @sp: srcu_struct with which to synchronize.
+ *
+ * Flip the completed counter, and wait for the old count to drain to zero.
+ * As with classic RCU, the updater must use some separate means of
+ * synchronizing concurrent updates.  Can block; must be called from
+ * process context.
+ *
+ * Note that it is illegal to call synchronize_srcu_expedited()
+ * from the corresponding SRCU read-side critical section; doing so
+ * will result in deadlock.  However, it is perfectly legal to call
+ * synchronize_srcu_expedited() on one srcu_struct from some other
+ * srcu_struct's read-side critical section.
+ */
+void synchronize_srcu_expedited(struct srcu_struct *sp)
+{
+        __synchronize_srcu(sp, synchronize_sched_expedited);
+}
+EXPORT_SYMBOL_GPL(synchronize_srcu_expedited);
+
+/**
  * srcu_batches_completed - return batches completed.
  * @sp: srcu_struct on which to report batch completion.
  *
@@ -248,10 +282,4 @@ long srcu_batches_completed(struct srcu_struct *sp)
 {
         return sp->completed;
 }
-
-EXPORT_SYMBOL_GPL(init_srcu_struct);
-EXPORT_SYMBOL_GPL(cleanup_srcu_struct);
-EXPORT_SYMBOL_GPL(srcu_read_lock);
-EXPORT_SYMBOL_GPL(srcu_read_unlock);
-EXPORT_SYMBOL_GPL(synchronize_srcu);
 EXPORT_SYMBOL_GPL(srcu_batches_completed);
diff --git a/kernel/sys.c b/kernel/sys.c
index ce17760d9c51..20ccfb5da6af 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -8,7 +8,6 @@
 #include <linux/mm.h>
 #include <linux/utsname.h>
 #include <linux/mman.h>
-#include <linux/smp_lock.h>
 #include <linux/notifier.h>
 #include <linux/reboot.h>
 #include <linux/prctl.h>
@@ -190,10 +189,10 @@ SYSCALL_DEFINE3(setpriority, int, which, int, who, int, niceval)
                                  !(user = find_user(who)))
                                 goto out_unlock;        /* No processes for this user */
 
-                        do_each_thread(g, p)
+                        do_each_thread(g, p) {
                                 if (__task_cred(p)->uid == who)
                                         error = set_one_prio(p, niceval, error);
-                        while_each_thread(g, p);
+                        } while_each_thread(g, p);
                         if (who != cred->uid)
                                 free_uid(user);         /* For find_user() */
                         break;
@@ -253,13 +252,13 @@ SYSCALL_DEFINE2(getpriority, int, which, int, who)
                                  !(user = find_user(who)))
                                 goto out_unlock;        /* No processes for this user */
 
-                        do_each_thread(g, p)
+                        do_each_thread(g, p) {
                                 if (__task_cred(p)->uid == who) {
                                         niceval = 20 - task_nice(p);
                                         if (niceval > retval)
                                                 retval = niceval;
                                 }
-                        while_each_thread(g, p);
+                        } while_each_thread(g, p);
                         if (who != cred->uid)
                                 free_uid(user);         /* for find_user() */
                         break;
@@ -349,6 +348,9 @@ void kernel_power_off(void)
         machine_power_off();
 }
 EXPORT_SYMBOL_GPL(kernel_power_off);
+
+static DEFINE_MUTEX(reboot_mutex);
+
 /*
  * Reboot system call: for obvious reasons only root may call it,
  * and even root needs to set up some magic numbers in the registers
@@ -381,7 +383,7 @@ SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd,
         if ((cmd == LINUX_REBOOT_CMD_POWER_OFF) && !pm_power_off)
                 cmd = LINUX_REBOOT_CMD_HALT;
 
-        lock_kernel();
+        mutex_lock(&reboot_mutex);
         switch (cmd) {
         case LINUX_REBOOT_CMD_RESTART:
                 kernel_restart(NULL);
@@ -397,20 +399,18 @@ SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd,
 
         case LINUX_REBOOT_CMD_HALT:
                 kernel_halt();
-                unlock_kernel();
                 do_exit(0);
                 panic("cannot halt");
 
         case LINUX_REBOOT_CMD_POWER_OFF:
                 kernel_power_off();
-                unlock_kernel();
                 do_exit(0);
                 break;
 
         case LINUX_REBOOT_CMD_RESTART2:
                 if (strncpy_from_user(&buffer[0], arg, sizeof(buffer) - 1) < 0) {
-                        unlock_kernel();
-                        return -EFAULT;
+                        ret = -EFAULT;
+                        break;
                 }
                 buffer[sizeof(buffer) - 1] = '\0';
 
@@ -433,7 +433,7 @@ SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd,
                 ret = -EINVAL;
                 break;
         }
-        unlock_kernel();
+        mutex_unlock(&reboot_mutex);
         return ret;
 }
 
@@ -911,16 +911,15 @@ change_okay:
 
 void do_sys_times(struct tms *tms)
 {
-        struct task_cputime cputime;
-        cputime_t cutime, cstime;
+        cputime_t tgutime, tgstime, cutime, cstime;
 
-        thread_group_cputime(current, &cputime);
         spin_lock_irq(&current->sighand->siglock);
+        thread_group_times(current, &tgutime, &tgstime);
         cutime = current->signal->cutime;
         cstime = current->signal->cstime;
         spin_unlock_irq(&current->sighand->siglock);
-        tms->tms_utime = cputime_to_clock_t(cputime.utime);
-        tms->tms_stime = cputime_to_clock_t(cputime.stime);
+        tms->tms_utime = cputime_to_clock_t(tgutime);
+        tms->tms_stime = cputime_to_clock_t(tgstime);
         tms->tms_cutime = cputime_to_clock_t(cutime);
         tms->tms_cstime = cputime_to_clock_t(cstime);
 }
@@ -1338,16 +1337,14 @@ static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
 {
         struct task_struct *t;
         unsigned long flags;
-        cputime_t utime, stime;
-        struct task_cputime cputime;
+        cputime_t tgutime, tgstime, utime, stime;
         unsigned long maxrss = 0;
 
         memset((char *) r, 0, sizeof *r);
         utime = stime = cputime_zero;
 
         if (who == RUSAGE_THREAD) {
-                utime = task_utime(current);
-                stime = task_stime(current);
+                task_times(current, &utime, &stime);
                 accumulate_thread_rusage(p, r);
                 maxrss = p->signal->maxrss;
                 goto out;
@@ -1373,9 +1370,9 @@ static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
                                 break;
 
                 case RUSAGE_SELF:
-                        thread_group_cputime(p, &cputime);
-                        utime = cputime_add(utime, cputime.utime);
-                        stime = cputime_add(stime, cputime.stime);
+                        thread_group_times(p, &tgutime, &tgstime);
+                        utime = cputime_add(utime, tgutime);
+                        stime = cputime_add(stime, tgstime);
                         r->ru_nvcsw += p->signal->nvcsw;
                         r->ru_nivcsw += p->signal->nivcsw;
                         r->ru_minflt += p->signal->min_flt;
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index e06d0b8d1951..695384f12a7d 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -48,8 +48,10 @@ cond_syscall(sys_shutdown);
 cond_syscall(sys_sendmsg);
 cond_syscall(compat_sys_sendmsg);
 cond_syscall(sys_recvmsg);
+cond_syscall(sys_recvmmsg);
 cond_syscall(compat_sys_recvmsg);
 cond_syscall(compat_sys_recvfrom);
+cond_syscall(compat_sys_recvmmsg);
 cond_syscall(sys_socketcall);
 cond_syscall(sys_futex);
 cond_syscall(compat_sys_futex);
@@ -139,7 +141,6 @@ cond_syscall(sys_pciconfig_read);
 cond_syscall(sys_pciconfig_write);
 cond_syscall(sys_pciconfig_iobase);
 cond_syscall(sys32_ipc);
-cond_syscall(sys32_sysctl);
 cond_syscall(ppc_rtas);
 cond_syscall(sys_spu_run);
 cond_syscall(sys_spu_create);
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 0d949c517412..45e4bef0012a 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -27,7 +27,6 @@
 #include <linux/security.h>
 #include <linux/ctype.h>
 #include <linux/kmemcheck.h>
-#include <linux/smp_lock.h>
 #include <linux/fs.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
@@ -36,6 +35,7 @@
 #include <linux/sysrq.h>
 #include <linux/highuid.h>
 #include <linux/writeback.h>
+#include <linux/ratelimit.h>
 #include <linux/hugetlb.h>
 #include <linux/initrd.h>
 #include <linux/key.h>
@@ -60,7 +60,6 @@
 #include <asm/io.h>
 #endif
 
-static int deprecated_sysctl_warning(struct __sysctl_args *args);
 
 #if defined(CONFIG_SYSCTL)
 
@@ -158,6 +157,8 @@ extern int no_unaligned_warning;
 extern int unaligned_dump_stack;
 #endif
 
+extern struct ratelimit_state printk_ratelimit_state;
+
 #ifdef CONFIG_RT_MUTEXES
 extern int max_lock_depth;
 #endif
@@ -207,31 +208,26 @@ extern int lock_stat;
 
 static struct ctl_table root_table[] = {
         {
-                .ctl_name       = CTL_KERN,
                 .procname       = "kernel",
                 .mode           = 0555,
                 .child          = kern_table,
         },
         {
-                .ctl_name       = CTL_VM,
                 .procname       = "vm",
                 .mode           = 0555,
                 .child          = vm_table,
         },
         {
-                .ctl_name       = CTL_FS,
                 .procname       = "fs",
                 .mode           = 0555,
                 .child          = fs_table,
         },
         {
-                .ctl_name       = CTL_DEBUG,
                 .procname       = "debug",
                 .mode           = 0555,
                 .child          = debug_table,
         },
         {
-                .ctl_name       = CTL_DEV,
                 .procname       = "dev",
                 .mode           = 0555,
                 .child          = dev_table,
@@ -240,7 +236,7 @@ static struct ctl_table root_table[] = {
  * NOTE: do not add new entries to this table unless you have read
  * Documentation/sysctl/ctl_unnumbered.txt
  */
-        { .ctl_name = 0 }
+        { }
 };
 
 #ifdef CONFIG_SCHED_DEBUG
@@ -248,196 +244,178 @@ static int min_sched_granularity_ns = 100000;		/* 100 usecs */
 static int max_sched_granularity_ns = NSEC_PER_SEC;     /* 1 second */
 static int min_wakeup_granularity_ns;                   /* 0 usecs */
 static int max_wakeup_granularity_ns = NSEC_PER_SEC;    /* 1 second */
+static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE;
+static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1;
+static int min_sched_shares_ratelimit = 100000; /* 100 usec */
+static int max_sched_shares_ratelimit = NSEC_PER_SEC; /* 1 second */
 #endif
 
 static struct ctl_table kern_table[] = {
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "sched_child_runs_first",
                 .data           = &sysctl_sched_child_runs_first,
                 .maxlen         = sizeof(unsigned int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #ifdef CONFIG_SCHED_DEBUG
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "sched_min_granularity_ns",
                 .data           = &sysctl_sched_min_granularity,
                 .maxlen         = sizeof(unsigned int),
                 .mode           = 0644,
-                .proc_handler   = &sched_nr_latency_handler,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = sched_proc_update_handler,
                 .extra1         = &min_sched_granularity_ns,
                 .extra2         = &max_sched_granularity_ns,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "sched_latency_ns",
                 .data           = &sysctl_sched_latency,
                 .maxlen         = sizeof(unsigned int),
                 .mode           = 0644,
-                .proc_handler   = &sched_nr_latency_handler,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = sched_proc_update_handler,
                 .extra1         = &min_sched_granularity_ns,
                 .extra2         = &max_sched_granularity_ns,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "sched_wakeup_granularity_ns",
                 .data           = &sysctl_sched_wakeup_granularity,
                 .maxlen         = sizeof(unsigned int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = sched_proc_update_handler,
                 .extra1         = &min_wakeup_granularity_ns,
                 .extra2         = &max_wakeup_granularity_ns,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "sched_shares_ratelimit",
                 .data           = &sysctl_sched_shares_ratelimit,
                 .maxlen         = sizeof(unsigned int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = sched_proc_update_handler,
+                .extra1         = &min_sched_shares_ratelimit,
+                .extra2         = &max_sched_shares_ratelimit,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
-                .procname       = "sched_shares_thresh",
-                .data           = &sysctl_sched_shares_thresh,
-                .maxlen         = sizeof(unsigned int),
+                .procname       = "sched_tunable_scaling",
+                .data           = &sysctl_sched_tunable_scaling,
+                .maxlen         = sizeof(enum sched_tunable_scaling),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = &sysctl_intvec,
-                .extra1         = &zero,
+                .proc_handler   = sched_proc_update_handler,
+                .extra1         = &min_sched_tunable_scaling,
+                .extra2         = &max_sched_tunable_scaling,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
-                .procname       = "sched_features",
-                .data           = &sysctl_sched_features,
+                .procname       = "sched_shares_thresh",
+                .data           = &sysctl_sched_shares_thresh,
                 .maxlen         = sizeof(unsigned int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec_minmax,
+                .extra1         = &zero,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "sched_migration_cost",
                 .data           = &sysctl_sched_migration_cost,
                 .maxlen         = sizeof(unsigned int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "sched_nr_migrate",
                 .data           = &sysctl_sched_nr_migrate,
                 .maxlen         = sizeof(unsigned int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "sched_time_avg",
                 .data           = &sysctl_sched_time_avg,
                 .maxlen         = sizeof(unsigned int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "timer_migration",
                 .data           = &sysctl_timer_migration,
                 .maxlen         = sizeof(unsigned int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &zero,
                 .extra2         = &one,
         },
 #endif
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "sched_rt_period_us",
                 .data           = &sysctl_sched_rt_period,
                 .maxlen         = sizeof(unsigned int),
                 .mode           = 0644,
-                .proc_handler   = &sched_rt_handler,
+                .proc_handler   = sched_rt_handler,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "sched_rt_runtime_us",
                 .data           = &sysctl_sched_rt_runtime,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &sched_rt_handler,
+                .proc_handler   = sched_rt_handler,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "sched_compat_yield",
                 .data           = &sysctl_sched_compat_yield,
                 .maxlen         = sizeof(unsigned int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #ifdef CONFIG_PROVE_LOCKING
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "prove_locking",
                 .data           = &prove_locking,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #ifdef CONFIG_LOCK_STAT
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "lock_stat",
                 .data           = &lock_stat,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
         {
-                .ctl_name       = KERN_PANIC,
                 .procname       = "panic",
                 .data           = &panic_timeout,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = KERN_CORE_USES_PID,
                 .procname       = "core_uses_pid",
                 .data           = &core_uses_pid,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = KERN_CORE_PATTERN,
                 .procname       = "core_pattern",
                 .data           = core_pattern,
                 .maxlen         = CORENAME_MAX_SIZE,
                 .mode           = 0644,
-                .proc_handler   = &proc_dostring,
-                .strategy       = &sysctl_string,
+                .proc_handler   = proc_dostring,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "core_pipe_limit",
                 .data           = &core_pipe_limit,
                 .maxlen         = sizeof(unsigned int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #ifdef CONFIG_PROC_SYSCTL
         {
                 .procname       = "tainted",
                 .maxlen         = sizeof(long),
                 .mode           = 0644,
-                .proc_handler   = &proc_taint,
+                .proc_handler   = proc_taint,
         },
 #endif
 #ifdef CONFIG_LATENCYTOP
@@ -446,181 +424,160 @@ static struct ctl_table kern_table[] = {
                 .data           = &latencytop_enabled,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #ifdef CONFIG_BLK_DEV_INITRD
         {
-                .ctl_name       = KERN_REALROOTDEV,
                 .procname       = "real-root-dev",
                 .data           = &real_root_dev,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "print-fatal-signals",
                 .data           = &print_fatal_signals,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #ifdef CONFIG_SPARC
         {
-                .ctl_name       = KERN_SPARC_REBOOT,
                 .procname       = "reboot-cmd",
                 .data           = reboot_command,
                 .maxlen         = 256,
                 .mode           = 0644,
-                .proc_handler   = &proc_dostring,
-                .strategy       = &sysctl_string,
+                .proc_handler   = proc_dostring,
         },
         {
-                .ctl_name       = KERN_SPARC_STOP_A,
                 .procname       = "stop-a",
                 .data           = &stop_a_enabled,
                 .maxlen         = sizeof (int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = KERN_SPARC_SCONS_PWROFF,
                 .procname       = "scons-poweroff",
                 .data           = &scons_pwroff,
                 .maxlen         = sizeof (int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #ifdef CONFIG_SPARC64
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "tsb-ratio",
                 .data           = &sysctl_tsb_ratio,
                 .maxlen         = sizeof (int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #ifdef __hppa__
         {
-                .ctl_name       = KERN_HPPA_PWRSW,
                 .procname       = "soft-power",
                 .data           = &pwrsw_enabled,
                 .maxlen         = sizeof (int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = KERN_HPPA_UNALIGNED,
                 .procname       = "unaligned-trap",
                 .data           = &unaligned_enabled,
                 .maxlen         = sizeof (int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
         {
-                .ctl_name       = KERN_CTLALTDEL,
                 .procname       = "ctrl-alt-del",
                 .data           = &C_A_D,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #ifdef CONFIG_FUNCTION_TRACER
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "ftrace_enabled",
                 .data           = &ftrace_enabled,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &ftrace_enable_sysctl,
+                .proc_handler   = ftrace_enable_sysctl,
         },
 #endif
 #ifdef CONFIG_STACK_TRACER
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "stack_tracer_enabled",
                 .data           = &stack_tracer_enabled,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &stack_trace_sysctl,
+                .proc_handler   = stack_trace_sysctl,
         },
 #endif
 #ifdef CONFIG_TRACING
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "ftrace_dump_on_oops",
                 .data           = &ftrace_dump_on_oops,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #ifdef CONFIG_MODULES
         {
-                .ctl_name       = KERN_MODPROBE,
                 .procname       = "modprobe",
                 .data           = &modprobe_path,
                 .maxlen         = KMOD_PATH_LEN,
                 .mode           = 0644,
-                .proc_handler   = &proc_dostring,
-                .strategy       = &sysctl_string,
+                .proc_handler   = proc_dostring,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "modules_disabled",
                 .data           = &modules_disabled,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
                 /* only handle a transition from default "0" to "1" */
-                .proc_handler   = &proc_dointvec_minmax,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &one,
                 .extra2         = &one,
         },
 #endif
 #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
         {
-                .ctl_name       = KERN_HOTPLUG,
                 .procname       = "hotplug",
                 .data           = &uevent_helper,
                 .maxlen         = UEVENT_HELPER_PATH_LEN,
                 .mode           = 0644,
-                .proc_handler   = &proc_dostring,
-                .strategy       = &sysctl_string,
+                .proc_handler   = proc_dostring,
         },
 #endif
 #ifdef CONFIG_CHR_DEV_SG
         {
-                .ctl_name       = KERN_SG_BIG_BUFF,
                 .procname       = "sg-big-buff",
                 .data           = &sg_big_buff,
                 .maxlen         = sizeof (int),
                 .mode           = 0444,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #ifdef CONFIG_BSD_PROCESS_ACCT
         {
-                .ctl_name       = KERN_ACCT,
                 .procname       = "acct",
                 .data           = &acct_parm,
                 .maxlen         = 3*sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #ifdef CONFIG_MAGIC_SYSRQ
         {
-                .ctl_name       = KERN_SYSRQ,
                 .procname       = "sysrq",
                 .data           = &__sysrq_enabled,
                 .maxlen         = sizeof (int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #ifdef CONFIG_PROC_SYSCTL
@@ -629,215 +586,188 @@ static struct ctl_table kern_table[] = {
                 .data           = NULL,
                 .maxlen         = sizeof (int),
                 .mode           = 0600,
-                .proc_handler   = &proc_do_cad_pid,
+                .proc_handler   = proc_do_cad_pid,
         },
 #endif
         {
-                .ctl_name       = KERN_MAX_THREADS,
                 .procname       = "threads-max",
                 .data           = &max_threads,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = KERN_RANDOM,
                 .procname       = "random",
                 .mode           = 0555,
                 .child          = random_table,
         },
         {
-                .ctl_name       = KERN_OVERFLOWUID,
                 .procname       = "overflowuid",
                 .data           = &overflowuid,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &minolduid,
                 .extra2         = &maxolduid,
         },
         {
-                .ctl_name       = KERN_OVERFLOWGID,
                 .procname       = "overflowgid",
                 .data           = &overflowgid,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &minolduid,
                 .extra2         = &maxolduid,
         },
 #ifdef CONFIG_S390
 #ifdef CONFIG_MATHEMU
         {
-                .ctl_name       = KERN_IEEE_EMULATION_WARNINGS,
                 .procname       = "ieee_emulation_warnings",
                 .data           = &sysctl_ieee_emulation_warnings,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
         {
-                .ctl_name       = KERN_S390_USER_DEBUG_LOGGING,
                 .procname       = "userprocess_debug",
                 .data           = &sysctl_userprocess_debug,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
         {
-                .ctl_name       = KERN_PIDMAX,
                 .procname       = "pid_max",
                 .data           = &pid_max,
                 .maxlen         = sizeof (int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = sysctl_intvec,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &pid_max_min,
                 .extra2         = &pid_max_max,
         },
         {
-                .ctl_name       = KERN_PANIC_ON_OOPS,
                 .procname       = "panic_on_oops",
                 .data           = &panic_on_oops,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #if defined CONFIG_PRINTK
         {
-                .ctl_name       = KERN_PRINTK,
                 .procname       = "printk",
                 .data           = &console_loglevel,
                 .maxlen         = 4*sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = KERN_PRINTK_RATELIMIT,
                 .procname       = "printk_ratelimit",
                 .data           = &printk_ratelimit_state.interval,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_jiffies,
-                .strategy       = &sysctl_jiffies,
+                .proc_handler   = proc_dointvec_jiffies,
         },
         {
-                .ctl_name       = KERN_PRINTK_RATELIMIT_BURST,
                 .procname       = "printk_ratelimit_burst",
                 .data           = &printk_ratelimit_state.burst,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "printk_delay",
                 .data           = &printk_delay_msec,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &zero,
                 .extra2         = &ten_thousand,
         },
 #endif
         {
-                .ctl_name       = KERN_NGROUPS_MAX,
                 .procname       = "ngroups_max",
                 .data           = &ngroups_max,
                 .maxlen         = sizeof (int),
                 .mode           = 0444,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
         {
-                .ctl_name       = KERN_UNKNOWN_NMI_PANIC,
                 .procname       = "unknown_nmi_panic",
                 .data           = &unknown_nmi_panic,
                 .maxlen         = sizeof (int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
                 .procname       = "nmi_watchdog",
                 .data           = &nmi_watchdog_enabled,
                 .maxlen         = sizeof (int),
                 .mode           = 0644,
-                .proc_handler   = &proc_nmi_enabled,
+                .proc_handler   = proc_nmi_enabled,
         },
 #endif
 #if defined(CONFIG_X86)
         {
-                .ctl_name       = KERN_PANIC_ON_NMI,
                 .procname       = "panic_on_unrecovered_nmi",
                 .data           = &panic_on_unrecovered_nmi,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "panic_on_io_nmi",
                 .data           = &panic_on_io_nmi,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = KERN_BOOTLOADER_TYPE,
                 .procname       = "bootloader_type",
                 .data           = &bootloader_type,
                 .maxlen         = sizeof (int),
                 .mode           = 0444,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "bootloader_version",
                 .data           = &bootloader_version,
                 .maxlen         = sizeof (int),
                 .mode           = 0444,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "kstack_depth_to_print",
                 .data           = &kstack_depth_to_print,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "io_delay_type",
                 .data           = &io_delay_type,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #if defined(CONFIG_MMU)
         {
-                .ctl_name       = KERN_RANDOMIZE,
                 .procname       = "randomize_va_space",
                 .data           = &randomize_va_space,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #if defined(CONFIG_S390) && defined(CONFIG_SMP)
         {
-                .ctl_name       = KERN_SPIN_RETRY,
                 .procname       = "spin_retry",
                 .data           = &spin_retry,
                 .maxlen         = sizeof (int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #if     defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)
@@ -846,123 +776,104 @@ static struct ctl_table kern_table[] = {
                 .data           = &acpi_realmode_flags,
                 .maxlen         = sizeof (unsigned long),
                 .mode           = 0644,
-                .proc_handler   = &proc_doulongvec_minmax,
+                .proc_handler   = proc_doulongvec_minmax,
         },
 #endif
 #ifdef CONFIG_IA64
         {
-                .ctl_name       = KERN_IA64_UNALIGNED,
                 .procname       = "ignore-unaligned-usertrap",
                 .data           = &no_unaligned_warning,
                 .maxlen         = sizeof (int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "unaligned-dump-stack",
                 .data           = &unaligned_dump_stack,
                 .maxlen         = sizeof (int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #ifdef CONFIG_DETECT_SOFTLOCKUP
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "softlockup_panic",
                 .data           = &softlockup_panic,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &zero,
                 .extra2         = &one,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "softlockup_thresh",
                 .data           = &softlockup_thresh,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dosoftlockup_thresh,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dosoftlockup_thresh,
                 .extra1         = &neg_one,
                 .extra2         = &sixty,
         },
 #endif
 #ifdef CONFIG_DETECT_HUNG_TASK
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "hung_task_panic",
                 .data           = &sysctl_hung_task_panic,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &zero,
                 .extra2         = &one,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "hung_task_check_count",
                 .data           = &sysctl_hung_task_check_count,
                 .maxlen         = sizeof(unsigned long),
                 .mode           = 0644,
-                .proc_handler   = &proc_doulongvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_doulongvec_minmax,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "hung_task_timeout_secs",
                 .data           = &sysctl_hung_task_timeout_secs,
                 .maxlen         = sizeof(unsigned long),
                 .mode           = 0644,
-                .proc_handler   = &proc_dohung_task_timeout_secs,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dohung_task_timeout_secs,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "hung_task_warnings",
                 .data           = &sysctl_hung_task_warnings,
                 .maxlen         = sizeof(unsigned long),
                 .mode           = 0644,
-                .proc_handler   = &proc_doulongvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_doulongvec_minmax,
         },
 #endif
 #ifdef CONFIG_COMPAT
         {
-                .ctl_name       = KERN_COMPAT_LOG,
                 .procname       = "compat-log",
                 .data           = &compat_log,
                 .maxlen         = sizeof (int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #ifdef CONFIG_RT_MUTEXES
         {
-                .ctl_name       = KERN_MAX_LOCK_DEPTH,
                 .procname       = "max_lock_depth",
                 .data           = &max_lock_depth,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "poweroff_cmd",
                 .data           = &poweroff_cmd,
                 .maxlen         = POWEROFF_CMD_PATH_LEN,
                 .mode           = 0644,
-                .proc_handler   = &proc_dostring,
-                .strategy       = &sysctl_string,
+                .proc_handler   = proc_dostring,
         },
 #ifdef CONFIG_KEYS
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "keys",
                 .mode           = 0555,
                 .child          = key_sysctls,
@@ -970,17 +881,15 @@ static struct ctl_table kern_table[] = {
 #endif
 #ifdef CONFIG_RCU_TORTURE_TEST
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "rcutorture_runnable",
                 .data           = &rcutorture_runnable,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #ifdef CONFIG_SLOW_WORK
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "slow-work",
                 .mode           = 0555,
                 .child          = slow_work_sysctls,
@@ -988,146 +897,127 @@ static struct ctl_table kern_table[] = {
 #endif
 #ifdef CONFIG_PERF_EVENTS
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "perf_event_paranoid",
                 .data           = &sysctl_perf_event_paranoid,
                 .maxlen         = sizeof(sysctl_perf_event_paranoid),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "perf_event_mlock_kb",
                 .data           = &sysctl_perf_event_mlock,
                 .maxlen         = sizeof(sysctl_perf_event_mlock),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "perf_event_max_sample_rate",
                 .data           = &sysctl_perf_event_sample_rate,
                 .maxlen         = sizeof(sysctl_perf_event_sample_rate),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #ifdef CONFIG_KMEMCHECK
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "kmemcheck",
                 .data           = &kmemcheck_enabled,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #ifdef CONFIG_BLOCK
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "blk_iopoll",
                 .data           = &blk_iopoll_enabled,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 /*
  * NOTE: do not add new entries to this table unless you have read
  * Documentation/sysctl/ctl_unnumbered.txt
  */
-        { .ctl_name = 0 }
+        { }
 };
 
 static struct ctl_table vm_table[] = {
         {
-                .ctl_name       = VM_OVERCOMMIT_MEMORY,
                 .procname       = "overcommit_memory",
                 .data           = &sysctl_overcommit_memory,
                 .maxlen         = sizeof(sysctl_overcommit_memory),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = VM_PANIC_ON_OOM,
                 .procname       = "panic_on_oom",
                 .data           = &sysctl_panic_on_oom,
                 .maxlen         = sizeof(sysctl_panic_on_oom),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "oom_kill_allocating_task",
                 .data           = &sysctl_oom_kill_allocating_task,
                 .maxlen         = sizeof(sysctl_oom_kill_allocating_task),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "oom_dump_tasks",
                 .data           = &sysctl_oom_dump_tasks,
                 .maxlen         = sizeof(sysctl_oom_dump_tasks),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = VM_OVERCOMMIT_RATIO,
                 .procname       = "overcommit_ratio",
                 .data           = &sysctl_overcommit_ratio,
                 .maxlen         = sizeof(sysctl_overcommit_ratio),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = VM_PAGE_CLUSTER,
                 .procname       = "page-cluster", 
                 .data           = &page_cluster,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = VM_DIRTY_BACKGROUND,
                 .procname       = "dirty_background_ratio",
                 .data           = &dirty_background_ratio,
                 .maxlen         = sizeof(dirty_background_ratio),
                 .mode           = 0644,
-                .proc_handler   = &dirty_background_ratio_handler,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = dirty_background_ratio_handler,
                 .extra1         = &zero,
                 .extra2         = &one_hundred,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "dirty_background_bytes",
                 .data           = &dirty_background_bytes,
                 .maxlen         = sizeof(dirty_background_bytes),
                 .mode           = 0644,
-                .proc_handler   = &dirty_background_bytes_handler,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = dirty_background_bytes_handler,
                 .extra1         = &one_ul,
         },
         {
-                .ctl_name       = VM_DIRTY_RATIO,
                 .procname       = "dirty_ratio",
                 .data           = &vm_dirty_ratio,
                 .maxlen         = sizeof(vm_dirty_ratio),
                 .mode           = 0644,
-                .proc_handler   = &dirty_ratio_handler,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = dirty_ratio_handler,
                 .extra1         = &zero,
                 .extra2         = &one_hundred,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "dirty_bytes",
                 .data           = &vm_dirty_bytes,
                 .maxlen         = sizeof(vm_dirty_bytes),
                 .mode           = 0644,
-                .proc_handler   = &dirty_bytes_handler,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = dirty_bytes_handler,
                 .extra1         = &dirty_bytes_min,
         },
         {
@@ -1135,289 +1025,256 @@ static struct ctl_table vm_table[] = {
                 .data           = &dirty_writeback_interval,
                 .maxlen         = sizeof(dirty_writeback_interval),
                 .mode           = 0644,
-                .proc_handler   = &dirty_writeback_centisecs_handler,
+                .proc_handler   = dirty_writeback_centisecs_handler,
         },
         {
                 .procname       = "dirty_expire_centisecs",
                 .data           = &dirty_expire_interval,
                 .maxlen         = sizeof(dirty_expire_interval),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = VM_NR_PDFLUSH_THREADS,
                 .procname       = "nr_pdflush_threads",
                 .data           = &nr_pdflush_threads,
                 .maxlen         = sizeof nr_pdflush_threads,
                 .mode           = 0444 /* read-only*/,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = VM_SWAPPINESS,
                 .procname       = "swappiness",
                 .data           = &vm_swappiness,
                 .maxlen         = sizeof(vm_swappiness),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &zero,
                 .extra2         = &one_hundred,
         },
 #ifdef CONFIG_HUGETLB_PAGE
-         {
+        {
                 .procname       = "nr_hugepages",
                 .data           = NULL,
                 .maxlen         = sizeof(unsigned long),
                 .mode           = 0644,
-                .proc_handler   = &hugetlb_sysctl_handler,
+                .proc_handler   = hugetlb_sysctl_handler,
                 .extra1         = (void *)&hugetlb_zero,
                 .extra2         = (void *)&hugetlb_infinity,
-         },
+        },
+#ifdef CONFIG_NUMA
+        {
+                .procname       = "nr_hugepages_mempolicy",
+                .data           = NULL,
+                .maxlen         = sizeof(unsigned long),
+                .mode           = 0644,
+                .proc_handler   = &hugetlb_mempolicy_sysctl_handler,
+                .extra1         = (void *)&hugetlb_zero,
+                .extra2         = (void *)&hugetlb_infinity,
+        },
+#endif
          {
-                .ctl_name       = VM_HUGETLB_GROUP,
                 .procname       = "hugetlb_shm_group",
                 .data           = &sysctl_hugetlb_shm_group,
                 .maxlen         = sizeof(gid_t),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
          },
          {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "hugepages_treat_as_movable",
                 .data           = &hugepages_treat_as_movable,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &hugetlb_treat_movable_handler,
+                .proc_handler   = hugetlb_treat_movable_handler,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "nr_overcommit_hugepages",
                 .data           = NULL,
                 .maxlen         = sizeof(unsigned long),
                 .mode           = 0644,
-                .proc_handler   = &hugetlb_overcommit_handler,
+                .proc_handler   = hugetlb_overcommit_handler,
                 .extra1         = (void *)&hugetlb_zero,
                 .extra2         = (void *)&hugetlb_infinity,
         },
 #endif
         {
-                .ctl_name       = VM_LOWMEM_RESERVE_RATIO,
                 .procname       = "lowmem_reserve_ratio",
                 .data           = &sysctl_lowmem_reserve_ratio,
                 .maxlen         = sizeof(sysctl_lowmem_reserve_ratio),
                 .mode           = 0644,
-                .proc_handler   = &lowmem_reserve_ratio_sysctl_handler,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = lowmem_reserve_ratio_sysctl_handler,
         },
         {
-                .ctl_name       = VM_DROP_PAGECACHE,
                 .procname       = "drop_caches",
                 .data           = &sysctl_drop_caches,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
                 .proc_handler   = drop_caches_sysctl_handler,
-                .strategy       = &sysctl_intvec,
         },
         {
-                .ctl_name       = VM_MIN_FREE_KBYTES,
                 .procname       = "min_free_kbytes",
                 .data           = &min_free_kbytes,
                 .maxlen         = sizeof(min_free_kbytes),
                 .mode           = 0644,
-                .proc_handler   = &min_free_kbytes_sysctl_handler,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = min_free_kbytes_sysctl_handler,
                 .extra1         = &zero,
         },
         {
-                .ctl_name       = VM_PERCPU_PAGELIST_FRACTION,
                 .procname       = "percpu_pagelist_fraction",
                 .data           = &percpu_pagelist_fraction,
                 .maxlen         = sizeof(percpu_pagelist_fraction),
                 .mode           = 0644,
-                .proc_handler   = &percpu_pagelist_fraction_sysctl_handler,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = percpu_pagelist_fraction_sysctl_handler,
                 .extra1         = &min_percpu_pagelist_fract,
         },
 #ifdef CONFIG_MMU
         {
-                .ctl_name       = VM_MAX_MAP_COUNT,
                 .procname       = "max_map_count",
                 .data           = &sysctl_max_map_count,
                 .maxlen         = sizeof(sysctl_max_map_count),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec
+                .proc_handler   = proc_dointvec,
+                .extra1         = &zero,
         },
 #else
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "nr_trim_pages",
                 .data           = &sysctl_nr_trim_pages,
                 .maxlen         = sizeof(sysctl_nr_trim_pages),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &zero,
         },
 #endif
         {
-                .ctl_name       = VM_LAPTOP_MODE,
                 .procname       = "laptop_mode",
                 .data           = &laptop_mode,
                 .maxlen         = sizeof(laptop_mode),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_jiffies,
-                .strategy       = &sysctl_jiffies,
+                .proc_handler   = proc_dointvec_jiffies,
         },
         {
-                .ctl_name       = VM_BLOCK_DUMP,
                 .procname       = "block_dump",
                 .data           = &block_dump,
                 .maxlen         = sizeof(block_dump),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec,
                 .extra1         = &zero,
         },
         {
-                .ctl_name       = VM_VFS_CACHE_PRESSURE,
                 .procname       = "vfs_cache_pressure",
                 .data           = &sysctl_vfs_cache_pressure,
                 .maxlen         = sizeof(sysctl_vfs_cache_pressure),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec,
                 .extra1         = &zero,
         },
 #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
         {
-                .ctl_name       = VM_LEGACY_VA_LAYOUT,
                 .procname       = "legacy_va_layout",
                 .data           = &sysctl_legacy_va_layout,
                 .maxlen         = sizeof(sysctl_legacy_va_layout),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec,
                 .extra1         = &zero,
         },
 #endif
 #ifdef CONFIG_NUMA
         {
-                .ctl_name       = VM_ZONE_RECLAIM_MODE,
                 .procname       = "zone_reclaim_mode",
                 .data           = &zone_reclaim_mode,
                 .maxlen         = sizeof(zone_reclaim_mode),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec,
                 .extra1         = &zero,
         },
         {
-                .ctl_name       = VM_MIN_UNMAPPED,
                 .procname       = "min_unmapped_ratio",
                 .data           = &sysctl_min_unmapped_ratio,
                 .maxlen         = sizeof(sysctl_min_unmapped_ratio),
                 .mode           = 0644,
-                .proc_handler   = &sysctl_min_unmapped_ratio_sysctl_handler,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = sysctl_min_unmapped_ratio_sysctl_handler,
                 .extra1         = &zero,
                 .extra2         = &one_hundred,
         },
         {
-                .ctl_name       = VM_MIN_SLAB,
                 .procname       = "min_slab_ratio",
                 .data           = &sysctl_min_slab_ratio,
                 .maxlen         = sizeof(sysctl_min_slab_ratio),
                 .mode           = 0644,
-                .proc_handler   = &sysctl_min_slab_ratio_sysctl_handler,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = sysctl_min_slab_ratio_sysctl_handler,
                 .extra1         = &zero,
                 .extra2         = &one_hundred,
         },
 #endif
 #ifdef CONFIG_SMP
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "stat_interval",
                 .data           = &sysctl_stat_interval,
                 .maxlen         = sizeof(sysctl_stat_interval),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_jiffies,
-                .strategy       = &sysctl_jiffies,
+                .proc_handler   = proc_dointvec_jiffies,
         },
 #endif
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "mmap_min_addr",
                 .data           = &dac_mmap_min_addr,
                 .maxlen         = sizeof(unsigned long),
                 .mode           = 0644,
-                .proc_handler   = &mmap_min_addr_handler,
+                .proc_handler   = mmap_min_addr_handler,
         },
 #ifdef CONFIG_NUMA
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "numa_zonelist_order",
                 .data           = &numa_zonelist_order,
                 .maxlen         = NUMA_ZONELIST_ORDER_LEN,
                 .mode           = 0644,
-                .proc_handler   = &numa_zonelist_order_handler,
-                .strategy       = &sysctl_string,
+                .proc_handler   = numa_zonelist_order_handler,
         },
 #endif
 #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \
    (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
         {
-                .ctl_name       = VM_VDSO_ENABLED,
                 .procname       = "vdso_enabled",
                 .data           = &vdso_enabled,
                 .maxlen         = sizeof(vdso_enabled),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec,
                 .extra1         = &zero,
         },
 #endif
 #ifdef CONFIG_HIGHMEM
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "highmem_is_dirtyable",
                 .data           = &vm_highmem_is_dirtyable,
                 .maxlen         = sizeof(vm_highmem_is_dirtyable),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &zero,
                 .extra2         = &one,
         },
 #endif
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "scan_unevictable_pages",
                 .data           = &scan_unevictable_pages,
                 .maxlen         = sizeof(scan_unevictable_pages),
                 .mode           = 0644,
-                .proc_handler   = &scan_unevictable_handler,
+                .proc_handler   = scan_unevictable_handler,
         },
 #ifdef CONFIG_MEMORY_FAILURE
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "memory_failure_early_kill",
                 .data           = &sysctl_memory_failure_early_kill,
                 .maxlen         = sizeof(sysctl_memory_failure_early_kill),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &zero,
                 .extra2         = &one,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "memory_failure_recovery",
                 .data           = &sysctl_memory_failure_recovery,
                 .maxlen         = sizeof(sysctl_memory_failure_recovery),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &zero,
                 .extra2         = &one,
         },
@@ -1427,116 +1284,104 @@ static struct ctl_table vm_table[] = {
  * NOTE: do not add new entries to this table unless you have read
  * Documentation/sysctl/ctl_unnumbered.txt
  */
-        { .ctl_name = 0 }
+        { }
 };
 
 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
 static struct ctl_table binfmt_misc_table[] = {
-        { .ctl_name = 0 }
+        { }
 };
 #endif
 
 static struct ctl_table fs_table[] = {
         {
-                .ctl_name       = FS_NRINODE,
                 .procname       = "inode-nr",
                 .data           = &inodes_stat,
                 .maxlen         = 2*sizeof(int),
                 .mode           = 0444,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = FS_STATINODE,
                 .procname       = "inode-state",
                 .data           = &inodes_stat,
                 .maxlen         = 7*sizeof(int),
                 .mode           = 0444,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
                 .procname       = "file-nr",
                 .data           = &files_stat,
                 .maxlen         = 3*sizeof(int),
                 .mode           = 0444,
-                .proc_handler   = &proc_nr_files,
+                .proc_handler   = proc_nr_files,
         },
         {
-                .ctl_name       = FS_MAXFILE,
                 .procname       = "file-max",
                 .data           = &files_stat.max_files,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "nr_open",
                 .data           = &sysctl_nr_open,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &sysctl_nr_open_min,
                 .extra2         = &sysctl_nr_open_max,
         },
         {
-                .ctl_name       = FS_DENTRY,
                 .procname       = "dentry-state",
                 .data           = &dentry_stat,
                 .maxlen         = 6*sizeof(int),
                 .mode           = 0444,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
         {
-                .ctl_name       = FS_OVERFLOWUID,
                 .procname       = "overflowuid",
                 .data           = &fs_overflowuid,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &minolduid,
                 .extra2         = &maxolduid,
         },
         {
-                .ctl_name       = FS_OVERFLOWGID,
                 .procname       = "overflowgid",
                 .data           = &fs_overflowgid,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &minolduid,
                 .extra2         = &maxolduid,
         },
 #ifdef CONFIG_FILE_LOCKING
         {
-                .ctl_name       = FS_LEASES,
                 .procname       = "leases-enable",
                 .data           = &leases_enable,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #ifdef CONFIG_DNOTIFY
         {
-                .ctl_name       = FS_DIR_NOTIFY,
                 .procname       = "dir-notify-enable",
                 .data           = &dir_notify_enable,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #ifdef CONFIG_MMU
 #ifdef CONFIG_FILE_LOCKING
         {
-                .ctl_name       = FS_LEASE_TIME,
                 .procname       = "lease-break-time",
                 .data           = &lease_break_time,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec,
+                .proc_handler   = proc_dointvec,
         },
 #endif
 #ifdef CONFIG_AIO
@@ -1545,19 +1390,18 @@ static struct ctl_table fs_table[] = {
                 .data           = &aio_nr,
                 .maxlen         = sizeof(aio_nr),
                 .mode           = 0444,
-                .proc_handler   = &proc_doulongvec_minmax,
+                .proc_handler   = proc_doulongvec_minmax,
         },
         {
                 .procname       = "aio-max-nr",
                 .data           = &aio_max_nr,
                 .maxlen         = sizeof(aio_max_nr),
                 .mode           = 0644,
-                .proc_handler   = &proc_doulongvec_minmax,
+                .proc_handler   = proc_doulongvec_minmax,
         },
 #endif /* CONFIG_AIO */
 #ifdef CONFIG_INOTIFY_USER
         {
-                .ctl_name       = FS_INOTIFY,
                 .procname       = "inotify",
                 .mode           = 0555,
                 .child          = inotify_table,
@@ -1572,19 +1416,16 @@ static struct ctl_table fs_table[] = {
 #endif
 #endif
         {
-                .ctl_name       = KERN_SETUID_DUMPABLE,
                 .procname       = "suid_dumpable",
                 .data           = &suid_dumpable,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
-                .strategy       = &sysctl_intvec,
+                .proc_handler   = proc_dointvec_minmax,
                 .extra1         = &zero,
                 .extra2         = &two,
         },
 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "binfmt_misc",
                 .mode           = 0555,
                 .child          = binfmt_misc_table,
@@ -1594,13 +1435,12 @@ static struct ctl_table fs_table[] = {
  * NOTE: do not add new entries to this table unless you have read
  * Documentation/sysctl/ctl_unnumbered.txt
  */
-        { .ctl_name = 0 }
+        { }
 };
 
 static struct ctl_table debug_table[] = {
 #if defined(CONFIG_X86) || defined(CONFIG_PPC)
         {
-                .ctl_name       = CTL_UNNUMBERED,
                 .procname       = "exception-trace",
                 .data           = &show_unhandled_signals,
                 .maxlen         = sizeof(int),
@@ -1608,11 +1448,11 @@ static struct ctl_table debug_table[] = {
                 .proc_handler   = proc_dointvec
         },
 #endif
-        { .ctl_name = 0 }
+        { }
 };
 
 static struct ctl_table dev_table[] = {
-        { .ctl_name = 0 }
+        { }
 };
 
 static DEFINE_SPINLOCK(sysctl_lock);
@@ -1766,122 +1606,6 @@ void register_sysctl_root(struct ctl_table_root *root)
         spin_unlock(&sysctl_lock);
 }
 
-#ifdef CONFIG_SYSCTL_SYSCALL
-/* Perform the actual read/write of a sysctl table entry. */
-static int do_sysctl_strategy(struct ctl_table_root *root,
-                        struct ctl_table *table,
-                        void __user *oldval, size_t __user *oldlenp,
-                        void __user *newval, size_t newlen)
-{
-        int op = 0, rc;
-
-        if (oldval)
-                op |= MAY_READ;
-        if (newval)
-                op |= MAY_WRITE;
-        if (sysctl_perm(root, table, op))
-                return -EPERM;
-
-        if (table->strategy) {
-                rc = table->strategy(table, oldval, oldlenp, newval, newlen);
-                if (rc < 0)
-                        return rc;
-                if (rc > 0)
-                        return 0;
-        }
-
-        /* If there is no strategy routine, or if the strategy returns
-         * zero, proceed with automatic r/w */
-        if (table->data && table->maxlen) {
-                rc = sysctl_data(table, oldval, oldlenp, newval, newlen);
-                if (rc < 0)
-                        return rc;
-        }
-        return 0;
-}
-
-static int parse_table(int __user *name, int nlen,
-                       void __user *oldval, size_t __user *oldlenp,
-                       void __user *newval, size_t newlen,
-                       struct ctl_table_root *root,
-                       struct ctl_table *table)
-{
-        int n;
-repeat:
-        if (!nlen)
-                return -ENOTDIR;
-        if (get_user(n, name))
-                return -EFAULT;
-        for ( ; table->ctl_name || table->procname; table++) {
-                if (!table->ctl_name)
-                        continue;
-                if (n == table->ctl_name) {
-                        int error;
-                        if (table->child) {
-                                if (sysctl_perm(root, table, MAY_EXEC))
-                                        return -EPERM;
-                                name++;
-                                nlen--;
-                                table = table->child;
-                                goto repeat;
-                        }
-                        error = do_sysctl_strategy(root, table,
-                                                   oldval, oldlenp,
-                                                   newval, newlen);
-                        return error;
-                }
-        }
-        return -ENOTDIR;
-}
-
-int do_sysctl(int __user *name, int nlen, void __user *oldval, size_t __user *oldlenp,
-               void __user *newval, size_t newlen)
-{
-        struct ctl_table_header *head;
-        int error = -ENOTDIR;
-
-        if (nlen <= 0 || nlen >= CTL_MAXNAME)
-                return -ENOTDIR;
-        if (oldval) {
-                int old_len;
-                if (!oldlenp || get_user(old_len, oldlenp))
-                        return -EFAULT;
-        }
-
-        for (head = sysctl_head_next(NULL); head;
-                        head = sysctl_head_next(head)) {
-                error = parse_table(name, nlen, oldval, oldlenp, 
-                                        newval, newlen,
-                                        head->root, head->ctl_table);
-                if (error != -ENOTDIR) {
-                        sysctl_head_finish(head);
-                        break;
-                }
-        }
-        return error;
-}
-
-SYSCALL_DEFINE1(sysctl, struct __sysctl_args __user *, args)
-{
-        struct __sysctl_args tmp;
-        int error;
-
-        if (copy_from_user(&tmp, args, sizeof(tmp)))
-                return -EFAULT;
-
-        error = deprecated_sysctl_warning(&tmp);
-        if (error)
-                goto out;
-
-        lock_kernel();
-        error = do_sysctl(tmp.name, tmp.nlen, tmp.oldval, tmp.oldlenp,
-                          tmp.newval, tmp.newlen);
-        unlock_kernel();
-out:
-        return error;
-}
-#endif /* CONFIG_SYSCTL_SYSCALL */
-
 /*
  * sysctl_perm does NOT grant the superuser all rights automatically, because
  * some sysctl variables are readonly even to root.
@@ -1917,7 +1641,7 @@ int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op)
 
 static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table)
 {
-        for (; table->ctl_name || table->procname; table++) {
+        for (; table->procname; table++) {
                 table->parent = parent;
                 if (table->child)
                         sysctl_set_parent(table, table->child);
@@ -1949,11 +1673,11 @@ static struct ctl_table *is_branch_in(struct ctl_table *branch,
                 return NULL;
 
         /* ... and nothing else */
-        if (branch[1].procname || branch[1].ctl_name)
+        if (branch[1].procname)
                 return NULL;
 
         /* table should contain subdirectory with the same name */
-        for (p = table; p->procname || p->ctl_name; p++) {
+        for (p = table; p->procname; p++) {
                 if (!p->child)
                         continue;
                 if (p->procname && strcmp(p->procname, s) == 0)
@@ -1998,9 +1722,6 @@ static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q)
  *
  * The members of the &struct ctl_table structure are used as follows:
  *
- * ctl_name - This is the numeric sysctl value used by sysctl(2). The number
- *            must be unique within that level of sysctl
- *
  * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not
  *            enter a sysctl file
  *
@@ -2015,8 +1736,6 @@ static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q)
  *
  * proc_handler - the text handler routine (described below)
  *
- * strategy - the strategy routine (described below)
- *
  * de - for internal use by the sysctl routines
  *
  * extra1, extra2 - extra pointers usable by the proc handler routines
@@ -2029,19 +1748,6 @@ static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q)
  * struct enable minimal validation of the values being written to be
  * performed, and the mode field allows minimal authentication.
  *
- * More sophisticated management can be enabled by the provision of a
- * strategy routine with the table entry.  This will be called before
- * any automatic read or write of the data is performed.
- *
- * The strategy routine may return
- *
- * < 0 - Error occurred (error is passed to user process)
- *
- * 0   - OK - proceed with automatic read or write.
- *
- * > 0 - OK - read or write has been done by the strategy routine, so
- *       return immediately.
- *
  * There must be a proc_handler routine for any terminal nodes
  * mirrored under /proc/sys (non-terminals are handled by a built-in
  * directory handler).  Several default handlers are available to
@@ -2068,13 +1774,13 @@ struct ctl_table_header *__register_sysctl_paths(
         struct ctl_table_set *set;
 
         /* Count the path components */
-        for (npath = 0; path[npath].ctl_name || path[npath].procname; ++npath)
+        for (npath = 0; path[npath].procname; ++npath)
                 ;
 
         /*
          * For each path component, allocate a 2-element ctl_table array.
          * The first array element will be filled with the sysctl entry
-         * for this, the second will be the sentinel (ctl_name == 0).
+         * for this, the second will be the sentinel (procname == 0).
          *
          * We allocate everything in one go so that we don't have to
          * worry about freeing additional memory in unregister_sysctl_table.
@@ -2091,7 +1797,6 @@ struct ctl_table_header *__register_sysctl_paths(
         for (n = 0; n < npath; ++n, ++path) {
                 /* Copy the procname */
                 new->procname = path->procname;
-                new->ctl_name = path->ctl_name;
                 new->mode     = 0555;
 
                 *prevp = new;
@@ -2953,286 +2658,6 @@ int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
 
 #endif /* CONFIG_PROC_FS */
 
-
-#ifdef CONFIG_SYSCTL_SYSCALL
-/*
- * General sysctl support routines 
- */
-
-/* The generic sysctl data routine (used if no strategy routine supplied) */
-int sysctl_data(struct ctl_table *table,
-                void __user *oldval, size_t __user *oldlenp,
-                void __user *newval, size_t newlen)
-{
-        size_t len;
-
-        /* Get out of I don't have a variable */
-        if (!table->data || !table->maxlen)
-                return -ENOTDIR;
-
-        if (oldval && oldlenp) {
-                if (get_user(len, oldlenp))
-                        return -EFAULT;
-                if (len) {
-                        if (len > table->maxlen)
-                                len = table->maxlen;
-                        if (copy_to_user(oldval, table->data, len))
-                                return -EFAULT;
-                        if (put_user(len, oldlenp))
-                                return -EFAULT;
-                }
-        }
-
-        if (newval && newlen) {
-                if (newlen > table->maxlen)
-                        newlen = table->maxlen;
-
-                if (copy_from_user(table->data, newval, newlen))
-                        return -EFAULT;
-        }
-        return 1;
-}
-
-/* The generic string strategy routine: */
-int sysctl_string(struct ctl_table *table,
-                  void __user *oldval, size_t __user *oldlenp,
-                  void __user *newval, size_t newlen)
-{
-        if (!table->data || !table->maxlen) 
-                return -ENOTDIR;
-        
-        if (oldval && oldlenp) {
-                size_t bufsize;
-                if (get_user(bufsize, oldlenp))
-                        return -EFAULT;
-                if (bufsize) {
-                        size_t len = strlen(table->data), copied;
-
-                        /* This shouldn't trigger for a well-formed sysctl */
-                        if (len > table->maxlen)
-                                len = table->maxlen;
-
-                        /* Copy up to a max of bufsize-1 bytes of the string */
-                        copied = (len >= bufsize) ? bufsize - 1 : len;
-
-                        if (copy_to_user(oldval, table->data, copied) ||
-                            put_user(0, (char __user *)(oldval + copied)))
-                                return -EFAULT;
-                        if (put_user(len, oldlenp))
-                                return -EFAULT;
-                }
-        }
-        if (newval && newlen) {
-                size_t len = newlen;
-                if (len > table->maxlen)
-                        len = table->maxlen;
-                if(copy_from_user(table->data, newval, len))
-                        return -EFAULT;
-                if (len == table->maxlen)
-                        len--;
-                ((char *) table->data)[len] = 0;
-        }
-        return 1;
-}
-
-/*
- * This function makes sure that all of the integers in the vector
- * are between the minimum and maximum values given in the arrays
- * table->extra1 and table->extra2, respectively.
- */
-int sysctl_intvec(struct ctl_table *table,
-                void __user *oldval, size_t __user *oldlenp,
-                void __user *newval, size_t newlen)
-{
-
-        if (newval && newlen) {
-                int __user *vec = (int __user *) newval;
-                int *min = (int *) table->extra1;
-                int *max = (int *) table->extra2;
-                size_t length;
-                int i;
-
-                if (newlen % sizeof(int) != 0)
-                        return -EINVAL;
-
-                if (!table->extra1 && !table->extra2)
-                        return 0;
-
-                if (newlen > table->maxlen)
-                        newlen = table->maxlen;
-                length = newlen / sizeof(int);
-
-                for (i = 0; i < length; i++) {
-                        int value;
-                        if (get_user(value, vec + i))
-                                return -EFAULT;
-                        if (min && value < min[i])
-                                return -EINVAL;
-                        if (max && value > max[i])
-                                return -EINVAL;
-                }
-        }
-        return 0;
-}
-
-/* Strategy function to convert jiffies to seconds */ 
-int sysctl_jiffies(struct ctl_table *table,
-                void __user *oldval, size_t __user *oldlenp,
-                void __user *newval, size_t newlen)
-{
-        if (oldval && oldlenp) {
-                size_t olen;
-
-                if (get_user(olen, oldlenp))
-                        return -EFAULT;
-                if (olen) {
-                        int val;
-
-                        if (olen < sizeof(int))
-                                return -EINVAL;
-
-                        val = *(int *)(table->data) / HZ;
-                        if (put_user(val, (int __user *)oldval))
-                                return -EFAULT;
-                        if (put_user(sizeof(int), oldlenp))
-                                return -EFAULT;
-                }
-        }
-        if (newval && newlen) { 
-                int new;
-                if (newlen != sizeof(int))
-                        return -EINVAL; 
-                if (get_user(new, (int __user *)newval))
-                        return -EFAULT;
-                *(int *)(table->data) = new*HZ; 
-        }
-        return 1;
-}
-
-/* Strategy function to convert jiffies to seconds */ 
-int sysctl_ms_jiffies(struct ctl_table *table,
-                void __user *oldval, size_t __user *oldlenp,
-                void __user *newval, size_t newlen)
-{
-        if (oldval && oldlenp) {
-                size_t olen;
-
-                if (get_user(olen, oldlenp))
-                        return -EFAULT;
-                if (olen) {
-                        int val;
-
-                        if (olen < sizeof(int))
-                                return -EINVAL;
-
-                        val = jiffies_to_msecs(*(int *)(table->data));
-                        if (put_user(val, (int __user *)oldval))
-                                return -EFAULT;
-                        if (put_user(sizeof(int), oldlenp))
-                                return -EFAULT;
-                }
-        }
-        if (newval && newlen) { 
-                int new;
-                if (newlen != sizeof(int))
-                        return -EINVAL; 
-                if (get_user(new, (int __user *)newval))
-                        return -EFAULT;
-                *(int *)(table->data) = msecs_to_jiffies(new);
-        }
-        return 1;
-}
-
-
-
-#else /* CONFIG_SYSCTL_SYSCALL */
-
-
-SYSCALL_DEFINE1(sysctl, struct __sysctl_args __user *, args)
-{
-        struct __sysctl_args tmp;
-        int error;
-
-        if (copy_from_user(&tmp, args, sizeof(tmp)))
-                return -EFAULT;
-
-        error = deprecated_sysctl_warning(&tmp);
-
-        /* If no error reading the parameters then just -ENOSYS ... */
-        if (!error)
-                error = -ENOSYS;
-
-        return error;
-}
-
-int sysctl_data(struct ctl_table *table,
-                  void __user *oldval, size_t __user *oldlenp,
-                  void __user *newval, size_t newlen)
-{
-        return -ENOSYS;
-}
-
-int sysctl_string(struct ctl_table *table,
-                  void __user *oldval, size_t __user *oldlenp,
-                  void __user *newval, size_t newlen)
-{
-        return -ENOSYS;
-}
-
-int sysctl_intvec(struct ctl_table *table,
-                void __user *oldval, size_t __user *oldlenp,
-                void __user *newval, size_t newlen)
-{
-        return -ENOSYS;
-}
-
-int sysctl_jiffies(struct ctl_table *table,
-                void __user *oldval, size_t __user *oldlenp,
-                void __user *newval, size_t newlen)
-{
-        return -ENOSYS;
-}
-
-int sysctl_ms_jiffies(struct ctl_table *table,
-                void __user *oldval, size_t __user *oldlenp,
-                void __user *newval, size_t newlen)
-{
-        return -ENOSYS;
-}
-
-#endif /* CONFIG_SYSCTL_SYSCALL */
-
-static int deprecated_sysctl_warning(struct __sysctl_args *args)
-{
-        static int msg_count;
-        int name[CTL_MAXNAME];
-        int i;
-
-        /* Check args->nlen. */
-        if (args->nlen < 0 || args->nlen > CTL_MAXNAME)
-                return -ENOTDIR;
-
-        /* Read in the sysctl name for better debug message logging */
-        for (i = 0; i < args->nlen; i++)
-                if (get_user(name[i], args->name + i))
-                        return -EFAULT;
-
-        /* Ignore accesses to kernel.version */
-        if ((args->nlen == 2) && (name[0] == CTL_KERN) && (name[1] == KERN_VERSION))
-                return 0;
-
-        if (msg_count < 5) {
-                msg_count++;
-                printk(KERN_INFO
-                        "warning: process `%s' used the deprecated sysctl "
-                        "system call with ", current->comm);
-                for (i = 0; i < args->nlen; i++)
-                        printk("%d.", name[i]);
-                printk("\n");
-        }
-        return 0;
-}
-
 /*
  * No sense putting this after each symbol definition, twice,
  * exception granted :-)
@@ -3247,9 +2672,4 @@ EXPORT_SYMBOL(proc_doulongvec_minmax);
 EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax);
 EXPORT_SYMBOL(register_sysctl_table);
 EXPORT_SYMBOL(register_sysctl_paths);
-EXPORT_SYMBOL(sysctl_intvec);
-EXPORT_SYMBOL(sysctl_jiffies);
-EXPORT_SYMBOL(sysctl_ms_jiffies);
-EXPORT_SYMBOL(sysctl_string);
-EXPORT_SYMBOL(sysctl_data);
 EXPORT_SYMBOL(unregister_sysctl_table);
diff --git a/kernel/sysctl_binary.c b/kernel/sysctl_binary.c
new file mode 100644
index 000000000000..112533d5fc08
--- /dev/null
+++ b/kernel/sysctl_binary.c
@@ -0,0 +1,1514 @@
+#include <linux/stat.h>
+#include <linux/sysctl.h>
+#include "../fs/xfs/linux-2.6/xfs_sysctl.h"
+#include <linux/sunrpc/debug.h>
+#include <linux/string.h>
+#include <net/ip_vs.h>
+#include <linux/syscalls.h>
+#include <linux/namei.h>
+#include <linux/mount.h>
+#include <linux/fs.h>
+#include <linux/nsproxy.h>
+#include <linux/pid_namespace.h>
+#include <linux/file.h>
+#include <linux/ctype.h>
+#include <linux/netdevice.h>
+
+#ifdef CONFIG_SYSCTL_SYSCALL
+
+struct bin_table;
+typedef ssize_t bin_convert_t(struct file *file,
+        void __user *oldval, size_t oldlen, void __user *newval, size_t newlen);
+
+static bin_convert_t bin_dir;
+static bin_convert_t bin_string;
+static bin_convert_t bin_intvec;
+static bin_convert_t bin_ulongvec;
+static bin_convert_t bin_uuid;
+static bin_convert_t bin_dn_node_address;
+
+#define CTL_DIR   bin_dir
+#define CTL_STR   bin_string
+#define CTL_INT   bin_intvec
+#define CTL_ULONG bin_ulongvec
+#define CTL_UUID  bin_uuid
+#define CTL_DNADR bin_dn_node_address
+
+#define BUFSZ 256
+
+struct bin_table {
+        bin_convert_t           *convert;
+        int                     ctl_name;
+        const char              *procname;
+        const struct bin_table  *child;
+};
+
+static const struct bin_table bin_random_table[] = {
+        { CTL_INT,      RANDOM_POOLSIZE,        "poolsize" },
+        { CTL_INT,      RANDOM_ENTROPY_COUNT,   "entropy_avail" },
+        { CTL_INT,      RANDOM_READ_THRESH,     "read_wakeup_threshold" },
+        { CTL_INT,      RANDOM_WRITE_THRESH,    "write_wakeup_threshold" },
+        { CTL_UUID,     RANDOM_BOOT_ID,         "boot_id" },
+        { CTL_UUID,     RANDOM_UUID,            "uuid" },
+        {}
+};
+
+static const struct bin_table bin_pty_table[] = {
+        { CTL_INT,      PTY_MAX,        "max" },
+        { CTL_INT,      PTY_NR,         "nr" },
+        {}
+};
+
+static const struct bin_table bin_kern_table[] = {
+        { CTL_STR,      KERN_OSTYPE,                    "ostype" },
+        { CTL_STR,      KERN_OSRELEASE,                 "osrelease" },
+        /* KERN_OSREV not used */
+        { CTL_STR,      KERN_VERSION,                   "version" },
+        /* KERN_SECUREMASK not used */
+        /* KERN_PROF not used */
+        { CTL_STR,      KERN_NODENAME,                  "hostname" },
+        { CTL_STR,      KERN_DOMAINNAME,                "domainname" },
+
+        { CTL_INT,      KERN_PANIC,                     "panic" },
+        { CTL_INT,      KERN_REALROOTDEV,               "real-root-dev" },
+
+        { CTL_STR,      KERN_SPARC_REBOOT,              "reboot-cmd" },
+        { CTL_INT,      KERN_CTLALTDEL,                 "ctrl-alt-del" },
+        { CTL_INT,      KERN_PRINTK,                    "printk" },
+
+        /* KERN_NAMETRANS not used */
+        /* KERN_PPC_HTABRECLAIM not used */
+        /* KERN_PPC_ZEROPAGED not used */
+        { CTL_INT,      KERN_PPC_POWERSAVE_NAP,         "powersave-nap" },
+
+        { CTL_STR,      KERN_MODPROBE,                  "modprobe" },
+        { CTL_INT,      KERN_SG_BIG_BUFF,               "sg-big-buff" },
+        { CTL_INT,      KERN_ACCT,                      "acct" },
+        /* KERN_PPC_L2CR "l2cr" no longer used */
+
+        /* KERN_RTSIGNR not used */
+        /* KERN_RTSIGMAX not used */
+
+        { CTL_ULONG,    KERN_SHMMAX,                    "shmmax" },
+        { CTL_INT,      KERN_MSGMAX,                    "msgmax" },
+        { CTL_INT,      KERN_MSGMNB,                    "msgmnb" },
+        /* KERN_MSGPOOL not used*/
+        { CTL_INT,      KERN_SYSRQ,                     "sysrq" },
+        { CTL_INT,      KERN_MAX_THREADS,               "threads-max" },
+        { CTL_DIR,      KERN_RANDOM,                    "random",       bin_random_table },
+        { CTL_ULONG,    KERN_SHMALL,                    "shmall" },
+        { CTL_INT,      KERN_MSGMNI,                    "msgmni" },
+        { CTL_INT,      KERN_SEM,                       "sem" },
+        { CTL_INT,      KERN_SPARC_STOP_A,              "stop-a" },
+        { CTL_INT,      KERN_SHMMNI,                    "shmmni" },
+
+        { CTL_INT,      KERN_OVERFLOWUID,               "overflowuid" },
+        { CTL_INT,      KERN_OVERFLOWGID,               "overflowgid" },
+
+        { CTL_STR,      KERN_HOTPLUG,                   "hotplug", },
+        { CTL_INT,      KERN_IEEE_EMULATION_WARNINGS,   "ieee_emulation_warnings" },
+
+        { CTL_INT,      KERN_S390_USER_DEBUG_LOGGING,   "userprocess_debug" },
+        { CTL_INT,      KERN_CORE_USES_PID,             "core_uses_pid" },
+        /* KERN_TAINTED "tainted" no longer used */
+        { CTL_INT,      KERN_CADPID,                    "cad_pid" },
+        { CTL_INT,      KERN_PIDMAX,                    "pid_max" },
+        { CTL_STR,      KERN_CORE_PATTERN,              "core_pattern" },
+        { CTL_INT,      KERN_PANIC_ON_OOPS,             "panic_on_oops" },
+        { CTL_INT,      KERN_HPPA_PWRSW,                "soft-power" },
+        { CTL_INT,      KERN_HPPA_UNALIGNED,            "unaligned-trap" },
+
+        { CTL_INT,      KERN_PRINTK_RATELIMIT,          "printk_ratelimit" },
+        { CTL_INT,      KERN_PRINTK_RATELIMIT_BURST,    "printk_ratelimit_burst" },
+
+        { CTL_DIR,      KERN_PTY,                       "pty",          bin_pty_table },
+        { CTL_INT,      KERN_NGROUPS_MAX,               "ngroups_max" },
+        { CTL_INT,      KERN_SPARC_SCONS_PWROFF,        "scons-poweroff" },
+        /* KERN_HZ_TIMER "hz_timer" no longer used */
+        { CTL_INT,      KERN_UNKNOWN_NMI_PANIC,         "unknown_nmi_panic" },
+        { CTL_INT,      KERN_BOOTLOADER_TYPE,           "bootloader_type" },
+        { CTL_INT,      KERN_RANDOMIZE,                 "randomize_va_space" },
+
+        { CTL_INT,      KERN_SPIN_RETRY,                "spin_retry" },
+        /* KERN_ACPI_VIDEO_FLAGS "acpi_video_flags" no longer used */
+        { CTL_INT,      KERN_IA64_UNALIGNED,            "ignore-unaligned-usertrap" },
+        { CTL_INT,      KERN_COMPAT_LOG,                "compat-log" },
+        { CTL_INT,      KERN_MAX_LOCK_DEPTH,            "max_lock_depth" },
+        { CTL_INT,      KERN_NMI_WATCHDOG,              "nmi_watchdog" },
+        { CTL_INT,      KERN_PANIC_ON_NMI,              "panic_on_unrecovered_nmi" },
+        {}
+};
+
+static const struct bin_table bin_vm_table[] = {
+        { CTL_INT,      VM_OVERCOMMIT_MEMORY,           "overcommit_memory" },
+        { CTL_INT,      VM_PAGE_CLUSTER,                "page-cluster" },
+        { CTL_INT,      VM_DIRTY_BACKGROUND,            "dirty_background_ratio" },
+        { CTL_INT,      VM_DIRTY_RATIO,                 "dirty_ratio" },
+        /* VM_DIRTY_WB_CS "dirty_writeback_centisecs" no longer used */
+        /* VM_DIRTY_EXPIRE_CS "dirty_expire_centisecs" no longer used */
+        { CTL_INT,      VM_NR_PDFLUSH_THREADS,          "nr_pdflush_threads" },
+        { CTL_INT,      VM_OVERCOMMIT_RATIO,            "overcommit_ratio" },
+        /* VM_PAGEBUF unused */
+        /* VM_HUGETLB_PAGES "nr_hugepages" no longer used */
+        { CTL_INT,      VM_SWAPPINESS,                  "swappiness" },
+        { CTL_INT,      VM_LOWMEM_RESERVE_RATIO,        "lowmem_reserve_ratio" },
+        { CTL_INT,      VM_MIN_FREE_KBYTES,             "min_free_kbytes" },
+        { CTL_INT,      VM_MAX_MAP_COUNT,               "max_map_count" },
+        { CTL_INT,      VM_LAPTOP_MODE,                 "laptop_mode" },
+        { CTL_INT,      VM_BLOCK_DUMP,                  "block_dump" },
+        { CTL_INT,      VM_HUGETLB_GROUP,               "hugetlb_shm_group" },
+        { CTL_INT,      VM_VFS_CACHE_PRESSURE,  "vfs_cache_pressure" },
+        { CTL_INT,      VM_LEGACY_VA_LAYOUT,            "legacy_va_layout" },
+        /* VM_SWAP_TOKEN_TIMEOUT unused */
+        { CTL_INT,      VM_DROP_PAGECACHE,              "drop_caches" },
+        { CTL_INT,      VM_PERCPU_PAGELIST_FRACTION,    "percpu_pagelist_fraction" },
+        { CTL_INT,      VM_ZONE_RECLAIM_MODE,           "zone_reclaim_mode" },
+        { CTL_INT,      VM_MIN_UNMAPPED,                "min_unmapped_ratio" },
+        { CTL_INT,      VM_PANIC_ON_OOM,                "panic_on_oom" },
+        { CTL_INT,      VM_VDSO_ENABLED,                "vdso_enabled" },
+        { CTL_INT,      VM_MIN_SLAB,                    "min_slab_ratio" },
+
+        {}
+};
+
+static const struct bin_table bin_net_core_table[] = {
+        { CTL_INT,      NET_CORE_WMEM_MAX,      "wmem_max" },
+        { CTL_INT,      NET_CORE_RMEM_MAX,      "rmem_max" },
+        { CTL_INT,      NET_CORE_WMEM_DEFAULT,  "wmem_default" },
+        { CTL_INT,      NET_CORE_RMEM_DEFAULT,  "rmem_default" },
+        /* NET_CORE_DESTROY_DELAY unused */
+        { CTL_INT,      NET_CORE_MAX_BACKLOG,   "netdev_max_backlog" },
+        /* NET_CORE_FASTROUTE unused */
+        { CTL_INT,      NET_CORE_MSG_COST,      "message_cost" },
+        { CTL_INT,      NET_CORE_MSG_BURST,     "message_burst" },
+        { CTL_INT,      NET_CORE_OPTMEM_MAX,    "optmem_max" },
+        /* NET_CORE_HOT_LIST_LENGTH unused */
+        /* NET_CORE_DIVERT_VERSION unused */
+        /* NET_CORE_NO_CONG_THRESH unused */
+        /* NET_CORE_NO_CONG unused */
+        /* NET_CORE_LO_CONG unused */
+        /* NET_CORE_MOD_CONG unused */
+        { CTL_INT,      NET_CORE_DEV_WEIGHT,    "dev_weight" },
+        { CTL_INT,      NET_CORE_SOMAXCONN,     "somaxconn" },
+        { CTL_INT,      NET_CORE_BUDGET,        "netdev_budget" },
+        { CTL_INT,      NET_CORE_AEVENT_ETIME,  "xfrm_aevent_etime" },
+        { CTL_INT,      NET_CORE_AEVENT_RSEQTH, "xfrm_aevent_rseqth" },
+        { CTL_INT,      NET_CORE_WARNINGS,      "warnings" },
+        {},
+};
+
+static const struct bin_table bin_net_unix_table[] = {
+        /* NET_UNIX_DESTROY_DELAY unused */
+        /* NET_UNIX_DELETE_DELAY unused */
+        { CTL_INT,      NET_UNIX_MAX_DGRAM_QLEN,        "max_dgram_qlen" },
+        {}
+};
+
+static const struct bin_table bin_net_ipv4_route_table[] = {
+        { CTL_INT,      NET_IPV4_ROUTE_FLUSH,                   "flush" },
+        /* NET_IPV4_ROUTE_MIN_DELAY "min_delay" no longer used */
+        /* NET_IPV4_ROUTE_MAX_DELAY "max_delay" no longer used */
+        { CTL_INT,      NET_IPV4_ROUTE_GC_THRESH,               "gc_thresh" },
+        { CTL_INT,      NET_IPV4_ROUTE_MAX_SIZE,                "max_size" },
+        { CTL_INT,      NET_IPV4_ROUTE_GC_MIN_INTERVAL,         "gc_min_interval" },
+        { CTL_INT,      NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS,      "gc_min_interval_ms" },
+        { CTL_INT,      NET_IPV4_ROUTE_GC_TIMEOUT,              "gc_timeout" },
+        { CTL_INT,      NET_IPV4_ROUTE_GC_INTERVAL,             "gc_interval" },
+        { CTL_INT,      NET_IPV4_ROUTE_REDIRECT_LOAD,           "redirect_load" },
+        { CTL_INT,      NET_IPV4_ROUTE_REDIRECT_NUMBER,         "redirect_number" },
+        { CTL_INT,      NET_IPV4_ROUTE_REDIRECT_SILENCE,        "redirect_silence" },
+        { CTL_INT,      NET_IPV4_ROUTE_ERROR_COST,              "error_cost" },
+        { CTL_INT,      NET_IPV4_ROUTE_ERROR_BURST,             "error_burst" },
+        { CTL_INT,      NET_IPV4_ROUTE_GC_ELASTICITY,           "gc_elasticity" },
+        { CTL_INT,      NET_IPV4_ROUTE_MTU_EXPIRES,             "mtu_expires" },
+        { CTL_INT,      NET_IPV4_ROUTE_MIN_PMTU,                "min_pmtu" },
+        { CTL_INT,      NET_IPV4_ROUTE_MIN_ADVMSS,              "min_adv_mss" },
+        { CTL_INT,      NET_IPV4_ROUTE_SECRET_INTERVAL,         "secret_interval" },
+        {}
+};
+
+static const struct bin_table bin_net_ipv4_conf_vars_table[] = {
+        { CTL_INT,      NET_IPV4_CONF_FORWARDING,               "forwarding" },
+        { CTL_INT,      NET_IPV4_CONF_MC_FORWARDING,            "mc_forwarding" },
+
+        { CTL_INT,      NET_IPV4_CONF_ACCEPT_REDIRECTS,         "accept_redirects" },
+        { CTL_INT,      NET_IPV4_CONF_SECURE_REDIRECTS,         "secure_redirects" },
+        { CTL_INT,      NET_IPV4_CONF_SEND_REDIRECTS,           "send_redirects" },
+        { CTL_INT,      NET_IPV4_CONF_SHARED_MEDIA,             "shared_media" },
+        { CTL_INT,      NET_IPV4_CONF_RP_FILTER,                "rp_filter" },
+        { CTL_INT,      NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE,      "accept_source_route" },
+        { CTL_INT,      NET_IPV4_CONF_PROXY_ARP,                "proxy_arp" },
+        { CTL_INT,      NET_IPV4_CONF_MEDIUM_ID,                "medium_id" },
+        { CTL_INT,      NET_IPV4_CONF_BOOTP_RELAY,              "bootp_relay" },
+        { CTL_INT,      NET_IPV4_CONF_LOG_MARTIANS,             "log_martians" },
+        { CTL_INT,      NET_IPV4_CONF_TAG,                      "tag" },
+        { CTL_INT,      NET_IPV4_CONF_ARPFILTER,                "arp_filter" },
+        { CTL_INT,      NET_IPV4_CONF_ARP_ANNOUNCE,             "arp_announce" },
+        { CTL_INT,      NET_IPV4_CONF_ARP_IGNORE,               "arp_ignore" },
+        { CTL_INT,      NET_IPV4_CONF_ARP_ACCEPT,               "arp_accept" },
+        { CTL_INT,      NET_IPV4_CONF_ARP_NOTIFY,               "arp_notify" },
+
+        { CTL_INT,      NET_IPV4_CONF_NOXFRM,                   "disable_xfrm" },
+        { CTL_INT,      NET_IPV4_CONF_NOPOLICY,                 "disable_policy" },
+        { CTL_INT,      NET_IPV4_CONF_FORCE_IGMP_VERSION,       "force_igmp_version" },
+        { CTL_INT,      NET_IPV4_CONF_PROMOTE_SECONDARIES,      "promote_secondaries" },
+        {}
+};
+
+static const struct bin_table bin_net_ipv4_conf_table[] = {
+        { CTL_DIR,      NET_PROTO_CONF_ALL,     "all",          bin_net_ipv4_conf_vars_table },
+        { CTL_DIR,      NET_PROTO_CONF_DEFAULT, "default",      bin_net_ipv4_conf_vars_table },
+        { CTL_DIR,      0, NULL, bin_net_ipv4_conf_vars_table },
+        {}
+};
+
+static const struct bin_table bin_net_neigh_vars_table[] = {
+        { CTL_INT,      NET_NEIGH_MCAST_SOLICIT,        "mcast_solicit" },
+        { CTL_INT,      NET_NEIGH_UCAST_SOLICIT,        "ucast_solicit" },
+        { CTL_INT,      NET_NEIGH_APP_SOLICIT,          "app_solicit" },
+        /* NET_NEIGH_RETRANS_TIME "retrans_time" no longer used */
+        { CTL_INT,      NET_NEIGH_REACHABLE_TIME,       "base_reachable_time" },
+        { CTL_INT,      NET_NEIGH_DELAY_PROBE_TIME,     "delay_first_probe_time" },
+        { CTL_INT,      NET_NEIGH_GC_STALE_TIME,        "gc_stale_time" },
+        { CTL_INT,      NET_NEIGH_UNRES_QLEN,           "unres_qlen" },
+        { CTL_INT,      NET_NEIGH_PROXY_QLEN,           "proxy_qlen" },
+        /* NET_NEIGH_ANYCAST_DELAY "anycast_delay" no longer used */
+        /* NET_NEIGH_PROXY_DELAY "proxy_delay" no longer used */
+        /* NET_NEIGH_LOCKTIME "locktime" no longer used */
+        { CTL_INT,      NET_NEIGH_GC_INTERVAL,          "gc_interval" },
+        { CTL_INT,      NET_NEIGH_GC_THRESH1,           "gc_thresh1" },
+        { CTL_INT,      NET_NEIGH_GC_THRESH2,           "gc_thresh2" },
+        { CTL_INT,      NET_NEIGH_GC_THRESH3,           "gc_thresh3" },
+        { CTL_INT,      NET_NEIGH_RETRANS_TIME_MS,      "retrans_time_ms" },
+        { CTL_INT,      NET_NEIGH_REACHABLE_TIME_MS,    "base_reachable_time_ms" },
+        {}
+};
+
+static const struct bin_table bin_net_neigh_table[] = {
+        { CTL_DIR,      NET_PROTO_CONF_DEFAULT, "default", bin_net_neigh_vars_table },
+        { CTL_DIR,      0, NULL, bin_net_neigh_vars_table },
+        {}
+};
+
+static const struct bin_table bin_net_ipv4_netfilter_table[] = {
+        { CTL_INT,      NET_IPV4_NF_CONNTRACK_MAX,              "ip_conntrack_max" },
+
+        /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT "ip_conntrack_tcp_timeout_syn_sent" no longer used */
+        /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV "ip_conntrack_tcp_timeout_syn_recv" no longer used */
+        /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED "ip_conntrack_tcp_timeout_established" no longer used */
+        /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT "ip_conntrack_tcp_timeout_fin_wait" no longer used */
+        /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT "ip_conntrack_tcp_timeout_close_wait" no longer used */
+        /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK "ip_conntrack_tcp_timeout_last_ack" no longer used */
+        /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT "ip_conntrack_tcp_timeout_time_wait" no longer used */
+        /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE "ip_conntrack_tcp_timeout_close" no longer used */
+
+        /* NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT "ip_conntrack_udp_timeout" no longer used */
+        /* NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM "ip_conntrack_udp_timeout_stream" no longer used */
+        /* NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT "ip_conntrack_icmp_timeout" no longer used */
+        /* NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT "ip_conntrack_generic_timeout" no longer used */
+
+        { CTL_INT,      NET_IPV4_NF_CONNTRACK_BUCKETS,          "ip_conntrack_buckets" },
+        { CTL_INT,      NET_IPV4_NF_CONNTRACK_LOG_INVALID,      "ip_conntrack_log_invalid" },
+        /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS "ip_conntrack_tcp_timeout_max_retrans" no longer used */
+        { CTL_INT,      NET_IPV4_NF_CONNTRACK_TCP_LOOSE,        "ip_conntrack_tcp_loose" },
+        { CTL_INT,      NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL,   "ip_conntrack_tcp_be_liberal" },
+        { CTL_INT,      NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS,  "ip_conntrack_tcp_max_retrans" },
+
+        /* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED "ip_conntrack_sctp_timeout_closed" no longer used */
+        /* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT "ip_conntrack_sctp_timeout_cookie_wait" no longer used */
+        /* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED "ip_conntrack_sctp_timeout_cookie_echoed" no longer used */
+        /* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED "ip_conntrack_sctp_timeout_established" no longer used */
+        /* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT "ip_conntrack_sctp_timeout_shutdown_sent" no longer used */
+        /* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD "ip_conntrack_sctp_timeout_shutdown_recd" no longer used */
+        /* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT "ip_conntrack_sctp_timeout_shutdown_ack_sent" no longer used */
+
+        { CTL_INT,      NET_IPV4_NF_CONNTRACK_COUNT,            "ip_conntrack_count" },
+        { CTL_INT,      NET_IPV4_NF_CONNTRACK_CHECKSUM,         "ip_conntrack_checksum" },
+        {}
+};
+
+static const struct bin_table bin_net_ipv4_table[] = {
+        {CTL_INT,       NET_IPV4_FORWARD,                       "ip_forward" },
+
+        { CTL_DIR,      NET_IPV4_CONF,          "conf",         bin_net_ipv4_conf_table },
+        { CTL_DIR,      NET_IPV4_NEIGH,         "neigh",        bin_net_neigh_table },
+        { CTL_DIR,      NET_IPV4_ROUTE,         "route",        bin_net_ipv4_route_table },
+        /* NET_IPV4_FIB_HASH unused */
+        { CTL_DIR,      NET_IPV4_NETFILTER,     "netfilter",    bin_net_ipv4_netfilter_table },
+
+        { CTL_INT,      NET_IPV4_TCP_TIMESTAMPS,                "tcp_timestamps" },
+        { CTL_INT,      NET_IPV4_TCP_WINDOW_SCALING,            "tcp_window_scaling" },
+        { CTL_INT,      NET_IPV4_TCP_SACK,                      "tcp_sack" },
+        { CTL_INT,      NET_IPV4_TCP_RETRANS_COLLAPSE,          "tcp_retrans_collapse" },
+        { CTL_INT,      NET_IPV4_DEFAULT_TTL,                   "ip_default_ttl" },
+        /* NET_IPV4_AUTOCONFIG unused */
+        { CTL_INT,      NET_IPV4_NO_PMTU_DISC,                  "ip_no_pmtu_disc" },
+        { CTL_INT,      NET_IPV4_NONLOCAL_BIND,                 "ip_nonlocal_bind" },
+        { CTL_INT,      NET_IPV4_TCP_SYN_RETRIES,               "tcp_syn_retries" },
+        { CTL_INT,      NET_TCP_SYNACK_RETRIES,                 "tcp_synack_retries" },
+        { CTL_INT,      NET_TCP_MAX_ORPHANS,                    "tcp_max_orphans" },
+        { CTL_INT,      NET_TCP_MAX_TW_BUCKETS,                 "tcp_max_tw_buckets" },
+        { CTL_INT,      NET_IPV4_DYNADDR,                       "ip_dynaddr" },
+        { CTL_INT,      NET_IPV4_TCP_KEEPALIVE_TIME,            "tcp_keepalive_time" },
+        { CTL_INT,      NET_IPV4_TCP_KEEPALIVE_PROBES,          "tcp_keepalive_probes" },
+        { CTL_INT,      NET_IPV4_TCP_KEEPALIVE_INTVL,           "tcp_keepalive_intvl" },
+        { CTL_INT,      NET_IPV4_TCP_RETRIES1,                  "tcp_retries1" },
+        { CTL_INT,      NET_IPV4_TCP_RETRIES2,                  "tcp_retries2" },
+        { CTL_INT,      NET_IPV4_TCP_FIN_TIMEOUT,               "tcp_fin_timeout" },
+        { CTL_INT,      NET_TCP_SYNCOOKIES,                     "tcp_syncookies" },
+        { CTL_INT,      NET_TCP_TW_RECYCLE,                     "tcp_tw_recycle" },
+        { CTL_INT,      NET_TCP_ABORT_ON_OVERFLOW,              "tcp_abort_on_overflow" },
+        { CTL_INT,      NET_TCP_STDURG,                         "tcp_stdurg" },
+        { CTL_INT,      NET_TCP_RFC1337,                        "tcp_rfc1337" },
+        { CTL_INT,      NET_TCP_MAX_SYN_BACKLOG,                "tcp_max_syn_backlog" },
+        { CTL_INT,      NET_IPV4_LOCAL_PORT_RANGE,              "ip_local_port_range" },
+        { CTL_INT,      NET_IPV4_IGMP_MAX_MEMBERSHIPS,          "igmp_max_memberships" },
+        { CTL_INT,      NET_IPV4_IGMP_MAX_MSF,                  "igmp_max_msf" },
+        { CTL_INT,      NET_IPV4_INET_PEER_THRESHOLD,           "inet_peer_threshold" },
+        { CTL_INT,      NET_IPV4_INET_PEER_MINTTL,              "inet_peer_minttl" },
+        { CTL_INT,      NET_IPV4_INET_PEER_MAXTTL,              "inet_peer_maxttl" },
+        { CTL_INT,      NET_IPV4_INET_PEER_GC_MINTIME,          "inet_peer_gc_mintime" },
+        { CTL_INT,      NET_IPV4_INET_PEER_GC_MAXTIME,          "inet_peer_gc_maxtime" },
+        { CTL_INT,      NET_TCP_ORPHAN_RETRIES,                 "tcp_orphan_retries" },
+        { CTL_INT,      NET_TCP_FACK,                           "tcp_fack" },
+        { CTL_INT,      NET_TCP_REORDERING,                     "tcp_reordering" },
+        { CTL_INT,      NET_TCP_ECN,                            "tcp_ecn" },
+        { CTL_INT,      NET_TCP_DSACK,                          "tcp_dsack" },
+        { CTL_INT,      NET_TCP_MEM,                            "tcp_mem" },
+        { CTL_INT,      NET_TCP_WMEM,                           "tcp_wmem" },
+        { CTL_INT,      NET_TCP_RMEM,                           "tcp_rmem" },
+        { CTL_INT,      NET_TCP_APP_WIN,                        "tcp_app_win" },
+        { CTL_INT,      NET_TCP_ADV_WIN_SCALE,                  "tcp_adv_win_scale" },
+        { CTL_INT,      NET_TCP_TW_REUSE,                       "tcp_tw_reuse" },
+        { CTL_INT,      NET_TCP_FRTO,                           "tcp_frto" },
+        { CTL_INT,      NET_TCP_FRTO_RESPONSE,                  "tcp_frto_response" },
+        { CTL_INT,      NET_TCP_LOW_LATENCY,                    "tcp_low_latency" },
+        { CTL_INT,      NET_TCP_NO_METRICS_SAVE,                "tcp_no_metrics_save" },
+        { CTL_INT,      NET_TCP_MODERATE_RCVBUF,                "tcp_moderate_rcvbuf" },
+        { CTL_INT,      NET_TCP_TSO_WIN_DIVISOR,                "tcp_tso_win_divisor" },
+        { CTL_STR,      NET_TCP_CONG_CONTROL,                   "tcp_congestion_control" },
+        { CTL_INT,      NET_TCP_ABC,                            "tcp_abc" },
+        { CTL_INT,      NET_TCP_MTU_PROBING,                    "tcp_mtu_probing" },
+        { CTL_INT,      NET_TCP_BASE_MSS,                       "tcp_base_mss" },
+        { CTL_INT,      NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS, "tcp_workaround_signed_windows" },
+        { CTL_INT,      NET_TCP_DMA_COPYBREAK,                  "tcp_dma_copybreak" },
+        { CTL_INT,      NET_TCP_SLOW_START_AFTER_IDLE,          "tcp_slow_start_after_idle" },
+        { CTL_INT,      NET_CIPSOV4_CACHE_ENABLE,               "cipso_cache_enable" },
+        { CTL_INT,      NET_CIPSOV4_CACHE_BUCKET_SIZE,          "cipso_cache_bucket_size" },
+        { CTL_INT,      NET_CIPSOV4_RBM_OPTFMT,                 "cipso_rbm_optfmt" },
+        { CTL_INT,      NET_CIPSOV4_RBM_STRICTVALID,            "cipso_rbm_strictvalid" },
+        /* NET_TCP_AVAIL_CONG_CONTROL "tcp_available_congestion_control" no longer used */
+        { CTL_STR,      NET_TCP_ALLOWED_CONG_CONTROL,           "tcp_allowed_congestion_control" },
+        { CTL_INT,      NET_TCP_MAX_SSTHRESH,                   "tcp_max_ssthresh" },
+
+        { CTL_INT,      NET_IPV4_ICMP_ECHO_IGNORE_ALL,          "icmp_echo_ignore_all" },
+        { CTL_INT,      NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS,   "icmp_echo_ignore_broadcasts" },
+        { CTL_INT,      NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES,     "icmp_ignore_bogus_error_responses" },
+        { CTL_INT,      NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,        "icmp_errors_use_inbound_ifaddr" },
+        { CTL_INT,      NET_IPV4_ICMP_RATELIMIT,                "icmp_ratelimit" },
+        { CTL_INT,      NET_IPV4_ICMP_RATEMASK,                 "icmp_ratemask" },
+
+        { CTL_INT,      NET_IPV4_IPFRAG_HIGH_THRESH,            "ipfrag_high_thresh" },
+        { CTL_INT,      NET_IPV4_IPFRAG_LOW_THRESH,             "ipfrag_low_thresh" },
+        { CTL_INT,      NET_IPV4_IPFRAG_TIME,                   "ipfrag_time" },
+
+        { CTL_INT,      NET_IPV4_IPFRAG_SECRET_INTERVAL,        "ipfrag_secret_interval" },
+        /* NET_IPV4_IPFRAG_MAX_DIST "ipfrag_max_dist" no longer used */
+
+        { CTL_INT,      2088 /* NET_IPQ_QMAX */,                "ip_queue_maxlen" },
+
+        /* NET_TCP_DEFAULT_WIN_SCALE unused */
+        /* NET_TCP_BIC_BETA unused */
+        /* NET_IPV4_TCP_MAX_KA_PROBES unused */
+        /* NET_IPV4_IP_MASQ_DEBUG unused */
+        /* NET_TCP_SYN_TAILDROP unused */
+        /* NET_IPV4_ICMP_SOURCEQUENCH_RATE unused */
+        /* NET_IPV4_ICMP_DESTUNREACH_RATE unused */
+        /* NET_IPV4_ICMP_TIMEEXCEED_RATE unused */
+        /* NET_IPV4_ICMP_PARAMPROB_RATE unused */
+        /* NET_IPV4_ICMP_ECHOREPLY_RATE unused */
+        /* NET_IPV4_ALWAYS_DEFRAG unused */
+        {}
+};
+
+static const struct bin_table bin_net_ipx_table[] = {
+        { CTL_INT,      NET_IPX_PPROP_BROADCASTING,     "ipx_pprop_broadcasting" },
+        /* NET_IPX_FORWARDING unused */
+        {}
+};
+
+static const struct bin_table bin_net_atalk_table[] = {
+        { CTL_INT,      NET_ATALK_AARP_EXPIRY_TIME,             "aarp-expiry-time" },
+        { CTL_INT,      NET_ATALK_AARP_TICK_TIME,               "aarp-tick-time" },
+        { CTL_INT,      NET_ATALK_AARP_RETRANSMIT_LIMIT,        "aarp-retransmit-limit" },
+        { CTL_INT,      NET_ATALK_AARP_RESOLVE_TIME,            "aarp-resolve-time" },
+        {},
+};
+
+static const struct bin_table bin_net_netrom_table[] = {
+        { CTL_INT,      NET_NETROM_DEFAULT_PATH_QUALITY,                "default_path_quality" },
+        { CTL_INT,      NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER,      "obsolescence_count_initialiser" },
+        { CTL_INT,      NET_NETROM_NETWORK_TTL_INITIALISER,             "network_ttl_initialiser" },
+        { CTL_INT,      NET_NETROM_TRANSPORT_TIMEOUT,                   "transport_timeout" },
+        { CTL_INT,      NET_NETROM_TRANSPORT_MAXIMUM_TRIES,             "transport_maximum_tries" },
+        { CTL_INT,      NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY,         "transport_acknowledge_delay" },
+        { CTL_INT,      NET_NETROM_TRANSPORT_BUSY_DELAY,                "transport_busy_delay" },
+        { CTL_INT,      NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE,     "transport_requested_window_size" },
+        { CTL_INT,      NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT,       "transport_no_activity_timeout" },
+        { CTL_INT,      NET_NETROM_ROUTING_CONTROL,                     "routing_control" },
+        { CTL_INT,      NET_NETROM_LINK_FAILS_COUNT,                    "link_fails_count" },
+        { CTL_INT,      NET_NETROM_RESET,                               "reset" },
+        {}
+};
+
+static const struct bin_table bin_net_ax25_param_table[] = {
+        { CTL_INT,      NET_AX25_IP_DEFAULT_MODE,       "ip_default_mode" },
+        { CTL_INT,      NET_AX25_DEFAULT_MODE,          "ax25_default_mode" },
+        { CTL_INT,      NET_AX25_BACKOFF_TYPE,          "backoff_type" },
+        { CTL_INT,      NET_AX25_CONNECT_MODE,          "connect_mode" },
+        { CTL_INT,      NET_AX25_STANDARD_WINDOW,       "standard_window_size" },
+        { CTL_INT,      NET_AX25_EXTENDED_WINDOW,       "extended_window_size" },
+        { CTL_INT,      NET_AX25_T1_TIMEOUT,            "t1_timeout" },
+        { CTL_INT,      NET_AX25_T2_TIMEOUT,            "t2_timeout" },
+        { CTL_INT,      NET_AX25_T3_TIMEOUT,            "t3_timeout" },
+        { CTL_INT,      NET_AX25_IDLE_TIMEOUT,          "idle_timeout" },
+        { CTL_INT,      NET_AX25_N2,                    "maximum_retry_count" },
+        { CTL_INT,      NET_AX25_PACLEN,                "maximum_packet_length" },
+        { CTL_INT,      NET_AX25_PROTOCOL,              "protocol" },
+        { CTL_INT,      NET_AX25_DAMA_SLAVE_TIMEOUT,    "dama_slave_timeout" },
+        {}
+};
+
+static const struct bin_table bin_net_ax25_table[] = {
+        { CTL_DIR,      0, NULL, bin_net_ax25_param_table },
+        {}
+};
+
+static const struct bin_table bin_net_rose_table[] = {
+        { CTL_INT,      NET_ROSE_RESTART_REQUEST_TIMEOUT,       "restart_request_timeout" },
+        { CTL_INT,      NET_ROSE_CALL_REQUEST_TIMEOUT,          "call_request_timeout" },
+        { CTL_INT,      NET_ROSE_RESET_REQUEST_TIMEOUT,         "reset_request_timeout" },
+        { CTL_INT,      NET_ROSE_CLEAR_REQUEST_TIMEOUT,         "clear_request_timeout" },
+        { CTL_INT,      NET_ROSE_ACK_HOLD_BACK_TIMEOUT,         "acknowledge_hold_back_timeout" },
+        { CTL_INT,      NET_ROSE_ROUTING_CONTROL,               "routing_control" },
+        { CTL_INT,      NET_ROSE_LINK_FAIL_TIMEOUT,             "link_fail_timeout" },
+        { CTL_INT,      NET_ROSE_MAX_VCS,                       "maximum_virtual_circuits" },
+        { CTL_INT,      NET_ROSE_WINDOW_SIZE,                   "window_size" },
+        { CTL_INT,      NET_ROSE_NO_ACTIVITY_TIMEOUT,           "no_activity_timeout" },
+        {}
+};
+
+static const struct bin_table bin_net_ipv6_conf_var_table[] = {
+        { CTL_INT,      NET_IPV6_FORWARDING,                    "forwarding" },
+        { CTL_INT,      NET_IPV6_HOP_LIMIT,                     "hop_limit" },
+        { CTL_INT,      NET_IPV6_MTU,                           "mtu" },
+        { CTL_INT,      NET_IPV6_ACCEPT_RA,                     "accept_ra" },
+        { CTL_INT,      NET_IPV6_ACCEPT_REDIRECTS,              "accept_redirects" },
+        { CTL_INT,      NET_IPV6_AUTOCONF,                      "autoconf" },
+        { CTL_INT,      NET_IPV6_DAD_TRANSMITS,                 "dad_transmits" },
+        { CTL_INT,      NET_IPV6_RTR_SOLICITS,                  "router_solicitations" },
+        { CTL_INT,      NET_IPV6_RTR_SOLICIT_INTERVAL,          "router_solicitation_interval" },
+        { CTL_INT,      NET_IPV6_RTR_SOLICIT_DELAY,             "router_solicitation_delay" },
+        { CTL_INT,      NET_IPV6_USE_TEMPADDR,                  "use_tempaddr" },
+        { CTL_INT,      NET_IPV6_TEMP_VALID_LFT,                "temp_valid_lft" },
+        { CTL_INT,      NET_IPV6_TEMP_PREFERED_LFT,             "temp_prefered_lft" },
+        { CTL_INT,      NET_IPV6_REGEN_MAX_RETRY,               "regen_max_retry" },
+        { CTL_INT,      NET_IPV6_MAX_DESYNC_FACTOR,             "max_desync_factor" },
+        { CTL_INT,      NET_IPV6_MAX_ADDRESSES,                 "max_addresses" },
+        { CTL_INT,      NET_IPV6_FORCE_MLD_VERSION,             "force_mld_version" },
+        { CTL_INT,      NET_IPV6_ACCEPT_RA_DEFRTR,              "accept_ra_defrtr" },
+        { CTL_INT,      NET_IPV6_ACCEPT_RA_PINFO,               "accept_ra_pinfo" },
+        { CTL_INT,      NET_IPV6_ACCEPT_RA_RTR_PREF,            "accept_ra_rtr_pref" },
+        { CTL_INT,      NET_IPV6_RTR_PROBE_INTERVAL,            "router_probe_interval" },
+        { CTL_INT,      NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,    "accept_ra_rt_info_max_plen" },
+        { CTL_INT,      NET_IPV6_PROXY_NDP,                     "proxy_ndp" },
+        { CTL_INT,      NET_IPV6_ACCEPT_SOURCE_ROUTE,           "accept_source_route" },
+        {}
+};
+
+static const struct bin_table bin_net_ipv6_conf_table[] = {
+        { CTL_DIR,      NET_PROTO_CONF_ALL,             "all",  bin_net_ipv6_conf_var_table },
+        { CTL_DIR,      NET_PROTO_CONF_DEFAULT,         "default", bin_net_ipv6_conf_var_table },
+        { CTL_DIR,      0, NULL, bin_net_ipv6_conf_var_table },
+        {}
+};
+
+static const struct bin_table bin_net_ipv6_route_table[] = {
+        /* NET_IPV6_ROUTE_FLUSH "flush"  no longer used */
+        { CTL_INT,      NET_IPV6_ROUTE_GC_THRESH,               "gc_thresh" },
+        { CTL_INT,      NET_IPV6_ROUTE_MAX_SIZE,                "max_size" },
+        { CTL_INT,      NET_IPV6_ROUTE_GC_MIN_INTERVAL,         "gc_min_interval" },
+        { CTL_INT,      NET_IPV6_ROUTE_GC_TIMEOUT,              "gc_timeout" },
+        { CTL_INT,      NET_IPV6_ROUTE_GC_INTERVAL,             "gc_interval" },
+        { CTL_INT,      NET_IPV6_ROUTE_GC_ELASTICITY,           "gc_elasticity" },
+        { CTL_INT,      NET_IPV6_ROUTE_MTU_EXPIRES,             "mtu_expires" },
+        { CTL_INT,      NET_IPV6_ROUTE_MIN_ADVMSS,              "min_adv_mss" },
+        { CTL_INT,      NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS,      "gc_min_interval_ms" },
+        {}
+};
+
+static const struct bin_table bin_net_ipv6_icmp_table[] = {
+        { CTL_INT,      NET_IPV6_ICMP_RATELIMIT,        "ratelimit" },
+        {}
+};
+
+static const struct bin_table bin_net_ipv6_table[] = {
+        { CTL_DIR,      NET_IPV6_CONF,          "conf",         bin_net_ipv6_conf_table },
+        { CTL_DIR,      NET_IPV6_NEIGH,         "neigh",        bin_net_neigh_table },
+        { CTL_DIR,      NET_IPV6_ROUTE,         "route",        bin_net_ipv6_route_table },
+        { CTL_DIR,      NET_IPV6_ICMP,          "icmp",         bin_net_ipv6_icmp_table },
+        { CTL_INT,      NET_IPV6_BINDV6ONLY,            "bindv6only" },
+        { CTL_INT,      NET_IPV6_IP6FRAG_HIGH_THRESH,   "ip6frag_high_thresh" },
+        { CTL_INT,      NET_IPV6_IP6FRAG_LOW_THRESH,    "ip6frag_low_thresh" },
+        { CTL_INT,      NET_IPV6_IP6FRAG_TIME,          "ip6frag_time" },
+        { CTL_INT,      NET_IPV6_IP6FRAG_SECRET_INTERVAL,       "ip6frag_secret_interval" },
+        { CTL_INT,      NET_IPV6_MLD_MAX_MSF,           "mld_max_msf" },
+        { CTL_INT,      2088 /* IPQ_QMAX */,            "ip6_queue_maxlen" },
+        {}
+};
+
+static const struct bin_table bin_net_x25_table[] = {
+        { CTL_INT,      NET_X25_RESTART_REQUEST_TIMEOUT,        "restart_request_timeout" },
+        { CTL_INT,      NET_X25_CALL_REQUEST_TIMEOUT,           "call_request_timeout" },
+        { CTL_INT,      NET_X25_RESET_REQUEST_TIMEOUT,  "reset_request_timeout" },
+        { CTL_INT,      NET_X25_CLEAR_REQUEST_TIMEOUT,  "clear_request_timeout" },
+        { CTL_INT,      NET_X25_ACK_HOLD_BACK_TIMEOUT,  "acknowledgement_hold_back_timeout" },
+        { CTL_INT,      NET_X25_FORWARD,                        "x25_forward" },
+        {}
+};
+
+static const struct bin_table bin_net_tr_table[] = {
+        { CTL_INT,      NET_TR_RIF_TIMEOUT,     "rif_timeout" },
+        {}
+};
+
+
+static const struct bin_table bin_net_decnet_conf_vars[] = {
+        { CTL_INT,      NET_DECNET_CONF_DEV_FORWARDING, "forwarding" },
+        { CTL_INT,      NET_DECNET_CONF_DEV_PRIORITY,   "priority" },
+        { CTL_INT,      NET_DECNET_CONF_DEV_T2,         "t2" },
+        { CTL_INT,      NET_DECNET_CONF_DEV_T3,         "t3" },
+        {}
+};
+
+static const struct bin_table bin_net_decnet_conf[] = {
+        { CTL_DIR, NET_DECNET_CONF_ETHER,    "ethernet", bin_net_decnet_conf_vars },
+        { CTL_DIR, NET_DECNET_CONF_GRE,      "ipgre",    bin_net_decnet_conf_vars },
+        { CTL_DIR, NET_DECNET_CONF_X25,      "x25",      bin_net_decnet_conf_vars },
+        { CTL_DIR, NET_DECNET_CONF_PPP,      "ppp",      bin_net_decnet_conf_vars },
+        { CTL_DIR, NET_DECNET_CONF_DDCMP,    "ddcmp",    bin_net_decnet_conf_vars },
+        { CTL_DIR, NET_DECNET_CONF_LOOPBACK, "loopback", bin_net_decnet_conf_vars },
+        { CTL_DIR, 0,                        NULL,       bin_net_decnet_conf_vars },
+        {}
+};
+
+static const struct bin_table bin_net_decnet_table[] = {
+        { CTL_DIR,      NET_DECNET_CONF,                "conf", bin_net_decnet_conf },
+        { CTL_DNADR,    NET_DECNET_NODE_ADDRESS,        "node_address" },
+        { CTL_STR,      NET_DECNET_NODE_NAME,           "node_name" },
+        { CTL_STR,      NET_DECNET_DEFAULT_DEVICE,      "default_device" },
+        { CTL_INT,      NET_DECNET_TIME_WAIT,           "time_wait" },
+        { CTL_INT,      NET_DECNET_DN_COUNT,            "dn_count" },
+        { CTL_INT,      NET_DECNET_DI_COUNT,            "di_count" },
+        { CTL_INT,      NET_DECNET_DR_COUNT,            "dr_count" },
+        { CTL_INT,      NET_DECNET_DST_GC_INTERVAL,     "dst_gc_interval" },
+        { CTL_INT,      NET_DECNET_NO_FC_MAX_CWND,      "no_fc_max_cwnd" },
+        { CTL_INT,      NET_DECNET_MEM,         "decnet_mem" },
+        { CTL_INT,      NET_DECNET_RMEM,                "decnet_rmem" },
+        { CTL_INT,      NET_DECNET_WMEM,                "decnet_wmem" },
+        { CTL_INT,      NET_DECNET_DEBUG_LEVEL, "debug" },
+        {}
+};
+
+static const struct bin_table bin_net_sctp_table[] = {
+        { CTL_INT,      NET_SCTP_RTO_INITIAL,           "rto_initial" },
+        { CTL_INT,      NET_SCTP_RTO_MIN,               "rto_min" },
+        { CTL_INT,      NET_SCTP_RTO_MAX,               "rto_max" },
+        { CTL_INT,      NET_SCTP_RTO_ALPHA,             "rto_alpha_exp_divisor" },
+        { CTL_INT,      NET_SCTP_RTO_BETA,              "rto_beta_exp_divisor" },
+        { CTL_INT,      NET_SCTP_VALID_COOKIE_LIFE,     "valid_cookie_life" },
+        { CTL_INT,      NET_SCTP_ASSOCIATION_MAX_RETRANS,       "association_max_retrans" },
+        { CTL_INT,      NET_SCTP_PATH_MAX_RETRANS,      "path_max_retrans" },
+        { CTL_INT,      NET_SCTP_MAX_INIT_RETRANSMITS,  "max_init_retransmits" },
+        { CTL_INT,      NET_SCTP_HB_INTERVAL,           "hb_interval" },
+        { CTL_INT,      NET_SCTP_PRESERVE_ENABLE,       "cookie_preserve_enable" },
+        { CTL_INT,      NET_SCTP_MAX_BURST,             "max_burst" },
+        { CTL_INT,      NET_SCTP_ADDIP_ENABLE,          "addip_enable" },
+        { CTL_INT,      NET_SCTP_PRSCTP_ENABLE,         "prsctp_enable" },
+        { CTL_INT,      NET_SCTP_SNDBUF_POLICY,         "sndbuf_policy" },
+        { CTL_INT,      NET_SCTP_SACK_TIMEOUT,          "sack_timeout" },
+        { CTL_INT,      NET_SCTP_RCVBUF_POLICY,         "rcvbuf_policy" },
+        {}
+};
+
+static const struct bin_table bin_net_llc_llc2_timeout_table[] = {
+        { CTL_INT,      NET_LLC2_ACK_TIMEOUT,   "ack" },
+        { CTL_INT,      NET_LLC2_P_TIMEOUT,     "p" },
+        { CTL_INT,      NET_LLC2_REJ_TIMEOUT,   "rej" },
+        { CTL_INT,      NET_LLC2_BUSY_TIMEOUT,  "busy" },
+        {}
+};
+
+static const struct bin_table bin_net_llc_station_table[] = {
+        { CTL_INT,      NET_LLC_STATION_ACK_TIMEOUT,    "ack_timeout" },
+        {}
+};
+
+static const struct bin_table bin_net_llc_llc2_table[] = {
+        { CTL_DIR,      NET_LLC2,               "timeout",      bin_net_llc_llc2_timeout_table },
+        {}
+};
+
+static const struct bin_table bin_net_llc_table[] = {
+        { CTL_DIR,      NET_LLC2,               "llc2",         bin_net_llc_llc2_table },
+        { CTL_DIR,      NET_LLC_STATION,        "station",      bin_net_llc_station_table },
+        {}
+};
+
+static const struct bin_table bin_net_netfilter_table[] = {
+        { CTL_INT,      NET_NF_CONNTRACK_MAX,                   "nf_conntrack_max" },
+        /* NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT "nf_conntrack_tcp_timeout_syn_sent" no longer used */
+        /* NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV "nf_conntrack_tcp_timeout_syn_recv" no longer used */
+        /* NET_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED "nf_conntrack_tcp_timeout_established" no longer used */
+        /* NET_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT "nf_conntrack_tcp_timeout_fin_wait" no longer used */
+        /* NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT "nf_conntrack_tcp_timeout_close_wait" no longer used */
+        /* NET_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK "nf_conntrack_tcp_timeout_last_ack" no longer used */
+        /* NET_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT "nf_conntrack_tcp_timeout_time_wait" no longer used */
+        /* NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE "nf_conntrack_tcp_timeout_close" no longer used */
+        /* NET_NF_CONNTRACK_UDP_TIMEOUT "nf_conntrack_udp_timeout" no longer used */
+        /* NET_NF_CONNTRACK_UDP_TIMEOUT_STREAM "nf_conntrack_udp_timeout_stream" no longer used */
+        /* NET_NF_CONNTRACK_ICMP_TIMEOUT "nf_conntrack_icmp_timeout" no longer used */
+        /* NET_NF_CONNTRACK_GENERIC_TIMEOUT "nf_conntrack_generic_timeout" no longer used */
+        { CTL_INT,      NET_NF_CONNTRACK_BUCKETS,               "nf_conntrack_buckets" },
+        { CTL_INT,      NET_NF_CONNTRACK_LOG_INVALID,           "nf_conntrack_log_invalid" },
+        /* NET_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS "nf_conntrack_tcp_timeout_max_retrans" no longer used */
+        { CTL_INT,      NET_NF_CONNTRACK_TCP_LOOSE,             "nf_conntrack_tcp_loose" },
+        { CTL_INT,      NET_NF_CONNTRACK_TCP_BE_LIBERAL,        "nf_conntrack_tcp_be_liberal" },
+        { CTL_INT,      NET_NF_CONNTRACK_TCP_MAX_RETRANS,       "nf_conntrack_tcp_max_retrans" },
+        /* NET_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED "nf_conntrack_sctp_timeout_closed" no longer used */
+        /* NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT "nf_conntrack_sctp_timeout_cookie_wait" no longer used */
+        /* NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED "nf_conntrack_sctp_timeout_cookie_echoed" no longer used */
+        /* NET_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED "nf_conntrack_sctp_timeout_established" no longer used */
+        /* NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT "nf_conntrack_sctp_timeout_shutdown_sent" no longer used */
+        /* NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD "nf_conntrack_sctp_timeout_shutdown_recd" no longer used */
+        /* NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT "nf_conntrack_sctp_timeout_shutdown_ack_sent" no longer used */
+        { CTL_INT,      NET_NF_CONNTRACK_COUNT,                 "nf_conntrack_count" },
+        /* NET_NF_CONNTRACK_ICMPV6_TIMEOUT "nf_conntrack_icmpv6_timeout" no longer used */
+        /* NET_NF_CONNTRACK_FRAG6_TIMEOUT "nf_conntrack_frag6_timeout" no longer used */
+        { CTL_INT,      NET_NF_CONNTRACK_FRAG6_LOW_THRESH,      "nf_conntrack_frag6_low_thresh" },
+        { CTL_INT,      NET_NF_CONNTRACK_FRAG6_HIGH_THRESH,     "nf_conntrack_frag6_high_thresh" },
+        { CTL_INT,      NET_NF_CONNTRACK_CHECKSUM,              "nf_conntrack_checksum" },
+
+        {}
+};
+
+static const struct bin_table bin_net_irda_table[] = {
+        { CTL_INT,      NET_IRDA_DISCOVERY,             "discovery" },
+        { CTL_STR,      NET_IRDA_DEVNAME,               "devname" },
+        { CTL_INT,      NET_IRDA_DEBUG,                 "debug" },
+        { CTL_INT,      NET_IRDA_FAST_POLL,             "fast_poll_increase" },
+        { CTL_INT,      NET_IRDA_DISCOVERY_SLOTS,       "discovery_slots" },
+        { CTL_INT,      NET_IRDA_DISCOVERY_TIMEOUT,     "discovery_timeout" },
+        { CTL_INT,      NET_IRDA_SLOT_TIMEOUT,          "slot_timeout" },
+        { CTL_INT,      NET_IRDA_MAX_BAUD_RATE,         "max_baud_rate" },
+        { CTL_INT,      NET_IRDA_MIN_TX_TURN_TIME,      "min_tx_turn_time" },
+        { CTL_INT,      NET_IRDA_MAX_TX_DATA_SIZE,      "max_tx_data_size" },
+        { CTL_INT,      NET_IRDA_MAX_TX_WINDOW,         "max_tx_window" },
+        { CTL_INT,      NET_IRDA_MAX_NOREPLY_TIME,      "max_noreply_time" },
+        { CTL_INT,      NET_IRDA_WARN_NOREPLY_TIME,     "warn_noreply_time" },
+        { CTL_INT,      NET_IRDA_LAP_KEEPALIVE_TIME,    "lap_keepalive_time" },
+        {}
+};
+
+static const struct bin_table bin_net_table[] = {
+        { CTL_DIR,      NET_CORE,               "core",         bin_net_core_table },
+        /* NET_ETHER not used */
+        /* NET_802 not used */
+        { CTL_DIR,      NET_UNIX,               "unix",         bin_net_unix_table },
+        { CTL_DIR,      NET_IPV4,               "ipv4",         bin_net_ipv4_table },
+        { CTL_DIR,      NET_IPX,                "ipx",          bin_net_ipx_table },
+        { CTL_DIR,      NET_ATALK,              "appletalk",    bin_net_atalk_table },
+        { CTL_DIR,      NET_NETROM,             "netrom",       bin_net_netrom_table },
+        { CTL_DIR,      NET_AX25,               "ax25",         bin_net_ax25_table },
+        /*  NET_BRIDGE "bridge" no longer used */
+        { CTL_DIR,      NET_ROSE,               "rose",         bin_net_rose_table },
+        { CTL_DIR,      NET_IPV6,               "ipv6",         bin_net_ipv6_table },
+        { CTL_DIR,      NET_X25,                "x25",          bin_net_x25_table },
+        { CTL_DIR,      NET_TR,                 "token-ring",   bin_net_tr_table },
+        { CTL_DIR,      NET_DECNET,             "decnet",       bin_net_decnet_table },
+        /*  NET_ECONET not used */
+        { CTL_DIR,      NET_SCTP,               "sctp",         bin_net_sctp_table },
+        { CTL_DIR,      NET_LLC,                "llc",          bin_net_llc_table },
+        { CTL_DIR,      NET_NETFILTER,          "netfilter",    bin_net_netfilter_table },
+        /* NET_DCCP "dccp" no longer used */
+        { CTL_DIR,      NET_IRDA,               "irda",         bin_net_irda_table },
+        { CTL_INT,      2089,                   "nf_conntrack_max" },
+        {}
+};
+
+static const struct bin_table bin_fs_quota_table[] = {
+        { CTL_INT,      FS_DQ_LOOKUPS,          "lookups" },
+        { CTL_INT,      FS_DQ_DROPS,            "drops" },
+        { CTL_INT,      FS_DQ_READS,            "reads" },
+        { CTL_INT,      FS_DQ_WRITES,           "writes" },
+        { CTL_INT,      FS_DQ_CACHE_HITS,       "cache_hits" },
+        { CTL_INT,      FS_DQ_ALLOCATED,        "allocated_dquots" },
+        { CTL_INT,      FS_DQ_FREE,             "free_dquots" },
+        { CTL_INT,      FS_DQ_SYNCS,            "syncs" },
+        { CTL_INT,      FS_DQ_WARNINGS,         "warnings" },
+        {}
+};
+
+static const struct bin_table bin_fs_xfs_table[] = {
+        { CTL_INT,      XFS_SGID_INHERIT,       "irix_sgid_inherit" },
+        { CTL_INT,      XFS_SYMLINK_MODE,       "irix_symlink_mode" },
+        { CTL_INT,      XFS_PANIC_MASK,         "panic_mask" },
+
+        { CTL_INT,      XFS_ERRLEVEL,           "error_level" },
+        { CTL_INT,      XFS_SYNCD_TIMER,        "xfssyncd_centisecs" },
+        { CTL_INT,      XFS_INHERIT_SYNC,       "inherit_sync" },
+        { CTL_INT,      XFS_INHERIT_NODUMP,     "inherit_nodump" },
+        { CTL_INT,      XFS_INHERIT_NOATIME,    "inherit_noatime" },
+        { CTL_INT,      XFS_BUF_TIMER,          "xfsbufd_centisecs" },
+        { CTL_INT,      XFS_BUF_AGE,            "age_buffer_centisecs" },
+        { CTL_INT,      XFS_INHERIT_NOSYM,      "inherit_nosymlinks" },
+        { CTL_INT,      XFS_ROTORSTEP,  "rotorstep" },
+        { CTL_INT,      XFS_INHERIT_NODFRG,     "inherit_nodefrag" },
+        { CTL_INT,      XFS_FILESTREAM_TIMER,   "filestream_centisecs" },
+        { CTL_INT,      XFS_STATS_CLEAR,        "stats_clear" },
+        {}
+};
+
+static const struct bin_table bin_fs_ocfs2_nm_table[] = {
+        { CTL_STR,      1, "hb_ctl_path" },
+        {}
+};
+
+static const struct bin_table bin_fs_ocfs2_table[] = {
+        { CTL_DIR,      1,      "nm",   bin_fs_ocfs2_nm_table },
+        {}
+};
+
+static const struct bin_table bin_inotify_table[] = {
+        { CTL_INT,      INOTIFY_MAX_USER_INSTANCES,     "max_user_instances" },
+        { CTL_INT,      INOTIFY_MAX_USER_WATCHES,       "max_user_watches" },
+        { CTL_INT,      INOTIFY_MAX_QUEUED_EVENTS,      "max_queued_events" },
+        {}
+};
+
+static const struct bin_table bin_fs_table[] = {
+        { CTL_INT,      FS_NRINODE,             "inode-nr" },
+        { CTL_INT,      FS_STATINODE,           "inode-state" },
+        /* FS_MAXINODE unused */
+        /* FS_NRDQUOT unused */
+        /* FS_MAXDQUOT unused */
+        /* FS_NRFILE "file-nr" no longer used */
+        { CTL_INT,      FS_MAXFILE,             "file-max" },
+        { CTL_INT,      FS_DENTRY,              "dentry-state" },
+        /* FS_NRSUPER unused */
+        /* FS_MAXUPSER unused */
+        { CTL_INT,      FS_OVERFLOWUID,         "overflowuid" },
+        { CTL_INT,      FS_OVERFLOWGID,         "overflowgid" },
+        { CTL_INT,      FS_LEASES,              "leases-enable" },
+        { CTL_INT,      FS_DIR_NOTIFY,          "dir-notify-enable" },
+        { CTL_INT,      FS_LEASE_TIME,          "lease-break-time" },
+        { CTL_DIR,      FS_DQSTATS,             "quota",        bin_fs_quota_table },
+        { CTL_DIR,      FS_XFS,                 "xfs",          bin_fs_xfs_table },
+        { CTL_ULONG,    FS_AIO_NR,              "aio-nr" },
+        { CTL_ULONG,    FS_AIO_MAX_NR,          "aio-max-nr" },
+        { CTL_DIR,      FS_INOTIFY,             "inotify",      bin_inotify_table },
+        { CTL_DIR,      FS_OCFS2,               "ocfs2",        bin_fs_ocfs2_table },
+        { CTL_INT,      KERN_SETUID_DUMPABLE,   "suid_dumpable" },
+        {}
+};
+
+static const struct bin_table bin_ipmi_table[] = {
+        { CTL_INT,      DEV_IPMI_POWEROFF_POWERCYCLE,   "poweroff_powercycle" },
+        {}
+};
+
+static const struct bin_table bin_mac_hid_files[] = {
+        /* DEV_MAC_HID_KEYBOARD_SENDS_LINUX_KEYCODES unused */
+        /* DEV_MAC_HID_KEYBOARD_LOCK_KEYCODES unused */
+        { CTL_INT,      DEV_MAC_HID_MOUSE_BUTTON_EMULATION,     "mouse_button_emulation" },
+        { CTL_INT,      DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE,      "mouse_button2_keycode" },
+        { CTL_INT,      DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE,      "mouse_button3_keycode" },
+        /* DEV_MAC_HID_ADB_MOUSE_SENDS_KEYCODES unused */
+        {}
+};
+
+static const struct bin_table bin_raid_table[] = {
+        { CTL_INT,      DEV_RAID_SPEED_LIMIT_MIN,       "speed_limit_min" },
+        { CTL_INT,      DEV_RAID_SPEED_LIMIT_MAX,       "speed_limit_max" },
+        {}
+};
+
+static const struct bin_table bin_scsi_table[] = {
+        { CTL_INT, DEV_SCSI_LOGGING_LEVEL, "logging_level" },
+        {}
+};
+
+static const struct bin_table bin_dev_table[] = {
+        /* DEV_CDROM    "cdrom" no longer used */
+        /* DEV_HWMON unused */
+        /* DEV_PARPORT  "parport" no longer used */
+        { CTL_DIR,      DEV_RAID,       "raid",         bin_raid_table },
+        { CTL_DIR,      DEV_MAC_HID,    "mac_hid",      bin_mac_hid_files },
+        { CTL_DIR,      DEV_SCSI,       "scsi",         bin_scsi_table },
+        { CTL_DIR,      DEV_IPMI,       "ipmi",         bin_ipmi_table },
+        {}
+};
+
+static const struct bin_table bin_bus_isa_table[] = {
+        { CTL_INT,      BUS_ISA_MEM_BASE,       "membase" },
+        { CTL_INT,      BUS_ISA_PORT_BASE,      "portbase" },
+        { CTL_INT,      BUS_ISA_PORT_SHIFT,     "portshift" },
+        {}
+};
+
+static const struct bin_table bin_bus_table[] = {
+        { CTL_DIR,      CTL_BUS_ISA,    "isa",  bin_bus_isa_table },
+        {}
+};
+
+
+static const struct bin_table bin_s390dbf_table[] = {
+        { CTL_INT,      5678 /* CTL_S390DBF_STOPPABLE */, "debug_stoppable" },
+        { CTL_INT,      5679 /* CTL_S390DBF_ACTIVE */,    "debug_active" },
+        {}
+};
+
+static const struct bin_table bin_sunrpc_table[] = {
+        /* CTL_RPCDEBUG "rpc_debug"  no longer used */
+        /* CTL_NFSDEBUG "nfs_debug"  no longer used */
+        /* CTL_NFSDDEBUG "nfsd_debug" no longer used  */
+        /* CTL_NLMDEBUG "nlm_debug" no longer used */
+
+        { CTL_INT,      CTL_SLOTTABLE_UDP,      "udp_slot_table_entries" },
+        { CTL_INT,      CTL_SLOTTABLE_TCP,      "tcp_slot_table_entries" },
+        { CTL_INT,      CTL_MIN_RESVPORT,       "min_resvport" },
+        { CTL_INT,      CTL_MAX_RESVPORT,       "max_resvport" },
+        {}
+};
+
+static const struct bin_table bin_pm_table[] = {
+        /* frv specific */
+        /* 1 == CTL_PM_SUSPEND  "suspend"  no longer used" */
+        { CTL_INT,      2 /* CTL_PM_CMODE */,           "cmode" },
+        { CTL_INT,      3 /* CTL_PM_P0 */,              "p0" },
+        { CTL_INT,      4 /* CTL_PM_CM */,              "cm" },
+        {}
+};
+
+static const struct bin_table bin_root_table[] = {
+        { CTL_DIR,      CTL_KERN,       "kernel",       bin_kern_table },
+        { CTL_DIR,      CTL_VM,         "vm",           bin_vm_table },
+        { CTL_DIR,      CTL_NET,        "net",          bin_net_table },
+        /* CTL_PROC not used */
+        { CTL_DIR,      CTL_FS,         "fs",           bin_fs_table },
+        /* CTL_DEBUG "debug" no longer used */
+        { CTL_DIR,      CTL_DEV,        "dev",          bin_dev_table },
+        { CTL_DIR,      CTL_BUS,        "bus",          bin_bus_table },
+        { CTL_DIR,      CTL_ABI,        "abi" },
+        /* CTL_CPU not used */
+        /* CTL_ARLAN "arlan" no longer used */
+        { CTL_DIR,      CTL_S390DBF,    "s390dbf",      bin_s390dbf_table },
+        { CTL_DIR,      CTL_SUNRPC,     "sunrpc",       bin_sunrpc_table },
+        { CTL_DIR,      CTL_PM,         "pm",           bin_pm_table },
+        {}
+};
+
+static ssize_t bin_dir(struct file *file,
+        void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
+{
+        return -ENOTDIR;
+}
+
+
+static ssize_t bin_string(struct file *file,
+        void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
+{
+        ssize_t result, copied = 0;
+
+        if (oldval && oldlen) {
+                char __user *lastp;
+                loff_t pos = 0;
+                int ch;
+
+                result = vfs_read(file, oldval, oldlen, &pos);
+                if (result < 0)
+                        goto out;
+
+                copied = result;
+                lastp = oldval + copied - 1;
+
+                result = -EFAULT;
+                if (get_user(ch, lastp))
+                        goto out;
+
+                /* Trim off the trailing newline */
+                if (ch == '\n') {
+                        result = -EFAULT;
+                        if (put_user('\0', lastp))
+                                goto out;
+                        copied -= 1;
+                }
+        }
+
+        if (newval && newlen) {
+                loff_t pos = 0;
+
+                result = vfs_write(file, newval, newlen, &pos);
+                if (result < 0)
+                        goto out;
+        }
+
+        result = copied;
+out:
+        return result;
+}
+
+static ssize_t bin_intvec(struct file *file,
+        void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
+{
+        mm_segment_t old_fs = get_fs();
+        ssize_t copied = 0;
+        char *buffer;
+        ssize_t result;
+
+        result = -ENOMEM;
+        buffer = kmalloc(BUFSZ, GFP_KERNEL);
+        if (!buffer)
+                goto out;
+
+        if (oldval && oldlen) {
+                unsigned __user *vec = oldval;
+                size_t length = oldlen / sizeof(*vec);
+                loff_t pos = 0;
+                char *str, *end;
+                int i;
+
+                set_fs(KERNEL_DS);
+                result = vfs_read(file, buffer, BUFSZ - 1, &pos);
+                set_fs(old_fs);
+                if (result < 0)
+                        goto out_kfree;
+
+                str = buffer;
+                end = str + result;
+                *end++ = '\0';
+                for (i = 0; i < length; i++) {
+                        unsigned long value;
+
+                        value = simple_strtoul(str, &str, 10);
+                        while (isspace(*str))
+                                str++;
+                        
+                        result = -EFAULT;
+                        if (put_user(value, vec + i))
+                                goto out_kfree;
+
+                        copied += sizeof(*vec);
+                        if (!isdigit(*str))
+                                break;
+                }
+        }
+
+        if (newval && newlen) {
+                unsigned __user *vec = newval;
+                size_t length = newlen / sizeof(*vec);
+                loff_t pos = 0;
+                char *str, *end;
+                int i;
+
+                str = buffer;
+                end = str + BUFSZ;
+                for (i = 0; i < length; i++) {
+                        unsigned long value;
+
+                        result = -EFAULT;
+                        if (get_user(value, vec + i))
+                                goto out_kfree;
+
+                        str += snprintf(str, end - str, "%lu\t", value);
+                }
+
+                set_fs(KERNEL_DS);
+                result = vfs_write(file, buffer, str - buffer, &pos);
+                set_fs(old_fs);
+                if (result < 0)
+                        goto out_kfree;
+        }
+        result = copied;
+out_kfree:
+        kfree(buffer);
+out:
+        return result;
+}
+
+static ssize_t bin_ulongvec(struct file *file,
+        void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
+{
+        mm_segment_t old_fs = get_fs();
+        ssize_t copied = 0;
+        char *buffer;
+        ssize_t result;
+
+        result = -ENOMEM;
+        buffer = kmalloc(BUFSZ, GFP_KERNEL);
+        if (!buffer)
+                goto out;
+
+        if (oldval && oldlen) {
+                unsigned long __user *vec = oldval;
+                size_t length = oldlen / sizeof(*vec);
+                loff_t pos = 0;
+                char *str, *end;
+                int i;
+
+                set_fs(KERNEL_DS);
+                result = vfs_read(file, buffer, BUFSZ - 1, &pos);
+                set_fs(old_fs);
+                if (result < 0)
+                        goto out_kfree;
+
+                str = buffer;
+                end = str + result;
+                *end++ = '\0';
+                for (i = 0; i < length; i++) {
+                        unsigned long value;
+
+                        value = simple_strtoul(str, &str, 10);
+                        while (isspace(*str))
+                                str++;
+                        
+                        result = -EFAULT;
+                        if (put_user(value, vec + i))
+                                goto out_kfree;
+
+                        copied += sizeof(*vec);
+                        if (!isdigit(*str))
+                                break;
+                }
+        }
+
+        if (newval && newlen) {
+                unsigned long __user *vec = newval;
+                size_t length = newlen / sizeof(*vec);
+                loff_t pos = 0;
+                char *str, *end;
+                int i;
+
+                str = buffer;
+                end = str + BUFSZ;
+                for (i = 0; i < length; i++) {
+                        unsigned long value;
+
+                        result = -EFAULT;
+                        if (get_user(value, vec + i))
+                                goto out_kfree;
+
+                        str += snprintf(str, end - str, "%lu\t", value);
+                }
+
+                set_fs(KERNEL_DS);
+                result = vfs_write(file, buffer, str - buffer, &pos);
+                set_fs(old_fs);
+                if (result < 0)
+                        goto out_kfree;
+        }
+        result = copied;
+out_kfree:
+        kfree(buffer);
+out:
+        return result;
+}
+
+static unsigned hex_value(int ch)
+{
+        return isdigit(ch) ? ch - '0' : ((ch | 0x20) - 'a') + 10;
+}
+
+static ssize_t bin_uuid(struct file *file,
+        void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
+{
+        mm_segment_t old_fs = get_fs();
+        ssize_t result, copied = 0;
+
+        /* Only supports reads */
+        if (oldval && oldlen) {
+                loff_t pos = 0;
+                char buf[40], *str = buf;
+                unsigned char uuid[16];
+                int i;
+
+                set_fs(KERNEL_DS);
+                result = vfs_read(file, buf, sizeof(buf) - 1, &pos);
+                set_fs(old_fs);
+                if (result < 0)
+                        goto out;
+
+                buf[result] = '\0';
+
+                /* Convert the uuid to from a string to binary */
+                for (i = 0; i < 16; i++) {
+                        result = -EIO;
+                        if (!isxdigit(str[0]) || !isxdigit(str[1]))
+                                goto out;
+
+                        uuid[i] = (hex_value(str[0]) << 4) | hex_value(str[1]);
+                        str += 2;
+                        if (*str == '-')
+                                str++;
+                }
+
+                if (oldlen > 16)
+                        oldlen = 16;
+
+                result = -EFAULT;
+                if (copy_to_user(oldval, uuid, oldlen))
+                        goto out;
+
+                copied = oldlen;
+        }
+        result = copied;
+out:
+        return result;
+}
+
+static ssize_t bin_dn_node_address(struct file *file,
+        void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
+{
+        mm_segment_t old_fs = get_fs();
+        ssize_t result, copied = 0;
+
+        if (oldval && oldlen) {
+                loff_t pos = 0;
+                char buf[15], *nodep;
+                unsigned long area, node;
+                __le16 dnaddr;
+
+                set_fs(KERNEL_DS);
+                result = vfs_read(file, buf, sizeof(buf) - 1, &pos);
+                set_fs(old_fs);
+                if (result < 0)
+                        goto out;
+
+                buf[result] = '\0';
+
+                /* Convert the decnet addresss to binary */
+                result = -EIO;
+                nodep = strchr(buf, '.') + 1;
+                if (!nodep)
+                        goto out;
+
+                area = simple_strtoul(buf, NULL, 10);
+                node = simple_strtoul(nodep, NULL, 10);
+
+                result = -EIO;
+                if ((area > 63)||(node > 1023))
+                        goto out;
+
+                dnaddr = cpu_to_le16((area << 10) | node);
+
+                result = -EFAULT;
+                if (put_user(dnaddr, (__le16 __user *)oldval))
+                        goto out;
+
+                copied = sizeof(dnaddr);
+        }
+
+        if (newval && newlen) {
+                loff_t pos = 0;
+                __le16 dnaddr;
+                char buf[15];
+                int len;
+
+                result = -EINVAL;
+                if (newlen != sizeof(dnaddr))
+                        goto out;
+
+                result = -EFAULT;
+                if (get_user(dnaddr, (__le16 __user *)newval))
+                        goto out;
+
+                len = snprintf(buf, sizeof(buf), "%hu.%hu",
+                                le16_to_cpu(dnaddr) >> 10,
+                                le16_to_cpu(dnaddr) & 0x3ff);
+
+                set_fs(KERNEL_DS);
+                result = vfs_write(file, buf, len, &pos);
+                set_fs(old_fs);
+                if (result < 0)
+                        goto out;
+        }
+
+        result = copied;
+out:
+        return result;
+}
+
+static const struct bin_table *get_sysctl(const int *name, int nlen, char *path)
+{
+        const struct bin_table *table = &bin_root_table[0];
+        int ctl_name;
+
+        /* The binary sysctl tables have a small maximum depth so
+         * there is no danger of overflowing our path as it PATH_MAX
+         * bytes long.
+         */
+        memcpy(path, "sys/", 4);
+        path += 4;
+
+repeat:
+        if (!nlen)
+                return ERR_PTR(-ENOTDIR);
+        ctl_name = *name;
+        name++;
+        nlen--;
+        for ( ; table->convert; table++) {
+                int len = 0;
+
+                /*
+                 * For a wild card entry map from ifindex to network
+                 * device name.
+                 */
+                if (!table->ctl_name) {
+#ifdef CONFIG_NET
+                        struct net *net = current->nsproxy->net_ns;
+                        struct net_device *dev;
+                        dev = dev_get_by_index(net, ctl_name);
+                        if (dev) {
+                                len = strlen(dev->name);
+                                memcpy(path, dev->name, len);
+                                dev_put(dev);
+                        }
+#endif
+                /* Use the well known sysctl number to proc name mapping */
+                } else if (ctl_name == table->ctl_name) {
+                        len = strlen(table->procname);
+                        memcpy(path, table->procname, len);
+                }
+                if (len) {
+                        path += len;
+                        if (table->child) {
+                                *path++ = '/';
+                                table = table->child;
+                                goto repeat;
+                        }
+                        *path = '\0';
+                        return table;
+                }
+        }
+        return ERR_PTR(-ENOTDIR);
+}
+
+static char *sysctl_getname(const int *name, int nlen, const struct bin_table **tablep)
+{
+        char *tmp, *result;
+
+        result = ERR_PTR(-ENOMEM);
+        tmp = __getname();
+        if (tmp) {
+                const struct bin_table *table = get_sysctl(name, nlen, tmp);
+                result = tmp;
+                *tablep = table;
+                if (IS_ERR(table)) {
+                        __putname(tmp);
+                        result = ERR_CAST(table);
+                }
+        }
+        return result;
+}
+
+static ssize_t binary_sysctl(const int *name, int nlen,
+        void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
+{
+        const struct bin_table *table = NULL;
+        struct nameidata nd;
+        struct vfsmount *mnt;
+        struct file *file;
+        ssize_t result;
+        char *pathname;
+        int flags;
+        int acc_mode, fmode;
+
+        pathname = sysctl_getname(name, nlen, &table);
+        result = PTR_ERR(pathname);
+        if (IS_ERR(pathname))
+                goto out;
+
+        /* How should the sysctl be accessed? */
+        if (oldval && oldlen && newval && newlen) {
+                flags = O_RDWR;
+                acc_mode = MAY_READ | MAY_WRITE;
+                fmode = FMODE_READ | FMODE_WRITE;
+        } else if (newval && newlen) {
+                flags = O_WRONLY;
+                acc_mode = MAY_WRITE;
+                fmode = FMODE_WRITE;
+        } else if (oldval && oldlen) {
+                flags = O_RDONLY;
+                acc_mode = MAY_READ;
+                fmode = FMODE_READ;
+        } else {
+                result = 0;
+                goto out_putname;
+        }
+
+        mnt = current->nsproxy->pid_ns->proc_mnt;
+        result = vfs_path_lookup(mnt->mnt_root, mnt, pathname, 0, &nd);
+        if (result)
+                goto out_putname;
+
+        result = may_open(&nd.path, acc_mode, fmode);
+        if (result)
+                goto out_putpath;
+
+        file = dentry_open(nd.path.dentry, nd.path.mnt, flags, current_cred());
+        result = PTR_ERR(file);
+        if (IS_ERR(file))
+                goto out_putname;
+
+        result = table->convert(file, oldval, oldlen, newval, newlen);
+
+        fput(file);
+out_putname:
+        putname(pathname);
+out:
+        return result;
+
+out_putpath:
+        path_put(&nd.path);
+        goto out_putname;
+}
+
+
+#else /* CONFIG_SYSCTL_SYSCALL */
+
+static ssize_t binary_sysctl(const int *name, int nlen,
+        void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
+{
+        return -ENOSYS;
+}
+
+#endif /* CONFIG_SYSCTL_SYSCALL */
+
+
+static void deprecated_sysctl_warning(const int *name, int nlen)
+{
+        int i;
+
+        /*
+         * CTL_KERN/KERN_VERSION is used by older glibc and cannot
+         * ever go away.
+         */
+        if (name[0] == CTL_KERN && name[1] == KERN_VERSION)
+                return;
+
+        if (printk_ratelimit()) {
+                printk(KERN_INFO
+                        "warning: process `%s' used the deprecated sysctl "
+                        "system call with ", current->comm);
+                for (i = 0; i < nlen; i++)
+                        printk("%d.", name[i]);
+                printk("\n");
+        }
+        return;
+}
+
+static ssize_t do_sysctl(int __user *args_name, int nlen,
+        void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
+{
+        int name[CTL_MAXNAME];
+        int i;
+
+        /* Check args->nlen. */
+        if (nlen < 0 || nlen > CTL_MAXNAME)
+                return -ENOTDIR;
+        /* Read in the sysctl name for simplicity */
+        for (i = 0; i < nlen; i++)
+                if (get_user(name[i], args_name + i))
+                        return -EFAULT;
+
+        deprecated_sysctl_warning(name, nlen);
+
+        return binary_sysctl(name, nlen, oldval, oldlen, newval, newlen);
+}
+
+SYSCALL_DEFINE1(sysctl, struct __sysctl_args __user *, args)
+{
+        struct __sysctl_args tmp;
+        size_t oldlen = 0;
+        ssize_t result;
+
+        if (copy_from_user(&tmp, args, sizeof(tmp)))
+                return -EFAULT;
+
+        if (tmp.oldval && !tmp.oldlenp)
+                return -EFAULT;
+
+        if (tmp.oldlenp && get_user(oldlen, tmp.oldlenp))
+                return -EFAULT;
+
+        result = do_sysctl(tmp.name, tmp.nlen, tmp.oldval, oldlen,
+                           tmp.newval, tmp.newlen);
+
+        if (result >= 0) {
+                oldlen = result;
+                result = 0;
+        }
+
+        if (tmp.oldlenp && put_user(oldlen, tmp.oldlenp))
+                return -EFAULT;
+
+        return result;
+}
+
+
+#ifdef CONFIG_COMPAT
+#include <asm/compat.h>
+
+struct compat_sysctl_args {
+        compat_uptr_t   name;
+        int             nlen;
+        compat_uptr_t   oldval;
+        compat_uptr_t   oldlenp;
+        compat_uptr_t   newval;
+        compat_size_t   newlen;
+        compat_ulong_t  __unused[4];
+};
+
+asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args)
+{
+        struct compat_sysctl_args tmp;
+        compat_size_t __user *compat_oldlenp;
+        size_t oldlen = 0;
+        ssize_t result;
+
+        if (copy_from_user(&tmp, args, sizeof(tmp)))
+                return -EFAULT;
+
+        if (tmp.oldval && !tmp.oldlenp)
+                return -EFAULT;
+
+        compat_oldlenp = compat_ptr(tmp.oldlenp);
+        if (compat_oldlenp && get_user(oldlen, compat_oldlenp))
+                return -EFAULT;
+
+        result = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
+                           compat_ptr(tmp.oldval), oldlen,
+                           compat_ptr(tmp.newval), tmp.newlen);
+
+        if (result >= 0) {
+                oldlen = result;
+                result = 0;
+        }
+
+        if (compat_oldlenp && put_user(oldlen, compat_oldlenp))
+                return -EFAULT;
+
+        return result;
+}
+
+#endif /* CONFIG_COMPAT */
diff --git a/kernel/sysctl_check.c b/kernel/sysctl_check.c
index b6e7aaea4604..04cdcf72c827 100644
--- a/kernel/sysctl_check.c
+++ b/kernel/sysctl_check.c
@@ -5,1239 +5,6 @@
 #include <linux/string.h>
 #include <net/ip_vs.h>
 
-struct trans_ctl_table {
-        int                     ctl_name;
-        const char              *procname;
-        const struct trans_ctl_table *child;
-};
-
-static const struct trans_ctl_table trans_random_table[] = {
-        { RANDOM_POOLSIZE,      "poolsize" },
-        { RANDOM_ENTROPY_COUNT, "entropy_avail" },
-        { RANDOM_READ_THRESH,   "read_wakeup_threshold" },
-        { RANDOM_WRITE_THRESH,  "write_wakeup_threshold" },
-        { RANDOM_BOOT_ID,       "boot_id" },
-        { RANDOM_UUID,          "uuid" },
-        {}
-};
-
-static const struct trans_ctl_table trans_pty_table[] = {
-        { PTY_MAX,              "max" },
-        { PTY_NR,               "nr" },
-        {}
-};
-
-static const struct trans_ctl_table trans_kern_table[] = {
-        { KERN_OSTYPE,                  "ostype" },
-        { KERN_OSRELEASE,               "osrelease" },
-        /* KERN_OSREV not used */
-        { KERN_VERSION,                 "version" },
-        /* KERN_SECUREMASK not used */
-        /* KERN_PROF not used */
-        { KERN_NODENAME,                "hostname" },
-        { KERN_DOMAINNAME,              "domainname" },
-
-        { KERN_PANIC,                   "panic" },
-        { KERN_REALROOTDEV,             "real-root-dev" },
-
-        { KERN_SPARC_REBOOT,            "reboot-cmd" },
-        { KERN_CTLALTDEL,               "ctrl-alt-del" },
-        { KERN_PRINTK,                  "printk" },
-
-        /* KERN_NAMETRANS not used */
-        /* KERN_PPC_HTABRECLAIM not used */
-        /* KERN_PPC_ZEROPAGED not used */
-        { KERN_PPC_POWERSAVE_NAP,       "powersave-nap" },
-
-        { KERN_MODPROBE,                "modprobe" },
-        { KERN_SG_BIG_BUFF,             "sg-big-buff" },
-        { KERN_ACCT,                    "acct" },
-        { KERN_PPC_L2CR,                "l2cr" },
-
-        /* KERN_RTSIGNR not used */
-        /* KERN_RTSIGMAX not used */
-
-        { KERN_SHMMAX,                  "shmmax" },
-        { KERN_MSGMAX,                  "msgmax" },
-        { KERN_MSGMNB,                  "msgmnb" },
-        /* KERN_MSGPOOL not used*/
-        { KERN_SYSRQ,                   "sysrq" },
-        { KERN_MAX_THREADS,             "threads-max" },
-        { KERN_RANDOM,                  "random",       trans_random_table },
-        { KERN_SHMALL,                  "shmall" },
-        { KERN_MSGMNI,                  "msgmni" },
-        { KERN_SEM,                     "sem" },
-        { KERN_SPARC_STOP_A,            "stop-a" },
-        { KERN_SHMMNI,                  "shmmni" },
-
-        { KERN_OVERFLOWUID,             "overflowuid" },
-        { KERN_OVERFLOWGID,             "overflowgid" },
-
-        { KERN_HOTPLUG,                 "hotplug", },
-        { KERN_IEEE_EMULATION_WARNINGS, "ieee_emulation_warnings" },
-
-        { KERN_S390_USER_DEBUG_LOGGING, "userprocess_debug" },
-        { KERN_CORE_USES_PID,           "core_uses_pid" },
-        { KERN_TAINTED,                 "tainted" },
-        { KERN_CADPID,                  "cad_pid" },
-        { KERN_PIDMAX,                  "pid_max" },
-        { KERN_CORE_PATTERN,            "core_pattern" },
-        { KERN_PANIC_ON_OOPS,           "panic_on_oops" },
-        { KERN_HPPA_PWRSW,              "soft-power" },
-        { KERN_HPPA_UNALIGNED,          "unaligned-trap" },
-
-        { KERN_PRINTK_RATELIMIT,        "printk_ratelimit" },
-        { KERN_PRINTK_RATELIMIT_BURST,  "printk_ratelimit_burst" },
-
-        { KERN_PTY,                     "pty",          trans_pty_table },
-        { KERN_NGROUPS_MAX,             "ngroups_max" },
-        { KERN_SPARC_SCONS_PWROFF,      "scons-poweroff" },
-        { KERN_HZ_TIMER,                "hz_timer" },
-        { KERN_UNKNOWN_NMI_PANIC,       "unknown_nmi_panic" },
-        { KERN_BOOTLOADER_TYPE,         "bootloader_type" },
-        { KERN_RANDOMIZE,               "randomize_va_space" },
-
-        { KERN_SPIN_RETRY,              "spin_retry" },
-        { KERN_ACPI_VIDEO_FLAGS,        "acpi_video_flags" },
-        { KERN_IA64_UNALIGNED,          "ignore-unaligned-usertrap" },
-        { KERN_COMPAT_LOG,              "compat-log" },
-        { KERN_MAX_LOCK_DEPTH,          "max_lock_depth" },
-        { KERN_NMI_WATCHDOG,            "nmi_watchdog" },
-        { KERN_PANIC_ON_NMI,            "panic_on_unrecovered_nmi" },
-        {}
-};
-
-static const struct trans_ctl_table trans_vm_table[] = {
-        { VM_OVERCOMMIT_MEMORY,         "overcommit_memory" },
-        { VM_PAGE_CLUSTER,              "page-cluster" },
-        { VM_DIRTY_BACKGROUND,          "dirty_background_ratio" },
-        { VM_DIRTY_RATIO,               "dirty_ratio" },
-        { VM_DIRTY_WB_CS,               "dirty_writeback_centisecs" },
-        { VM_DIRTY_EXPIRE_CS,           "dirty_expire_centisecs" },
-        { VM_NR_PDFLUSH_THREADS,        "nr_pdflush_threads" },
-        { VM_OVERCOMMIT_RATIO,          "overcommit_ratio" },
-        /* VM_PAGEBUF unused */
-        { VM_HUGETLB_PAGES,             "nr_hugepages" },
-        { VM_SWAPPINESS,                "swappiness" },
-        { VM_LOWMEM_RESERVE_RATIO,      "lowmem_reserve_ratio" },
-        { VM_MIN_FREE_KBYTES,           "min_free_kbytes" },
-        { VM_MAX_MAP_COUNT,             "max_map_count" },
-        { VM_LAPTOP_MODE,               "laptop_mode" },
-        { VM_BLOCK_DUMP,                "block_dump" },
-        { VM_HUGETLB_GROUP,             "hugetlb_shm_group" },
-        { VM_VFS_CACHE_PRESSURE,        "vfs_cache_pressure" },
-        { VM_LEGACY_VA_LAYOUT,          "legacy_va_layout" },
-        /* VM_SWAP_TOKEN_TIMEOUT unused */
-        { VM_DROP_PAGECACHE,            "drop_caches" },
-        { VM_PERCPU_PAGELIST_FRACTION,  "percpu_pagelist_fraction" },
-        { VM_ZONE_RECLAIM_MODE,         "zone_reclaim_mode" },
-        { VM_MIN_UNMAPPED,              "min_unmapped_ratio" },
-        { VM_PANIC_ON_OOM,              "panic_on_oom" },
-        { VM_VDSO_ENABLED,              "vdso_enabled" },
-        { VM_MIN_SLAB,                  "min_slab_ratio" },
-
-        {}
-};
-
-static const struct trans_ctl_table trans_net_core_table[] = {
-        { NET_CORE_WMEM_MAX,            "wmem_max" },
-        { NET_CORE_RMEM_MAX,            "rmem_max" },
-        { NET_CORE_WMEM_DEFAULT,        "wmem_default" },
-        { NET_CORE_RMEM_DEFAULT,        "rmem_default" },
-        /* NET_CORE_DESTROY_DELAY unused */
-        { NET_CORE_MAX_BACKLOG,         "netdev_max_backlog" },
-        /* NET_CORE_FASTROUTE unused */
-        { NET_CORE_MSG_COST,            "message_cost" },
-        { NET_CORE_MSG_BURST,           "message_burst" },
-        { NET_CORE_OPTMEM_MAX,          "optmem_max" },
-        /* NET_CORE_HOT_LIST_LENGTH unused */
-        /* NET_CORE_DIVERT_VERSION unused */
-        /* NET_CORE_NO_CONG_THRESH unused */
-        /* NET_CORE_NO_CONG unused */
-        /* NET_CORE_LO_CONG unused */
-        /* NET_CORE_MOD_CONG unused */
-        { NET_CORE_DEV_WEIGHT,          "dev_weight" },
-        { NET_CORE_SOMAXCONN,           "somaxconn" },
-        { NET_CORE_BUDGET,              "netdev_budget" },
-        { NET_CORE_AEVENT_ETIME,        "xfrm_aevent_etime" },
-        { NET_CORE_AEVENT_RSEQTH,       "xfrm_aevent_rseqth" },
-        { NET_CORE_WARNINGS,            "warnings" },
-        {},
-};
-
-static const struct trans_ctl_table trans_net_unix_table[] = {
-        /* NET_UNIX_DESTROY_DELAY unused */
-        /* NET_UNIX_DELETE_DELAY unused */
-        { NET_UNIX_MAX_DGRAM_QLEN,      "max_dgram_qlen" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_ipv4_route_table[] = {
-        { NET_IPV4_ROUTE_FLUSH,                 "flush" },
-        { NET_IPV4_ROUTE_MIN_DELAY,             "min_delay" },
-        { NET_IPV4_ROUTE_MAX_DELAY,             "max_delay" },
-        { NET_IPV4_ROUTE_GC_THRESH,             "gc_thresh" },
-        { NET_IPV4_ROUTE_MAX_SIZE,              "max_size" },
-        { NET_IPV4_ROUTE_GC_MIN_INTERVAL,       "gc_min_interval" },
-        { NET_IPV4_ROUTE_GC_TIMEOUT,            "gc_timeout" },
-        { NET_IPV4_ROUTE_GC_INTERVAL,           "gc_interval" },
-        { NET_IPV4_ROUTE_REDIRECT_LOAD,         "redirect_load" },
-        { NET_IPV4_ROUTE_REDIRECT_NUMBER,       "redirect_number" },
-        { NET_IPV4_ROUTE_REDIRECT_SILENCE,      "redirect_silence" },
-        { NET_IPV4_ROUTE_ERROR_COST,            "error_cost" },
-        { NET_IPV4_ROUTE_ERROR_BURST,           "error_burst" },
-        { NET_IPV4_ROUTE_GC_ELASTICITY,         "gc_elasticity" },
-        { NET_IPV4_ROUTE_MTU_EXPIRES,           "mtu_expires" },
-        { NET_IPV4_ROUTE_MIN_PMTU,              "min_pmtu" },
-        { NET_IPV4_ROUTE_MIN_ADVMSS,            "min_adv_mss" },
-        { NET_IPV4_ROUTE_SECRET_INTERVAL,       "secret_interval" },
-        { NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS,    "gc_min_interval_ms" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_ipv4_conf_vars_table[] = {
-        { NET_IPV4_CONF_FORWARDING,             "forwarding" },
-        { NET_IPV4_CONF_MC_FORWARDING,          "mc_forwarding" },
-
-        { NET_IPV4_CONF_PROXY_ARP,              "proxy_arp" },
-        { NET_IPV4_CONF_ACCEPT_REDIRECTS,       "accept_redirects" },
-        { NET_IPV4_CONF_SECURE_REDIRECTS,       "secure_redirects" },
-        { NET_IPV4_CONF_SEND_REDIRECTS,         "send_redirects" },
-        { NET_IPV4_CONF_SHARED_MEDIA,           "shared_media" },
-        { NET_IPV4_CONF_RP_FILTER,              "rp_filter" },
-        { NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE,    "accept_source_route" },
-        { NET_IPV4_CONF_BOOTP_RELAY,            "bootp_relay" },
-        { NET_IPV4_CONF_LOG_MARTIANS,           "log_martians" },
-        { NET_IPV4_CONF_TAG,                    "tag" },
-        { NET_IPV4_CONF_ARPFILTER,              "arp_filter" },
-        { NET_IPV4_CONF_MEDIUM_ID,              "medium_id" },
-        { NET_IPV4_CONF_NOXFRM,                 "disable_xfrm" },
-        { NET_IPV4_CONF_NOPOLICY,               "disable_policy" },
-        { NET_IPV4_CONF_FORCE_IGMP_VERSION,     "force_igmp_version" },
-
-        { NET_IPV4_CONF_ARP_ANNOUNCE,           "arp_announce" },
-        { NET_IPV4_CONF_ARP_IGNORE,             "arp_ignore" },
-        { NET_IPV4_CONF_PROMOTE_SECONDARIES,    "promote_secondaries" },
-        { NET_IPV4_CONF_ARP_ACCEPT,             "arp_accept" },
-        { NET_IPV4_CONF_ARP_NOTIFY,             "arp_notify" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_ipv4_conf_table[] = {
-        { NET_PROTO_CONF_ALL,           "all",          trans_net_ipv4_conf_vars_table },
-        { NET_PROTO_CONF_DEFAULT,       "default",      trans_net_ipv4_conf_vars_table },
-        { 0, NULL, trans_net_ipv4_conf_vars_table },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_neigh_vars_table[] = {
-        { NET_NEIGH_MCAST_SOLICIT,      "mcast_solicit" },
-        { NET_NEIGH_UCAST_SOLICIT,      "ucast_solicit" },
-        { NET_NEIGH_APP_SOLICIT,        "app_solicit" },
-        { NET_NEIGH_RETRANS_TIME,       "retrans_time" },
-        { NET_NEIGH_REACHABLE_TIME,     "base_reachable_time" },
-        { NET_NEIGH_DELAY_PROBE_TIME,   "delay_first_probe_time" },
-        { NET_NEIGH_GC_STALE_TIME,      "gc_stale_time" },
-        { NET_NEIGH_UNRES_QLEN,         "unres_qlen" },
-        { NET_NEIGH_PROXY_QLEN,         "proxy_qlen" },
-        { NET_NEIGH_ANYCAST_DELAY,      "anycast_delay" },
-        { NET_NEIGH_PROXY_DELAY,        "proxy_delay" },
-        { NET_NEIGH_LOCKTIME,           "locktime" },
-        { NET_NEIGH_GC_INTERVAL,        "gc_interval" },
-        { NET_NEIGH_GC_THRESH1,         "gc_thresh1" },
-        { NET_NEIGH_GC_THRESH2,         "gc_thresh2" },
-        { NET_NEIGH_GC_THRESH3,         "gc_thresh3" },
-        { NET_NEIGH_RETRANS_TIME_MS,    "retrans_time_ms" },
-        { NET_NEIGH_REACHABLE_TIME_MS,  "base_reachable_time_ms" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_neigh_table[] = {
-        { NET_PROTO_CONF_DEFAULT, "default", trans_net_neigh_vars_table },
-        { 0, NULL, trans_net_neigh_vars_table },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_ipv4_netfilter_table[] = {
-        { NET_IPV4_NF_CONNTRACK_MAX,                            "ip_conntrack_max" },
-
-        { NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT,           "ip_conntrack_tcp_timeout_syn_sent" },
-        { NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV,           "ip_conntrack_tcp_timeout_syn_recv" },
-        { NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED,        "ip_conntrack_tcp_timeout_established" },
-        { NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT,           "ip_conntrack_tcp_timeout_fin_wait" },
-        { NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT,         "ip_conntrack_tcp_timeout_close_wait" },
-        { NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK,           "ip_conntrack_tcp_timeout_last_ack" },
-        { NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT,          "ip_conntrack_tcp_timeout_time_wait" },
-        { NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE,              "ip_conntrack_tcp_timeout_close" },
-
-        { NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT,                    "ip_conntrack_udp_timeout" },
-        { NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM,             "ip_conntrack_udp_timeout_stream" },
-        { NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT,                   "ip_conntrack_icmp_timeout" },
-        { NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT,                "ip_conntrack_generic_timeout" },
-
-        { NET_IPV4_NF_CONNTRACK_BUCKETS,                        "ip_conntrack_buckets" },
-        { NET_IPV4_NF_CONNTRACK_LOG_INVALID,                    "ip_conntrack_log_invalid" },
-        { NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS,        "ip_conntrack_tcp_timeout_max_retrans" },
-        { NET_IPV4_NF_CONNTRACK_TCP_LOOSE,                      "ip_conntrack_tcp_loose" },
-        { NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL,                 "ip_conntrack_tcp_be_liberal" },
-        { NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS,                "ip_conntrack_tcp_max_retrans" },
-
-        { NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED,            "ip_conntrack_sctp_timeout_closed" },
-        { NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT,       "ip_conntrack_sctp_timeout_cookie_wait" },
-        { NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED,     "ip_conntrack_sctp_timeout_cookie_echoed" },
-        { NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED,       "ip_conntrack_sctp_timeout_established" },
-        { NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT,     "ip_conntrack_sctp_timeout_shutdown_sent" },
-        { NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD,     "ip_conntrack_sctp_timeout_shutdown_recd" },
-        { NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT, "ip_conntrack_sctp_timeout_shutdown_ack_sent" },
-
-        { NET_IPV4_NF_CONNTRACK_COUNT,          "ip_conntrack_count" },
-        { NET_IPV4_NF_CONNTRACK_CHECKSUM,       "ip_conntrack_checksum" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_ipv4_table[] = {
-        { NET_IPV4_FORWARD,                     "ip_forward" },
-        { NET_IPV4_DYNADDR,                     "ip_dynaddr" },
-
-        { NET_IPV4_CONF,                "conf",         trans_net_ipv4_conf_table },
-        { NET_IPV4_NEIGH,               "neigh",        trans_net_neigh_table },
-        { NET_IPV4_ROUTE,               "route",        trans_net_ipv4_route_table },
-        /* NET_IPV4_FIB_HASH unused */
-        { NET_IPV4_NETFILTER,           "netfilter",    trans_net_ipv4_netfilter_table },
-
-        { NET_IPV4_TCP_TIMESTAMPS,              "tcp_timestamps" },
-        { NET_IPV4_TCP_WINDOW_SCALING,          "tcp_window_scaling" },
-        { NET_IPV4_TCP_SACK,                    "tcp_sack" },
-        { NET_IPV4_TCP_RETRANS_COLLAPSE,        "tcp_retrans_collapse" },
-        { NET_IPV4_DEFAULT_TTL,                 "ip_default_ttl" },
-        /* NET_IPV4_AUTOCONFIG unused */
-        { NET_IPV4_NO_PMTU_DISC,                "ip_no_pmtu_disc" },
-        { NET_IPV4_TCP_SYN_RETRIES,             "tcp_syn_retries" },
-        { NET_IPV4_IPFRAG_HIGH_THRESH,          "ipfrag_high_thresh" },
-        { NET_IPV4_IPFRAG_LOW_THRESH,           "ipfrag_low_thresh" },
-        { NET_IPV4_IPFRAG_TIME,                 "ipfrag_time" },
-        /* NET_IPV4_TCP_MAX_KA_PROBES unused */
-        { NET_IPV4_TCP_KEEPALIVE_TIME,          "tcp_keepalive_time" },
-        { NET_IPV4_TCP_KEEPALIVE_PROBES,        "tcp_keepalive_probes" },
-        { NET_IPV4_TCP_RETRIES1,                "tcp_retries1" },
-        { NET_IPV4_TCP_RETRIES2,                "tcp_retries2" },
-        { NET_IPV4_TCP_FIN_TIMEOUT,             "tcp_fin_timeout" },
-        /* NET_IPV4_IP_MASQ_DEBUG unused */
-        { NET_TCP_SYNCOOKIES,                   "tcp_syncookies" },
-        { NET_TCP_STDURG,                       "tcp_stdurg" },
-        { NET_TCP_RFC1337,                      "tcp_rfc1337" },
-        /* NET_TCP_SYN_TAILDROP unused */
-        { NET_TCP_MAX_SYN_BACKLOG,              "tcp_max_syn_backlog" },
-        { NET_IPV4_LOCAL_PORT_RANGE,            "ip_local_port_range" },
-        { NET_IPV4_ICMP_ECHO_IGNORE_ALL,        "icmp_echo_ignore_all" },
-        { NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS, "icmp_echo_ignore_broadcasts" },
-        /* NET_IPV4_ICMP_SOURCEQUENCH_RATE unused */
-        /* NET_IPV4_ICMP_DESTUNREACH_RATE unused */
-        /* NET_IPV4_ICMP_TIMEEXCEED_RATE unused */
-        /* NET_IPV4_ICMP_PARAMPROB_RATE unused */
-        /* NET_IPV4_ICMP_ECHOREPLY_RATE unused */
-        { NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES,   "icmp_ignore_bogus_error_responses" },
-        { NET_IPV4_IGMP_MAX_MEMBERSHIPS,        "igmp_max_memberships" },
-        { NET_TCP_TW_RECYCLE,                   "tcp_tw_recycle" },
-        /* NET_IPV4_ALWAYS_DEFRAG unused */
-        { NET_IPV4_TCP_KEEPALIVE_INTVL,         "tcp_keepalive_intvl" },
-        { NET_IPV4_INET_PEER_THRESHOLD,         "inet_peer_threshold" },
-        { NET_IPV4_INET_PEER_MINTTL,            "inet_peer_minttl" },
-        { NET_IPV4_INET_PEER_MAXTTL,            "inet_peer_maxttl" },
-        { NET_IPV4_INET_PEER_GC_MINTIME,        "inet_peer_gc_mintime" },
-        { NET_IPV4_INET_PEER_GC_MAXTIME,        "inet_peer_gc_maxtime" },
-        { NET_TCP_ORPHAN_RETRIES,               "tcp_orphan_retries" },
-        { NET_TCP_ABORT_ON_OVERFLOW,            "tcp_abort_on_overflow" },
-        { NET_TCP_SYNACK_RETRIES,               "tcp_synack_retries" },
-        { NET_TCP_MAX_ORPHANS,                  "tcp_max_orphans" },
-        { NET_TCP_MAX_TW_BUCKETS,               "tcp_max_tw_buckets" },
-        { NET_TCP_FACK,                         "tcp_fack" },
-        { NET_TCP_REORDERING,                   "tcp_reordering" },
-        { NET_TCP_ECN,                          "tcp_ecn" },
-        { NET_TCP_DSACK,                        "tcp_dsack" },
-        { NET_TCP_MEM,                          "tcp_mem" },
-        { NET_TCP_WMEM,                         "tcp_wmem" },
-        { NET_TCP_RMEM,                         "tcp_rmem" },
-        { NET_TCP_APP_WIN,                      "tcp_app_win" },
-        { NET_TCP_ADV_WIN_SCALE,                "tcp_adv_win_scale" },
-        { NET_IPV4_NONLOCAL_BIND,               "ip_nonlocal_bind" },
-        { NET_IPV4_ICMP_RATELIMIT,              "icmp_ratelimit" },
-        { NET_IPV4_ICMP_RATEMASK,               "icmp_ratemask" },
-        { NET_TCP_TW_REUSE,                     "tcp_tw_reuse" },
-        { NET_TCP_FRTO,                         "tcp_frto" },
-        { NET_TCP_LOW_LATENCY,                  "tcp_low_latency" },
-        { NET_IPV4_IPFRAG_SECRET_INTERVAL,      "ipfrag_secret_interval" },
-        { NET_IPV4_IGMP_MAX_MSF,                "igmp_max_msf" },
-        { NET_TCP_NO_METRICS_SAVE,              "tcp_no_metrics_save" },
-        /* NET_TCP_DEFAULT_WIN_SCALE unused */
-        { NET_TCP_MODERATE_RCVBUF,              "tcp_moderate_rcvbuf" },
-        { NET_TCP_TSO_WIN_DIVISOR,              "tcp_tso_win_divisor" },
-        /* NET_TCP_BIC_BETA unused */
-        { NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,      "icmp_errors_use_inbound_ifaddr" },
-        { NET_TCP_CONG_CONTROL,                 "tcp_congestion_control" },
-        { NET_TCP_ABC,                          "tcp_abc" },
-        { NET_IPV4_IPFRAG_MAX_DIST,             "ipfrag_max_dist" },
-        { NET_TCP_MTU_PROBING,                  "tcp_mtu_probing" },
-        { NET_TCP_BASE_MSS,                     "tcp_base_mss" },
-        { NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS,       "tcp_workaround_signed_windows" },
-        { NET_TCP_DMA_COPYBREAK,                "tcp_dma_copybreak" },
-        { NET_TCP_SLOW_START_AFTER_IDLE,        "tcp_slow_start_after_idle" },
-        { NET_CIPSOV4_CACHE_ENABLE,             "cipso_cache_enable" },
-        { NET_CIPSOV4_CACHE_BUCKET_SIZE,        "cipso_cache_bucket_size" },
-        { NET_CIPSOV4_RBM_OPTFMT,               "cipso_rbm_optfmt" },
-        { NET_CIPSOV4_RBM_STRICTVALID,          "cipso_rbm_strictvalid" },
-        { NET_TCP_AVAIL_CONG_CONTROL,           "tcp_available_congestion_control" },
-        { NET_TCP_ALLOWED_CONG_CONTROL,         "tcp_allowed_congestion_control" },
-        { NET_TCP_MAX_SSTHRESH,                 "tcp_max_ssthresh" },
-        { NET_TCP_FRTO_RESPONSE,                "tcp_frto_response" },
-        { 2088 /* NET_IPQ_QMAX */,              "ip_queue_maxlen" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_ipx_table[] = {
-        { NET_IPX_PPROP_BROADCASTING,   "ipx_pprop_broadcasting" },
-        /* NET_IPX_FORWARDING unused */
-        {}
-};
-
-static const struct trans_ctl_table trans_net_atalk_table[] = {
-        { NET_ATALK_AARP_EXPIRY_TIME,           "aarp-expiry-time" },
-        { NET_ATALK_AARP_TICK_TIME,             "aarp-tick-time" },
-        { NET_ATALK_AARP_RETRANSMIT_LIMIT,      "aarp-retransmit-limit" },
-        { NET_ATALK_AARP_RESOLVE_TIME,          "aarp-resolve-time" },
-        {},
-};
-
-static const struct trans_ctl_table trans_net_netrom_table[] = {
-        { NET_NETROM_DEFAULT_PATH_QUALITY,              "default_path_quality" },
-        { NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER,    "obsolescence_count_initialiser" },
-        { NET_NETROM_NETWORK_TTL_INITIALISER,           "network_ttl_initialiser" },
-        { NET_NETROM_TRANSPORT_TIMEOUT,                 "transport_timeout" },
-        { NET_NETROM_TRANSPORT_MAXIMUM_TRIES,           "transport_maximum_tries" },
-        { NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY,       "transport_acknowledge_delay" },
-        { NET_NETROM_TRANSPORT_BUSY_DELAY,              "transport_busy_delay" },
-        { NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE,   "transport_requested_window_size" },
-        { NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT,     "transport_no_activity_timeout" },
-        { NET_NETROM_ROUTING_CONTROL,                   "routing_control" },
-        { NET_NETROM_LINK_FAILS_COUNT,                  "link_fails_count" },
-        { NET_NETROM_RESET,                             "reset" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_ax25_param_table[] = {
-        { NET_AX25_IP_DEFAULT_MODE,     "ip_default_mode" },
-        { NET_AX25_DEFAULT_MODE,        "ax25_default_mode" },
-        { NET_AX25_BACKOFF_TYPE,        "backoff_type" },
-        { NET_AX25_CONNECT_MODE,        "connect_mode" },
-        { NET_AX25_STANDARD_WINDOW,     "standard_window_size" },
-        { NET_AX25_EXTENDED_WINDOW,     "extended_window_size" },
-        { NET_AX25_T1_TIMEOUT,          "t1_timeout" },
-        { NET_AX25_T2_TIMEOUT,          "t2_timeout" },
-        { NET_AX25_T3_TIMEOUT,          "t3_timeout" },
-        { NET_AX25_IDLE_TIMEOUT,        "idle_timeout" },
-        { NET_AX25_N2,                  "maximum_retry_count" },
-        { NET_AX25_PACLEN,              "maximum_packet_length" },
-        { NET_AX25_PROTOCOL,            "protocol" },
-        { NET_AX25_DAMA_SLAVE_TIMEOUT,  "dama_slave_timeout" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_ax25_table[] = {
-        { 0, NULL, trans_net_ax25_param_table },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_bridge_table[] = {
-        { NET_BRIDGE_NF_CALL_ARPTABLES,         "bridge-nf-call-arptables" },
-        { NET_BRIDGE_NF_CALL_IPTABLES,          "bridge-nf-call-iptables" },
-        { NET_BRIDGE_NF_CALL_IP6TABLES,         "bridge-nf-call-ip6tables" },
-        { NET_BRIDGE_NF_FILTER_VLAN_TAGGED,     "bridge-nf-filter-vlan-tagged" },
-        { NET_BRIDGE_NF_FILTER_PPPOE_TAGGED,    "bridge-nf-filter-pppoe-tagged" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_rose_table[] = {
-        { NET_ROSE_RESTART_REQUEST_TIMEOUT,     "restart_request_timeout" },
-        { NET_ROSE_CALL_REQUEST_TIMEOUT,        "call_request_timeout" },
-        { NET_ROSE_RESET_REQUEST_TIMEOUT,       "reset_request_timeout" },
-        { NET_ROSE_CLEAR_REQUEST_TIMEOUT,       "clear_request_timeout" },
-        { NET_ROSE_ACK_HOLD_BACK_TIMEOUT,       "acknowledge_hold_back_timeout" },
-        { NET_ROSE_ROUTING_CONTROL,             "routing_control" },
-        { NET_ROSE_LINK_FAIL_TIMEOUT,           "link_fail_timeout" },
-        { NET_ROSE_MAX_VCS,                     "maximum_virtual_circuits" },
-        { NET_ROSE_WINDOW_SIZE,                 "window_size" },
-        { NET_ROSE_NO_ACTIVITY_TIMEOUT,         "no_activity_timeout" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_ipv6_conf_var_table[] = {
-        { NET_IPV6_FORWARDING,                  "forwarding" },
-        { NET_IPV6_HOP_LIMIT,                   "hop_limit" },
-        { NET_IPV6_MTU,                         "mtu" },
-        { NET_IPV6_ACCEPT_RA,                   "accept_ra" },
-        { NET_IPV6_ACCEPT_REDIRECTS,            "accept_redirects" },
-        { NET_IPV6_AUTOCONF,                    "autoconf" },
-        { NET_IPV6_DAD_TRANSMITS,               "dad_transmits" },
-        { NET_IPV6_RTR_SOLICITS,                "router_solicitations" },
-        { NET_IPV6_RTR_SOLICIT_INTERVAL,        "router_solicitation_interval" },
-        { NET_IPV6_RTR_SOLICIT_DELAY,           "router_solicitation_delay" },
-        { NET_IPV6_USE_TEMPADDR,                "use_tempaddr" },
-        { NET_IPV6_TEMP_VALID_LFT,              "temp_valid_lft" },
-        { NET_IPV6_TEMP_PREFERED_LFT,           "temp_prefered_lft" },
-        { NET_IPV6_REGEN_MAX_RETRY,             "regen_max_retry" },
-        { NET_IPV6_MAX_DESYNC_FACTOR,           "max_desync_factor" },
-        { NET_IPV6_MAX_ADDRESSES,               "max_addresses" },
-        { NET_IPV6_FORCE_MLD_VERSION,           "force_mld_version" },
-        { NET_IPV6_ACCEPT_RA_DEFRTR,            "accept_ra_defrtr" },
-        { NET_IPV6_ACCEPT_RA_PINFO,             "accept_ra_pinfo" },
-        { NET_IPV6_ACCEPT_RA_RTR_PREF,          "accept_ra_rtr_pref" },
-        { NET_IPV6_RTR_PROBE_INTERVAL,          "router_probe_interval" },
-        { NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,  "accept_ra_rt_info_max_plen" },
-        { NET_IPV6_PROXY_NDP,                   "proxy_ndp" },
-        { NET_IPV6_ACCEPT_SOURCE_ROUTE,         "accept_source_route" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_ipv6_conf_table[] = {
-        { NET_PROTO_CONF_ALL,           "all",  trans_net_ipv6_conf_var_table },
-        { NET_PROTO_CONF_DEFAULT,       "default", trans_net_ipv6_conf_var_table },
-        { 0, NULL, trans_net_ipv6_conf_var_table },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_ipv6_route_table[] = {
-        { NET_IPV6_ROUTE_FLUSH,                 "flush" },
-        { NET_IPV6_ROUTE_GC_THRESH,             "gc_thresh" },
-        { NET_IPV6_ROUTE_MAX_SIZE,              "max_size" },
-        { NET_IPV6_ROUTE_GC_MIN_INTERVAL,       "gc_min_interval" },
-        { NET_IPV6_ROUTE_GC_TIMEOUT,            "gc_timeout" },
-        { NET_IPV6_ROUTE_GC_INTERVAL,           "gc_interval" },
-        { NET_IPV6_ROUTE_GC_ELASTICITY,         "gc_elasticity" },
-        { NET_IPV6_ROUTE_MTU_EXPIRES,           "mtu_expires" },
-        { NET_IPV6_ROUTE_MIN_ADVMSS,            "min_adv_mss" },
-        { NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS,    "gc_min_interval_ms" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_ipv6_icmp_table[] = {
-        { NET_IPV6_ICMP_RATELIMIT,      "ratelimit" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_ipv6_table[] = {
-        { NET_IPV6_CONF,                "conf",         trans_net_ipv6_conf_table },
-        { NET_IPV6_NEIGH,               "neigh",        trans_net_neigh_table },
-        { NET_IPV6_ROUTE,               "route",        trans_net_ipv6_route_table },
-        { NET_IPV6_ICMP,                "icmp",         trans_net_ipv6_icmp_table },
-        { NET_IPV6_BINDV6ONLY,          "bindv6only" },
-        { NET_IPV6_IP6FRAG_HIGH_THRESH, "ip6frag_high_thresh" },
-        { NET_IPV6_IP6FRAG_LOW_THRESH,  "ip6frag_low_thresh" },
-        { NET_IPV6_IP6FRAG_TIME,        "ip6frag_time" },
-        { NET_IPV6_IP6FRAG_SECRET_INTERVAL,     "ip6frag_secret_interval" },
-        { NET_IPV6_MLD_MAX_MSF,         "mld_max_msf" },
-        { 2088 /* IPQ_QMAX */,          "ip6_queue_maxlen" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_x25_table[] = {
-        { NET_X25_RESTART_REQUEST_TIMEOUT,      "restart_request_timeout" },
-        { NET_X25_CALL_REQUEST_TIMEOUT,         "call_request_timeout" },
-        { NET_X25_RESET_REQUEST_TIMEOUT,        "reset_request_timeout" },
-        { NET_X25_CLEAR_REQUEST_TIMEOUT,        "clear_request_timeout" },
-        { NET_X25_ACK_HOLD_BACK_TIMEOUT,        "acknowledgement_hold_back_timeout" },
-        { NET_X25_FORWARD,                      "x25_forward" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_tr_table[] = {
-        { NET_TR_RIF_TIMEOUT,   "rif_timeout" },
-        {}
-};
-
-
-static const struct trans_ctl_table trans_net_decnet_conf_vars[] = {
-        { NET_DECNET_CONF_DEV_FORWARDING,       "forwarding" },
-        { NET_DECNET_CONF_DEV_PRIORITY,         "priority" },
-        { NET_DECNET_CONF_DEV_T2,               "t2" },
-        { NET_DECNET_CONF_DEV_T3,               "t3" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_decnet_conf[] = {
-        { 0, NULL, trans_net_decnet_conf_vars },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_decnet_table[] = {
-        { NET_DECNET_CONF,              "conf", trans_net_decnet_conf },
-        { NET_DECNET_NODE_ADDRESS,      "node_address" },
-        { NET_DECNET_NODE_NAME,         "node_name" },
-        { NET_DECNET_DEFAULT_DEVICE,    "default_device" },
-        { NET_DECNET_TIME_WAIT,         "time_wait" },
-        { NET_DECNET_DN_COUNT,          "dn_count" },
-        { NET_DECNET_DI_COUNT,          "di_count" },
-        { NET_DECNET_DR_COUNT,          "dr_count" },
-        { NET_DECNET_DST_GC_INTERVAL,   "dst_gc_interval" },
-        { NET_DECNET_NO_FC_MAX_CWND,    "no_fc_max_cwnd" },
-        { NET_DECNET_MEM,               "decnet_mem" },
-        { NET_DECNET_RMEM,              "decnet_rmem" },
-        { NET_DECNET_WMEM,              "decnet_wmem" },
-        { NET_DECNET_DEBUG_LEVEL,       "debug" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_sctp_table[] = {
-        { NET_SCTP_RTO_INITIAL,         "rto_initial" },
-        { NET_SCTP_RTO_MIN,             "rto_min" },
-        { NET_SCTP_RTO_MAX,             "rto_max" },
-        { NET_SCTP_RTO_ALPHA,           "rto_alpha_exp_divisor" },
-        { NET_SCTP_RTO_BETA,            "rto_beta_exp_divisor" },
-        { NET_SCTP_VALID_COOKIE_LIFE,   "valid_cookie_life" },
-        { NET_SCTP_ASSOCIATION_MAX_RETRANS,     "association_max_retrans" },
-        { NET_SCTP_PATH_MAX_RETRANS,    "path_max_retrans" },
-        { NET_SCTP_MAX_INIT_RETRANSMITS,        "max_init_retransmits" },
-        { NET_SCTP_HB_INTERVAL,         "hb_interval" },
-        { NET_SCTP_PRESERVE_ENABLE,     "cookie_preserve_enable" },
-        { NET_SCTP_MAX_BURST,           "max_burst" },
-        { NET_SCTP_ADDIP_ENABLE,        "addip_enable" },
-        { NET_SCTP_PRSCTP_ENABLE,       "prsctp_enable" },
-        { NET_SCTP_SNDBUF_POLICY,       "sndbuf_policy" },
-        { NET_SCTP_SACK_TIMEOUT,        "sack_timeout" },
-        { NET_SCTP_RCVBUF_POLICY,       "rcvbuf_policy" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_llc_llc2_timeout_table[] = {
-        { NET_LLC2_ACK_TIMEOUT,         "ack" },
-        { NET_LLC2_P_TIMEOUT,           "p" },
-        { NET_LLC2_REJ_TIMEOUT,         "rej" },
-        { NET_LLC2_BUSY_TIMEOUT,        "busy" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_llc_station_table[] = {
-        { NET_LLC_STATION_ACK_TIMEOUT,  "ack_timeout" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_llc_llc2_table[] = {
-        { NET_LLC2,             "timeout",      trans_net_llc_llc2_timeout_table },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_llc_table[] = {
-        { NET_LLC2,             "llc2",         trans_net_llc_llc2_table },
-        { NET_LLC_STATION,      "station",      trans_net_llc_station_table },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_netfilter_table[] = {
-        { NET_NF_CONNTRACK_MAX,                         "nf_conntrack_max" },
-        { NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT,        "nf_conntrack_tcp_timeout_syn_sent" },
-        { NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV,        "nf_conntrack_tcp_timeout_syn_recv" },
-        { NET_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED,     "nf_conntrack_tcp_timeout_established" },
-        { NET_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT,        "nf_conntrack_tcp_timeout_fin_wait" },
-        { NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT,      "nf_conntrack_tcp_timeout_close_wait" },
-        { NET_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK,        "nf_conntrack_tcp_timeout_last_ack" },
-        { NET_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT,       "nf_conntrack_tcp_timeout_time_wait" },
-        { NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE,           "nf_conntrack_tcp_timeout_close" },
-        { NET_NF_CONNTRACK_UDP_TIMEOUT,                 "nf_conntrack_udp_timeout" },
-        { NET_NF_CONNTRACK_UDP_TIMEOUT_STREAM,          "nf_conntrack_udp_timeout_stream" },
-        { NET_NF_CONNTRACK_ICMP_TIMEOUT,        "nf_conntrack_icmp_timeout" },
-        { NET_NF_CONNTRACK_GENERIC_TIMEOUT,             "nf_conntrack_generic_timeout" },
-        { NET_NF_CONNTRACK_BUCKETS,                     "nf_conntrack_buckets" },
-        { NET_NF_CONNTRACK_LOG_INVALID,                 "nf_conntrack_log_invalid" },
-        { NET_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS,     "nf_conntrack_tcp_timeout_max_retrans" },
-        { NET_NF_CONNTRACK_TCP_LOOSE,                   "nf_conntrack_tcp_loose" },
-        { NET_NF_CONNTRACK_TCP_BE_LIBERAL,              "nf_conntrack_tcp_be_liberal" },
-        { NET_NF_CONNTRACK_TCP_MAX_RETRANS,             "nf_conntrack_tcp_max_retrans" },
-        { NET_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED,         "nf_conntrack_sctp_timeout_closed" },
-        { NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT,    "nf_conntrack_sctp_timeout_cookie_wait" },
-        { NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED,  "nf_conntrack_sctp_timeout_cookie_echoed" },
-        { NET_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED,    "nf_conntrack_sctp_timeout_established" },
-        { NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT,  "nf_conntrack_sctp_timeout_shutdown_sent" },
-        { NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD,  "nf_conntrack_sctp_timeout_shutdown_recd" },
-        { NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT,      "nf_conntrack_sctp_timeout_shutdown_ack_sent" },
-        { NET_NF_CONNTRACK_COUNT,                       "nf_conntrack_count" },
-        { NET_NF_CONNTRACK_ICMPV6_TIMEOUT,      "nf_conntrack_icmpv6_timeout" },
-        { NET_NF_CONNTRACK_FRAG6_TIMEOUT,               "nf_conntrack_frag6_timeout" },
-        { NET_NF_CONNTRACK_FRAG6_LOW_THRESH,            "nf_conntrack_frag6_low_thresh" },
-        { NET_NF_CONNTRACK_FRAG6_HIGH_THRESH,           "nf_conntrack_frag6_high_thresh" },
-        { NET_NF_CONNTRACK_CHECKSUM,                    "nf_conntrack_checksum" },
-
-        {}
-};
-
-static const struct trans_ctl_table trans_net_dccp_table[] = {
-        { NET_DCCP_DEFAULT,     "default" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_irda_table[] = {
-        { NET_IRDA_DISCOVERY,           "discovery" },
-        { NET_IRDA_DEVNAME,             "devname" },
-        { NET_IRDA_DEBUG,               "debug" },
-        { NET_IRDA_FAST_POLL,           "fast_poll_increase" },
-        { NET_IRDA_DISCOVERY_SLOTS,     "discovery_slots" },
-        { NET_IRDA_DISCOVERY_TIMEOUT,   "discovery_timeout" },
-        { NET_IRDA_SLOT_TIMEOUT,        "slot_timeout" },
-        { NET_IRDA_MAX_BAUD_RATE,       "max_baud_rate" },
-        { NET_IRDA_MIN_TX_TURN_TIME,    "min_tx_turn_time" },
-        { NET_IRDA_MAX_TX_DATA_SIZE,    "max_tx_data_size" },
-        { NET_IRDA_MAX_TX_WINDOW,       "max_tx_window" },
-        { NET_IRDA_MAX_NOREPLY_TIME,    "max_noreply_time" },
-        { NET_IRDA_WARN_NOREPLY_TIME,   "warn_noreply_time" },
-        { NET_IRDA_LAP_KEEPALIVE_TIME,  "lap_keepalive_time" },
-        {}
-};
-
-static const struct trans_ctl_table trans_net_table[] = {
-        { NET_CORE,             "core",         trans_net_core_table },
-        /* NET_ETHER not used */
-        /* NET_802 not used */
-        { NET_UNIX,             "unix",         trans_net_unix_table },
-        { NET_IPV4,             "ipv4",         trans_net_ipv4_table },
-        { NET_IPX,              "ipx",          trans_net_ipx_table },
-        { NET_ATALK,            "appletalk",    trans_net_atalk_table },
-        { NET_NETROM,           "netrom",       trans_net_netrom_table },
-        { NET_AX25,             "ax25",         trans_net_ax25_table },
-        { NET_BRIDGE,           "bridge",       trans_net_bridge_table },
-        { NET_ROSE,             "rose",         trans_net_rose_table },
-        { NET_IPV6,             "ipv6",         trans_net_ipv6_table },
-        { NET_X25,              "x25",          trans_net_x25_table },
-        { NET_TR,               "token-ring",   trans_net_tr_table },
-        { NET_DECNET,           "decnet",       trans_net_decnet_table },
-        /*  NET_ECONET not used */
-        { NET_SCTP,             "sctp",         trans_net_sctp_table },
-        { NET_LLC,              "llc",          trans_net_llc_table },
-        { NET_NETFILTER,        "netfilter",    trans_net_netfilter_table },
-        { NET_DCCP,             "dccp",         trans_net_dccp_table },
-        { NET_IRDA,             "irda",         trans_net_irda_table },
-        { 2089,                 "nf_conntrack_max" },
-        {}
-};
-
-static const struct trans_ctl_table trans_fs_quota_table[] = {
-        { FS_DQ_LOOKUPS,        "lookups" },
-        { FS_DQ_DROPS,          "drops" },
-        { FS_DQ_READS,          "reads" },
-        { FS_DQ_WRITES,         "writes" },
-        { FS_DQ_CACHE_HITS,     "cache_hits" },
-        { FS_DQ_ALLOCATED,      "allocated_dquots" },
-        { FS_DQ_FREE,           "free_dquots" },
-        { FS_DQ_SYNCS,          "syncs" },
-        { FS_DQ_WARNINGS,       "warnings" },
-        {}
-};
-
-static const struct trans_ctl_table trans_fs_xfs_table[] = {
-        { XFS_SGID_INHERIT,     "irix_sgid_inherit" },
-        { XFS_SYMLINK_MODE,     "irix_symlink_mode" },
-        { XFS_PANIC_MASK,       "panic_mask" },
-
-        { XFS_ERRLEVEL,         "error_level" },
-        { XFS_SYNCD_TIMER,      "xfssyncd_centisecs" },
-        { XFS_INHERIT_SYNC,     "inherit_sync" },
-        { XFS_INHERIT_NODUMP,   "inherit_nodump" },
-        { XFS_INHERIT_NOATIME,  "inherit_noatime" },
-        { XFS_BUF_TIMER,        "xfsbufd_centisecs" },
-        { XFS_BUF_AGE,          "age_buffer_centisecs" },
-        { XFS_INHERIT_NOSYM,    "inherit_nosymlinks" },
-        { XFS_ROTORSTEP,        "rotorstep" },
-        { XFS_INHERIT_NODFRG,   "inherit_nodefrag" },
-        { XFS_FILESTREAM_TIMER, "filestream_centisecs" },
-        { XFS_STATS_CLEAR,      "stats_clear" },
-        {}
-};
-
-static const struct trans_ctl_table trans_fs_ocfs2_nm_table[] = {
-        { 1, "hb_ctl_path" },
-        {}
-};
-
-static const struct trans_ctl_table trans_fs_ocfs2_table[] = {
-        { 1,    "nm",   trans_fs_ocfs2_nm_table },
-        {}
-};
-
-static const struct trans_ctl_table trans_inotify_table[] = {
-        { INOTIFY_MAX_USER_INSTANCES,   "max_user_instances" },
-        { INOTIFY_MAX_USER_WATCHES,     "max_user_watches" },
-        { INOTIFY_MAX_QUEUED_EVENTS,    "max_queued_events" },
-        {}
-};
-
-static const struct trans_ctl_table trans_fs_table[] = {
-        { FS_NRINODE,           "inode-nr" },
-        { FS_STATINODE,         "inode-state" },
-        /* FS_MAXINODE unused */
-        /* FS_NRDQUOT unused */
-        /* FS_MAXDQUOT unused */
-        { FS_NRFILE,            "file-nr" },
-        { FS_MAXFILE,           "file-max" },
-        { FS_DENTRY,            "dentry-state" },
-        /* FS_NRSUPER unused */
-        /* FS_MAXUPSER unused */
-        { FS_OVERFLOWUID,       "overflowuid" },
-        { FS_OVERFLOWGID,       "overflowgid" },
-        { FS_LEASES,            "leases-enable" },
-        { FS_DIR_NOTIFY,        "dir-notify-enable" },
-        { FS_LEASE_TIME,        "lease-break-time" },
-        { FS_DQSTATS,           "quota",                trans_fs_quota_table },
-        { FS_XFS,               "xfs",                  trans_fs_xfs_table },
-        { FS_AIO_NR,            "aio-nr" },
-        { FS_AIO_MAX_NR,        "aio-max-nr" },
-        { FS_INOTIFY,           "inotify",              trans_inotify_table },
-        { FS_OCFS2,             "ocfs2",                trans_fs_ocfs2_table },
-        { KERN_SETUID_DUMPABLE, "suid_dumpable" },
-        {}
-};
-
-static const struct trans_ctl_table trans_debug_table[] = {
-        {}
-};
-
-static const struct trans_ctl_table trans_cdrom_table[] = {
-        { DEV_CDROM_INFO,               "info" },
-        { DEV_CDROM_AUTOCLOSE,          "autoclose" },
-        { DEV_CDROM_AUTOEJECT,          "autoeject" },
-        { DEV_CDROM_DEBUG,              "debug" },
-        { DEV_CDROM_LOCK,               "lock" },
-        { DEV_CDROM_CHECK_MEDIA,        "check_media" },
-        {}
-};
-
-static const struct trans_ctl_table trans_ipmi_table[] = {
-        { DEV_IPMI_POWEROFF_POWERCYCLE, "poweroff_powercycle" },
-        {}
-};
-
-static const struct trans_ctl_table trans_mac_hid_files[] = {
-        /* DEV_MAC_HID_KEYBOARD_SENDS_LINUX_KEYCODES unused */
-        /* DEV_MAC_HID_KEYBOARD_LOCK_KEYCODES unused */
-        { DEV_MAC_HID_MOUSE_BUTTON_EMULATION,   "mouse_button_emulation" },
-        { DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE,    "mouse_button2_keycode" },
-        { DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE,    "mouse_button3_keycode" },
-        /* DEV_MAC_HID_ADB_MOUSE_SENDS_KEYCODES unused */
-        {}
-};
-
-static const struct trans_ctl_table trans_raid_table[] = {
-        { DEV_RAID_SPEED_LIMIT_MIN,     "speed_limit_min" },
-        { DEV_RAID_SPEED_LIMIT_MAX,     "speed_limit_max" },
-        {}
-};
-
-static const struct trans_ctl_table trans_scsi_table[] = {
-        { DEV_SCSI_LOGGING_LEVEL, "logging_level" },
-        {}
-};
-
-static const struct trans_ctl_table trans_parport_default_table[] = {
-        { DEV_PARPORT_DEFAULT_TIMESLICE,        "timeslice" },
-        { DEV_PARPORT_DEFAULT_SPINTIME,         "spintime" },
-        {}
-};
-
-static const struct trans_ctl_table trans_parport_device_table[] = {
-        { DEV_PARPORT_DEVICE_TIMESLICE,         "timeslice" },
-        {}
-};
-
-static const struct trans_ctl_table trans_parport_devices_table[] = {
-        { DEV_PARPORT_DEVICES_ACTIVE,           "active" },
-        { 0, NULL, trans_parport_device_table },
-        {}
-};
-
-static const struct trans_ctl_table trans_parport_parport_table[] = {
-        { DEV_PARPORT_SPINTIME,         "spintime" },
-        { DEV_PARPORT_BASE_ADDR,        "base-addr" },
-        { DEV_PARPORT_IRQ,              "irq" },
-        { DEV_PARPORT_DMA,              "dma" },
-        { DEV_PARPORT_MODES,            "modes" },
-        { DEV_PARPORT_DEVICES,          "devices",      trans_parport_devices_table },
-        { DEV_PARPORT_AUTOPROBE,        "autoprobe" },
-        { DEV_PARPORT_AUTOPROBE + 1,    "autoprobe0" },
-        { DEV_PARPORT_AUTOPROBE + 2,    "autoprobe1" },
-        { DEV_PARPORT_AUTOPROBE + 3,    "autoprobe2" },
-        { DEV_PARPORT_AUTOPROBE + 4,    "autoprobe3" },
-        {}
-};
-static const struct trans_ctl_table trans_parport_table[] = {
-        { DEV_PARPORT_DEFAULT,  "default",      trans_parport_default_table },
-        { 0, NULL, trans_parport_parport_table },
-        {}
-};
-
-static const struct trans_ctl_table trans_dev_table[] = {
-        { DEV_CDROM,    "cdrom",        trans_cdrom_table },
-        /* DEV_HWMON unused */
-        { DEV_PARPORT,  "parport",      trans_parport_table },
-        { DEV_RAID,     "raid",         trans_raid_table },
-        { DEV_MAC_HID,  "mac_hid",      trans_mac_hid_files },
-        { DEV_SCSI,     "scsi",         trans_scsi_table },
-        { DEV_IPMI,     "ipmi",         trans_ipmi_table },
-        {}
-};
-
-static const struct trans_ctl_table trans_bus_isa_table[] = {
-        { BUS_ISA_MEM_BASE,     "membase" },
-        { BUS_ISA_PORT_BASE,    "portbase" },
-        { BUS_ISA_PORT_SHIFT,   "portshift" },
-        {}
-};
-
-static const struct trans_ctl_table trans_bus_table[] = {
-        { CTL_BUS_ISA,  "isa",  trans_bus_isa_table },
-        {}
-};
-
-static const struct trans_ctl_table trans_arlan_conf_table0[] = {
-        { 1,    "spreadingCode" },
-        { 2,    "channelNumber" },
-        { 3,    "scramblingDisable" },
-        { 4,    "txAttenuation" },
-        { 5,    "systemId" },
-        { 6,    "maxDatagramSize" },
-        { 7,    "maxFrameSize" },
-        { 8,    "maxRetries" },
-        { 9,    "receiveMode" },
-        { 10,   "priority" },
-        { 11,   "rootOrRepeater" },
-        { 12,   "SID" },
-        { 13,   "registrationMode" },
-        { 14,   "registrationFill" },
-        { 15,   "localTalkAddress" },
-        { 16,   "codeFormat" },
-        { 17,   "numChannels" },
-        { 18,   "channel1" },
-        { 19,   "channel2" },
-        { 20,   "channel3" },
-        { 21,   "channel4" },
-        { 22,   "txClear" },
-        { 23,   "txRetries" },
-        { 24,   "txRouting" },
-        { 25,   "txScrambled" },
-        { 26,   "rxParameter" },
-        { 27,   "txTimeoutMs" },
-        { 28,   "waitCardTimeout" },
-        { 29,   "channelSet" },
-        { 30,   "name" },
-        { 31,   "waitTime" },
-        { 32,   "lParameter" },
-        { 33,   "_15" },
-        { 34,   "headerSize" },
-        { 36,   "tx_delay_ms" },
-        { 37,   "retries" },
-        { 38,   "ReTransmitPacketMaxSize" },
-        { 39,   "waitReTransmitPacketMaxSize" },
-        { 40,   "fastReTransCount" },
-        { 41,   "driverRetransmissions" },
-        { 42,   "txAckTimeoutMs" },
-        { 43,   "registrationInterrupts" },
-        { 44,   "hardwareType" },
-        { 45,   "radioType" },
-        { 46,   "writeEEPROM" },
-        { 47,   "writeRadioType" },
-        { 48,   "entry_exit_debug" },
-        { 49,   "debug" },
-        { 50,   "in_speed" },
-        { 51,   "out_speed" },
-        { 52,   "in_speed10" },
-        { 53,   "out_speed10" },
-        { 54,   "in_speed_max" },
-        { 55,   "out_speed_max" },
-        { 56,   "measure_rate" },
-        { 57,   "pre_Command_Wait" },
-        { 58,   "rx_tweak1" },
-        { 59,   "rx_tweak2" },
-        { 60,   "tx_queue_len" },
-
-        { 150,  "arlan0-txRing" },
-        { 151,  "arlan0-rxRing" },
-        { 152,  "arlan0-18" },
-        { 153,  "arlan0-ring" },
-        { 154,  "arlan0-shm-cpy" },
-        { 155,  "config0" },
-        { 156,  "reset0" },
-        {}
-};
-
-static const struct trans_ctl_table trans_arlan_conf_table1[] = {
-        { 1,    "spreadingCode" },
-        { 2,    "channelNumber" },
-        { 3,    "scramblingDisable" },
-        { 4,    "txAttenuation" },
-        { 5,    "systemId" },
-        { 6,    "maxDatagramSize" },
-        { 7,    "maxFrameSize" },
-        { 8,    "maxRetries" },
-        { 9,    "receiveMode" },
-        { 10,   "priority" },
-        { 11,   "rootOrRepeater" },
-        { 12,   "SID" },
-        { 13,   "registrationMode" },
-        { 14,   "registrationFill" },
-        { 15,   "localTalkAddress" },
-        { 16,   "codeFormat" },
-        { 17,   "numChannels" },
-        { 18,   "channel1" },
-        { 19,   "channel2" },
-        { 20,   "channel3" },
-        { 21,   "channel4" },
-        { 22,   "txClear" },
-        { 23,   "txRetries" },
-        { 24,   "txRouting" },
-        { 25,   "txScrambled" },
-        { 26,   "rxParameter" },
-        { 27,   "txTimeoutMs" },
-        { 28,   "waitCardTimeout" },
-        { 29,   "channelSet" },
-        { 30,   "name" },
-        { 31,   "waitTime" },
-        { 32,   "lParameter" },
-        { 33,   "_15" },
-        { 34,   "headerSize" },
-        { 36,   "tx_delay_ms" },
-        { 37,   "retries" },
-        { 38,   "ReTransmitPacketMaxSize" },
-        { 39,   "waitReTransmitPacketMaxSize" },
-        { 40,   "fastReTransCount" },
-        { 41,   "driverRetransmissions" },
-        { 42,   "txAckTimeoutMs" },
-        { 43,   "registrationInterrupts" },
-        { 44,   "hardwareType" },
-        { 45,   "radioType" },
-        { 46,   "writeEEPROM" },
-        { 47,   "writeRadioType" },
-        { 48,   "entry_exit_debug" },
-        { 49,   "debug" },
-        { 50,   "in_speed" },
-        { 51,   "out_speed" },
-        { 52,   "in_speed10" },
-        { 53,   "out_speed10" },
-        { 54,   "in_speed_max" },
-        { 55,   "out_speed_max" },
-        { 56,   "measure_rate" },
-        { 57,   "pre_Command_Wait" },
-        { 58,   "rx_tweak1" },
-        { 59,   "rx_tweak2" },
-        { 60,   "tx_queue_len" },
-
-        { 150,  "arlan1-txRing" },
-        { 151,  "arlan1-rxRing" },
-        { 152,  "arlan1-18" },
-        { 153,  "arlan1-ring" },
-        { 154,  "arlan1-shm-cpy" },
-        { 155,  "config1" },
-        { 156,  "reset1" },
-        {}
-};
-
-static const struct trans_ctl_table trans_arlan_conf_table2[] = {
-        { 1,    "spreadingCode" },
-        { 2,    "channelNumber" },
-        { 3,    "scramblingDisable" },
-        { 4,    "txAttenuation" },
-        { 5,    "systemId" },
-        { 6,    "maxDatagramSize" },
-        { 7,    "maxFrameSize" },
-        { 8,    "maxRetries" },
-        { 9,    "receiveMode" },
-        { 10,   "priority" },
-        { 11,   "rootOrRepeater" },
-        { 12,   "SID" },
-        { 13,   "registrationMode" },
-        { 14,   "registrationFill" },
-        { 15,   "localTalkAddress" },
-        { 16,   "codeFormat" },
-        { 17,   "numChannels" },
-        { 18,   "channel1" },
-        { 19,   "channel2" },
-        { 20,   "channel3" },
-        { 21,   "channel4" },
-        { 22,   "txClear" },
-        { 23,   "txRetries" },
-        { 24,   "txRouting" },
-        { 25,   "txScrambled" },
-        { 26,   "rxParameter" },
-        { 27,   "txTimeoutMs" },
-        { 28,   "waitCardTimeout" },
-        { 29,   "channelSet" },
-        { 30,   "name" },
-        { 31,   "waitTime" },
-        { 32,   "lParameter" },
-        { 33,   "_15" },
-        { 34,   "headerSize" },
-        { 36,   "tx_delay_ms" },
-        { 37,   "retries" },
-        { 38,   "ReTransmitPacketMaxSize" },
-        { 39,   "waitReTransmitPacketMaxSize" },
-        { 40,   "fastReTransCount" },
-        { 41,   "driverRetransmissions" },
-        { 42,   "txAckTimeoutMs" },
-        { 43,   "registrationInterrupts" },
-        { 44,   "hardwareType" },
-        { 45,   "radioType" },
-        { 46,   "writeEEPROM" },
-        { 47,   "writeRadioType" },
-        { 48,   "entry_exit_debug" },
-        { 49,   "debug" },
-        { 50,   "in_speed" },
-        { 51,   "out_speed" },
-        { 52,   "in_speed10" },
-        { 53,   "out_speed10" },
-        { 54,   "in_speed_max" },
-        { 55,   "out_speed_max" },
-        { 56,   "measure_rate" },
-        { 57,   "pre_Command_Wait" },
-        { 58,   "rx_tweak1" },
-        { 59,   "rx_tweak2" },
-        { 60,   "tx_queue_len" },
-
-        { 150,  "arlan2-txRing" },
-        { 151,  "arlan2-rxRing" },
-        { 152,  "arlan2-18" },
-        { 153,  "arlan2-ring" },
-        { 154,  "arlan2-shm-cpy" },
-        { 155,  "config2" },
-        { 156,  "reset2" },
-        {}
-};
-
-static const struct trans_ctl_table trans_arlan_conf_table3[] = {
-        { 1,    "spreadingCode" },
-        { 2,    "channelNumber" },
-        { 3,    "scramblingDisable" },
-        { 4,    "txAttenuation" },
-        { 5,    "systemId" },
-        { 6,    "maxDatagramSize" },
-        { 7,    "maxFrameSize" },
-        { 8,    "maxRetries" },
-        { 9,    "receiveMode" },
-        { 10,   "priority" },
-        { 11,   "rootOrRepeater" },
-        { 12,   "SID" },
-        { 13,   "registrationMode" },
-        { 14,   "registrationFill" },
-        { 15,   "localTalkAddress" },
-        { 16,   "codeFormat" },
-        { 17,   "numChannels" },
-        { 18,   "channel1" },
-        { 19,   "channel2" },
-        { 20,   "channel3" },
-        { 21,   "channel4" },
-        { 22,   "txClear" },
-        { 23,   "txRetries" },
-        { 24,   "txRouting" },
-        { 25,   "txScrambled" },
-        { 26,   "rxParameter" },
-        { 27,   "txTimeoutMs" },
-        { 28,   "waitCardTimeout" },
-        { 29,   "channelSet" },
-        { 30,   "name" },
-        { 31,   "waitTime" },
-        { 32,   "lParameter" },
-        { 33,   "_15" },
-        { 34,   "headerSize" },
-        { 36,   "tx_delay_ms" },
-        { 37,   "retries" },
-        { 38,   "ReTransmitPacketMaxSize" },
-        { 39,   "waitReTransmitPacketMaxSize" },
-        { 40,   "fastReTransCount" },
-        { 41,   "driverRetransmissions" },
-        { 42,   "txAckTimeoutMs" },
-        { 43,   "registrationInterrupts" },
-        { 44,   "hardwareType" },
-        { 45,   "radioType" },
-        { 46,   "writeEEPROM" },
-        { 47,   "writeRadioType" },
-        { 48,   "entry_exit_debug" },
-        { 49,   "debug" },
-        { 50,   "in_speed" },
-        { 51,   "out_speed" },
-        { 52,   "in_speed10" },
-        { 53,   "out_speed10" },
-        { 54,   "in_speed_max" },
-        { 55,   "out_speed_max" },
-        { 56,   "measure_rate" },
-        { 57,   "pre_Command_Wait" },
-        { 58,   "rx_tweak1" },
-        { 59,   "rx_tweak2" },
-        { 60,   "tx_queue_len" },
-
-        { 150,  "arlan3-txRing" },
-        { 151,  "arlan3-rxRing" },
-        { 152,  "arlan3-18" },
-        { 153,  "arlan3-ring" },
-        { 154,  "arlan3-shm-cpy" },
-        { 155,  "config3" },
-        { 156,  "reset3" },
-        {}
-};
-
-static const struct trans_ctl_table trans_arlan_table[] = {
-        { 1,            "arlan0",       trans_arlan_conf_table0 },
-        { 2,            "arlan1",       trans_arlan_conf_table1 },
-        { 3,            "arlan2",       trans_arlan_conf_table2 },
-        { 4,            "arlan3",       trans_arlan_conf_table3 },
-        {}
-};
-
-static const struct trans_ctl_table trans_s390dbf_table[] = {
-        { 5678 /* CTL_S390DBF_STOPPABLE */,     "debug_stoppable" },
-        { 5679 /* CTL_S390DBF_ACTIVE */,        "debug_active" },
-        {}
-};
-
-static const struct trans_ctl_table trans_sunrpc_table[] = {
-        { CTL_RPCDEBUG,         "rpc_debug" },
-        { CTL_NFSDEBUG,         "nfs_debug" },
-        { CTL_NFSDDEBUG,        "nfsd_debug" },
-        { CTL_NLMDEBUG,         "nlm_debug" },
-        { CTL_SLOTTABLE_UDP,    "udp_slot_table_entries" },
-        { CTL_SLOTTABLE_TCP,    "tcp_slot_table_entries" },
-        { CTL_MIN_RESVPORT,     "min_resvport" },
-        { CTL_MAX_RESVPORT,     "max_resvport" },
-        {}
-};
-
-static const struct trans_ctl_table trans_pm_table[] = {
-        { 1 /* CTL_PM_SUSPEND */,       "suspend" },
-        { 2 /* CTL_PM_CMODE */,         "cmode" },
-        { 3 /* CTL_PM_P0 */,            "p0" },
-        { 4 /* CTL_PM_CM */,            "cm" },
-        {}
-};
-
-static const struct trans_ctl_table trans_frv_table[] = {
-        { 1,    "cache-mode" },
-        { 2,    "pin-cxnr" },
-        {}
-};
-
-static const struct trans_ctl_table trans_root_table[] = {
-        { CTL_KERN,     "kernel",       trans_kern_table },
-        { CTL_VM,       "vm",           trans_vm_table },
-        { CTL_NET,      "net",          trans_net_table },
-        /* CTL_PROC not used */
-        { CTL_FS,       "fs",           trans_fs_table },
-        { CTL_DEBUG,    "debug",        trans_debug_table },
-        { CTL_DEV,      "dev",          trans_dev_table },
-        { CTL_BUS,      "bus",          trans_bus_table },
-        { CTL_ABI,      "abi" },
-        /* CTL_CPU not used */
-        { CTL_ARLAN,    "arlan",        trans_arlan_table },
-        { CTL_S390DBF,  "s390dbf",      trans_s390dbf_table },
-        { CTL_SUNRPC,   "sunrpc",       trans_sunrpc_table },
-        { CTL_PM,       "pm",           trans_pm_table },
-        { CTL_FRV,      "frv",          trans_frv_table },
-        {}
-};
-
-
-
 
 static int sysctl_depth(struct ctl_table *table)
 {
@@ -1261,47 +28,6 @@ static struct ctl_table *sysctl_parent(struct ctl_table *table, int n)
         return table;
 }
 
-static const struct trans_ctl_table *sysctl_binary_lookup(struct ctl_table *table)
-{
-        struct ctl_table *test;
-        const struct trans_ctl_table *ref;
-        int cur_depth;
-
-        cur_depth = sysctl_depth(table);
-
-        ref = trans_root_table;
-repeat:
-        test = sysctl_parent(table, cur_depth);
-        for (; ref->ctl_name || ref->procname || ref->child; ref++) {
-                int match = 0;
-
-                if (cur_depth && !ref->child)
-                        continue;
-
-                if (test->procname && ref->procname &&
-                        (strcmp(test->procname, ref->procname) == 0))
-                        match++;
-
-                if (test->ctl_name && ref->ctl_name &&
-                        (test->ctl_name == ref->ctl_name))
-                        match++;
-
-                if (!ref->ctl_name && !ref->procname)
-                        match++;
-
-                if (match) {
-                        if (cur_depth != 0) {
-                                cur_depth--;
-                                ref = ref->child;
-                                goto repeat;
-                        }
-                        goto out;
-                }
-        }
-        ref = NULL;
-out:
-        return ref;
-}
 
 static void sysctl_print_path(struct ctl_table *table)
 {
@@ -1315,26 +41,6 @@ static void sysctl_print_path(struct ctl_table *table)
                 }
         }
         printk(" ");
-        if (table->ctl_name) {
-                for (i = depth; i >= 0; i--) {
-                        tmp = sysctl_parent(table, i);
-                        printk(".%d", tmp->ctl_name);
-                }
-        }
-}
-
-static void sysctl_repair_table(struct ctl_table *table)
-{
-        /* Don't complain about the classic default
-         * sysctl strategy routine.  Maybe later we
-         * can get the tables fixed and complain about
-         * this.
-         */
-        if (table->ctl_name && table->procname &&
-                (table->proc_handler == proc_dointvec) &&
-                (!table->strategy)) {
-                table->strategy = sysctl_data;
-        }
 }
 
 static struct ctl_table *sysctl_check_lookup(struct nsproxy *namespaces,
@@ -1352,7 +58,7 @@ static struct ctl_table *sysctl_check_lookup(struct nsproxy *namespaces,
                 ref = head->ctl_table;
 repeat:
                 test = sysctl_parent(table, cur_depth);
-                for (; ref->ctl_name || ref->procname; ref++) {
+                for (; ref->procname; ref++) {
                         int match = 0;
                         if (cur_depth && !ref->child)
                                 continue;
@@ -1361,10 +67,6 @@ repeat:
                             (strcmp(test->procname, ref->procname) == 0))
                                         match++;
 
-                        if (test->ctl_name && ref->ctl_name &&
-                            (test->ctl_name == ref->ctl_name))
-                                match++;
-
                         if (match) {
                                 if (cur_depth != 0) {
                                         cur_depth--;
@@ -1392,38 +94,6 @@ static void set_fail(const char **fail, struct ctl_table *table, const char *str
         *fail = str;
 }
 
-static int sysctl_check_dir(struct nsproxy *namespaces,
-                                struct ctl_table *table)
-{
-        struct ctl_table *ref;
-        int error;
-
-        error = 0;
-        ref = sysctl_check_lookup(namespaces, table);
-        if (ref) {
-                int match = 0;
-                if ((!table->procname && !ref->procname) ||
-                    (table->procname && ref->procname &&
-                     (strcmp(table->procname, ref->procname) == 0)))
-                        match++;
-
-                if ((!table->ctl_name && !ref->ctl_name) ||
-                    (table->ctl_name && ref->ctl_name &&
-                     (table->ctl_name == ref->ctl_name)))
-                        match++;
-
-                if (match != 2) {
-                        printk(KERN_ERR "%s: failed: ", __func__);
-                        sysctl_print_path(table);
-                        printk(" ref: ");
-                        sysctl_print_path(ref);
-                        printk("\n");
-                        error = -EINVAL;
-                }
-        }
-        return error;
-}
-
 static void sysctl_check_leaf(struct nsproxy *namespaces,
                                 struct ctl_table *table, const char **fail)
 {
@@ -1434,37 +104,15 @@ static void sysctl_check_leaf(struct nsproxy *namespaces,
                 set_fail(fail, table, "Sysctl already exists");
 }
 
-static void sysctl_check_bin_path(struct ctl_table *table, const char **fail)
-{
-        const struct trans_ctl_table *ref;
-
-        ref = sysctl_binary_lookup(table);
-        if (table->ctl_name && !ref)
-                set_fail(fail, table, "Unknown sysctl binary path");
-        if (ref) {
-                if (ref->procname &&
-                    (!table->procname ||
-                     (strcmp(table->procname, ref->procname) != 0)))
-                        set_fail(fail, table, "procname does not match binary path procname");
-
-                if (ref->ctl_name && table->ctl_name &&
-                    (table->ctl_name != ref->ctl_name))
-                        set_fail(fail, table, "ctl_name does not match binary path ctl_name");
-        }
-}
-
 int sysctl_check_table(struct nsproxy *namespaces, struct ctl_table *table)
 {
         int error = 0;
-        for (; table->ctl_name || table->procname; table++) {
+        for (; table->procname; table++) {
                 const char *fail = NULL;
 
-                sysctl_repair_table(table);
                 if (table->parent) {
                         if (table->procname && !table->parent->procname)
                                 set_fail(&fail, table, "Parent without procname");
-                        if (table->ctl_name && !table->parent->ctl_name)
-                                set_fail(&fail, table, "Parent without ctl_name");
                 }
                 if (!table->procname)
                         set_fail(&fail, table, "No procname");
@@ -1477,21 +125,12 @@ int sysctl_check_table(struct nsproxy *namespaces, struct ctl_table *table)
                                 set_fail(&fail, table, "Writable sysctl directory");
                         if (table->proc_handler)
                                 set_fail(&fail, table, "Directory with proc_handler");
-                        if (table->strategy)
-                                set_fail(&fail, table, "Directory with strategy");
                         if (table->extra1)
                                 set_fail(&fail, table, "Directory with extra1");
                         if (table->extra2)
                                 set_fail(&fail, table, "Directory with extra2");
-                        if (sysctl_check_dir(namespaces, table))
-                                set_fail(&fail, table, "Inconsistent directory names");
                 } else {
-                        if ((table->strategy == sysctl_data) ||
-                            (table->strategy == sysctl_string) ||
-                            (table->strategy == sysctl_intvec) ||
-                            (table->strategy == sysctl_jiffies) ||
-                            (table->strategy == sysctl_ms_jiffies) ||
-                            (table->proc_handler == proc_dostring) ||
+                        if ((table->proc_handler == proc_dostring) ||
                             (table->proc_handler == proc_dointvec) ||
                             (table->proc_handler == proc_dointvec_minmax) ||
                             (table->proc_handler == proc_dointvec_jiffies) ||
@@ -1513,14 +152,6 @@ int sysctl_check_table(struct nsproxy *namespaces, struct ctl_table *table)
                                                 set_fail(&fail, table, "No max");
                                 }
                         }
-#ifdef CONFIG_SYSCTL_SYSCALL
-                        if (table->ctl_name && !table->strategy)
-                                set_fail(&fail, table, "Missing strategy");
-#endif
-#if 0
-                        if (!table->ctl_name && table->strategy)
-                                set_fail(&fail, table, "Strategy without ctl_name");
-#endif
 #ifdef CONFIG_PROC_SYSCTL
                         if (table->procname && !table->proc_handler)
                                 set_fail(&fail, table, "No proc_handler");
@@ -1531,7 +162,6 @@ int sysctl_check_table(struct nsproxy *namespaces, struct ctl_table *table)
 #endif
                         sysctl_check_leaf(namespaces, table, &fail);
                 }
-                sysctl_check_bin_path(table, &fail);
                 if (table->mode > 0777)
                         set_fail(&fail, table, "bogus .mode");
                 if (fail) {
diff --git a/kernel/time.c b/kernel/time.c
index 2e2e469a7fec..c6324d96009e 100644
--- a/kernel/time.c
+++ b/kernel/time.c
@@ -136,7 +136,6 @@ static inline void warp_clock(void)
         write_seqlock_irq(&xtime_lock);
         wall_to_monotonic.tv_sec -= sys_tz.tz_minuteswest * 60;
         xtime.tv_sec += sys_tz.tz_minuteswest * 60;
-        update_xtime_cache(0);
         write_sequnlock_irq(&xtime_lock);
         clock_was_set();
 }
@@ -662,6 +661,36 @@ u64 nsec_to_clock_t(u64 x)
 #endif
 }
 
+/**
+ * nsecs_to_jiffies - Convert nsecs in u64 to jiffies
+ *
+ * @n:  nsecs in u64
+ *
+ * Unlike {m,u}secs_to_jiffies, type of input is not unsigned int but u64.
+ * And this doesn't return MAX_JIFFY_OFFSET since this function is designed
+ * for scheduler, not for use in device drivers to calculate timeout value.
+ *
+ * note:
+ *   NSEC_PER_SEC = 10^9 = (5^9 * 2^9) = (1953125 * 512)
+ *   ULLONG_MAX ns = 18446744073.709551615 secs = about 584 years
+ */
+unsigned long nsecs_to_jiffies(u64 n)
+{
+#if (NSEC_PER_SEC % HZ) == 0
+        /* Common case, HZ = 100, 128, 200, 250, 256, 500, 512, 1000 etc. */
+        return div_u64(n, NSEC_PER_SEC / HZ);
+#elif (HZ % 512) == 0
+        /* overflow after 292 years if HZ = 1024 */
+        return div_u64(n * HZ / 512, NSEC_PER_SEC / 512);
+#else
+        /*
+         * Generic case - optimized for cases where HZ is a multiple of 3.
+         * overflow after 64.99 years, exact for HZ = 60, 72, 90, 120 etc.
+         */
+        return div_u64(n * 9, (9ull * NSEC_PER_SEC + HZ / 2) / HZ);
+#endif
+}
+
 #if (BITS_PER_LONG < 64)
 u64 get_jiffies_64(void)
 {
diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index 620b58abdc32..3d5fc0fd1cca 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -20,6 +20,8 @@
 #include <linux/sysdev.h>
 #include <linux/tick.h>
 
+#include "tick-internal.h"
+
 /* The registered clock event devices */
 static LIST_HEAD(clockevent_devices);
 static LIST_HEAD(clockevents_released);
@@ -28,7 +30,7 @@ static LIST_HEAD(clockevents_released);
 static RAW_NOTIFIER_HEAD(clockevents_chain);
 
 /* Protection for the above */
-static DEFINE_SPINLOCK(clockevents_lock);
+static DEFINE_RAW_SPINLOCK(clockevents_lock);
 
 /**
  * clockevents_delta2ns - Convert a latch value (device ticks) to nanoseconds
@@ -37,10 +39,9 @@ static DEFINE_SPINLOCK(clockevents_lock);
  *
  * Math helper, returns latch value converted to nanoseconds (bound checked)
  */
-unsigned long clockevent_delta2ns(unsigned long latch,
-                                  struct clock_event_device *evt)
+u64 clockevent_delta2ns(unsigned long latch, struct clock_event_device *evt)
 {
-        u64 clc = ((u64) latch << evt->shift);
+        u64 clc = (u64) latch << evt->shift;
 
         if (unlikely(!evt->mult)) {
                 evt->mult = 1;
@@ -50,10 +51,10 @@ unsigned long clockevent_delta2ns(unsigned long latch,
         do_div(clc, evt->mult);
         if (clc < 1000)
                 clc = 1000;
-        if (clc > LONG_MAX)
-                clc = LONG_MAX;
+        if (clc > KTIME_MAX)
+                clc = KTIME_MAX;
 
-        return (unsigned long) clc;
+        return clc;
 }
 EXPORT_SYMBOL_GPL(clockevent_delta2ns);
 
@@ -140,9 +141,9 @@ int clockevents_register_notifier(struct notifier_block *nb)
         unsigned long flags;
         int ret;
 
-        spin_lock_irqsave(&clockevents_lock, flags);
+        raw_spin_lock_irqsave(&clockevents_lock, flags);
         ret = raw_notifier_chain_register(&clockevents_chain, nb);
-        spin_unlock_irqrestore(&clockevents_lock, flags);
+        raw_spin_unlock_irqrestore(&clockevents_lock, flags);
 
         return ret;
 }
@@ -184,13 +185,13 @@ void clockevents_register_device(struct clock_event_device *dev)
         BUG_ON(dev->mode != CLOCK_EVT_MODE_UNUSED);
         BUG_ON(!dev->cpumask);
 
-        spin_lock_irqsave(&clockevents_lock, flags);
+        raw_spin_lock_irqsave(&clockevents_lock, flags);
 
         list_add(&dev->list, &clockevent_devices);
         clockevents_do_notify(CLOCK_EVT_NOTIFY_ADD, dev);
         clockevents_notify_released();
 
-        spin_unlock_irqrestore(&clockevents_lock, flags);
+        raw_spin_unlock_irqrestore(&clockevents_lock, flags);
 }
 EXPORT_SYMBOL_GPL(clockevents_register_device);
 
@@ -240,7 +241,7 @@ void clockevents_notify(unsigned long reason, void *arg)
         struct list_head *node, *tmp;
         unsigned long flags;
 
-        spin_lock_irqsave(&clockevents_lock, flags);
+        raw_spin_lock_irqsave(&clockevents_lock, flags);
         clockevents_do_notify(reason, arg);
 
         switch (reason) {
@@ -255,7 +256,7 @@ void clockevents_notify(unsigned long reason, void *arg)
         default:
                 break;
         }
-        spin_unlock_irqrestore(&clockevents_lock, flags);
+        raw_spin_unlock_irqrestore(&clockevents_lock, flags);
 }
 EXPORT_SYMBOL_GPL(clockevents_notify);
 #endif
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 5e18c6ab2c6a..e85c23404d34 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -39,7 +39,7 @@ void timecounter_init(struct timecounter *tc,
         tc->cycle_last = cc->read(cc);
         tc->nsec = start_tstamp;
 }
-EXPORT_SYMBOL(timecounter_init);
+EXPORT_SYMBOL_GPL(timecounter_init);
 
 /**
  * timecounter_read_delta - get nanoseconds since last call of this function
@@ -83,7 +83,7 @@ u64 timecounter_read(struct timecounter *tc)
 
         return nsec;
 }
-EXPORT_SYMBOL(timecounter_read);
+EXPORT_SYMBOL_GPL(timecounter_read);
 
 u64 timecounter_cyc2time(struct timecounter *tc,
                          cycle_t cycle_tstamp)
@@ -105,7 +105,60 @@ u64 timecounter_cyc2time(struct timecounter *tc,
 
         return nsec;
 }
-EXPORT_SYMBOL(timecounter_cyc2time);
+EXPORT_SYMBOL_GPL(timecounter_cyc2time);
+
+/**
+ * clocks_calc_mult_shift - calculate mult/shift factors for scaled math of clocks
+ * @mult:       pointer to mult variable
+ * @shift:      pointer to shift variable
+ * @from:       frequency to convert from
+ * @to:         frequency to convert to
+ * @minsec:     guaranteed runtime conversion range in seconds
+ *
+ * The function evaluates the shift/mult pair for the scaled math
+ * operations of clocksources and clockevents.
+ *
+ * @to and @from are frequency values in HZ. For clock sources @to is
+ * NSEC_PER_SEC == 1GHz and @from is the counter frequency. For clock
+ * event @to is the counter frequency and @from is NSEC_PER_SEC.
+ *
+ * The @minsec conversion range argument controls the time frame in
+ * seconds which must be covered by the runtime conversion with the
+ * calculated mult and shift factors. This guarantees that no 64bit
+ * overflow happens when the input value of the conversion is
+ * multiplied with the calculated mult factor. Larger ranges may
+ * reduce the conversion accuracy by chosing smaller mult and shift
+ * factors.
+ */
+void
+clocks_calc_mult_shift(u32 *mult, u32 *shift, u32 from, u32 to, u32 minsec)
+{
+        u64 tmp;
+        u32 sft, sftacc= 32;
+
+        /*
+         * Calculate the shift factor which is limiting the conversion
+         * range:
+         */
+        tmp = ((u64)minsec * from) >> 32;
+        while (tmp) {
+                tmp >>=1;
+                sftacc--;
+        }
+
+        /*
+         * Find the conversion shift/mult pair which has the best
+         * accuracy and fits the maxsec conversion range:
+         */
+        for (sft = 32; sft > 0; sft--) {
+                tmp = (u64) to << sft;
+                do_div(tmp, from);
+                if ((tmp >> sftacc) == 0)
+                        break;
+        }
+        *mult = tmp;
+        *shift = sft;
+}
 
 /*[Clocksource internal variables]---------
  * curr_clocksource:
@@ -413,6 +466,47 @@ void clocksource_touch_watchdog(void)
         clocksource_resume_watchdog();
 }
 
+/**
+ * clocksource_max_deferment - Returns max time the clocksource can be deferred
+ * @cs:         Pointer to clocksource
+ *
+ */
+static u64 clocksource_max_deferment(struct clocksource *cs)
+{
+        u64 max_nsecs, max_cycles;
+
+        /*
+         * Calculate the maximum number of cycles that we can pass to the
+         * cyc2ns function without overflowing a 64-bit signed result. The
+         * maximum number of cycles is equal to ULLONG_MAX/cs->mult which
+         * is equivalent to the below.
+         * max_cycles < (2^63)/cs->mult
+         * max_cycles < 2^(log2((2^63)/cs->mult))
+         * max_cycles < 2^(log2(2^63) - log2(cs->mult))
+         * max_cycles < 2^(63 - log2(cs->mult))
+         * max_cycles < 1 << (63 - log2(cs->mult))
+         * Please note that we add 1 to the result of the log2 to account for
+         * any rounding errors, ensure the above inequality is satisfied and
+         * no overflow will occur.
+         */
+        max_cycles = 1ULL << (63 - (ilog2(cs->mult) + 1));
+
+        /*
+         * The actual maximum number of cycles we can defer the clocksource is
+         * determined by the minimum of max_cycles and cs->mask.
+         */
+        max_cycles = min_t(u64, max_cycles, (u64) cs->mask);
+        max_nsecs = clocksource_cyc2ns(max_cycles, cs->mult, cs->shift);
+
+        /*
+         * To ensure that the clocksource does not wrap whilst we are idle,
+         * limit the time the clocksource can be deferred by 12.5%. Please
+         * note a margin of 12.5% is used because this can be computed with
+         * a shift, versus say 10% which would require division.
+         */
+        return max_nsecs - (max_nsecs >> 5);
+}
+
 #ifdef CONFIG_GENERIC_TIME
 
 /**
@@ -511,6 +605,9 @@ static void clocksource_enqueue(struct clocksource *cs)
  */
 int clocksource_register(struct clocksource *cs)
 {
+        /* calculate max idle time permitted for this clocksource */
+        cs->max_idle_ns = clocksource_max_deferment(cs);
+
         mutex_lock(&clocksource_mutex);
         clocksource_enqueue(cs);
         clocksource_select();
@@ -580,7 +677,7 @@ sysfs_show_current_clocksources(struct sys_device *dev,
  * @count:      length of buffer
  *
  * Takes input from sysfs interface for manually overriding the default
- * clocksource selction.
+ * clocksource selection.
  */
 static ssize_t sysfs_override_clocksource(struct sys_device *dev,
                                           struct sysdev_attribute *attr,
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index c2ec25087a35..b3bafd5fc66d 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -31,7 +31,7 @@ static struct tick_device tick_broadcast_device;
 /* FIXME: Use cpumask_var_t. */
 static DECLARE_BITMAP(tick_broadcast_mask, NR_CPUS);
 static DECLARE_BITMAP(tmpmask, NR_CPUS);
-static DEFINE_SPINLOCK(tick_broadcast_lock);
+static DEFINE_RAW_SPINLOCK(tick_broadcast_lock);
 static int tick_broadcast_force;
 
 #ifdef CONFIG_TICK_ONESHOT
@@ -96,7 +96,7 @@ int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu)
         unsigned long flags;
         int ret = 0;
 
-        spin_lock_irqsave(&tick_broadcast_lock, flags);
+        raw_spin_lock_irqsave(&tick_broadcast_lock, flags);
 
         /*
          * Devices might be registered with both periodic and oneshot
@@ -122,7 +122,7 @@ int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu)
                         tick_broadcast_clear_oneshot(cpu);
                 }
         }
-        spin_unlock_irqrestore(&tick_broadcast_lock, flags);
+        raw_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
         return ret;
 }
 
@@ -161,13 +161,13 @@ static void tick_do_broadcast(struct cpumask *mask)
  */
 static void tick_do_periodic_broadcast(void)
 {
-        spin_lock(&tick_broadcast_lock);
+        raw_spin_lock(&tick_broadcast_lock);
 
         cpumask_and(to_cpumask(tmpmask),
                     cpu_online_mask, tick_get_broadcast_mask());
         tick_do_broadcast(to_cpumask(tmpmask));
 
-        spin_unlock(&tick_broadcast_lock);
+        raw_spin_unlock(&tick_broadcast_lock);
 }
 
 /*
@@ -212,7 +212,7 @@ static void tick_do_broadcast_on_off(unsigned long *reason)
         unsigned long flags;
         int cpu, bc_stopped;
 
-        spin_lock_irqsave(&tick_broadcast_lock, flags);
+        raw_spin_lock_irqsave(&tick_broadcast_lock, flags);
 
         cpu = smp_processor_id();
         td = &per_cpu(tick_cpu_device, cpu);
@@ -263,7 +263,7 @@ static void tick_do_broadcast_on_off(unsigned long *reason)
                         tick_broadcast_setup_oneshot(bc);
         }
 out:
-        spin_unlock_irqrestore(&tick_broadcast_lock, flags);
+        raw_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
 }
 
 /*
@@ -299,7 +299,7 @@ void tick_shutdown_broadcast(unsigned int *cpup)
         unsigned long flags;
         unsigned int cpu = *cpup;
 
-        spin_lock_irqsave(&tick_broadcast_lock, flags);
+        raw_spin_lock_irqsave(&tick_broadcast_lock, flags);
 
         bc = tick_broadcast_device.evtdev;
         cpumask_clear_cpu(cpu, tick_get_broadcast_mask());
@@ -309,7 +309,7 @@ void tick_shutdown_broadcast(unsigned int *cpup)
                         clockevents_shutdown(bc);
         }
 
-        spin_unlock_irqrestore(&tick_broadcast_lock, flags);
+        raw_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
 }
 
 void tick_suspend_broadcast(void)
@@ -317,13 +317,13 @@ void tick_suspend_broadcast(void)
         struct clock_event_device *bc;
         unsigned long flags;
 
-        spin_lock_irqsave(&tick_broadcast_lock, flags);
+        raw_spin_lock_irqsave(&tick_broadcast_lock, flags);
 
         bc = tick_broadcast_device.evtdev;
         if (bc)
                 clockevents_shutdown(bc);
 
-        spin_unlock_irqrestore(&tick_broadcast_lock, flags);
+        raw_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
 }
 
 int tick_resume_broadcast(void)
@@ -332,7 +332,7 @@ int tick_resume_broadcast(void)
         unsigned long flags;
         int broadcast = 0;
 
-        spin_lock_irqsave(&tick_broadcast_lock, flags);
+        raw_spin_lock_irqsave(&tick_broadcast_lock, flags);
 
         bc = tick_broadcast_device.evtdev;
 
@@ -351,7 +351,7 @@ int tick_resume_broadcast(void)
                         break;
                 }
         }
-        spin_unlock_irqrestore(&tick_broadcast_lock, flags);
+        raw_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
 
         return broadcast;
 }
@@ -405,7 +405,7 @@ static void tick_handle_oneshot_broadcast(struct clock_event_device *dev)
         ktime_t now, next_event;
         int cpu;
 
-        spin_lock(&tick_broadcast_lock);
+        raw_spin_lock(&tick_broadcast_lock);
 again:
         dev->next_event.tv64 = KTIME_MAX;
         next_event.tv64 = KTIME_MAX;
@@ -443,7 +443,7 @@ again:
                 if (tick_broadcast_set_event(next_event, 0))
                         goto again;
         }
-        spin_unlock(&tick_broadcast_lock);
+        raw_spin_unlock(&tick_broadcast_lock);
 }
 
 /*
@@ -457,7 +457,7 @@ void tick_broadcast_oneshot_control(unsigned long reason)
         unsigned long flags;
         int cpu;
 
-        spin_lock_irqsave(&tick_broadcast_lock, flags);
+        raw_spin_lock_irqsave(&tick_broadcast_lock, flags);
 
         /*
          * Periodic mode does not care about the enter/exit of power
@@ -492,7 +492,7 @@ void tick_broadcast_oneshot_control(unsigned long reason)
         }
 
 out:
-        spin_unlock_irqrestore(&tick_broadcast_lock, flags);
+        raw_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
 }
 
 /*
@@ -563,13 +563,13 @@ void tick_broadcast_switch_to_oneshot(void)
         struct clock_event_device *bc;
         unsigned long flags;
 
-        spin_lock_irqsave(&tick_broadcast_lock, flags);
+        raw_spin_lock_irqsave(&tick_broadcast_lock, flags);
 
         tick_broadcast_device.mode = TICKDEV_MODE_ONESHOT;
         bc = tick_broadcast_device.evtdev;
         if (bc)
                 tick_broadcast_setup_oneshot(bc);
-        spin_unlock_irqrestore(&tick_broadcast_lock, flags);
+        raw_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
 }
 
 
@@ -581,7 +581,7 @@ void tick_shutdown_broadcast_oneshot(unsigned int *cpup)
         unsigned long flags;
         unsigned int cpu = *cpup;
 
-        spin_lock_irqsave(&tick_broadcast_lock, flags);
+        raw_spin_lock_irqsave(&tick_broadcast_lock, flags);
 
         /*
          * Clear the broadcast mask flag for the dead cpu, but do not
@@ -589,7 +589,7 @@ void tick_shutdown_broadcast_oneshot(unsigned int *cpup)
          */
         cpumask_clear_cpu(cpu, tick_get_broadcast_oneshot_mask());
 
-        spin_unlock_irqrestore(&tick_broadcast_lock, flags);
+        raw_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
 }
 
 /*
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index 83c4417b6a3c..b6b898d2eeef 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -34,7 +34,7 @@ DEFINE_PER_CPU(struct tick_device, tick_cpu_device);
 ktime_t tick_next_period;
 ktime_t tick_period;
 int tick_do_timer_cpu __read_mostly = TICK_DO_TIMER_BOOT;
-DEFINE_SPINLOCK(tick_device_lock);
+static DEFINE_RAW_SPINLOCK(tick_device_lock);
 
 /*
  * Debugging: see timer_list.c
@@ -209,7 +209,7 @@ static int tick_check_new_device(struct clock_event_device *newdev)
         int cpu, ret = NOTIFY_OK;
         unsigned long flags;
 
-        spin_lock_irqsave(&tick_device_lock, flags);
+        raw_spin_lock_irqsave(&tick_device_lock, flags);
 
         cpu = smp_processor_id();
         if (!cpumask_test_cpu(cpu, newdev->cpumask))
@@ -268,7 +268,7 @@ static int tick_check_new_device(struct clock_event_device *newdev)
         if (newdev->features & CLOCK_EVT_FEAT_ONESHOT)
                 tick_oneshot_notify();
 
-        spin_unlock_irqrestore(&tick_device_lock, flags);
+        raw_spin_unlock_irqrestore(&tick_device_lock, flags);
         return NOTIFY_STOP;
 
 out_bc:
@@ -278,7 +278,7 @@ out_bc:
         if (tick_check_broadcast_device(newdev))
                 ret = NOTIFY_STOP;
 
-        spin_unlock_irqrestore(&tick_device_lock, flags);
+        raw_spin_unlock_irqrestore(&tick_device_lock, flags);
 
         return ret;
 }
@@ -311,7 +311,7 @@ static void tick_shutdown(unsigned int *cpup)
         struct clock_event_device *dev = td->evtdev;
         unsigned long flags;
 
-        spin_lock_irqsave(&tick_device_lock, flags);
+        raw_spin_lock_irqsave(&tick_device_lock, flags);
         td->mode = TICKDEV_MODE_PERIODIC;
         if (dev) {
                 /*
@@ -322,7 +322,7 @@ static void tick_shutdown(unsigned int *cpup)
                 clockevents_exchange_device(dev, NULL);
                 td->evtdev = NULL;
         }
-        spin_unlock_irqrestore(&tick_device_lock, flags);
+        raw_spin_unlock_irqrestore(&tick_device_lock, flags);
 }
 
 static void tick_suspend(void)
@@ -330,9 +330,9 @@ static void tick_suspend(void)
         struct tick_device *td = &__get_cpu_var(tick_cpu_device);
         unsigned long flags;
 
-        spin_lock_irqsave(&tick_device_lock, flags);
+        raw_spin_lock_irqsave(&tick_device_lock, flags);
         clockevents_shutdown(td->evtdev);
-        spin_unlock_irqrestore(&tick_device_lock, flags);
+        raw_spin_unlock_irqrestore(&tick_device_lock, flags);
 }
 
 static void tick_resume(void)
@@ -341,7 +341,7 @@ static void tick_resume(void)
         unsigned long flags;
         int broadcast = tick_resume_broadcast();
 
-        spin_lock_irqsave(&tick_device_lock, flags);
+        raw_spin_lock_irqsave(&tick_device_lock, flags);
         clockevents_set_mode(td->evtdev, CLOCK_EVT_MODE_RESUME);
 
         if (!broadcast) {
@@ -350,7 +350,7 @@ static void tick_resume(void)
                 else
                         tick_resume_oneshot();
         }
-        spin_unlock_irqrestore(&tick_device_lock, flags);
+        raw_spin_unlock_irqrestore(&tick_device_lock, flags);
 }
 
 /*
diff --git a/kernel/time/tick-internal.h b/kernel/time/tick-internal.h
index b1c05bf75ee0..290eefbc1f60 100644
--- a/kernel/time/tick-internal.h
+++ b/kernel/time/tick-internal.h
@@ -6,7 +6,6 @@
 #define TICK_DO_TIMER_BOOT      -2
 
 DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
-extern spinlock_t tick_device_lock;
 extern ktime_t tick_next_period;
 extern ktime_t tick_period;
 extern int tick_do_timer_cpu __read_mostly;
diff --git a/kernel/time/tick-oneshot.c b/kernel/time/tick-oneshot.c
index a96c0e2b89cf..0a8a213016f0 100644
--- a/kernel/time/tick-oneshot.c
+++ b/kernel/time/tick-oneshot.c
@@ -50,9 +50,9 @@ int tick_dev_program_event(struct clock_event_device *dev, ktime_t expires,
                                 dev->min_delta_ns += dev->min_delta_ns >> 1;
 
                         printk(KERN_WARNING
-                               "CE: %s increasing min_delta_ns to %lu nsec\n",
+                               "CE: %s increasing min_delta_ns to %llu nsec\n",
                                dev->name ? dev->name : "?",
-                               dev->min_delta_ns << 1);
+                               (unsigned long long) dev->min_delta_ns << 1);
 
                         i = 0;
                 }
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 89aed5933ed4..f992762d7f51 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -134,18 +134,13 @@ __setup("nohz=", setup_tick_nohz);
  * value. We do this unconditionally on any cpu, as we don't know whether the
  * cpu, which has the update task assigned is in a long sleep.
  */
-static void tick_nohz_update_jiffies(void)
+static void tick_nohz_update_jiffies(ktime_t now)
 {
         int cpu = smp_processor_id();
         struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
         unsigned long flags;
-        ktime_t now;
-
-        if (!ts->tick_stopped)
-                return;
 
         cpumask_clear_cpu(cpu, nohz_cpu_mask);
-        now = ktime_get();
         ts->idle_waketime = now;
 
         local_irq_save(flags);
@@ -155,20 +150,17 @@ static void tick_nohz_update_jiffies(void)
         touch_softlockup_watchdog();
 }
 
-static void tick_nohz_stop_idle(int cpu)
+static void tick_nohz_stop_idle(int cpu, ktime_t now)
 {
         struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
+        ktime_t delta;
 
-        if (ts->idle_active) {
-                ktime_t now, delta;
-                now = ktime_get();
-                delta = ktime_sub(now, ts->idle_entrytime);
-                ts->idle_lastupdate = now;
-                ts->idle_sleeptime = ktime_add(ts->idle_sleeptime, delta);
-                ts->idle_active = 0;
+        delta = ktime_sub(now, ts->idle_entrytime);
+        ts->idle_lastupdate = now;
+        ts->idle_sleeptime = ktime_add(ts->idle_sleeptime, delta);
+        ts->idle_active = 0;
 
-                sched_clock_idle_wakeup_event(0);
-        }
+        sched_clock_idle_wakeup_event(0);
 }
 
 static ktime_t tick_nohz_start_idle(struct tick_sched *ts)
@@ -216,6 +208,7 @@ void tick_nohz_stop_sched_tick(int inidle)
         struct tick_sched *ts;
         ktime_t last_update, expires, now;
         struct clock_event_device *dev = __get_cpu_var(tick_cpu_device).evtdev;
+        u64 time_delta;
         int cpu;
 
         local_irq_save(flags);
@@ -263,7 +256,7 @@ void tick_nohz_stop_sched_tick(int inidle)
 
                 if (ratelimit < 10) {
                         printk(KERN_ERR "NOHZ: local_softirq_pending %02x\n",
-                               local_softirq_pending());
+                               (unsigned int) local_softirq_pending());
                         ratelimit++;
                 }
                 goto end;
@@ -275,14 +268,18 @@ void tick_nohz_stop_sched_tick(int inidle)
                 seq = read_seqbegin(&xtime_lock);
                 last_update = last_jiffies_update;
                 last_jiffies = jiffies;
+                time_delta = timekeeping_max_deferment();
         } while (read_seqretry(&xtime_lock, seq));
 
-        /* Get the next timer wheel timer */
-        next_jiffies = get_next_timer_interrupt(last_jiffies);
-        delta_jiffies = next_jiffies - last_jiffies;
-
-        if (rcu_needs_cpu(cpu) || printk_needs_cpu(cpu))
+        if (rcu_needs_cpu(cpu) || printk_needs_cpu(cpu) ||
+            arch_needs_cpu(cpu)) {
+                next_jiffies = last_jiffies + 1;
                 delta_jiffies = 1;
+        } else {
+                /* Get the next timer wheel timer */
+                next_jiffies = get_next_timer_interrupt(last_jiffies);
+                delta_jiffies = next_jiffies - last_jiffies;
+        }
         /*
          * Do not stop the tick, if we are only one off
          * or if the cpu is required for rcu
@@ -294,22 +291,51 @@ void tick_nohz_stop_sched_tick(int inidle)
         if ((long)delta_jiffies >= 1) {
 
                 /*
-                * calculate the expiry time for the next timer wheel
-                * timer
-                */
-                expires = ktime_add_ns(last_update, tick_period.tv64 *
-                                   delta_jiffies);
-
-                /*
                  * If this cpu is the one which updates jiffies, then
                  * give up the assignment and let it be taken by the
                  * cpu which runs the tick timer next, which might be
                  * this cpu as well. If we don't drop this here the
                  * jiffies might be stale and do_timer() never
-                 * invoked.
+                 * invoked. Keep track of the fact that it was the one
+                 * which had the do_timer() duty last. If this cpu is
+                 * the one which had the do_timer() duty last, we
+                 * limit the sleep time to the timekeeping
+                 * max_deferement value which we retrieved
+                 * above. Otherwise we can sleep as long as we want.
                  */
-                if (cpu == tick_do_timer_cpu)
+                if (cpu == tick_do_timer_cpu) {
                         tick_do_timer_cpu = TICK_DO_TIMER_NONE;
+                        ts->do_timer_last = 1;
+                } else if (tick_do_timer_cpu != TICK_DO_TIMER_NONE) {
+                        time_delta = KTIME_MAX;
+                        ts->do_timer_last = 0;
+                } else if (!ts->do_timer_last) {
+                        time_delta = KTIME_MAX;
+                }
+
+                /*
+                 * calculate the expiry time for the next timer wheel
+                 * timer. delta_jiffies >= NEXT_TIMER_MAX_DELTA signals
+                 * that there is no timer pending or at least extremely
+                 * far into the future (12 days for HZ=1000). In this
+                 * case we set the expiry to the end of time.
+                 */
+                if (likely(delta_jiffies < NEXT_TIMER_MAX_DELTA)) {
+                        /*
+                         * Calculate the time delta for the next timer event.
+                         * If the time delta exceeds the maximum time delta
+                         * permitted by the current clocksource then adjust
+                         * the time delta accordingly to ensure the
+                         * clocksource does not wrap.
+                         */
+                        time_delta = min_t(u64, time_delta,
+                                           tick_period.tv64 * delta_jiffies);
+                }
+
+                if (time_delta < KTIME_MAX)
+                        expires = ktime_add_ns(last_update, time_delta);
+                else
+                        expires.tv64 = KTIME_MAX;
 
                 if (delta_jiffies > 1)
                         cpumask_set_cpu(cpu, nohz_cpu_mask);
@@ -342,22 +368,19 @@ void tick_nohz_stop_sched_tick(int inidle)
 
                 ts->idle_sleeps++;
 
+                /* Mark expires */
+                ts->idle_expires = expires;
+
                 /*
-                 * delta_jiffies >= NEXT_TIMER_MAX_DELTA signals that
-                 * there is no timer pending or at least extremly far
-                 * into the future (12 days for HZ=1000). In this case
-                 * we simply stop the tick timer:
+                 * If the expiration time == KTIME_MAX, then
+                 * in this case we simply stop the tick timer.
                  */
-                if (unlikely(delta_jiffies >= NEXT_TIMER_MAX_DELTA)) {
-                        ts->idle_expires.tv64 = KTIME_MAX;
+                 if (unlikely(expires.tv64 == KTIME_MAX)) {
                         if (ts->nohz_mode == NOHZ_MODE_HIGHRES)
                                 hrtimer_cancel(&ts->sched_timer);
                         goto out;
                 }
 
-                /* Mark expiries */
-                ts->idle_expires = expires;
-
                 if (ts->nohz_mode == NOHZ_MODE_HIGHRES) {
                         hrtimer_start(&ts->sched_timer, expires,
                                       HRTIMER_MODE_ABS_PINNED);
@@ -436,7 +459,11 @@ void tick_nohz_restart_sched_tick(void)
         ktime_t now;
 
         local_irq_disable();
-        tick_nohz_stop_idle(cpu);
+        if (ts->idle_active || (ts->inidle && ts->tick_stopped))
+                now = ktime_get();
+
+        if (ts->idle_active)
+                tick_nohz_stop_idle(cpu, now);
 
         if (!ts->inidle || !ts->tick_stopped) {
                 ts->inidle = 0;
@@ -450,7 +477,6 @@ void tick_nohz_restart_sched_tick(void)
 
         /* Update jiffies first */
         select_nohz_load_balancer(0);
-        now = ktime_get();
         tick_do_update_jiffies64(now);
         cpumask_clear_cpu(cpu, nohz_cpu_mask);
 
@@ -584,22 +610,18 @@ static void tick_nohz_switch_to_nohz(void)
  * timer and do not touch the other magic bits which need to be done
  * when idle is left.
  */
-static void tick_nohz_kick_tick(int cpu)
+static void tick_nohz_kick_tick(int cpu, ktime_t now)
 {
 #if 0
         /* Switch back to 2.6.27 behaviour */
 
         struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
-        ktime_t delta, now;
-
-        if (!ts->tick_stopped)
-                return;
+        ktime_t delta;
 
         /*
          * Do not touch the tick device, when the next expiry is either
          * already reached or less/equal than the tick period.
          */
-        now = ktime_get();
         delta = ktime_sub(hrtimer_get_expires(&ts->sched_timer), now);
         if (delta.tv64 <= tick_period.tv64)
                 return;
@@ -608,9 +630,26 @@ static void tick_nohz_kick_tick(int cpu)
 #endif
 }
 
+static inline void tick_check_nohz(int cpu)
+{
+        struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
+        ktime_t now;
+
+        if (!ts->idle_active && !ts->tick_stopped)
+                return;
+        now = ktime_get();
+        if (ts->idle_active)
+                tick_nohz_stop_idle(cpu, now);
+        if (ts->tick_stopped) {
+                tick_nohz_update_jiffies(now);
+                tick_nohz_kick_tick(cpu, now);
+        }
+}
+
 #else
 
 static inline void tick_nohz_switch_to_nohz(void) { }
+static inline void tick_check_nohz(int cpu) { }
 
 #endif /* NO_HZ */
 
@@ -620,11 +659,7 @@ static inline void tick_nohz_switch_to_nohz(void) { }
 void tick_check_idle(int cpu)
 {
         tick_check_oneshot_broadcast(cpu);
-#ifdef CONFIG_NO_HZ
-        tick_nohz_stop_idle(cpu);
-        tick_nohz_update_jiffies();
-        tick_nohz_kick_tick(cpu);
-#endif
+        tick_check_nohz(cpu);
 }
 
 /*
diff --git a/kernel/time/timecompare.c b/kernel/time/timecompare.c
index 71e7f1a19156..12f5c55090be 100644
--- a/kernel/time/timecompare.c
+++ b/kernel/time/timecompare.c
@@ -40,7 +40,7 @@ ktime_t timecompare_transform(struct timecompare *sync,
 
         return ns_to_ktime(nsec);
 }
-EXPORT_SYMBOL(timecompare_transform);
+EXPORT_SYMBOL_GPL(timecompare_transform);
 
 int timecompare_offset(struct timecompare *sync,
                        s64 *offset,
@@ -89,7 +89,7 @@ int timecompare_offset(struct timecompare *sync,
                          * source time
                          */
                         sample.offset =
-                                ktime_to_ns(ktime_add(end, start)) / 2 -
+                                (ktime_to_ns(end) + ktime_to_ns(start)) / 2 -
                                 ts;
 
                         /* simple insertion sort based on duration */
@@ -131,7 +131,7 @@ int timecompare_offset(struct timecompare *sync,
 
         return used;
 }
-EXPORT_SYMBOL(timecompare_offset);
+EXPORT_SYMBOL_GPL(timecompare_offset);
 
 void __timecompare_update(struct timecompare *sync,
                           u64 source_tstamp)
@@ -188,4 +188,4 @@ void __timecompare_update(struct timecompare *sync,
                 }
         }
 }
-EXPORT_SYMBOL(__timecompare_update);
+EXPORT_SYMBOL_GPL(__timecompare_update);
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index c3a4e2907eaa..af4135f05825 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -165,19 +165,12 @@ struct timespec raw_time;
 /* flag for if timekeeping is suspended */
 int __read_mostly timekeeping_suspended;
 
-static struct timespec xtime_cache __attribute__ ((aligned (16)));
-void update_xtime_cache(u64 nsec)
-{
-        xtime_cache = xtime;
-        timespec_add_ns(&xtime_cache, nsec);
-}
-
 /* must hold xtime_lock */
 void timekeeping_leap_insert(int leapsecond)
 {
         xtime.tv_sec += leapsecond;
         wall_to_monotonic.tv_sec -= leapsecond;
-        update_vsyscall(&xtime, timekeeper.clock);
+        update_vsyscall(&xtime, timekeeper.clock, timekeeper.mult);
 }
 
 #ifdef CONFIG_GENERIC_TIME
@@ -332,12 +325,10 @@ int do_settimeofday(struct timespec *tv)
 
         xtime = *tv;
 
-        update_xtime_cache(0);
-
         timekeeper.ntp_error = 0;
         ntp_clear();
 
-        update_vsyscall(&xtime, timekeeper.clock);
+        update_vsyscall(&xtime, timekeeper.clock, timekeeper.mult);
 
         write_sequnlock_irqrestore(&xtime_lock, flags);
 
@@ -488,6 +479,17 @@ int timekeeping_valid_for_hres(void)
 }
 
 /**
+ * timekeeping_max_deferment - Returns max time the clocksource can be deferred
+ *
+ * Caller must observe xtime_lock via read_seqbegin/read_seqretry to
+ * ensure that the clocksource does not change!
+ */
+u64 timekeeping_max_deferment(void)
+{
+        return timekeeper.clock->max_idle_ns;
+}
+
+/**
  * read_persistent_clock -  Return time from the persistent clock.
  *
  * Weak dummy function for arches that do not yet support it.
@@ -548,7 +550,6 @@ void __init timekeeping_init(void)
         }
         set_normalized_timespec(&wall_to_monotonic,
                                 -boot.tv_sec, -boot.tv_nsec);
-        update_xtime_cache(0);
         total_sleep_time.tv_sec = 0;
         total_sleep_time.tv_nsec = 0;
         write_sequnlock_irqrestore(&xtime_lock, flags);
@@ -582,7 +583,6 @@ static int timekeeping_resume(struct sys_device *dev)
                 wall_to_monotonic = timespec_sub(wall_to_monotonic, ts);
                 total_sleep_time = timespec_add_safe(total_sleep_time, ts);
         }
-        update_xtime_cache(0);
         /* re-base the last cycle value */
         timekeeper.clock->cycle_last = timekeeper.clock->read(timekeeper.clock);
         timekeeper.ntp_error = 0;
@@ -723,6 +723,49 @@ static void timekeeping_adjust(s64 offset)
 }
 
 /**
+ * logarithmic_accumulation - shifted accumulation of cycles
+ *
+ * This functions accumulates a shifted interval of cycles into
+ * into a shifted interval nanoseconds. Allows for O(log) accumulation
+ * loop.
+ *
+ * Returns the unconsumed cycles.
+ */
+static cycle_t logarithmic_accumulation(cycle_t offset, int shift)
+{
+        u64 nsecps = (u64)NSEC_PER_SEC << timekeeper.shift;
+
+        /* If the offset is smaller then a shifted interval, do nothing */
+        if (offset < timekeeper.cycle_interval<<shift)
+                return offset;
+
+        /* Accumulate one shifted interval */
+        offset -= timekeeper.cycle_interval << shift;
+        timekeeper.clock->cycle_last += timekeeper.cycle_interval << shift;
+
+        timekeeper.xtime_nsec += timekeeper.xtime_interval << shift;
+        while (timekeeper.xtime_nsec >= nsecps) {
+                timekeeper.xtime_nsec -= nsecps;
+                xtime.tv_sec++;
+                second_overflow();
+        }
+
+        /* Accumulate into raw time */
+        raw_time.tv_nsec += timekeeper.raw_interval << shift;;
+        while (raw_time.tv_nsec >= NSEC_PER_SEC) {
+                raw_time.tv_nsec -= NSEC_PER_SEC;
+                raw_time.tv_sec++;
+        }
+
+        /* Accumulate error between NTP and clock interval */
+        timekeeper.ntp_error += tick_length << shift;
+        timekeeper.ntp_error -= timekeeper.xtime_interval <<
+                                (timekeeper.ntp_error_shift + shift);
+
+        return offset;
+}
+
+/**
  * update_wall_time - Uses the current clocksource to increment the wall time
  *
  * Called from the timer interrupt, must hold a write on xtime_lock.
@@ -731,7 +774,7 @@ void update_wall_time(void)
 {
         struct clocksource *clock;
         cycle_t offset;
-        u64 nsecs;
+        int shift = 0, maxshift;
 
         /* Make sure we're fully resumed: */
         if (unlikely(timekeeping_suspended))
@@ -745,33 +788,22 @@ void update_wall_time(void)
 #endif
         timekeeper.xtime_nsec = (s64)xtime.tv_nsec << timekeeper.shift;
 
-        /* normally this loop will run just once, however in the
-         * case of lost or late ticks, it will accumulate correctly.
+        /*
+         * With NO_HZ we may have to accumulate many cycle_intervals
+         * (think "ticks") worth of time at once. To do this efficiently,
+         * we calculate the largest doubling multiple of cycle_intervals
+         * that is smaller then the offset. We then accumulate that
+         * chunk in one go, and then try to consume the next smaller
+         * doubled multiple.
          */
+        shift = ilog2(offset) - ilog2(timekeeper.cycle_interval);
+        shift = max(0, shift);
+        /* Bound shift to one less then what overflows tick_length */
+        maxshift = (8*sizeof(tick_length) - (ilog2(tick_length)+1)) - 1;
+        shift = min(shift, maxshift);
         while (offset >= timekeeper.cycle_interval) {
-                u64 nsecps = (u64)NSEC_PER_SEC << timekeeper.shift;
-
-                /* accumulate one interval */
-                offset -= timekeeper.cycle_interval;
-                clock->cycle_last += timekeeper.cycle_interval;
-
-                timekeeper.xtime_nsec += timekeeper.xtime_interval;
-                if (timekeeper.xtime_nsec >= nsecps) {
-                        timekeeper.xtime_nsec -= nsecps;
-                        xtime.tv_sec++;
-                        second_overflow();
-                }
-
-                raw_time.tv_nsec += timekeeper.raw_interval;
-                if (raw_time.tv_nsec >= NSEC_PER_SEC) {
-                        raw_time.tv_nsec -= NSEC_PER_SEC;
-                        raw_time.tv_sec++;
-                }
-
-                /* accumulate error between NTP and clock interval */
-                timekeeper.ntp_error += tick_length;
-                timekeeper.ntp_error -= timekeeper.xtime_interval <<
-                                        timekeeper.ntp_error_shift;
+                offset = logarithmic_accumulation(offset, shift);
+                shift--;
         }
 
         /* correct the clock when NTP error is too big */
@@ -807,11 +839,8 @@ void update_wall_time(void)
         timekeeper.ntp_error += timekeeper.xtime_nsec <<
                                 timekeeper.ntp_error_shift;
 
-        nsecs = clocksource_cyc2ns(offset, timekeeper.mult, timekeeper.shift);
-        update_xtime_cache(nsecs);
-
         /* check to see if there is a new clocksource to use */
-        update_vsyscall(&xtime, timekeeper.clock);
+        update_vsyscall(&xtime, timekeeper.clock, timekeeper.mult);
 }
 
 /**
@@ -846,13 +875,13 @@ void monotonic_to_bootbased(struct timespec *ts)
 
 unsigned long get_seconds(void)
 {
-        return xtime_cache.tv_sec;
+        return xtime.tv_sec;
 }
 EXPORT_SYMBOL(get_seconds);
 
 struct timespec __current_kernel_time(void)
 {
-        return xtime_cache;
+        return xtime;
 }
 
 struct timespec current_kernel_time(void)
@@ -862,8 +891,7 @@ struct timespec current_kernel_time(void)
 
         do {
                 seq = read_seqbegin(&xtime_lock);
-
-                now = xtime_cache;
+                now = xtime;
         } while (read_seqretry(&xtime_lock, seq));
 
         return now;
@@ -877,8 +905,7 @@ struct timespec get_monotonic_coarse(void)
 
         do {
                 seq = read_seqbegin(&xtime_lock);
-
-                now = xtime_cache;
+                now = xtime;
                 mono = wall_to_monotonic;
         } while (read_seqretry(&xtime_lock, seq));
 
diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index 1b5b7aa2fdfd..28265636b6c2 100644
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -84,7 +84,7 @@ print_active_timers(struct seq_file *m, struct hrtimer_clock_base *base,
 
 next_one:
         i = 0;
-        spin_lock_irqsave(&base->cpu_base->lock, flags);
+        raw_spin_lock_irqsave(&base->cpu_base->lock, flags);
 
         curr = base->first;
         /*
@@ -100,13 +100,13 @@ next_one:
 
                 timer = rb_entry(curr, struct hrtimer, node);
                 tmp = *timer;
-                spin_unlock_irqrestore(&base->cpu_base->lock, flags);
+                raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags);
 
                 print_timer(m, timer, &tmp, i, now);
                 next++;
                 goto next_one;
         }
-        spin_unlock_irqrestore(&base->cpu_base->lock, flags);
+        raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags);
 }
 
 static void
@@ -150,6 +150,9 @@ static void print_cpu(struct seq_file *m, int cpu, u64 now)
         P_ns(expires_next);
         P(hres_active);
         P(nr_events);
+        P(nr_retries);
+        P(nr_hangs);
+        P_ns(max_hang_time);
 #endif
 #undef P
 #undef P_ns
@@ -204,10 +207,12 @@ print_tickdevice(struct seq_file *m, struct tick_device *td, int cpu)
                 return;
         }
         SEQ_printf(m, "%s\n", dev->name);
-        SEQ_printf(m, " max_delta_ns:   %lu\n", dev->max_delta_ns);
-        SEQ_printf(m, " min_delta_ns:   %lu\n", dev->min_delta_ns);
-        SEQ_printf(m, " mult:           %lu\n", dev->mult);
-        SEQ_printf(m, " shift:          %d\n", dev->shift);
+        SEQ_printf(m, " max_delta_ns:   %llu\n",
+                   (unsigned long long) dev->max_delta_ns);
+        SEQ_printf(m, " min_delta_ns:   %llu\n",
+                   (unsigned long long) dev->min_delta_ns);
+        SEQ_printf(m, " mult:           %u\n", dev->mult);
+        SEQ_printf(m, " shift:          %u\n", dev->shift);
         SEQ_printf(m, " mode:           %d\n", dev->mode);
         SEQ_printf(m, " next_event:     %Ld nsecs\n",
                    (unsigned long long) ktime_to_ns(dev->next_event));
@@ -252,7 +257,7 @@ static int timer_list_show(struct seq_file *m, void *v)
         u64 now = ktime_to_ns(ktime_get());
         int cpu;
 
-        SEQ_printf(m, "Timer List Version: v0.4\n");
+        SEQ_printf(m, "Timer List Version: v0.5\n");
         SEQ_printf(m, "HRTIMER_MAX_CLOCK_BASES: %d\n", HRTIMER_MAX_CLOCK_BASES);
         SEQ_printf(m, "now at %Ld nsecs\n", (unsigned long long)now);
 
diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c
index ee5681f8d7ec..2f3b585b8d7d 100644
--- a/kernel/time/timer_stats.c
+++ b/kernel/time/timer_stats.c
@@ -86,7 +86,7 @@ static DEFINE_SPINLOCK(table_lock);
 /*
  * Per-CPU lookup locks for fast hash lookup:
  */
-static DEFINE_PER_CPU(spinlock_t, lookup_lock);
+static DEFINE_PER_CPU(raw_spinlock_t, tstats_lookup_lock);
 
 /*
  * Mutex to serialize state changes with show-stats activities:
@@ -238,14 +238,14 @@ void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
         /*
          * It doesnt matter which lock we take:
          */
-        spinlock_t *lock;
+        raw_spinlock_t *lock;
         struct entry *entry, input;
         unsigned long flags;
 
         if (likely(!timer_stats_active))
                 return;
 
-        lock = &per_cpu(lookup_lock, raw_smp_processor_id());
+        lock = &per_cpu(tstats_lookup_lock, raw_smp_processor_id());
 
         input.timer = timer;
         input.start_func = startf;
@@ -253,7 +253,7 @@ void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
         input.pid = pid;
         input.timer_flag = timer_flag;
 
-        spin_lock_irqsave(lock, flags);
+        raw_spin_lock_irqsave(lock, flags);
         if (!timer_stats_active)
                 goto out_unlock;
 
@@ -264,7 +264,7 @@ void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
                 atomic_inc(&overflow_count);
 
  out_unlock:
-        spin_unlock_irqrestore(lock, flags);
+        raw_spin_unlock_irqrestore(lock, flags);
 }
 
 static void print_name_offset(struct seq_file *m, unsigned long addr)
@@ -348,9 +348,11 @@ static void sync_access(void)
         int cpu;
 
         for_each_online_cpu(cpu) {
-                spin_lock_irqsave(&per_cpu(lookup_lock, cpu), flags);
+                raw_spinlock_t *lock = &per_cpu(tstats_lookup_lock, cpu);
+
+                raw_spin_lock_irqsave(lock, flags);
                 /* nothing */
-                spin_unlock_irqrestore(&per_cpu(lookup_lock, cpu), flags);
+                raw_spin_unlock_irqrestore(lock, flags);
         }
 }
 
@@ -408,7 +410,7 @@ void __init init_timer_stats(void)
         int cpu;
 
         for_each_possible_cpu(cpu)
-                spin_lock_init(&per_cpu(lookup_lock, cpu));
+                raw_spin_lock_init(&per_cpu(tstats_lookup_lock, cpu));
 }
 
 static int __init init_tstats_procfs(void)
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index b416512ad17f..d006554888dc 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -339,6 +339,27 @@ config POWER_TRACER
           power management decisions, specifically the C-state and P-state
           behavior.
 
+config KSYM_TRACER
+        bool "Trace read and write access on kernel memory locations"
+        depends on HAVE_HW_BREAKPOINT
+        select TRACING
+        help
+          This tracer helps find read and write operations on any given kernel
+          symbol i.e. /proc/kallsyms.
+
+config PROFILE_KSYM_TRACER
+        bool "Profile all kernel memory accesses on 'watched' variables"
+        depends on KSYM_TRACER
+        help
+          This tracer profiles kernel accesses on variables watched through the
+          ksym tracer ftrace plugin. Depending upon the hardware, all read
+          and write operations on kernel variables can be monitored for
+          accesses.
+
+          The results will be displayed in:
+          /debugfs/tracing/profile_ksym
+
+          Say N if unsure.
 
 config STACK_TRACER
         bool "Trace max stack"
@@ -428,6 +449,23 @@ config BLK_DEV_IO_TRACE
 
           If unsure, say N.
 
+config KPROBE_EVENT
+        depends on KPROBES
+        depends on X86
+        bool "Enable kprobes-based dynamic events"
+        select TRACING
+        default y
+        help
+          This allows the user to add tracing events (similar to tracepoints) on the fly
+          via the ftrace interface. See Documentation/trace/kprobetrace.txt
+          for more details.
+
+          Those events can be inserted wherever kprobes can probe, and record
+          various register and memory values.
+
+          This option is also required by perf-probe subcommand of perf tools. If
+          you want to use perf tools, this option is strongly recommended.
+
 config DYNAMIC_FTRACE
         bool "enable/disable ftrace tracepoints dynamically"
         depends on FUNCTION_TRACER
diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
index 26f03ac07c2b..cd9ecd89ec77 100644
--- a/kernel/trace/Makefile
+++ b/kernel/trace/Makefile
@@ -53,6 +53,8 @@ obj-$(CONFIG_EVENT_TRACING) += trace_export.o
 obj-$(CONFIG_FTRACE_SYSCALLS) += trace_syscalls.o
 obj-$(CONFIG_EVENT_PROFILE) += trace_event_profile.o
 obj-$(CONFIG_EVENT_TRACING) += trace_events_filter.o
+obj-$(CONFIG_KPROBE_EVENT) += trace_kprobe.o
+obj-$(CONFIG_KSYM_TRACER) += trace_ksym.o
 obj-$(CONFIG_EVENT_TRACING) += power-traces.o
 
 libftrace-y := ftrace.o
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 6dc4e5ef7a01..7968762c8167 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -60,6 +60,13 @@ static int last_ftrace_enabled;
 /* Quick disabling of function tracer. */
 int function_trace_stop;
 
+/* List for set_ftrace_pid's pids. */
+LIST_HEAD(ftrace_pids);
+struct ftrace_pid {
+        struct list_head list;
+        struct pid *pid;
+};
+
 /*
  * ftrace_disabled is set when an anomaly is discovered.
  * ftrace_disabled is much stronger than ftrace_enabled.
@@ -78,6 +85,10 @@ ftrace_func_t ftrace_trace_function __read_mostly = ftrace_stub;
 ftrace_func_t __ftrace_trace_function __read_mostly = ftrace_stub;
 ftrace_func_t ftrace_pid_function __read_mostly = ftrace_stub;
 
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+static int ftrace_set_func(unsigned long *array, int *idx, char *buffer);
+#endif
+
 static void ftrace_list_func(unsigned long ip, unsigned long parent_ip)
 {
         struct ftrace_ops *op = ftrace_list;
@@ -155,7 +166,7 @@ static int __register_ftrace_function(struct ftrace_ops *ops)
                 else
                         func = ftrace_list_func;
 
-                if (ftrace_pid_trace) {
+                if (!list_empty(&ftrace_pids)) {
                         set_ftrace_pid_function(func);
                         func = ftrace_pid_func;
                 }
@@ -203,7 +214,7 @@ static int __unregister_ftrace_function(struct ftrace_ops *ops)
                 if (ftrace_list->next == &ftrace_list_end) {
                         ftrace_func_t func = ftrace_list->func;
 
-                        if (ftrace_pid_trace) {
+                        if (!list_empty(&ftrace_pids)) {
                                 set_ftrace_pid_function(func);
                                 func = ftrace_pid_func;
                         }
@@ -231,7 +242,7 @@ static void ftrace_update_pid_func(void)
         func = __ftrace_trace_function;
 #endif
 
-        if (ftrace_pid_trace) {
+        if (!list_empty(&ftrace_pids)) {
                 set_ftrace_pid_function(func);
                 func = ftrace_pid_func;
         } else {
@@ -821,8 +832,6 @@ static __init void ftrace_profile_debugfs(struct dentry *d_tracer)
 }
 #endif /* CONFIG_FUNCTION_PROFILER */
 
-/* set when tracing only a pid */
-struct pid *ftrace_pid_trace;
 static struct pid * const ftrace_swapper_pid = &init_struct_pid;
 
 #ifdef CONFIG_DYNAMIC_FTRACE
@@ -1261,12 +1270,34 @@ static int ftrace_update_code(struct module *mod)
                 ftrace_new_addrs = p->newlist;
                 p->flags = 0L;
 
-                /* convert record (i.e, patch mcount-call with NOP) */
-                if (ftrace_code_disable(mod, p)) {
-                        p->flags |= FTRACE_FL_CONVERTED;
-                        ftrace_update_cnt++;
-                } else
+                /*
+                 * Do the initial record convertion from mcount jump
+                 * to the NOP instructions.
+                 */
+                if (!ftrace_code_disable(mod, p)) {
                         ftrace_free_rec(p);
+                        continue;
+                }
+
+                p->flags |= FTRACE_FL_CONVERTED;
+                ftrace_update_cnt++;
+
+                /*
+                 * If the tracing is enabled, go ahead and enable the record.
+                 *
+                 * The reason not to enable the record immediatelly is the
+                 * inherent check of ftrace_make_nop/ftrace_make_call for
+                 * correct previous instructions.  Making first the NOP
+                 * conversion puts the module to the correct state, thus
+                 * passing the ftrace_make_call check.
+                 */
+                if (ftrace_start_up) {
+                        int failed = __ftrace_replace_code(p, 1);
+                        if (failed) {
+                                ftrace_bug(failed, p->ip);
+                                ftrace_free_rec(p);
+                        }
+                }
         }
 
         stop = ftrace_now(raw_smp_processor_id());
@@ -1656,60 +1687,6 @@ ftrace_regex_lseek(struct file *file, loff_t offset, int origin)
         return ret;
 }
 
-enum {
-        MATCH_FULL,
-        MATCH_FRONT_ONLY,
-        MATCH_MIDDLE_ONLY,
-        MATCH_END_ONLY,
-};
-
-/*
- * (static function - no need for kernel doc)
- *
- * Pass in a buffer containing a glob and this function will
- * set search to point to the search part of the buffer and
- * return the type of search it is (see enum above).
- * This does modify buff.
- *
- * Returns enum type.
- *  search returns the pointer to use for comparison.
- *  not returns 1 if buff started with a '!'
- *     0 otherwise.
- */
-static int
-ftrace_setup_glob(char *buff, int len, char **search, int *not)
-{
-        int type = MATCH_FULL;
-        int i;
-
-        if (buff[0] == '!') {
-                *not = 1;
-                buff++;
-                len--;
-        } else
-                *not = 0;
-
-        *search = buff;
-
-        for (i = 0; i < len; i++) {
-                if (buff[i] == '*') {
-                        if (!i) {
-                                *search = buff + 1;
-                                type = MATCH_END_ONLY;
-                        } else {
-                                if (type == MATCH_END_ONLY)
-                                        type = MATCH_MIDDLE_ONLY;
-                                else
-                                        type = MATCH_FRONT_ONLY;
-                                buff[i] = 0;
-                                break;
-                        }
-                }
-        }
-
-        return type;
-}
-
 static int ftrace_match(char *str, char *regex, int len, int type)
 {
         int matched = 0;
@@ -1747,7 +1724,7 @@ ftrace_match_record(struct dyn_ftrace *rec, char *regex, int len, int type)
         return ftrace_match(str, regex, len, type);
 }
 
-static void ftrace_match_records(char *buff, int len, int enable)
+static int ftrace_match_records(char *buff, int len, int enable)
 {
         unsigned int search_len;
         struct ftrace_page *pg;
@@ -1756,9 +1733,10 @@ static void ftrace_match_records(char *buff, int len, int enable)
         char *search;
         int type;
         int not;
+        int found = 0;
 
         flag = enable ? FTRACE_FL_FILTER : FTRACE_FL_NOTRACE;
-        type = ftrace_setup_glob(buff, len, &search, &not);
+        type = filter_parse_regex(buff, len, &search, &not);
 
         search_len = strlen(search);
 
@@ -1773,6 +1751,7 @@ static void ftrace_match_records(char *buff, int len, int enable)
                                 rec->flags &= ~flag;
                         else
                                 rec->flags |= flag;
+                        found = 1;
                 }
                 /*
                  * Only enable filtering if we have a function that
@@ -1782,6 +1761,8 @@ static void ftrace_match_records(char *buff, int len, int enable)
                         ftrace_filtered = 1;
         } while_for_each_ftrace_rec();
         mutex_unlock(&ftrace_lock);
+
+        return found;
 }
 
 static int
@@ -1803,7 +1784,7 @@ ftrace_match_module_record(struct dyn_ftrace *rec, char *mod,
                 return 1;
 }
 
-static void ftrace_match_module_records(char *buff, char *mod, int enable)
+static int ftrace_match_module_records(char *buff, char *mod, int enable)
 {
         unsigned search_len = 0;
         struct ftrace_page *pg;
@@ -1812,6 +1793,7 @@ static void ftrace_match_module_records(char *buff, char *mod, int enable)
         char *search = buff;
         unsigned long flag;
         int not = 0;
+        int found = 0;
 
         flag = enable ? FTRACE_FL_FILTER : FTRACE_FL_NOTRACE;
 
@@ -1826,7 +1808,7 @@ static void ftrace_match_module_records(char *buff, char *mod, int enable)
         }
 
         if (strlen(buff)) {
-                type = ftrace_setup_glob(buff, strlen(buff), &search, &not);
+                type = filter_parse_regex(buff, strlen(buff), &search, &not);
                 search_len = strlen(search);
         }
 
@@ -1842,12 +1824,15 @@ static void ftrace_match_module_records(char *buff, char *mod, int enable)
                                 rec->flags &= ~flag;
                         else
                                 rec->flags |= flag;
+                        found = 1;
                 }
                 if (enable && (rec->flags & FTRACE_FL_FILTER))
                         ftrace_filtered = 1;
 
         } while_for_each_ftrace_rec();
         mutex_unlock(&ftrace_lock);
+
+        return found;
 }
 
 /*
@@ -1876,8 +1861,9 @@ ftrace_mod_callback(char *func, char *cmd, char *param, int enable)
         if (!strlen(mod))
                 return -EINVAL;
 
-        ftrace_match_module_records(func, mod, enable);
-        return 0;
+        if (ftrace_match_module_records(func, mod, enable))
+                return 0;
+        return -EINVAL;
 }
 
 static struct ftrace_func_command ftrace_mod_cmd = {
@@ -1991,7 +1977,7 @@ register_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
         int count = 0;
         char *search;
 
-        type = ftrace_setup_glob(glob, strlen(glob), &search, &not);
+        type = filter_parse_regex(glob, strlen(glob), &search, &not);
         len = strlen(search);
 
         /* we do not support '!' for function probes */
@@ -2068,7 +2054,7 @@ __unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
         else if (glob) {
                 int not;
 
-                type = ftrace_setup_glob(glob, strlen(glob), &search, &not);
+                type = filter_parse_regex(glob, strlen(glob), &search, &not);
                 len = strlen(search);
 
                 /* we do not support '!' for function probes */
@@ -2174,8 +2160,9 @@ static int ftrace_process_regex(char *buff, int len, int enable)
         func = strsep(&next, ":");
 
         if (!next) {
-                ftrace_match_records(func, len, enable);
-                return 0;
+                if (ftrace_match_records(func, len, enable))
+                        return 0;
+                return ret;
         }
 
         /* command found */
@@ -2221,10 +2208,9 @@ ftrace_regex_write(struct file *file, const char __user *ubuf,
             !trace_parser_cont(parser)) {
                 ret = ftrace_process_regex(parser->buffer,
                                            parser->idx, enable);
+                trace_parser_clear(parser);
                 if (ret)
                         goto out_unlock;
-
-                trace_parser_clear(parser);
         }
 
         ret = read;
@@ -2312,6 +2298,32 @@ static int __init set_ftrace_filter(char *str)
 }
 __setup("ftrace_filter=", set_ftrace_filter);
 
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+static char ftrace_graph_buf[FTRACE_FILTER_SIZE] __initdata;
+static int __init set_graph_function(char *str)
+{
+        strlcpy(ftrace_graph_buf, str, FTRACE_FILTER_SIZE);
+        return 1;
+}
+__setup("ftrace_graph_filter=", set_graph_function);
+
+static void __init set_ftrace_early_graph(char *buf)
+{
+        int ret;
+        char *func;
+
+        while (buf) {
+                func = strsep(&buf, ",");
+                /* we allow only one expression at a time */
+                ret = ftrace_set_func(ftrace_graph_funcs, &ftrace_graph_count,
+                                      func);
+                if (ret)
+                        printk(KERN_DEBUG "ftrace: function %s not "
+                                          "traceable\n", func);
+        }
+}
+#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
+
 static void __init set_ftrace_early_filter(char *buf, int enable)
 {
         char *func;
@@ -2328,6 +2340,10 @@ static void __init set_ftrace_early_filters(void)
                 set_ftrace_early_filter(ftrace_filter_buf, 1);
         if (ftrace_notrace_buf[0])
                 set_ftrace_early_filter(ftrace_notrace_buf, 0);
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+        if (ftrace_graph_buf[0])
+                set_ftrace_early_graph(ftrace_graph_buf);
+#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
 }
 
 static int
@@ -2513,7 +2529,7 @@ ftrace_set_func(unsigned long *array, int *idx, char *buffer)
                 return -ENODEV;
 
         /* decode regex */
-        type = ftrace_setup_glob(buffer, strlen(buffer), &search, &not);
+        type = filter_parse_regex(buffer, strlen(buffer), &search, &not);
         if (not)
                 return -EINVAL;
 
@@ -2536,10 +2552,9 @@ ftrace_set_func(unsigned long *array, int *idx, char *buffer)
                                         exists = true;
                                         break;
                                 }
-                        if (!exists) {
+                        if (!exists)
                                 array[(*idx)++] = rec->ip;
-                                found = 1;
-                        }
+                        found = 1;
                 }
         } while_for_each_ftrace_rec();
 
@@ -2624,7 +2639,7 @@ static __init int ftrace_init_dyn_debugfs(struct dentry *d_tracer)
         return 0;
 }
 
-static int ftrace_convert_nops(struct module *mod,
+static int ftrace_process_locs(struct module *mod,
                                unsigned long *start,
                                unsigned long *end)
 {
@@ -2684,7 +2699,7 @@ static void ftrace_init_module(struct module *mod,
 {
         if (ftrace_disabled || start == end)
                 return;
-        ftrace_convert_nops(mod, start, end);
+        ftrace_process_locs(mod, start, end);
 }
 
 static int ftrace_module_notify(struct notifier_block *self,
@@ -2745,7 +2760,7 @@ void __init ftrace_init(void)
 
         last_ftrace_enabled = ftrace_enabled = 1;
 
-        ret = ftrace_convert_nops(NULL,
+        ret = ftrace_process_locs(NULL,
                                   __start_mcount_loc,
                                   __stop_mcount_loc);
 
@@ -2778,23 +2793,6 @@ static inline void ftrace_startup_enable(int command) { }
 # define ftrace_shutdown_sysctl()       do { } while (0)
 #endif /* CONFIG_DYNAMIC_FTRACE */
 
-static ssize_t
-ftrace_pid_read(struct file *file, char __user *ubuf,
-                       size_t cnt, loff_t *ppos)
-{
-        char buf[64];
-        int r;
-
-        if (ftrace_pid_trace == ftrace_swapper_pid)
-                r = sprintf(buf, "swapper tasks\n");
-        else if (ftrace_pid_trace)
-                r = sprintf(buf, "%u\n", pid_vnr(ftrace_pid_trace));
-        else
-                r = sprintf(buf, "no pid\n");
-
-        return simple_read_from_buffer(ubuf, cnt, ppos, buf, r);
-}
-
 static void clear_ftrace_swapper(void)
 {
         struct task_struct *p;
@@ -2845,14 +2843,12 @@ static void set_ftrace_pid(struct pid *pid)
         rcu_read_unlock();
 }
 
-static void clear_ftrace_pid_task(struct pid **pid)
+static void clear_ftrace_pid_task(struct pid *pid)
 {
-        if (*pid == ftrace_swapper_pid)
+        if (pid == ftrace_swapper_pid)
                 clear_ftrace_swapper();
         else
-                clear_ftrace_pid(*pid);
-
-        *pid = NULL;
+                clear_ftrace_pid(pid);
 }
 
 static void set_ftrace_pid_task(struct pid *pid)
@@ -2863,74 +2859,184 @@ static void set_ftrace_pid_task(struct pid *pid)
                 set_ftrace_pid(pid);
 }
 
-static ssize_t
-ftrace_pid_write(struct file *filp, const char __user *ubuf,
-                   size_t cnt, loff_t *ppos)
+static int ftrace_pid_add(int p)
 {
         struct pid *pid;
-        char buf[64];
-        long val;
-        int ret;
+        struct ftrace_pid *fpid;
+        int ret = -EINVAL;
 
-        if (cnt >= sizeof(buf))
-                return -EINVAL;
+        mutex_lock(&ftrace_lock);
 
-        if (copy_from_user(&buf, ubuf, cnt))
-                return -EFAULT;
+        if (!p)
+                pid = ftrace_swapper_pid;
+        else
+                pid = find_get_pid(p);
 
-        buf[cnt] = 0;
+        if (!pid)
+                goto out;
 
-        ret = strict_strtol(buf, 10, &val);
-        if (ret < 0)
-                return ret;
+        ret = 0;
 
-        mutex_lock(&ftrace_lock);
-        if (val < 0) {
-                /* disable pid tracing */
-                if (!ftrace_pid_trace)
-                        goto out;
+        list_for_each_entry(fpid, &ftrace_pids, list)
+                if (fpid->pid == pid)
+                        goto out_put;
 
-                clear_ftrace_pid_task(&ftrace_pid_trace);
+        ret = -ENOMEM;
 
-        } else {
-                /* swapper task is special */
-                if (!val) {
-                        pid = ftrace_swapper_pid;
-                        if (pid == ftrace_pid_trace)
-                                goto out;
-                } else {
-                        pid = find_get_pid(val);
+        fpid = kmalloc(sizeof(*fpid), GFP_KERNEL);
+        if (!fpid)
+                goto out_put;
 
-                        if (pid == ftrace_pid_trace) {
-                                put_pid(pid);
-                                goto out;
-                        }
-                }
+        list_add(&fpid->list, &ftrace_pids);
+        fpid->pid = pid;
 
-                if (ftrace_pid_trace)
-                        clear_ftrace_pid_task(&ftrace_pid_trace);
+        set_ftrace_pid_task(pid);
 
-                if (!pid)
-                        goto out;
+        ftrace_update_pid_func();
+        ftrace_startup_enable(0);
+
+        mutex_unlock(&ftrace_lock);
+        return 0;
+
+out_put:
+        if (pid != ftrace_swapper_pid)
+                put_pid(pid);
 
-                ftrace_pid_trace = pid;
+out:
+        mutex_unlock(&ftrace_lock);
+        return ret;
+}
+
+static void ftrace_pid_reset(void)
+{
+        struct ftrace_pid *fpid, *safe;
 
-                set_ftrace_pid_task(ftrace_pid_trace);
+        mutex_lock(&ftrace_lock);
+        list_for_each_entry_safe(fpid, safe, &ftrace_pids, list) {
+                struct pid *pid = fpid->pid;
+
+                clear_ftrace_pid_task(pid);
+
+                list_del(&fpid->list);
+                kfree(fpid);
         }
 
-        /* update the function call */
         ftrace_update_pid_func();
         ftrace_startup_enable(0);
 
- out:
         mutex_unlock(&ftrace_lock);
+}
 
-        return cnt;
+static void *fpid_start(struct seq_file *m, loff_t *pos)
+{
+        mutex_lock(&ftrace_lock);
+
+        if (list_empty(&ftrace_pids) && (!*pos))
+                return (void *) 1;
+
+        return seq_list_start(&ftrace_pids, *pos);
+}
+
+static void *fpid_next(struct seq_file *m, void *v, loff_t *pos)
+{
+        if (v == (void *)1)
+                return NULL;
+
+        return seq_list_next(v, &ftrace_pids, pos);
+}
+
+static void fpid_stop(struct seq_file *m, void *p)
+{
+        mutex_unlock(&ftrace_lock);
+}
+
+static int fpid_show(struct seq_file *m, void *v)
+{
+        const struct ftrace_pid *fpid = list_entry(v, struct ftrace_pid, list);
+
+        if (v == (void *)1) {
+                seq_printf(m, "no pid\n");
+                return 0;
+        }
+
+        if (fpid->pid == ftrace_swapper_pid)
+                seq_printf(m, "swapper tasks\n");
+        else
+                seq_printf(m, "%u\n", pid_vnr(fpid->pid));
+
+        return 0;
+}
+
+static const struct seq_operations ftrace_pid_sops = {
+        .start = fpid_start,
+        .next = fpid_next,
+        .stop = fpid_stop,
+        .show = fpid_show,
+};
+
+static int
+ftrace_pid_open(struct inode *inode, struct file *file)
+{
+        int ret = 0;
+
+        if ((file->f_mode & FMODE_WRITE) &&
+            (file->f_flags & O_TRUNC))
+                ftrace_pid_reset();
+
+        if (file->f_mode & FMODE_READ)
+                ret = seq_open(file, &ftrace_pid_sops);
+
+        return ret;
+}
+
+static ssize_t
+ftrace_pid_write(struct file *filp, const char __user *ubuf,
+                   size_t cnt, loff_t *ppos)
+{
+        char buf[64], *tmp;
+        long val;
+        int ret;
+
+        if (cnt >= sizeof(buf))
+                return -EINVAL;
+
+        if (copy_from_user(&buf, ubuf, cnt))
+                return -EFAULT;
+
+        buf[cnt] = 0;
+
+        /*
+         * Allow "echo > set_ftrace_pid" or "echo -n '' > set_ftrace_pid"
+         * to clean the filter quietly.
+         */
+        tmp = strstrip(buf);
+        if (strlen(tmp) == 0)
+                return 1;
+
+        ret = strict_strtol(tmp, 10, &val);
+        if (ret < 0)
+                return ret;
+
+        ret = ftrace_pid_add(val);
+
+        return ret ? ret : cnt;
+}
+
+static int
+ftrace_pid_release(struct inode *inode, struct file *file)
+{
+        if (file->f_mode & FMODE_READ)
+                seq_release(inode, file);
+
+        return 0;
 }
 
 static const struct file_operations ftrace_pid_fops = {
-        .read = ftrace_pid_read,
-        .write = ftrace_pid_write,
+        .open           = ftrace_pid_open,
+        .write          = ftrace_pid_write,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = ftrace_pid_release,
 };
 
 static __init int ftrace_init_debugfs(void)
@@ -3293,4 +3399,3 @@ void ftrace_graph_stop(void)
         ftrace_stop();
 }
 #endif
-
diff --git a/kernel/trace/power-traces.c b/kernel/trace/power-traces.c
index e06c6e3d56a3..9f4f565b01e6 100644
--- a/kernel/trace/power-traces.c
+++ b/kernel/trace/power-traces.c
@@ -14,7 +14,5 @@
 #define CREATE_TRACE_POINTS
 #include <trace/events/power.h>
 
-EXPORT_TRACEPOINT_SYMBOL_GPL(power_start);
-EXPORT_TRACEPOINT_SYMBOL_GPL(power_end);
 EXPORT_TRACEPOINT_SYMBOL_GPL(power_frequency);
 
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 5dd017fea6f5..2326b04c95c4 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -397,18 +397,21 @@ int ring_buffer_print_page_header(struct trace_seq *s)
         int ret;
 
         ret = trace_seq_printf(s, "\tfield: u64 timestamp;\t"
-                               "offset:0;\tsize:%u;\n",
-                               (unsigned int)sizeof(field.time_stamp));
+                               "offset:0;\tsize:%u;\tsigned:%u;\n",
+                               (unsigned int)sizeof(field.time_stamp),
+                               (unsigned int)is_signed_type(u64));
 
         ret = trace_seq_printf(s, "\tfield: local_t commit;\t"
-                               "offset:%u;\tsize:%u;\n",
+                               "offset:%u;\tsize:%u;\tsigned:%u;\n",
                                (unsigned int)offsetof(typeof(field), commit),
-                               (unsigned int)sizeof(field.commit));
+                               (unsigned int)sizeof(field.commit),
+                               (unsigned int)is_signed_type(long));
 
         ret = trace_seq_printf(s, "\tfield: char data;\t"
-                               "offset:%u;\tsize:%u;\n",
+                               "offset:%u;\tsize:%u;\tsigned:%u;\n",
                                (unsigned int)offsetof(typeof(field), data),
-                               (unsigned int)BUF_PAGE_SIZE);
+                               (unsigned int)BUF_PAGE_SIZE,
+                               (unsigned int)is_signed_type(char));
 
         return ret;
 }
@@ -420,7 +423,7 @@ struct ring_buffer_per_cpu {
         int                             cpu;
         struct ring_buffer              *buffer;
         spinlock_t                      reader_lock;    /* serialize readers */
-        raw_spinlock_t                  lock;
+        arch_spinlock_t                 lock;
         struct lock_class_key           lock_key;
         struct list_head                *pages;
         struct buffer_page              *head_page;     /* read from head */
@@ -995,7 +998,7 @@ rb_allocate_cpu_buffer(struct ring_buffer *buffer, int cpu)
         cpu_buffer->buffer = buffer;
         spin_lock_init(&cpu_buffer->reader_lock);
         lockdep_set_class(&cpu_buffer->reader_lock, buffer->reader_lock_key);
-        cpu_buffer->lock = (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
+        cpu_buffer->lock = (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
 
         bpage = kzalloc_node(ALIGN(sizeof(*bpage), cache_line_size()),
                             GFP_KERNEL, cpu_to_node(cpu));
@@ -1190,9 +1193,6 @@ rb_remove_pages(struct ring_buffer_per_cpu *cpu_buffer, unsigned nr_pages)
         struct list_head *p;
         unsigned i;
 
-        atomic_inc(&cpu_buffer->record_disabled);
-        synchronize_sched();
-
         spin_lock_irq(&cpu_buffer->reader_lock);
         rb_head_page_deactivate(cpu_buffer);
 
@@ -1208,12 +1208,9 @@ rb_remove_pages(struct ring_buffer_per_cpu *cpu_buffer, unsigned nr_pages)
                 return;
 
         rb_reset_cpu(cpu_buffer);
-        spin_unlock_irq(&cpu_buffer->reader_lock);
-
         rb_check_pages(cpu_buffer);
 
-        atomic_dec(&cpu_buffer->record_disabled);
-
+        spin_unlock_irq(&cpu_buffer->reader_lock);
 }
 
 static void
@@ -1224,9 +1221,6 @@ rb_insert_pages(struct ring_buffer_per_cpu *cpu_buffer,
         struct list_head *p;
         unsigned i;
 
-        atomic_inc(&cpu_buffer->record_disabled);
-        synchronize_sched();
-
         spin_lock_irq(&cpu_buffer->reader_lock);
         rb_head_page_deactivate(cpu_buffer);
 
@@ -1239,11 +1233,9 @@ rb_insert_pages(struct ring_buffer_per_cpu *cpu_buffer,
                 list_add_tail(&bpage->list, cpu_buffer->pages);
         }
         rb_reset_cpu(cpu_buffer);
-        spin_unlock_irq(&cpu_buffer->reader_lock);
-
         rb_check_pages(cpu_buffer);
 
-        atomic_dec(&cpu_buffer->record_disabled);
+        spin_unlock_irq(&cpu_buffer->reader_lock);
 }
 
 /**
@@ -1251,11 +1243,6 @@ rb_insert_pages(struct ring_buffer_per_cpu *cpu_buffer,
  * @buffer: the buffer to resize.
  * @size: the new size.
  *
- * The tracer is responsible for making sure that the buffer is
- * not being used while changing the size.
- * Note: We may be able to change the above requirement by using
- *  RCU synchronizations.
- *
  * Minimum size is 2 * BUF_PAGE_SIZE.
  *
  * Returns -1 on failure.
@@ -1287,6 +1274,11 @@ int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size)
         if (size == buffer_size)
                 return size;
 
+        atomic_inc(&buffer->record_disabled);
+
+        /* Make sure all writers are done with this buffer. */
+        synchronize_sched();
+
         mutex_lock(&buffer->mutex);
         get_online_cpus();
 
@@ -1349,6 +1341,8 @@ int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size)
         put_online_cpus();
         mutex_unlock(&buffer->mutex);
 
+        atomic_dec(&buffer->record_disabled);
+
         return size;
 
  free_pages:
@@ -1358,6 +1352,7 @@ int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size)
         }
         put_online_cpus();
         mutex_unlock(&buffer->mutex);
+        atomic_dec(&buffer->record_disabled);
         return -ENOMEM;
 
         /*
@@ -1367,6 +1362,7 @@ int ring_buffer_resize(struct ring_buffer *buffer, unsigned long size)
  out_fail:
         put_online_cpus();
         mutex_unlock(&buffer->mutex);
+        atomic_dec(&buffer->record_disabled);
         return -1;
 }
 EXPORT_SYMBOL_GPL(ring_buffer_resize);
@@ -1787,9 +1783,9 @@ rb_reset_tail(struct ring_buffer_per_cpu *cpu_buffer,
 static struct ring_buffer_event *
 rb_move_tail(struct ring_buffer_per_cpu *cpu_buffer,
              unsigned long length, unsigned long tail,
-             struct buffer_page *commit_page,
              struct buffer_page *tail_page, u64 *ts)
 {
+        struct buffer_page *commit_page = cpu_buffer->commit_page;
         struct ring_buffer *buffer = cpu_buffer->buffer;
         struct buffer_page *next_page;
         int ret;
@@ -1892,13 +1888,10 @@ static struct ring_buffer_event *
 __rb_reserve_next(struct ring_buffer_per_cpu *cpu_buffer,
                   unsigned type, unsigned long length, u64 *ts)
 {
-        struct buffer_page *tail_page, *commit_page;
+        struct buffer_page *tail_page;
         struct ring_buffer_event *event;
         unsigned long tail, write;
 
-        commit_page = cpu_buffer->commit_page;
-        /* we just need to protect against interrupts */
-        barrier();
         tail_page = cpu_buffer->tail_page;
         write = local_add_return(length, &tail_page->write);
 
@@ -1909,7 +1902,7 @@ __rb_reserve_next(struct ring_buffer_per_cpu *cpu_buffer,
         /* See if we shot pass the end of this buffer page */
         if (write > BUF_PAGE_SIZE)
                 return rb_move_tail(cpu_buffer, length, tail,
-                                    commit_page, tail_page, ts);
+                                    tail_page, ts);
 
         /* We reserved something on the buffer */
 
@@ -2834,7 +2827,7 @@ rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
         int ret;
 
         local_irq_save(flags);
-        __raw_spin_lock(&cpu_buffer->lock);
+        arch_spin_lock(&cpu_buffer->lock);
 
  again:
         /*
@@ -2923,7 +2916,7 @@ rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
         goto again;
 
  out:
-        __raw_spin_unlock(&cpu_buffer->lock);
+        arch_spin_unlock(&cpu_buffer->lock);
         local_irq_restore(flags);
 
         return reader;
@@ -3286,9 +3279,9 @@ ring_buffer_read_start(struct ring_buffer *buffer, int cpu)
         synchronize_sched();
 
         spin_lock_irqsave(&cpu_buffer->reader_lock, flags);
-        __raw_spin_lock(&cpu_buffer->lock);
+        arch_spin_lock(&cpu_buffer->lock);
         rb_iter_reset(iter);
-        __raw_spin_unlock(&cpu_buffer->lock);
+        arch_spin_unlock(&cpu_buffer->lock);
         spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);
 
         return iter;
@@ -3408,11 +3401,11 @@ void ring_buffer_reset_cpu(struct ring_buffer *buffer, int cpu)
         if (RB_WARN_ON(cpu_buffer, local_read(&cpu_buffer->committing)))
                 goto out;
 
-        __raw_spin_lock(&cpu_buffer->lock);
+        arch_spin_lock(&cpu_buffer->lock);
 
         rb_reset_cpu(cpu_buffer);
 
-        __raw_spin_unlock(&cpu_buffer->lock);
+        arch_spin_unlock(&cpu_buffer->lock);
 
  out:
         spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);
diff --git a/kernel/trace/ring_buffer_benchmark.c b/kernel/trace/ring_buffer_benchmark.c
index 573d3cc762c3..b2477caf09c2 100644
--- a/kernel/trace/ring_buffer_benchmark.c
+++ b/kernel/trace/ring_buffer_benchmark.c
@@ -35,6 +35,28 @@ static int disable_reader;
 module_param(disable_reader, uint, 0644);
 MODULE_PARM_DESC(disable_reader, "only run producer");
 
+static int write_iteration = 50;
+module_param(write_iteration, uint, 0644);
+MODULE_PARM_DESC(write_iteration, "# of writes between timestamp readings");
+
+static int producer_nice = 19;
+static int consumer_nice = 19;
+
+static int producer_fifo = -1;
+static int consumer_fifo = -1;
+
+module_param(producer_nice, uint, 0644);
+MODULE_PARM_DESC(producer_nice, "nice prio for producer");
+
+module_param(consumer_nice, uint, 0644);
+MODULE_PARM_DESC(consumer_nice, "nice prio for consumer");
+
+module_param(producer_fifo, uint, 0644);
+MODULE_PARM_DESC(producer_fifo, "fifo prio for producer");
+
+module_param(consumer_fifo, uint, 0644);
+MODULE_PARM_DESC(consumer_fifo, "fifo prio for consumer");
+
 static int read_events;
 
 static int kill_test;
@@ -208,15 +230,18 @@ static void ring_buffer_producer(void)
         do {
                 struct ring_buffer_event *event;
                 int *entry;
-
-                event = ring_buffer_lock_reserve(buffer, 10);
-                if (!event) {
-                        missed++;
-                } else {
-                        hit++;
-                        entry = ring_buffer_event_data(event);
-                        *entry = smp_processor_id();
-                        ring_buffer_unlock_commit(buffer, event);
+                int i;
+
+                for (i = 0; i < write_iteration; i++) {
+                        event = ring_buffer_lock_reserve(buffer, 10);
+                        if (!event) {
+                                missed++;
+                        } else {
+                                hit++;
+                                entry = ring_buffer_event_data(event);
+                                *entry = smp_processor_id();
+                                ring_buffer_unlock_commit(buffer, event);
+                        }
                 }
                 do_gettimeofday(&end_tv);
 
@@ -263,6 +288,27 @@ static void ring_buffer_producer(void)
 
         if (kill_test)
                 trace_printk("ERROR!\n");
+
+        if (!disable_reader) {
+                if (consumer_fifo < 0)
+                        trace_printk("Running Consumer at nice: %d\n",
+                                     consumer_nice);
+                else
+                        trace_printk("Running Consumer at SCHED_FIFO %d\n",
+                                     consumer_fifo);
+        }
+        if (producer_fifo < 0)
+                trace_printk("Running Producer at nice: %d\n",
+                             producer_nice);
+        else
+                trace_printk("Running Producer at SCHED_FIFO %d\n",
+                             producer_fifo);
+
+        /* Let the user know that the test is running at low priority */
+        if (producer_fifo < 0 && consumer_fifo < 0 &&
+            producer_nice == 19 && consumer_nice == 19)
+                trace_printk("WARNING!!! This test is running at lowest priority.\n");
+
         trace_printk("Time:     %lld (usecs)\n", time);
         trace_printk("Overruns: %lld\n", overruns);
         if (disable_reader)
@@ -392,6 +438,27 @@ static int __init ring_buffer_benchmark_init(void)
         if (IS_ERR(producer))
                 goto out_kill;
 
+        /*
+         * Run them as low-prio background tasks by default:
+         */
+        if (!disable_reader) {
+                if (consumer_fifo >= 0) {
+                        struct sched_param param = {
+                                .sched_priority = consumer_fifo
+                        };
+                        sched_setscheduler(consumer, SCHED_FIFO, &param);
+                } else
+                        set_user_nice(consumer, consumer_nice);
+        }
+
+        if (producer_fifo >= 0) {
+                struct sched_param param = {
+                        .sched_priority = consumer_fifo
+                };
+                sched_setscheduler(producer, SCHED_FIFO, &param);
+        } else
+                set_user_nice(producer, producer_nice);
+
         return 0;
 
  out_kill:
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index b20d3ec75de9..06ba26747d7e 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -86,17 +86,17 @@ static int dummy_set_flag(u32 old_flags, u32 bit, int set)
  */
 static int tracing_disabled = 1;
 
-DEFINE_PER_CPU(local_t, ftrace_cpu_disabled);
+DEFINE_PER_CPU(int, ftrace_cpu_disabled);
 
 static inline void ftrace_disable_cpu(void)
 {
         preempt_disable();
-        local_inc(&__get_cpu_var(ftrace_cpu_disabled));
+        __this_cpu_inc(per_cpu_var(ftrace_cpu_disabled));
 }
 
 static inline void ftrace_enable_cpu(void)
 {
-        local_dec(&__get_cpu_var(ftrace_cpu_disabled));
+        __this_cpu_dec(per_cpu_var(ftrace_cpu_disabled));
         preempt_enable();
 }
 
@@ -129,7 +129,7 @@ static int tracing_set_tracer(const char *buf);
 static char bootup_tracer_buf[MAX_TRACER_SIZE] __initdata;
 static char *default_bootup_tracer;
 
-static int __init set_ftrace(char *str)
+static int __init set_cmdline_ftrace(char *str)
 {
         strncpy(bootup_tracer_buf, str, MAX_TRACER_SIZE);
         default_bootup_tracer = bootup_tracer_buf;
@@ -137,7 +137,7 @@ static int __init set_ftrace(char *str)
         ring_buffer_expanded = 1;
         return 1;
 }
-__setup("ftrace=", set_ftrace);
+__setup("ftrace=", set_cmdline_ftrace);
 
 static int __init set_ftrace_dump_on_oops(char *str)
 {
@@ -203,7 +203,7 @@ cycle_t ftrace_now(int cpu)
  */
 static struct trace_array       max_tr;
 
-static DEFINE_PER_CPU(struct trace_array_cpu, max_data);
+static DEFINE_PER_CPU(struct trace_array_cpu, max_tr_data);
 
 /* tracer_enabled is used to toggle activation of a tracer */
 static int                      tracer_enabled = 1;
@@ -313,7 +313,6 @@ static const char *trace_options[] = {
         "bin",
         "block",
         "stacktrace",
-        "sched-tree",
         "trace_printk",
         "ftrace_preempt",
         "branch",
@@ -493,15 +492,15 @@ static ssize_t trace_seq_to_buffer(struct trace_seq *s, void *buf, size_t cnt)
  * protected by per_cpu spinlocks. But the action of the swap
  * needs its own lock.
  *
- * This is defined as a raw_spinlock_t in order to help
+ * This is defined as a arch_spinlock_t in order to help
  * with performance when lockdep debugging is enabled.
  *
  * It is also used in other places outside the update_max_tr
  * so it needs to be defined outside of the
  * CONFIG_TRACER_MAX_TRACE.
  */
-static raw_spinlock_t ftrace_max_lock =
-        (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
+static arch_spinlock_t ftrace_max_lock =
+        (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
 
 #ifdef CONFIG_TRACER_MAX_TRACE
 unsigned long __read_mostly     tracing_max_latency;
@@ -555,13 +554,13 @@ update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
                 return;
 
         WARN_ON_ONCE(!irqs_disabled());
-        __raw_spin_lock(&ftrace_max_lock);
+        arch_spin_lock(&ftrace_max_lock);
 
         tr->buffer = max_tr.buffer;
         max_tr.buffer = buf;
 
         __update_max_tr(tr, tsk, cpu);
-        __raw_spin_unlock(&ftrace_max_lock);
+        arch_spin_unlock(&ftrace_max_lock);
 }
 
 /**
@@ -581,7 +580,7 @@ update_max_tr_single(struct trace_array *tr, struct task_struct *tsk, int cpu)
                 return;
 
         WARN_ON_ONCE(!irqs_disabled());
-        __raw_spin_lock(&ftrace_max_lock);
+        arch_spin_lock(&ftrace_max_lock);
 
         ftrace_disable_cpu();
 
@@ -603,7 +602,7 @@ update_max_tr_single(struct trace_array *tr, struct task_struct *tsk, int cpu)
         WARN_ON_ONCE(ret && ret != -EAGAIN && ret != -EBUSY);
 
         __update_max_tr(tr, tsk, cpu);
-        __raw_spin_unlock(&ftrace_max_lock);
+        arch_spin_unlock(&ftrace_max_lock);
 }
 #endif /* CONFIG_TRACER_MAX_TRACE */
 
@@ -802,7 +801,7 @@ static unsigned map_pid_to_cmdline[PID_MAX_DEFAULT+1];
 static unsigned map_cmdline_to_pid[SAVED_CMDLINES];
 static char saved_cmdlines[SAVED_CMDLINES][TASK_COMM_LEN];
 static int cmdline_idx;
-static raw_spinlock_t trace_cmdline_lock = __RAW_SPIN_LOCK_UNLOCKED;
+static arch_spinlock_t trace_cmdline_lock = __ARCH_SPIN_LOCK_UNLOCKED;
 
 /* temporary disable recording */
 static atomic_t trace_record_cmdline_disabled __read_mostly;
@@ -915,7 +914,7 @@ static void trace_save_cmdline(struct task_struct *tsk)
          * nor do we want to disable interrupts,
          * so if we miss here, then better luck next time.
          */
-        if (!__raw_spin_trylock(&trace_cmdline_lock))
+        if (!arch_spin_trylock(&trace_cmdline_lock))
                 return;
 
         idx = map_pid_to_cmdline[tsk->pid];
@@ -940,7 +939,7 @@ static void trace_save_cmdline(struct task_struct *tsk)
 
         memcpy(&saved_cmdlines[idx], tsk->comm, TASK_COMM_LEN);
 
-        __raw_spin_unlock(&trace_cmdline_lock);
+        arch_spin_unlock(&trace_cmdline_lock);
 }
 
 void trace_find_cmdline(int pid, char comm[])
@@ -958,14 +957,14 @@ void trace_find_cmdline(int pid, char comm[])
         }
 
         preempt_disable();
-        __raw_spin_lock(&trace_cmdline_lock);
+        arch_spin_lock(&trace_cmdline_lock);
         map = map_pid_to_cmdline[pid];
         if (map != NO_CMDLINE_MAP)
                 strcpy(comm, saved_cmdlines[map]);
         else
                 strcpy(comm, "<...>");
 
-        __raw_spin_unlock(&trace_cmdline_lock);
+        arch_spin_unlock(&trace_cmdline_lock);
         preempt_enable();
 }
 
@@ -1085,7 +1084,7 @@ trace_function(struct trace_array *tr,
         struct ftrace_entry *entry;
 
         /* If we are reading the ring buffer, don't trace */
-        if (unlikely(local_read(&__get_cpu_var(ftrace_cpu_disabled))))
+        if (unlikely(__this_cpu_read(per_cpu_var(ftrace_cpu_disabled))))
                 return;
 
         event = trace_buffer_lock_reserve(buffer, TRACE_FN, sizeof(*entry),
@@ -1151,6 +1150,22 @@ void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,
         __ftrace_trace_stack(tr->buffer, flags, skip, pc);
 }
 
+/**
+ * trace_dump_stack - record a stack back trace in the trace buffer
+ */
+void trace_dump_stack(void)
+{
+        unsigned long flags;
+
+        if (tracing_disabled || tracing_selftest_running)
+                return;
+
+        local_save_flags(flags);
+
+        /* skipping 3 traces, seems to get us at the caller of this function */
+        __ftrace_trace_stack(global_trace.buffer, flags, 3, preempt_count());
+}
+
 void
 ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, int pc)
 {
@@ -1251,8 +1266,8 @@ ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3)
  */
 int trace_vbprintk(unsigned long ip, const char *fmt, va_list args)
 {
-        static raw_spinlock_t trace_buf_lock =
-                (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
+        static arch_spinlock_t trace_buf_lock =
+                (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
         static u32 trace_buf[TRACE_BUF_SIZE];
 
         struct ftrace_event_call *call = &event_bprint;
@@ -1283,7 +1298,7 @@ int trace_vbprintk(unsigned long ip, const char *fmt, va_list args)
 
         /* Lockdep uses trace_printk for lock tracing */
         local_irq_save(flags);
-        __raw_spin_lock(&trace_buf_lock);
+        arch_spin_lock(&trace_buf_lock);
         len = vbin_printf(trace_buf, TRACE_BUF_SIZE, fmt, args);
 
         if (len > TRACE_BUF_SIZE || len < 0)
@@ -1304,7 +1319,7 @@ int trace_vbprintk(unsigned long ip, const char *fmt, va_list args)
                 ring_buffer_unlock_commit(buffer, event);
 
 out_unlock:
-        __raw_spin_unlock(&trace_buf_lock);
+        arch_spin_unlock(&trace_buf_lock);
         local_irq_restore(flags);
 
 out:
@@ -1334,7 +1349,7 @@ int trace_array_printk(struct trace_array *tr,
 int trace_array_vprintk(struct trace_array *tr,
                         unsigned long ip, const char *fmt, va_list args)
 {
-        static raw_spinlock_t trace_buf_lock = __RAW_SPIN_LOCK_UNLOCKED;
+        static arch_spinlock_t trace_buf_lock = __ARCH_SPIN_LOCK_UNLOCKED;
         static char trace_buf[TRACE_BUF_SIZE];
 
         struct ftrace_event_call *call = &event_print;
@@ -1360,12 +1375,9 @@ int trace_array_vprintk(struct trace_array *tr,
 
         pause_graph_tracing();
         raw_local_irq_save(irq_flags);
-        __raw_spin_lock(&trace_buf_lock);
+        arch_spin_lock(&trace_buf_lock);
         len = vsnprintf(trace_buf, TRACE_BUF_SIZE, fmt, args);
 
-        len = min(len, TRACE_BUF_SIZE-1);
-        trace_buf[len] = 0;
-
         size = sizeof(*entry) + len + 1;
         buffer = tr->buffer;
         event = trace_buffer_lock_reserve(buffer, TRACE_PRINT, size,
@@ -1373,15 +1385,15 @@ int trace_array_vprintk(struct trace_array *tr,
         if (!event)
                 goto out_unlock;
         entry = ring_buffer_event_data(event);
-        entry->ip                       = ip;
+        entry->ip = ip;
 
         memcpy(&entry->buf, trace_buf, len);
-        entry->buf[len] = 0;
+        entry->buf[len] = '\0';
         if (!filter_check_discard(call, entry, buffer, event))
                 ring_buffer_unlock_commit(buffer, event);
 
  out_unlock:
-        __raw_spin_unlock(&trace_buf_lock);
+        arch_spin_unlock(&trace_buf_lock);
         raw_local_irq_restore(irq_flags);
         unpause_graph_tracing();
  out:
@@ -1515,6 +1527,8 @@ static void *s_next(struct seq_file *m, void *v, loff_t *pos)
         int i = (int)*pos;
         void *ent;
 
+        WARN_ON_ONCE(iter->leftover);
+
         (*pos)++;
 
         /* can't go backwards */
@@ -1613,8 +1627,16 @@ static void *s_start(struct seq_file *m, loff_t *pos)
                         ;
 
         } else {
-                l = *pos - 1;
-                p = s_next(m, p, &l);
+                /*
+                 * If we overflowed the seq_file before, then we want
+                 * to just reuse the trace_seq buffer again.
+                 */
+                if (iter->leftover)
+                        p = iter;
+                else {
+                        l = *pos - 1;
+                        p = s_next(m, p, &l);
+                }
         }
 
         trace_event_read_lock();
@@ -1922,6 +1944,7 @@ static enum print_line_t print_trace_line(struct trace_iterator *iter)
 static int s_show(struct seq_file *m, void *v)
 {
         struct trace_iterator *iter = v;
+        int ret;
 
         if (iter->ent == NULL) {
                 if (iter->tr) {
@@ -1941,9 +1964,27 @@ static int s_show(struct seq_file *m, void *v)
                         if (!(trace_flags & TRACE_ITER_VERBOSE))
                                 print_func_help_header(m);
                 }
+        } else if (iter->leftover) {
+                /*
+                 * If we filled the seq_file buffer earlier, we
+                 * want to just show it now.
+                 */
+                ret = trace_print_seq(m, &iter->seq);
+
+                /* ret should this time be zero, but you never know */
+                iter->leftover = ret;
+
         } else {
                 print_trace_line(iter);
-                trace_print_seq(m, &iter->seq);
+                ret = trace_print_seq(m, &iter->seq);
+                /*
+                 * If we overflow the seq_file buffer, then it will
+                 * ask us for this data again at start up.
+                 * Use that instead.
+                 *  ret is 0 if seq_file write succeeded.
+                 *        -1 otherwise.
+                 */
+                iter->leftover = ret;
         }
 
         return 0;
@@ -2253,7 +2294,7 @@ tracing_cpumask_write(struct file *filp, const char __user *ubuf,
         mutex_lock(&tracing_cpumask_update_lock);
 
         local_irq_disable();
-        __raw_spin_lock(&ftrace_max_lock);
+        arch_spin_lock(&ftrace_max_lock);
         for_each_tracing_cpu(cpu) {
                 /*
                  * Increase/decrease the disabled counter if we are
@@ -2268,7 +2309,7 @@ tracing_cpumask_write(struct file *filp, const char __user *ubuf,
                         atomic_dec(&global_trace.data[cpu]->disabled);
                 }
         }
-        __raw_spin_unlock(&ftrace_max_lock);
+        arch_spin_unlock(&ftrace_max_lock);
         local_irq_enable();
 
         cpumask_copy(tracing_cpumask, tracing_cpumask_new);
@@ -2290,67 +2331,49 @@ static const struct file_operations tracing_cpumask_fops = {
         .write          = tracing_cpumask_write,
 };
 
-static ssize_t
-tracing_trace_options_read(struct file *filp, char __user *ubuf,
-                       size_t cnt, loff_t *ppos)
+static int tracing_trace_options_show(struct seq_file *m, void *v)
 {
         struct tracer_opt *trace_opts;
         u32 tracer_flags;
-        int len = 0;
-        char *buf;
-        int r = 0;
         int i;
 
-
-        /* calculate max size */
-        for (i = 0; trace_options[i]; i++) {
-                len += strlen(trace_options[i]);
-                len += 3; /* "no" and newline */
-        }
-
         mutex_lock(&trace_types_lock);
         tracer_flags = current_trace->flags->val;
         trace_opts = current_trace->flags->opts;
 
-        /*
-         * Increase the size with names of options specific
-         * of the current tracer.
-         */
-        for (i = 0; trace_opts[i].name; i++) {
-                len += strlen(trace_opts[i].name);
-                len += 3; /* "no" and newline */
-        }
-
-        /* +1 for \0 */
-        buf = kmalloc(len + 1, GFP_KERNEL);
-        if (!buf) {
-                mutex_unlock(&trace_types_lock);
-                return -ENOMEM;
-        }
-
         for (i = 0; trace_options[i]; i++) {
                 if (trace_flags & (1 << i))
-                        r += sprintf(buf + r, "%s\n", trace_options[i]);
+                        seq_printf(m, "%s\n", trace_options[i]);
                 else
-                        r += sprintf(buf + r, "no%s\n", trace_options[i]);
+                        seq_printf(m, "no%s\n", trace_options[i]);
         }
 
         for (i = 0; trace_opts[i].name; i++) {
                 if (tracer_flags & trace_opts[i].bit)
-                        r += sprintf(buf + r, "%s\n",
-                                trace_opts[i].name);
+                        seq_printf(m, "%s\n", trace_opts[i].name);
                 else
-                        r += sprintf(buf + r, "no%s\n",
-                                trace_opts[i].name);
+                        seq_printf(m, "no%s\n", trace_opts[i].name);
         }
         mutex_unlock(&trace_types_lock);
 
-        WARN_ON(r >= len + 1);
+        return 0;
+}
 
-        r = simple_read_from_buffer(ubuf, cnt, ppos, buf, r);
+static int __set_tracer_option(struct tracer *trace,
+                               struct tracer_flags *tracer_flags,
+                               struct tracer_opt *opts, int neg)
+{
+        int ret;
 
-        kfree(buf);
-        return r;
+        ret = trace->set_flag(tracer_flags->val, opts->bit, !neg);
+        if (ret)
+                return ret;
+
+        if (neg)
+                tracer_flags->val &= ~opts->bit;
+        else
+                tracer_flags->val |= opts->bit;
+        return 0;
 }
 
 /* Try to assign a tracer specific option */
@@ -2358,33 +2381,17 @@ static int set_tracer_option(struct tracer *trace, char *cmp, int neg)
 {
         struct tracer_flags *tracer_flags = trace->flags;
         struct tracer_opt *opts = NULL;
-        int ret = 0, i = 0;
-        int len;
+        int i;
 
         for (i = 0; tracer_flags->opts[i].name; i++) {
                 opts = &tracer_flags->opts[i];
-                len = strlen(opts->name);
 
-                if (strncmp(cmp, opts->name, len) == 0) {
-                        ret = trace->set_flag(tracer_flags->val,
-                                opts->bit, !neg);
-                        break;
-                }
+                if (strcmp(cmp, opts->name) == 0)
+                        return __set_tracer_option(trace, trace->flags,
+                                                   opts, neg);
         }
-        /* Not found */
-        if (!tracer_flags->opts[i].name)
-                return -EINVAL;
-
-        /* Refused to handle */
-        if (ret)
-                return ret;
-
-        if (neg)
-                tracer_flags->val &= ~opts->bit;
-        else
-                tracer_flags->val |= opts->bit;
 
-        return 0;
+        return -EINVAL;
 }
 
 static void set_tracer_flags(unsigned int mask, int enabled)
@@ -2404,7 +2411,7 @@ tracing_trace_options_write(struct file *filp, const char __user *ubuf,
                         size_t cnt, loff_t *ppos)
 {
         char buf[64];
-        char *cmp = buf;
+        char *cmp;
         int neg = 0;
         int ret;
         int i;
@@ -2416,16 +2423,15 @@ tracing_trace_options_write(struct file *filp, const char __user *ubuf,
                 return -EFAULT;
 
         buf[cnt] = 0;
+        cmp = strstrip(buf);
 
-        if (strncmp(buf, "no", 2) == 0) {
+        if (strncmp(cmp, "no", 2) == 0) {
                 neg = 1;
                 cmp += 2;
         }
 
         for (i = 0; trace_options[i]; i++) {
-                int len = strlen(trace_options[i]);
-
-                if (strncmp(cmp, trace_options[i], len) == 0) {
+                if (strcmp(cmp, trace_options[i]) == 0) {
                         set_tracer_flags(1 << i, !neg);
                         break;
                 }
@@ -2445,9 +2451,18 @@ tracing_trace_options_write(struct file *filp, const char __user *ubuf,
         return cnt;
 }
 
+static int tracing_trace_options_open(struct inode *inode, struct file *file)
+{
+        if (tracing_disabled)
+                return -ENODEV;
+        return single_open(file, tracing_trace_options_show, NULL);
+}
+
 static const struct file_operations tracing_iter_fops = {
-        .open           = tracing_open_generic,
-        .read           = tracing_trace_options_read,
+        .open           = tracing_trace_options_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
         .write          = tracing_trace_options_write,
 };
 
@@ -2897,6 +2912,10 @@ static int tracing_release_pipe(struct inode *inode, struct file *file)
         else
                 cpumask_clear_cpu(iter->cpu_file, tracing_reader_cpumask);
 
+
+        if (iter->trace->pipe_close)
+                iter->trace->pipe_close(iter);
+
         mutex_unlock(&trace_types_lock);
 
         free_cpumask_var(iter->started);
@@ -3103,7 +3122,7 @@ static void tracing_spd_release_pipe(struct splice_pipe_desc *spd,
         __free_page(spd->pages[idx]);
 }
 
-static struct pipe_buf_operations tracing_pipe_buf_ops = {
+static const struct pipe_buf_operations tracing_pipe_buf_ops = {
         .can_merge              = 0,
         .map                    = generic_pipe_buf_map,
         .unmap                  = generic_pipe_buf_unmap,
@@ -3334,7 +3353,6 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
                                         size_t cnt, loff_t *fpos)
 {
         char *buf;
-        char *end;
 
         if (tracing_disabled)
                 return -EINVAL;
@@ -3342,7 +3360,7 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
         if (cnt > TRACE_BUF_SIZE)
                 cnt = TRACE_BUF_SIZE;
 
-        buf = kmalloc(cnt + 1, GFP_KERNEL);
+        buf = kmalloc(cnt + 2, GFP_KERNEL);
         if (buf == NULL)
                 return -ENOMEM;
 
@@ -3350,35 +3368,31 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
                 kfree(buf);
                 return -EFAULT;
         }
+        if (buf[cnt-1] != '\n') {
+                buf[cnt] = '\n';
+                buf[cnt+1] = '\0';
+        } else
+                buf[cnt] = '\0';
 
-        /* Cut from the first nil or newline. */
-        buf[cnt] = '\0';
-        end = strchr(buf, '\n');
-        if (end)
-                *end = '\0';
-
-        cnt = mark_printk("%s\n", buf);
+        cnt = mark_printk("%s", buf);
         kfree(buf);
         *fpos += cnt;
 
         return cnt;
 }
 
-static ssize_t tracing_clock_read(struct file *filp, char __user *ubuf,
-                                  size_t cnt, loff_t *ppos)
+static int tracing_clock_show(struct seq_file *m, void *v)
 {
-        char buf[64];
-        int bufiter = 0;
         int i;
 
         for (i = 0; i < ARRAY_SIZE(trace_clocks); i++)
-                bufiter += snprintf(buf + bufiter, sizeof(buf) - bufiter,
+                seq_printf(m,
                         "%s%s%s%s", i ? " " : "",
                         i == trace_clock_id ? "[" : "", trace_clocks[i].name,
                         i == trace_clock_id ? "]" : "");
-        bufiter += snprintf(buf + bufiter, sizeof(buf) - bufiter, "\n");
+        seq_putc(m, '\n');
 
-        return simple_read_from_buffer(ubuf, cnt, ppos, buf, bufiter);
+        return 0;
 }
 
 static ssize_t tracing_clock_write(struct file *filp, const char __user *ubuf,
@@ -3420,6 +3434,13 @@ static ssize_t tracing_clock_write(struct file *filp, const char __user *ubuf,
         return cnt;
 }
 
+static int tracing_clock_open(struct inode *inode, struct file *file)
+{
+        if (tracing_disabled)
+                return -ENODEV;
+        return single_open(file, tracing_clock_show, NULL);
+}
+
 static const struct file_operations tracing_max_lat_fops = {
         .open           = tracing_open_generic,
         .read           = tracing_max_lat_read,
@@ -3458,8 +3479,10 @@ static const struct file_operations tracing_mark_fops = {
 };
 
 static const struct file_operations trace_clock_fops = {
-        .open           = tracing_open_generic,
-        .read           = tracing_clock_read,
+        .open           = tracing_clock_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
         .write          = tracing_clock_write,
 };
 
@@ -3589,7 +3612,7 @@ static void buffer_pipe_buf_get(struct pipe_inode_info *pipe,
 }
 
 /* Pipe buffer operations for a buffer. */
-static struct pipe_buf_operations buffer_pipe_buf_ops = {
+static const struct pipe_buf_operations buffer_pipe_buf_ops = {
         .can_merge              = 0,
         .map                    = generic_pipe_buf_map,
         .unmap                  = generic_pipe_buf_unmap,
@@ -3730,7 +3753,7 @@ tracing_stats_read(struct file *filp, char __user *ubuf,
 
         s = kmalloc(sizeof(*s), GFP_KERNEL);
         if (!s)
-                return ENOMEM;
+                return -ENOMEM;
 
         trace_seq_init(s);
 
@@ -3920,39 +3943,16 @@ trace_options_write(struct file *filp, const char __user *ubuf, size_t cnt,
         if (ret < 0)
                 return ret;
 
-        ret = 0;
-        switch (val) {
-        case 0:
-                /* do nothing if already cleared */
-                if (!(topt->flags->val & topt->opt->bit))
-                        break;
-
-                mutex_lock(&trace_types_lock);
-                if (current_trace->set_flag)
-                        ret = current_trace->set_flag(topt->flags->val,
-                                                      topt->opt->bit, 0);
-                mutex_unlock(&trace_types_lock);
-                if (ret)
-                        return ret;
-                topt->flags->val &= ~topt->opt->bit;
-                break;
-        case 1:
-                /* do nothing if already set */
-                if (topt->flags->val & topt->opt->bit)
-                        break;
+        if (val != 0 && val != 1)
+                return -EINVAL;
 
+        if (!!(topt->flags->val & topt->opt->bit) != val) {
                 mutex_lock(&trace_types_lock);
-                if (current_trace->set_flag)
-                        ret = current_trace->set_flag(topt->flags->val,
-                                                      topt->opt->bit, 1);
+                ret = __set_tracer_option(current_trace, topt->flags,
+                                          topt->opt, val);
                 mutex_unlock(&trace_types_lock);
                 if (ret)
                         return ret;
-                topt->flags->val |= topt->opt->bit;
-                break;
-
-        default:
-                return -EINVAL;
         }
 
         *ppos += cnt;
@@ -4279,8 +4279,8 @@ trace_printk_seq(struct trace_seq *s)
 
 static void __ftrace_dump(bool disable_tracing)
 {
-        static raw_spinlock_t ftrace_dump_lock =
-                (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
+        static arch_spinlock_t ftrace_dump_lock =
+                (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
         /* use static because iter can be a bit big for the stack */
         static struct trace_iterator iter;
         unsigned int old_userobj;
@@ -4290,7 +4290,7 @@ static void __ftrace_dump(bool disable_tracing)
 
         /* only one dump */
         local_irq_save(flags);
-        __raw_spin_lock(&ftrace_dump_lock);
+        arch_spin_lock(&ftrace_dump_lock);
         if (dump_ran)
                 goto out;
 
@@ -4365,7 +4365,7 @@ static void __ftrace_dump(bool disable_tracing)
         }
 
  out:
-        __raw_spin_unlock(&ftrace_dump_lock);
+        arch_spin_unlock(&ftrace_dump_lock);
         local_irq_restore(flags);
 }
 
@@ -4426,7 +4426,7 @@ __init static int tracer_alloc_buffers(void)
         /* Allocate the first page for all buffers */
         for_each_tracing_cpu(i) {
                 global_trace.data[i] = &per_cpu(global_trace_cpu, i);
-                max_tr.data[i] = &per_cpu(max_data, i);
+                max_tr.data[i] = &per_cpu(max_tr_data, i);
         }
 
         trace_init_cmdlines();
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 405cb850b75d..4df6a77eb196 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -11,6 +11,7 @@
 #include <linux/ftrace.h>
 #include <trace/boot.h>
 #include <linux/kmemtrace.h>
+#include <linux/hw_breakpoint.h>
 
 #include <linux/trace_seq.h>
 #include <linux/ftrace_event.h>
@@ -37,6 +38,7 @@ enum trace_type {
         TRACE_KMEM_ALLOC,
         TRACE_KMEM_FREE,
         TRACE_BLK,
+        TRACE_KSYM,
 
         __TRACE_LAST_TYPE,
 };
@@ -98,9 +100,32 @@ struct syscall_trace_enter {
 struct syscall_trace_exit {
         struct trace_entry      ent;
         int                     nr;
-        unsigned long           ret;
+        long                    ret;
 };
 
+struct kprobe_trace_entry {
+        struct trace_entry      ent;
+        unsigned long           ip;
+        int                     nargs;
+        unsigned long           args[];
+};
+
+#define SIZEOF_KPROBE_TRACE_ENTRY(n)                    \
+        (offsetof(struct kprobe_trace_entry, args) +    \
+        (sizeof(unsigned long) * (n)))
+
+struct kretprobe_trace_entry {
+        struct trace_entry      ent;
+        unsigned long           func;
+        unsigned long           ret_ip;
+        int                     nargs;
+        unsigned long           args[];
+};
+
+#define SIZEOF_KRETPROBE_TRACE_ENTRY(n)                 \
+        (offsetof(struct kretprobe_trace_entry, args) + \
+        (sizeof(unsigned long) * (n)))
+
 /*
  * trace_flag_type is an enumeration that holds different
  * states when a trace occurs. These are:
@@ -209,6 +234,7 @@ extern void __ftrace_bad_type(void);
                           TRACE_KMEM_ALLOC);    \
                 IF_ASSIGN(var, ent, struct kmemtrace_free_entry,        \
                           TRACE_KMEM_FREE);     \
+                IF_ASSIGN(var, ent, struct ksym_trace_entry, TRACE_KSYM);\
                 __ftrace_bad_type();                                    \
         } while (0)
 
@@ -246,6 +272,7 @@ struct tracer_flags {
  * @pipe_open: called when the trace_pipe file is opened
  * @wait_pipe: override how the user waits for traces on trace_pipe
  * @close: called when the trace file is released
+ * @pipe_close: called when the trace_pipe file is released
  * @read: override the default read callback on trace_pipe
  * @splice_read: override the default splice_read callback on trace_pipe
  * @selftest: selftest to run on boot (see trace_selftest.c)
@@ -264,6 +291,7 @@ struct tracer {
         void                    (*pipe_open)(struct trace_iterator *iter);
         void                    (*wait_pipe)(struct trace_iterator *iter);
         void                    (*close)(struct trace_iterator *iter);
+        void                    (*pipe_close)(struct trace_iterator *iter);
         ssize_t                 (*read)(struct trace_iterator *iter,
                                         struct file *filp, char __user *ubuf,
                                         size_t cnt, loff_t *ppos);
@@ -364,6 +392,8 @@ int register_tracer(struct tracer *type);
 void unregister_tracer(struct tracer *type);
 int is_tracing_stopped(void);
 
+extern int process_new_ksym_entry(char *ksymname, int op, unsigned long addr);
+
 extern unsigned long nsecs_to_usecs(unsigned long nsecs);
 
 #ifdef CONFIG_TRACER_MAX_TRACE
@@ -413,7 +443,7 @@ extern int DYN_FTRACE_TEST_NAME(void);
 
 extern int ring_buffer_expanded;
 extern bool tracing_selftest_disabled;
-DECLARE_PER_CPU(local_t, ftrace_cpu_disabled);
+DECLARE_PER_CPU(int, ftrace_cpu_disabled);
 
 #ifdef CONFIG_FTRACE_STARTUP_TEST
 extern int trace_selftest_startup_function(struct tracer *trace,
@@ -438,6 +468,8 @@ extern int trace_selftest_startup_branch(struct tracer *trace,
                                          struct trace_array *tr);
 extern int trace_selftest_startup_hw_branches(struct tracer *trace,
                                               struct trace_array *tr);
+extern int trace_selftest_startup_ksym(struct tracer *trace,
+                                         struct trace_array *tr);
 #endif /* CONFIG_FTRACE_STARTUP_TEST */
 
 extern void *head_page(struct trace_array_cpu *data);
@@ -483,10 +515,6 @@ static inline int ftrace_graph_addr(unsigned long addr)
         return 0;
 }
 #else
-static inline int ftrace_trace_addr(unsigned long addr)
-{
-        return 1;
-}
 static inline int ftrace_graph_addr(unsigned long addr)
 {
         return 1;
@@ -500,12 +528,12 @@ print_graph_function(struct trace_iterator *iter)
 }
 #endif /* CONFIG_FUNCTION_GRAPH_TRACER */
 
-extern struct pid *ftrace_pid_trace;
+extern struct list_head ftrace_pids;
 
 #ifdef CONFIG_FUNCTION_TRACER
 static inline int ftrace_trace_task(struct task_struct *task)
 {
-        if (!ftrace_pid_trace)
+        if (list_empty(&ftrace_pids))
                 return 1;
 
         return test_tsk_trace_trace(task);
@@ -569,18 +597,17 @@ enum trace_iterator_flags {
         TRACE_ITER_BIN                  = 0x40,
         TRACE_ITER_BLOCK                = 0x80,
         TRACE_ITER_STACKTRACE           = 0x100,
-        TRACE_ITER_SCHED_TREE           = 0x200,
-        TRACE_ITER_PRINTK               = 0x400,
-        TRACE_ITER_PREEMPTONLY          = 0x800,
-        TRACE_ITER_BRANCH               = 0x1000,
-        TRACE_ITER_ANNOTATE             = 0x2000,
-        TRACE_ITER_USERSTACKTRACE       = 0x4000,
-        TRACE_ITER_SYM_USEROBJ          = 0x8000,
-        TRACE_ITER_PRINTK_MSGONLY       = 0x10000,
-        TRACE_ITER_CONTEXT_INFO         = 0x20000, /* Print pid/cpu/time */
-        TRACE_ITER_LATENCY_FMT          = 0x40000,
-        TRACE_ITER_SLEEP_TIME           = 0x80000,
-        TRACE_ITER_GRAPH_TIME           = 0x100000,
+        TRACE_ITER_PRINTK               = 0x200,
+        TRACE_ITER_PREEMPTONLY          = 0x400,
+        TRACE_ITER_BRANCH               = 0x800,
+        TRACE_ITER_ANNOTATE             = 0x1000,
+        TRACE_ITER_USERSTACKTRACE       = 0x2000,
+        TRACE_ITER_SYM_USEROBJ          = 0x4000,
+        TRACE_ITER_PRINTK_MSGONLY       = 0x8000,
+        TRACE_ITER_CONTEXT_INFO         = 0x10000, /* Print pid/cpu/time */
+        TRACE_ITER_LATENCY_FMT          = 0x20000,
+        TRACE_ITER_SLEEP_TIME           = 0x40000,
+        TRACE_ITER_GRAPH_TIME           = 0x80000,
 };
 
 /*
@@ -687,7 +714,6 @@ struct event_filter {
         int                     n_preds;
         struct filter_pred      **preds;
         char                    *filter_string;
-        bool                    no_reset;
 };
 
 struct event_subsystem {
@@ -699,22 +725,40 @@ struct event_subsystem {
 };
 
 struct filter_pred;
+struct regex;
 
 typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event,
                                  int val1, int val2);
 
+typedef int (*regex_match_func)(char *str, struct regex *r, int len);
+
+enum regex_type {
+        MATCH_FULL = 0,
+        MATCH_FRONT_ONLY,
+        MATCH_MIDDLE_ONLY,
+        MATCH_END_ONLY,
+};
+
+struct regex {
+        char                    pattern[MAX_FILTER_STR_VAL];
+        int                     len;
+        int                     field_len;
+        regex_match_func        match;
+};
+
 struct filter_pred {
-        filter_pred_fn_t fn;
-        u64 val;
-        char str_val[MAX_FILTER_STR_VAL];
-        int str_len;
-        char *field_name;
-        int offset;
-        int not;
-        int op;
-        int pop_n;
+        filter_pred_fn_t        fn;
+        u64                     val;
+        struct regex            regex;
+        char                    *field_name;
+        int                     offset;
+        int                     not;
+        int                     op;
+        int                     pop_n;
 };
 
+extern enum regex_type
+filter_parse_regex(char *buff, int len, char **search, int *not);
 extern void print_event_filter(struct ftrace_event_call *call,
                                struct trace_seq *s);
 extern int apply_event_filter(struct ftrace_event_call *call,
@@ -730,7 +774,8 @@ filter_check_discard(struct ftrace_event_call *call, void *rec,
                      struct ring_buffer *buffer,
                      struct ring_buffer_event *event)
 {
-        if (unlikely(call->filter_active) && !filter_match_preds(call, rec)) {
+        if (unlikely(call->filter_active) &&
+            !filter_match_preds(call->filter, rec)) {
                 ring_buffer_discard_commit(buffer, event);
                 return 1;
         }
diff --git a/kernel/trace/trace_clock.c b/kernel/trace/trace_clock.c
index 20c5f92e28a8..84a3a7ba072a 100644
--- a/kernel/trace/trace_clock.c
+++ b/kernel/trace/trace_clock.c
@@ -20,6 +20,8 @@
 #include <linux/ktime.h>
 #include <linux/trace_clock.h>
 
+#include "trace.h"
+
 /*
  * trace_clock_local(): the simplest and least coherent tracing clock.
  *
@@ -28,17 +30,17 @@
  */
 u64 notrace trace_clock_local(void)
 {
-        unsigned long flags;
         u64 clock;
+        int resched;
 
         /*
          * sched_clock() is an architecture implemented, fast, scalable,
          * lockless clock. It is not guaranteed to be coherent across
          * CPUs, nor across CPU idle events.
          */
-        raw_local_irq_save(flags);
+        resched = ftrace_preempt_disable();
         clock = sched_clock();
-        raw_local_irq_restore(flags);
+        ftrace_preempt_enable(resched);
 
         return clock;
 }
@@ -69,10 +71,10 @@ u64 notrace trace_clock(void)
 /* keep prev_time and lock in the same cacheline. */
 static struct {
         u64 prev_time;
-        raw_spinlock_t lock;
+        arch_spinlock_t lock;
 } trace_clock_struct ____cacheline_aligned_in_smp =
         {
-                .lock = (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED,
+                .lock = (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED,
         };
 
 u64 notrace trace_clock_global(void)
@@ -92,7 +94,7 @@ u64 notrace trace_clock_global(void)
         if (unlikely(in_nmi()))
                 goto out;
 
-        __raw_spin_lock(&trace_clock_struct.lock);
+        arch_spin_lock(&trace_clock_struct.lock);
 
         /*
          * TODO: if this happens often then maybe we should reset
@@ -104,7 +106,7 @@ u64 notrace trace_clock_global(void)
 
         trace_clock_struct.prev_time = now;
 
-        __raw_spin_unlock(&trace_clock_struct.lock);
+        arch_spin_unlock(&trace_clock_struct.lock);
 
  out:
         raw_local_irq_restore(flags);
diff --git a/kernel/trace/trace_entries.h b/kernel/trace/trace_entries.h
index ead3d724599d..c16a08f399df 100644
--- a/kernel/trace/trace_entries.h
+++ b/kernel/trace/trace_entries.h
@@ -364,3 +364,19 @@ FTRACE_ENTRY(kmem_free, kmemtrace_free_entry,
         F_printk("type:%u call_site:%lx ptr:%p",
                  __entry->type_id, __entry->call_site, __entry->ptr)
 );
+
+FTRACE_ENTRY(ksym_trace, ksym_trace_entry,
+
+        TRACE_KSYM,
+
+        F_STRUCT(
+                __field(        unsigned long,  ip                        )
+                __field(        unsigned char,  type                      )
+                __array(        char         ,  cmd,       TASK_COMM_LEN  )
+                __field(        unsigned long,  addr                      )
+        ),
+
+        F_printk("ip: %pF type: %d ksym_name: %pS cmd: %s",
+                (void *)__entry->ip, (unsigned int)__entry->type,
+                (void *)__entry->addr,  __entry->cmd)
+);
diff --git a/kernel/trace/trace_event_profile.c b/kernel/trace/trace_event_profile.c
index 8d5c171cc998..9e25573242cf 100644
--- a/kernel/trace/trace_event_profile.c
+++ b/kernel/trace/trace_event_profile.c
@@ -8,17 +8,14 @@
 #include <linux/module.h>
 #include "trace.h"
 
-/*
- * We can't use a size but a type in alloc_percpu()
- * So let's create a dummy type that matches the desired size
- */
-typedef struct {char buf[FTRACE_MAX_PROFILE_SIZE];} profile_buf_t;
 
-char            *trace_profile_buf;
-EXPORT_SYMBOL_GPL(trace_profile_buf);
+char *perf_trace_buf;
+EXPORT_SYMBOL_GPL(perf_trace_buf);
+
+char *perf_trace_buf_nmi;
+EXPORT_SYMBOL_GPL(perf_trace_buf_nmi);
 
-char            *trace_profile_buf_nmi;
-EXPORT_SYMBOL_GPL(trace_profile_buf_nmi);
+typedef typeof(char [FTRACE_MAX_PROFILE_SIZE]) perf_trace_t ;
 
 /* Count the events in use (per event id, not per instance) */
 static int      total_profile_count;
@@ -28,24 +25,24 @@ static int ftrace_profile_enable_event(struct ftrace_event_call *event)
         char *buf;
         int ret = -ENOMEM;
 
-        if (atomic_inc_return(&event->profile_count))
+        if (event->profile_count++ > 0)
                 return 0;
 
         if (!total_profile_count) {
-                buf = (char *)alloc_percpu(profile_buf_t);
+                buf = (char *)alloc_percpu(perf_trace_t);
                 if (!buf)
                         goto fail_buf;
 
-                rcu_assign_pointer(trace_profile_buf, buf);
+                rcu_assign_pointer(perf_trace_buf, buf);
 
-                buf = (char *)alloc_percpu(profile_buf_t);
+                buf = (char *)alloc_percpu(perf_trace_t);
                 if (!buf)
                         goto fail_buf_nmi;
 
-                rcu_assign_pointer(trace_profile_buf_nmi, buf);
+                rcu_assign_pointer(perf_trace_buf_nmi, buf);
         }
 
-        ret = event->profile_enable();
+        ret = event->profile_enable(event);
         if (!ret) {
                 total_profile_count++;
                 return 0;
@@ -53,13 +50,13 @@ static int ftrace_profile_enable_event(struct ftrace_event_call *event)
 
 fail_buf_nmi:
         if (!total_profile_count) {
-                free_percpu(trace_profile_buf_nmi);
-                free_percpu(trace_profile_buf);
-                trace_profile_buf_nmi = NULL;
-                trace_profile_buf = NULL;
+                free_percpu(perf_trace_buf_nmi);
+                free_percpu(perf_trace_buf);
+                perf_trace_buf_nmi = NULL;
+                perf_trace_buf = NULL;
         }
 fail_buf:
-        atomic_dec(&event->profile_count);
+        event->profile_count--;
 
         return ret;
 }
@@ -86,17 +83,17 @@ static void ftrace_profile_disable_event(struct ftrace_event_call *event)
 {
         char *buf, *nmi_buf;
 
-        if (!atomic_add_negative(-1, &event->profile_count))
+        if (--event->profile_count > 0)
                 return;
 
-        event->profile_disable();
+        event->profile_disable(event);
 
         if (!--total_profile_count) {
-                buf = trace_profile_buf;
-                rcu_assign_pointer(trace_profile_buf, NULL);
+                buf = perf_trace_buf;
+                rcu_assign_pointer(perf_trace_buf, NULL);
 
-                nmi_buf = trace_profile_buf_nmi;
-                rcu_assign_pointer(trace_profile_buf_nmi, NULL);
+                nmi_buf = perf_trace_buf_nmi;
+                rcu_assign_pointer(perf_trace_buf_nmi, NULL);
 
                 /*
                  * Ensure every events in profiling have finished before
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index d128f65778e6..189b09baf4fb 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -78,7 +78,7 @@ EXPORT_SYMBOL_GPL(trace_define_field);
         if (ret)                                                        \
                 return ret;
 
-int trace_define_common_fields(struct ftrace_event_call *call)
+static int trace_define_common_fields(struct ftrace_event_call *call)
 {
         int ret;
         struct trace_entry ent;
@@ -91,11 +91,8 @@ int trace_define_common_fields(struct ftrace_event_call *call)
 
         return ret;
 }
-EXPORT_SYMBOL_GPL(trace_define_common_fields);
 
-#ifdef CONFIG_MODULES
-
-static void trace_destroy_fields(struct ftrace_event_call *call)
+void trace_destroy_fields(struct ftrace_event_call *call)
 {
         struct ftrace_event_field *field, *next;
 
@@ -107,27 +104,49 @@ static void trace_destroy_fields(struct ftrace_event_call *call)
         }
 }
 
-#endif /* CONFIG_MODULES */
+int trace_event_raw_init(struct ftrace_event_call *call)
+{
+        int id;
+
+        id = register_ftrace_event(call->event);
+        if (!id)
+                return -ENODEV;
+        call->id = id;
+        INIT_LIST_HEAD(&call->fields);
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(trace_event_raw_init);
 
-static void ftrace_event_enable_disable(struct ftrace_event_call *call,
+static int ftrace_event_enable_disable(struct ftrace_event_call *call,
                                         int enable)
 {
+        int ret = 0;
+
         switch (enable) {
         case 0:
                 if (call->enabled) {
                         call->enabled = 0;
                         tracing_stop_cmdline_record();
-                        call->unregfunc(call->data);
+                        call->unregfunc(call);
                 }
                 break;
         case 1:
                 if (!call->enabled) {
-                        call->enabled = 1;
                         tracing_start_cmdline_record();
-                        call->regfunc(call->data);
+                        ret = call->regfunc(call);
+                        if (ret) {
+                                tracing_stop_cmdline_record();
+                                pr_info("event trace: Could not enable event "
+                                        "%s\n", call->name);
+                                break;
+                        }
+                        call->enabled = 1;
                 }
                 break;
         }
+
+        return ret;
 }
 
 static void ftrace_clear_events(void)
@@ -406,7 +425,7 @@ event_enable_write(struct file *filp, const char __user *ubuf, size_t cnt,
         case 0:
         case 1:
                 mutex_lock(&event_mutex);
-                ftrace_event_enable_disable(call, val);
+                ret = ftrace_event_enable_disable(call, val);
                 mutex_unlock(&event_mutex);
                 break;
 
@@ -416,7 +435,7 @@ event_enable_write(struct file *filp, const char __user *ubuf, size_t cnt,
 
         *ppos += cnt;
 
-        return cnt;
+        return ret ? ret : cnt;
 }
 
 static ssize_t
@@ -507,7 +526,7 @@ extern char *__bad_type_size(void);
 #define FIELD(type, name)                                               \
         sizeof(type) != sizeof(field.name) ? __bad_type_size() :        \
         #type, "common_" #name, offsetof(typeof(field), name),          \
-                sizeof(field.name)
+                sizeof(field.name), is_signed_type(type)
 
 static int trace_write_header(struct trace_seq *s)
 {
@@ -515,17 +534,17 @@ static int trace_write_header(struct trace_seq *s)
 
         /* struct trace_entry */
         return trace_seq_printf(s,
-                                "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
-                                "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
-                                "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
-                                "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
-                                "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
-                                "\n",
-                                FIELD(unsigned short, type),
-                                FIELD(unsigned char, flags),
-                                FIELD(unsigned char, preempt_count),
-                                FIELD(int, pid),
-                                FIELD(int, lock_depth));
+                        "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\tsigned:%u;\n"
+                        "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\tsigned:%u;\n"
+                        "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\tsigned:%u;\n"
+                        "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\tsigned:%u;\n"
+                        "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\tsigned:%u;\n"
+                        "\n",
+                        FIELD(unsigned short, type),
+                        FIELD(unsigned char, flags),
+                        FIELD(unsigned char, preempt_count),
+                        FIELD(int, pid),
+                        FIELD(int, lock_depth));
 }
 
 static ssize_t
@@ -878,9 +897,9 @@ event_subsystem_dir(const char *name, struct dentry *d_events)
                            "'%s/filter' entry\n", name);
         }
 
-        entry = trace_create_file("enable", 0644, system->entry,
-                                  (void *)system->name,
-                                  &ftrace_system_enable_fops);
+        trace_create_file("enable", 0644, system->entry,
+                          (void *)system->name,
+                          &ftrace_system_enable_fops);
 
         return system->entry;
 }
@@ -892,7 +911,6 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
                  const struct file_operations *filter,
                  const struct file_operations *format)
 {
-        struct dentry *entry;
         int ret;
 
         /*
@@ -910,55 +928,76 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
         }
 
         if (call->regfunc)
-                entry = trace_create_file("enable", 0644, call->dir, call,
-                                          enable);
+                trace_create_file("enable", 0644, call->dir, call,
+                                  enable);
 
         if (call->id && call->profile_enable)
-                entry = trace_create_file("id", 0444, call->dir, call,
-                                          id);
+                trace_create_file("id", 0444, call->dir, call,
+                                  id);
 
         if (call->define_fields) {
-                ret = call->define_fields(call);
+                ret = trace_define_common_fields(call);
+                if (!ret)
+                        ret = call->define_fields(call);
                 if (ret < 0) {
                         pr_warning("Could not initialize trace point"
                                    " events/%s\n", call->name);
                         return ret;
                 }
-                entry = trace_create_file("filter", 0644, call->dir, call,
-                                          filter);
+                trace_create_file("filter", 0644, call->dir, call,
+                                  filter);
         }
 
         /* A trace may not want to export its format */
         if (!call->show_format)
                 return 0;
 
-        entry = trace_create_file("format", 0444, call->dir, call,
-                                  format);
+        trace_create_file("format", 0444, call->dir, call,
+                          format);
 
         return 0;
 }
 
-#define for_each_event(event, start, end)                       \
-        for (event = start;                                     \
-             (unsigned long)event < (unsigned long)end;         \
-             event++)
+static int __trace_add_event_call(struct ftrace_event_call *call)
+{
+        struct dentry *d_events;
+        int ret;
 
-#ifdef CONFIG_MODULES
+        if (!call->name)
+                return -EINVAL;
 
-static LIST_HEAD(ftrace_module_file_list);
+        if (call->raw_init) {
+                ret = call->raw_init(call);
+                if (ret < 0) {
+                        if (ret != -ENOSYS)
+                                pr_warning("Could not initialize trace "
+                                "events/%s\n", call->name);
+                        return ret;
+                }
+        }
 
-/*
- * Modules must own their file_operations to keep up with
- * reference counting.
- */
-struct ftrace_module_file_ops {
-        struct list_head                list;
-        struct module                   *mod;
-        struct file_operations          id;
-        struct file_operations          enable;
-        struct file_operations          format;
-        struct file_operations          filter;
-};
+        d_events = event_trace_events_dir();
+        if (!d_events)
+                return -ENOENT;
+
+        ret = event_create_dir(call, d_events, &ftrace_event_id_fops,
+                                &ftrace_enable_fops, &ftrace_event_filter_fops,
+                                &ftrace_event_format_fops);
+        if (!ret)
+                list_add(&call->list, &ftrace_events);
+
+        return ret;
+}
+
+/* Add an additional event_call dynamically */
+int trace_add_event_call(struct ftrace_event_call *call)
+{
+        int ret;
+        mutex_lock(&event_mutex);
+        ret = __trace_add_event_call(call);
+        mutex_unlock(&event_mutex);
+        return ret;
+}
 
 static void remove_subsystem_dir(const char *name)
 {
@@ -986,6 +1025,53 @@ static void remove_subsystem_dir(const char *name)
         }
 }
 
+/*
+ * Must be called under locking both of event_mutex and trace_event_mutex.
+ */
+static void __trace_remove_event_call(struct ftrace_event_call *call)
+{
+        ftrace_event_enable_disable(call, 0);
+        if (call->event)
+                __unregister_ftrace_event(call->event);
+        debugfs_remove_recursive(call->dir);
+        list_del(&call->list);
+        trace_destroy_fields(call);
+        destroy_preds(call);
+        remove_subsystem_dir(call->system);
+}
+
+/* Remove an event_call */
+void trace_remove_event_call(struct ftrace_event_call *call)
+{
+        mutex_lock(&event_mutex);
+        down_write(&trace_event_mutex);
+        __trace_remove_event_call(call);
+        up_write(&trace_event_mutex);
+        mutex_unlock(&event_mutex);
+}
+
+#define for_each_event(event, start, end)                       \
+        for (event = start;                                     \
+             (unsigned long)event < (unsigned long)end;         \
+             event++)
+
+#ifdef CONFIG_MODULES
+
+static LIST_HEAD(ftrace_module_file_list);
+
+/*
+ * Modules must own their file_operations to keep up with
+ * reference counting.
+ */
+struct ftrace_module_file_ops {
+        struct list_head                list;
+        struct module                   *mod;
+        struct file_operations          id;
+        struct file_operations          enable;
+        struct file_operations          format;
+        struct file_operations          filter;
+};
+
 static struct ftrace_module_file_ops *
 trace_create_file_ops(struct module *mod)
 {
@@ -1043,7 +1129,7 @@ static void trace_module_add_events(struct module *mod)
                 if (!call->name)
                         continue;
                 if (call->raw_init) {
-                        ret = call->raw_init();
+                        ret = call->raw_init(call);
                         if (ret < 0) {
                                 if (ret != -ENOSYS)
                                         pr_warning("Could not initialize trace "
@@ -1061,10 +1147,11 @@ static void trace_module_add_events(struct module *mod)
                                 return;
                 }
                 call->mod = mod;
-                list_add(&call->list, &ftrace_events);
-                event_create_dir(call, d_events,
-                                 &file_ops->id, &file_ops->enable,
-                                 &file_ops->filter, &file_ops->format);
+                ret = event_create_dir(call, d_events,
+                                       &file_ops->id, &file_ops->enable,
+                                       &file_ops->filter, &file_ops->format);
+                if (!ret)
+                        list_add(&call->list, &ftrace_events);
         }
 }
 
@@ -1078,14 +1165,7 @@ static void trace_module_remove_events(struct module *mod)
         list_for_each_entry_safe(call, p, &ftrace_events, list) {
                 if (call->mod == mod) {
                         found = true;
-                        ftrace_event_enable_disable(call, 0);
-                        if (call->event)
-                                __unregister_ftrace_event(call->event);
-                        debugfs_remove_recursive(call->dir);
-                        list_del(&call->list);
-                        trace_destroy_fields(call);
-                        destroy_preds(call);
-                        remove_subsystem_dir(call->system);
+                        __trace_remove_event_call(call);
                 }
         }
 
@@ -1203,7 +1283,7 @@ static __init int event_trace_init(void)
                 if (!call->name)
                         continue;
                 if (call->raw_init) {
-                        ret = call->raw_init();
+                        ret = call->raw_init(call);
                         if (ret < 0) {
                                 if (ret != -ENOSYS)
                                         pr_warning("Could not initialize trace "
@@ -1211,10 +1291,12 @@ static __init int event_trace_init(void)
                                 continue;
                         }
                 }
-                list_add(&call->list, &ftrace_events);
-                event_create_dir(call, d_events, &ftrace_event_id_fops,
-                                 &ftrace_enable_fops, &ftrace_event_filter_fops,
-                                 &ftrace_event_format_fops);
+                ret = event_create_dir(call, d_events, &ftrace_event_id_fops,
+                                       &ftrace_enable_fops,
+                                       &ftrace_event_filter_fops,
+                                       &ftrace_event_format_fops);
+                if (!ret)
+                        list_add(&call->list, &ftrace_events);
         }
 
         while (true) {
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 98a6cc5c64ed..50504cb228de 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -18,11 +18,10 @@
  * Copyright (C) 2009 Tom Zanussi <tzanussi@gmail.com>
  */
 
-#include <linux/debugfs.h>
-#include <linux/uaccess.h>
 #include <linux/module.h>
 #include <linux/ctype.h>
 #include <linux/mutex.h>
+#include <linux/perf_event.h>
 
 #include "trace.h"
 #include "trace_output.h"
@@ -31,6 +30,7 @@ enum filter_op_ids
 {
         OP_OR,
         OP_AND,
+        OP_GLOB,
         OP_NE,
         OP_EQ,
         OP_LT,
@@ -48,16 +48,17 @@ struct filter_op {
 };
 
 static struct filter_op filter_ops[] = {
-        { OP_OR, "||", 1 },
-        { OP_AND, "&&", 2 },
-        { OP_NE, "!=", 4 },
-        { OP_EQ, "==", 4 },
-        { OP_LT, "<", 5 },
-        { OP_LE, "<=", 5 },
-        { OP_GT, ">", 5 },
-        { OP_GE, ">=", 5 },
-        { OP_NONE, "OP_NONE", 0 },
-        { OP_OPEN_PAREN, "(", 0 },
+        { OP_OR,        "||",           1 },
+        { OP_AND,       "&&",           2 },
+        { OP_GLOB,      "~",            4 },
+        { OP_NE,        "!=",           4 },
+        { OP_EQ,        "==",           4 },
+        { OP_LT,        "<",            5 },
+        { OP_LE,        "<=",           5 },
+        { OP_GT,        ">",            5 },
+        { OP_GE,        ">=",           5 },
+        { OP_NONE,      "OP_NONE",      0 },
+        { OP_OPEN_PAREN, "(",           0 },
 };
 
 enum {
@@ -197,9 +198,9 @@ static int filter_pred_string(struct filter_pred *pred, void *event,
         char *addr = (char *)(event + pred->offset);
         int cmp, match;
 
-        cmp = strncmp(addr, pred->str_val, pred->str_len);
+        cmp = pred->regex.match(addr, &pred->regex, pred->regex.field_len);
 
-        match = (!cmp) ^ pred->not;
+        match = cmp ^ pred->not;
 
         return match;
 }
@@ -211,9 +212,9 @@ static int filter_pred_pchar(struct filter_pred *pred, void *event,
         char **addr = (char **)(event + pred->offset);
         int cmp, match;
 
-        cmp = strncmp(*addr, pred->str_val, pred->str_len);
+        cmp = pred->regex.match(*addr, &pred->regex, pred->regex.field_len);
 
-        match = (!cmp) ^ pred->not;
+        match = cmp ^ pred->not;
 
         return match;
 }
@@ -237,9 +238,9 @@ static int filter_pred_strloc(struct filter_pred *pred, void *event,
         char *addr = (char *)(event + str_loc);
         int cmp, match;
 
-        cmp = strncmp(addr, pred->str_val, str_len);
+        cmp = pred->regex.match(addr, &pred->regex, str_len);
 
-        match = (!cmp) ^ pred->not;
+        match = cmp ^ pred->not;
 
         return match;
 }
@@ -250,10 +251,121 @@ static int filter_pred_none(struct filter_pred *pred, void *event,
         return 0;
 }
 
+/* Basic regex callbacks */
+static int regex_match_full(char *str, struct regex *r, int len)
+{
+        if (strncmp(str, r->pattern, len) == 0)
+                return 1;
+        return 0;
+}
+
+static int regex_match_front(char *str, struct regex *r, int len)
+{
+        if (strncmp(str, r->pattern, len) == 0)
+                return 1;
+        return 0;
+}
+
+static int regex_match_middle(char *str, struct regex *r, int len)
+{
+        if (strstr(str, r->pattern))
+                return 1;
+        return 0;
+}
+
+static int regex_match_end(char *str, struct regex *r, int len)
+{
+        char *ptr = strstr(str, r->pattern);
+
+        if (ptr && (ptr[r->len] == 0))
+                return 1;
+        return 0;
+}
+
+/**
+ * filter_parse_regex - parse a basic regex
+ * @buff:   the raw regex
+ * @len:    length of the regex
+ * @search: will point to the beginning of the string to compare
+ * @not:    tell whether the match will have to be inverted
+ *
+ * This passes in a buffer containing a regex and this function will
+ * set search to point to the search part of the buffer and
+ * return the type of search it is (see enum above).
+ * This does modify buff.
+ *
+ * Returns enum type.
+ *  search returns the pointer to use for comparison.
+ *  not returns 1 if buff started with a '!'
+ *     0 otherwise.
+ */
+enum regex_type filter_parse_regex(char *buff, int len, char **search, int *not)
+{
+        int type = MATCH_FULL;
+        int i;
+
+        if (buff[0] == '!') {
+                *not = 1;
+                buff++;
+                len--;
+        } else
+                *not = 0;
+
+        *search = buff;
+
+        for (i = 0; i < len; i++) {
+                if (buff[i] == '*') {
+                        if (!i) {
+                                *search = buff + 1;
+                                type = MATCH_END_ONLY;
+                        } else {
+                                if (type == MATCH_END_ONLY)
+                                        type = MATCH_MIDDLE_ONLY;
+                                else
+                                        type = MATCH_FRONT_ONLY;
+                                buff[i] = 0;
+                                break;
+                        }
+                }
+        }
+
+        return type;
+}
+
+static void filter_build_regex(struct filter_pred *pred)
+{
+        struct regex *r = &pred->regex;
+        char *search;
+        enum regex_type type = MATCH_FULL;
+        int not = 0;
+
+        if (pred->op == OP_GLOB) {
+                type = filter_parse_regex(r->pattern, r->len, &search, &not);
+                r->len = strlen(search);
+                memmove(r->pattern, search, r->len+1);
+        }
+
+        switch (type) {
+        case MATCH_FULL:
+                r->match = regex_match_full;
+                break;
+        case MATCH_FRONT_ONLY:
+                r->match = regex_match_front;
+                break;
+        case MATCH_MIDDLE_ONLY:
+                r->match = regex_match_middle;
+                break;
+        case MATCH_END_ONLY:
+                r->match = regex_match_end;
+                break;
+        }
+
+        pred->not ^= not;
+}
+
 /* return 1 if event matches, 0 otherwise (discard) */
-int filter_match_preds(struct ftrace_event_call *call, void *rec)
+int filter_match_preds(struct event_filter *filter, void *rec)
 {
-        struct event_filter *filter = call->filter;
         int match, top = 0, val1 = 0, val2 = 0;
         int stack[MAX_FILTER_PRED];
         struct filter_pred *pred;
@@ -396,7 +508,7 @@ static void filter_clear_pred(struct filter_pred *pred)
 {
         kfree(pred->field_name);
         pred->field_name = NULL;
-        pred->str_len = 0;
+        pred->regex.len = 0;
 }
 
 static int filter_set_pred(struct filter_pred *dest,
@@ -426,9 +538,8 @@ static void filter_disable_preds(struct ftrace_event_call *call)
                 filter->preds[i]->fn = filter_pred_none;
 }
 
-void destroy_preds(struct ftrace_event_call *call)
+static void __free_preds(struct event_filter *filter)
 {
-        struct event_filter *filter = call->filter;
         int i;
 
         if (!filter)
@@ -441,21 +552,24 @@ void destroy_preds(struct ftrace_event_call *call)
         kfree(filter->preds);
         kfree(filter->filter_string);
         kfree(filter);
+}
+
+void destroy_preds(struct ftrace_event_call *call)
+{
+        __free_preds(call->filter);
         call->filter = NULL;
+        call->filter_active = 0;
 }
 
-static int init_preds(struct ftrace_event_call *call)
+static struct event_filter *__alloc_preds(void)
 {
         struct event_filter *filter;
         struct filter_pred *pred;
         int i;
 
-        if (call->filter)
-                return 0;
-
-        filter = call->filter = kzalloc(sizeof(*filter), GFP_KERNEL);
-        if (!call->filter)
-                return -ENOMEM;
+        filter = kzalloc(sizeof(*filter), GFP_KERNEL);
+        if (!filter)
+                return ERR_PTR(-ENOMEM);
 
         filter->n_preds = 0;
 
@@ -471,12 +585,24 @@ static int init_preds(struct ftrace_event_call *call)
                 filter->preds[i] = pred;
         }
 
-        return 0;
+        return filter;
 
 oom:
-        destroy_preds(call);
+        __free_preds(filter);
+        return ERR_PTR(-ENOMEM);
+}
 
-        return -ENOMEM;
+static int init_preds(struct ftrace_event_call *call)
+{
+        if (call->filter)
+                return 0;
+
+        call->filter_active = 0;
+        call->filter = __alloc_preds();
+        if (IS_ERR(call->filter))
+                return PTR_ERR(call->filter);
+
+        return 0;
 }
 
 static int init_subsystem_preds(struct event_subsystem *system)
@@ -499,14 +625,7 @@ static int init_subsystem_preds(struct event_subsystem *system)
         return 0;
 }
 
-enum {
-        FILTER_DISABLE_ALL,
-        FILTER_INIT_NO_RESET,
-        FILTER_SKIP_NO_RESET,
-};
-
-static void filter_free_subsystem_preds(struct event_subsystem *system,
-                                        int flag)
+static void filter_free_subsystem_preds(struct event_subsystem *system)
 {
         struct ftrace_event_call *call;
 
@@ -517,14 +636,6 @@ static void filter_free_subsystem_preds(struct event_subsystem *system,
                 if (strcmp(call->system, system->name) != 0)
                         continue;
 
-                if (flag == FILTER_INIT_NO_RESET) {
-                        call->filter->no_reset = false;
-                        continue;
-                }
-
-                if (flag == FILTER_SKIP_NO_RESET && call->filter->no_reset)
-                        continue;
-
                 filter_disable_preds(call);
                 remove_filter_string(call->filter);
         }
@@ -532,10 +643,10 @@ static void filter_free_subsystem_preds(struct event_subsystem *system,
 
 static int filter_add_pred_fn(struct filter_parse_state *ps,
                               struct ftrace_event_call *call,
+                              struct event_filter *filter,
                               struct filter_pred *pred,
                               filter_pred_fn_t fn)
 {
-        struct event_filter *filter = call->filter;
         int idx, err;
 
         if (filter->n_preds == MAX_FILTER_PRED) {
@@ -550,7 +661,6 @@ static int filter_add_pred_fn(struct filter_parse_state *ps,
                 return err;
 
         filter->n_preds++;
-        call->filter_active = 1;
 
         return 0;
 }
@@ -575,7 +685,10 @@ static bool is_string_field(struct ftrace_event_field *field)
 
 static int is_legal_op(struct ftrace_event_field *field, int op)
 {
-        if (is_string_field(field) && (op != OP_EQ && op != OP_NE))
+        if (is_string_field(field) &&
+            (op != OP_EQ && op != OP_NE && op != OP_GLOB))
+                return 0;
+        if (!is_string_field(field) && op == OP_GLOB)
                 return 0;
 
         return 1;
@@ -626,6 +739,7 @@ static filter_pred_fn_t select_comparison_fn(int op, int field_size,
 
 static int filter_add_pred(struct filter_parse_state *ps,
                            struct ftrace_event_call *call,
+                           struct event_filter *filter,
                            struct filter_pred *pred,
                            bool dry_run)
 {
@@ -660,21 +774,22 @@ static int filter_add_pred(struct filter_parse_state *ps,
         }
 
         if (is_string_field(field)) {
-                pred->str_len = field->size;
+                filter_build_regex(pred);
 
-                if (field->filter_type == FILTER_STATIC_STRING)
+                if (field->filter_type == FILTER_STATIC_STRING) {
                         fn = filter_pred_string;
-                else if (field->filter_type == FILTER_DYN_STRING)
+                        pred->regex.field_len = field->size;
+                } else if (field->filter_type == FILTER_DYN_STRING)
                         fn = filter_pred_strloc;
                 else {
                         fn = filter_pred_pchar;
-                        pred->str_len = strlen(pred->str_val);
+                        pred->regex.field_len = strlen(pred->regex.pattern);
                 }
         } else {
                 if (field->is_signed)
-                        ret = strict_strtoll(pred->str_val, 0, &val);
+                        ret = strict_strtoll(pred->regex.pattern, 0, &val);
                 else
-                        ret = strict_strtoull(pred->str_val, 0, &val);
+                        ret = strict_strtoull(pred->regex.pattern, 0, &val);
                 if (ret) {
                         parse_error(ps, FILT_ERR_ILLEGAL_INTVAL, 0);
                         return -EINVAL;
@@ -694,45 +809,7 @@ static int filter_add_pred(struct filter_parse_state *ps,
 
 add_pred_fn:
         if (!dry_run)
-                return filter_add_pred_fn(ps, call, pred, fn);
-        return 0;
-}
-
-static int filter_add_subsystem_pred(struct filter_parse_state *ps,
-                                     struct event_subsystem *system,
-                                     struct filter_pred *pred,
-                                     char *filter_string,
-                                     bool dry_run)
-{
-        struct ftrace_event_call *call;
-        int err = 0;
-        bool fail = true;
-
-        list_for_each_entry(call, &ftrace_events, list) {
-
-                if (!call->define_fields)
-                        continue;
-
-                if (strcmp(call->system, system->name))
-                        continue;
-
-                if (call->filter->no_reset)
-                        continue;
-
-                err = filter_add_pred(ps, call, pred, dry_run);
-                if (err)
-                        call->filter->no_reset = true;
-                else
-                        fail = false;
-
-                if (!dry_run)
-                        replace_filter_string(call->filter, filter_string);
-        }
-
-        if (fail) {
-                parse_error(ps, FILT_ERR_BAD_SUBSYS_FILTER, 0);
-                return err;
-        }
+                return filter_add_pred_fn(ps, call, filter, pred, fn);
         return 0;
 }
 
@@ -1045,8 +1122,8 @@ static struct filter_pred *create_pred(int op, char *operand1, char *operand2)
                 return NULL;
         }
 
-        strcpy(pred->str_val, operand2);
-        pred->str_len = strlen(operand2);
+        strcpy(pred->regex.pattern, operand2);
+        pred->regex.len = strlen(pred->regex.pattern);
 
         pred->op = op;
 
@@ -1090,8 +1167,8 @@ static int check_preds(struct filter_parse_state *ps)
         return 0;
 }
 
-static int replace_preds(struct event_subsystem *system,
-                         struct ftrace_event_call *call,
+static int replace_preds(struct ftrace_event_call *call,
+                         struct event_filter *filter,
                          struct filter_parse_state *ps,
                          char *filter_string,
                          bool dry_run)
@@ -1138,11 +1215,7 @@ static int replace_preds(struct event_subsystem *system,
 add_pred:
                 if (!pred)
                         return -ENOMEM;
-                if (call)
-                        err = filter_add_pred(ps, call, pred, false);
-                else
-                        err = filter_add_subsystem_pred(ps, system, pred,
-                                                filter_string, dry_run);
+                err = filter_add_pred(ps, call, filter, pred, dry_run);
                 filter_free_pred(pred);
                 if (err)
                         return err;
@@ -1153,10 +1226,50 @@ add_pred:
         return 0;
 }
 
-int apply_event_filter(struct ftrace_event_call *call, char *filter_string)
+static int replace_system_preds(struct event_subsystem *system,
+                                struct filter_parse_state *ps,
+                                char *filter_string)
 {
+        struct ftrace_event_call *call;
+        bool fail = true;
         int err;
 
+        list_for_each_entry(call, &ftrace_events, list) {
+                struct event_filter *filter = call->filter;
+
+                if (!call->define_fields)
+                        continue;
+
+                if (strcmp(call->system, system->name) != 0)
+                        continue;
+
+                /* try to see if the filter can be applied */
+                err = replace_preds(call, filter, ps, filter_string, true);
+                if (err)
+                        continue;
+
+                /* really apply the filter */
+                filter_disable_preds(call);
+                err = replace_preds(call, filter, ps, filter_string, false);
+                if (err)
+                        filter_disable_preds(call);
+                else {
+                        call->filter_active = 1;
+                        replace_filter_string(filter, filter_string);
+                }
+                fail = false;
+        }
+
+        if (fail) {
+                parse_error(ps, FILT_ERR_BAD_SUBSYS_FILTER, 0);
+                return -EINVAL;
+        }
+        return 0;
+}
+
+int apply_event_filter(struct ftrace_event_call *call, char *filter_string)
+{
+        int err;
         struct filter_parse_state *ps;
 
         mutex_lock(&event_mutex);
@@ -1168,8 +1281,7 @@ int apply_event_filter(struct ftrace_event_call *call, char *filter_string)
         if (!strcmp(strstrip(filter_string), "0")) {
                 filter_disable_preds(call);
                 remove_filter_string(call->filter);
-                mutex_unlock(&event_mutex);
-                return 0;
+                goto out_unlock;
         }
 
         err = -ENOMEM;
@@ -1187,10 +1299,11 @@ int apply_event_filter(struct ftrace_event_call *call, char *filter_string)
                 goto out;
         }
 
-        err = replace_preds(NULL, call, ps, filter_string, false);
+        err = replace_preds(call, call->filter, ps, filter_string, false);
         if (err)
                 append_filter_err(ps, call->filter);
-
+        else
+                call->filter_active = 1;
 out:
         filter_opstack_clear(ps);
         postfix_clear(ps);
@@ -1205,7 +1318,6 @@ int apply_subsystem_event_filter(struct event_subsystem *system,
                                  char *filter_string)
 {
         int err;
-
         struct filter_parse_state *ps;
 
         mutex_lock(&event_mutex);
@@ -1215,10 +1327,9 @@ int apply_subsystem_event_filter(struct event_subsystem *system,
                 goto out_unlock;
 
         if (!strcmp(strstrip(filter_string), "0")) {
-                filter_free_subsystem_preds(system, FILTER_DISABLE_ALL);
+                filter_free_subsystem_preds(system);
                 remove_filter_string(system->filter);
-                mutex_unlock(&event_mutex);
-                return 0;
+                goto out_unlock;
         }
 
         err = -ENOMEM;
@@ -1235,31 +1346,87 @@ int apply_subsystem_event_filter(struct event_subsystem *system,
                 goto out;
         }
 
-        filter_free_subsystem_preds(system, FILTER_INIT_NO_RESET);
-
-        /* try to see the filter can be applied to which events */
-        err = replace_preds(system, NULL, ps, filter_string, true);
-        if (err) {
+        err = replace_system_preds(system, ps, filter_string);
+        if (err)
                 append_filter_err(ps, system->filter);
-                goto out;
+
+out:
+        filter_opstack_clear(ps);
+        postfix_clear(ps);
+        kfree(ps);
+out_unlock:
+        mutex_unlock(&event_mutex);
+
+        return err;
+}
+
+#ifdef CONFIG_EVENT_PROFILE
+
+void ftrace_profile_free_filter(struct perf_event *event)
+{
+        struct event_filter *filter = event->filter;
+
+        event->filter = NULL;
+        __free_preds(filter);
+}
+
+int ftrace_profile_set_filter(struct perf_event *event, int event_id,
+                              char *filter_str)
+{
+        int err;
+        struct event_filter *filter;
+        struct filter_parse_state *ps;
+        struct ftrace_event_call *call = NULL;
+
+        mutex_lock(&event_mutex);
+
+        list_for_each_entry(call, &ftrace_events, list) {
+                if (call->id == event_id)
+                        break;
         }
 
-        filter_free_subsystem_preds(system, FILTER_SKIP_NO_RESET);
+        err = -EINVAL;
+        if (!call)
+                goto out_unlock;
 
-        /* really apply the filter to the events */
-        err = replace_preds(system, NULL, ps, filter_string, false);
-        if (err) {
-                append_filter_err(ps, system->filter);
-                filter_free_subsystem_preds(system, 2);
+        err = -EEXIST;
+        if (event->filter)
+                goto out_unlock;
+
+        filter = __alloc_preds();
+        if (IS_ERR(filter)) {
+                err = PTR_ERR(filter);
+                goto out_unlock;
         }
 
-out:
+        err = -ENOMEM;
+        ps = kzalloc(sizeof(*ps), GFP_KERNEL);
+        if (!ps)
+                goto free_preds;
+
+        parse_init(ps, filter_ops, filter_str);
+        err = filter_parse(ps);
+        if (err)
+                goto free_ps;
+
+        err = replace_preds(call, filter, ps, filter_str, false);
+        if (!err)
+                event->filter = filter;
+
+free_ps:
         filter_opstack_clear(ps);
         postfix_clear(ps);
         kfree(ps);
+
+free_preds:
+        if (err)
+                __free_preds(filter);
+
 out_unlock:
         mutex_unlock(&event_mutex);
 
         return err;
 }
 
+#endif /* CONFIG_EVENT_PROFILE */
+
diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
index 9753fcc61bc5..458e5bfe26d0 100644
--- a/kernel/trace/trace_export.c
+++ b/kernel/trace/trace_export.c
@@ -48,11 +48,11 @@
 struct ____ftrace_##name {                                      \
         tstruct                                                 \
 };                                                              \
-static void __used ____ftrace_check_##name(void)                \
+static void __always_unused ____ftrace_check_##name(void)       \
 {                                                               \
         struct ____ftrace_##name *__entry = NULL;               \
                                                                 \
-        /* force cmpile-time check on F_printk() */             \
+        /* force compile-time check on F_printk() */            \
         printk(print);                                          \
 }
 
@@ -66,44 +66,47 @@ static void __used ____ftrace_check_##name(void)		\
 #undef __field
 #define __field(type, item)                                             \
         ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t"      \
-                               "offset:%zu;\tsize:%zu;\n",              \
+                               "offset:%zu;\tsize:%zu;\tsigned:%u;\n",  \
                                offsetof(typeof(field), item),           \
-                               sizeof(field.item));                     \
+                               sizeof(field.item), is_signed_type(type)); \
         if (!ret)                                                       \
                 return 0;
 
 #undef __field_desc
 #define __field_desc(type, container, item)                             \
         ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t"      \
-                               "offset:%zu;\tsize:%zu;\n",              \
+                               "offset:%zu;\tsize:%zu;\tsigned:%u;\n",  \
                                offsetof(typeof(field), container.item), \
-                               sizeof(field.container.item));           \
+                               sizeof(field.container.item),            \
+                               is_signed_type(type));                   \
         if (!ret)                                                       \
                 return 0;
 
 #undef __array
 #define __array(type, item, len)                                        \
         ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
-                               "offset:%zu;\tsize:%zu;\n",              \
-                               offsetof(typeof(field), item),   \
-                               sizeof(field.item));             \
+                               "offset:%zu;\tsize:%zu;\tsigned:%u;\n",  \
+                               offsetof(typeof(field), item),           \
+                               sizeof(field.item), is_signed_type(type)); \
         if (!ret)                                                       \
                 return 0;
 
 #undef __array_desc
 #define __array_desc(type, container, item, len)                        \
         ret = trace_seq_printf(s, "\tfield:" #type " " #item "[" #len "];\t" \
-                               "offset:%zu;\tsize:%zu;\n",              \
+                               "offset:%zu;\tsize:%zu;\tsigned:%u;\n",  \
                                offsetof(typeof(field), container.item), \
-                               sizeof(field.container.item));           \
+                               sizeof(field.container.item),            \
+                               is_signed_type(type));                   \
         if (!ret)                                                       \
                 return 0;
 
 #undef __dynamic_array
 #define __dynamic_array(type, item)                                     \
         ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t"      \
-                               "offset:%zu;\tsize:0;\n",                \
-                               offsetof(typeof(field), item));          \
+                               "offset:%zu;\tsize:0;\tsigned:%u;\n",    \
+                               offsetof(typeof(field), item),           \
+                               is_signed_type(type));                   \
         if (!ret)                                                       \
                 return 0;
 
@@ -131,7 +134,6 @@ ftrace_format_##name(struct ftrace_event_call *unused,			\
 
 #include "trace_entries.h"
 
-
 #undef __field
 #define __field(type, item)                                             \
         ret = trace_define_field(event_call, #type, #item,              \
@@ -182,10 +184,6 @@ ftrace_define_fields_##name(struct ftrace_event_call *event_call)	\
         struct struct_name field;                                       \
         int ret;                                                        \
                                                                         \
-        ret = trace_define_common_fields(event_call);                   \
-        if (ret)                                                        \
-                return ret;                                             \
-                                                                        \
         tstruct;                                                        \
                                                                         \
         return ret;                                                     \
@@ -193,6 +191,11 @@ ftrace_define_fields_##name(struct ftrace_event_call *event_call)	\
 
 #include "trace_entries.h"
 
+static int ftrace_raw_init_event(struct ftrace_event_call *call)
+{
+        INIT_LIST_HEAD(&call->fields);
+        return 0;
+}
 
 #undef __field
 #define __field(type, item)
@@ -211,7 +214,6 @@ ftrace_define_fields_##name(struct ftrace_event_call *event_call)	\
 
 #undef FTRACE_ENTRY
 #define FTRACE_ENTRY(call, struct_name, type, tstruct, print)           \
-static int ftrace_raw_init_event_##call(void);                          \
                                                                         \
 struct ftrace_event_call __used                                         \
 __attribute__((__aligned__(4)))                                         \
@@ -219,14 +221,9 @@ __attribute__((section("_ftrace_events"))) event_##call = {		\
         .name                   = #call,                                \
         .id                     = type,                                 \
         .system                 = __stringify(TRACE_SYSTEM),            \
-        .raw_init               = ftrace_raw_init_event_##call,         \
+        .raw_init               = ftrace_raw_init_event,                \
         .show_format            = ftrace_format_##call,                 \
         .define_fields          = ftrace_define_fields_##call,          \
 };                                                                      \
-static int ftrace_raw_init_event_##call(void)                           \
-{                                                                       \
-        INIT_LIST_HEAD(&event_##call.fields);                           \
-        return 0;                                                       \
-}                                                                       \
 
 #include "trace_entries.h"
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 45e6c01b2e4d..b1342c5d37cf 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -14,9 +14,20 @@
 #include "trace.h"
 #include "trace_output.h"
 
-struct fgraph_data {
+struct fgraph_cpu_data {
         pid_t           last_pid;
         int             depth;
+        int             ignore;
+};
+
+struct fgraph_data {
+        struct fgraph_cpu_data          *cpu_data;
+
+        /* Place to preserve last processed entry. */
+        struct ftrace_graph_ent_entry   ent;
+        struct ftrace_graph_ret_entry   ret;
+        int                             failed;
+        int                             cpu;
 };
 
 #define TRACE_GRAPH_INDENT      2
@@ -176,7 +187,7 @@ static int __trace_graph_entry(struct trace_array *tr,
         struct ring_buffer *buffer = tr->buffer;
         struct ftrace_graph_ent_entry *entry;
 
-        if (unlikely(local_read(&__get_cpu_var(ftrace_cpu_disabled))))
+        if (unlikely(__this_cpu_read(per_cpu_var(ftrace_cpu_disabled))))
                 return 0;
 
         event = trace_buffer_lock_reserve(buffer, TRACE_GRAPH_ENT,
@@ -240,7 +251,7 @@ static void __trace_graph_return(struct trace_array *tr,
         struct ring_buffer *buffer = tr->buffer;
         struct ftrace_graph_ret_entry *entry;
 
-        if (unlikely(local_read(&__get_cpu_var(ftrace_cpu_disabled))))
+        if (unlikely(__this_cpu_read(per_cpu_var(ftrace_cpu_disabled))))
                 return;
 
         event = trace_buffer_lock_reserve(buffer, TRACE_GRAPH_RET,
@@ -384,7 +395,7 @@ verif_pid(struct trace_seq *s, pid_t pid, int cpu, struct fgraph_data *data)
         if (!data)
                 return TRACE_TYPE_HANDLED;
 
-        last_pid = &(per_cpu_ptr(data, cpu)->last_pid);
+        last_pid = &(per_cpu_ptr(data->cpu_data, cpu)->last_pid);
 
         if (*last_pid == pid)
                 return TRACE_TYPE_HANDLED;
@@ -435,26 +446,49 @@ static struct ftrace_graph_ret_entry *
 get_return_for_leaf(struct trace_iterator *iter,
                 struct ftrace_graph_ent_entry *curr)
 {
-        struct ring_buffer_iter *ring_iter;
+        struct fgraph_data *data = iter->private;
+        struct ring_buffer_iter *ring_iter = NULL;
         struct ring_buffer_event *event;
         struct ftrace_graph_ret_entry *next;
 
-        ring_iter = iter->buffer_iter[iter->cpu];
+        /*
+         * If the previous output failed to write to the seq buffer,
+         * then we just reuse the data from before.
+         */
+        if (data && data->failed) {
+                curr = &data->ent;
+                next = &data->ret;
+        } else {
 
-        /* First peek to compare current entry and the next one */
-        if (ring_iter)
-                event = ring_buffer_iter_peek(ring_iter, NULL);
-        else {
-        /* We need to consume the current entry to see the next one */
-                ring_buffer_consume(iter->tr->buffer, iter->cpu, NULL);
-                event = ring_buffer_peek(iter->tr->buffer, iter->cpu,
-                                        NULL);
-        }
+                ring_iter = iter->buffer_iter[iter->cpu];
+
+                /* First peek to compare current entry and the next one */
+                if (ring_iter)
+                        event = ring_buffer_iter_peek(ring_iter, NULL);
+                else {
+                        /*
+                         * We need to consume the current entry to see
+                         * the next one.
+                         */
+                        ring_buffer_consume(iter->tr->buffer, iter->cpu, NULL);
+                        event = ring_buffer_peek(iter->tr->buffer, iter->cpu,
+                                                 NULL);
+                }
 
-        if (!event)
-                return NULL;
+                if (!event)
+                        return NULL;
+
+                next = ring_buffer_event_data(event);
 
-        next = ring_buffer_event_data(event);
+                if (data) {
+                        /*
+                         * Save current and next entries for later reference
+                         * if the output fails.
+                         */
+                        data->ent = *curr;
+                        data->ret = *next;
+                }
+        }
 
         if (next->ent.type != TRACE_GRAPH_RET)
                 return NULL;
@@ -640,7 +674,7 @@ print_graph_entry_leaf(struct trace_iterator *iter,
 
         if (data) {
                 int cpu = iter->cpu;
-                int *depth = &(per_cpu_ptr(data, cpu)->depth);
+                int *depth = &(per_cpu_ptr(data->cpu_data, cpu)->depth);
 
                 /*
                  * Comments display at + 1 to depth. Since
@@ -688,7 +722,7 @@ print_graph_entry_nested(struct trace_iterator *iter,
 
         if (data) {
                 int cpu = iter->cpu;
-                int *depth = &(per_cpu_ptr(data, cpu)->depth);
+                int *depth = &(per_cpu_ptr(data->cpu_data, cpu)->depth);
 
                 *depth = call->depth;
         }
@@ -782,19 +816,34 @@ static enum print_line_t
 print_graph_entry(struct ftrace_graph_ent_entry *field, struct trace_seq *s,
                         struct trace_iterator *iter)
 {
-        int cpu = iter->cpu;
+        struct fgraph_data *data = iter->private;
         struct ftrace_graph_ent *call = &field->graph_ent;
         struct ftrace_graph_ret_entry *leaf_ret;
+        static enum print_line_t ret;
+        int cpu = iter->cpu;
 
         if (print_graph_prologue(iter, s, TRACE_GRAPH_ENT, call->func))
                 return TRACE_TYPE_PARTIAL_LINE;
 
         leaf_ret = get_return_for_leaf(iter, field);
         if (leaf_ret)
-                return print_graph_entry_leaf(iter, field, leaf_ret, s);
+                ret = print_graph_entry_leaf(iter, field, leaf_ret, s);
         else
-                return print_graph_entry_nested(iter, field, s, cpu);
+                ret = print_graph_entry_nested(iter, field, s, cpu);
 
+        if (data) {
+                /*
+                 * If we failed to write our output, then we need to make
+                 * note of it. Because we already consumed our entry.
+                 */
+                if (s->full) {
+                        data->failed = 1;
+                        data->cpu = cpu;
+                } else
+                        data->failed = 0;
+        }
+
+        return ret;
 }
 
 static enum print_line_t
@@ -810,7 +859,7 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
 
         if (data) {
                 int cpu = iter->cpu;
-                int *depth = &(per_cpu_ptr(data, cpu)->depth);
+                int *depth = &(per_cpu_ptr(data->cpu_data, cpu)->depth);
 
                 /*
                  * Comments display at + 1 to depth. This is the
@@ -873,7 +922,7 @@ print_graph_comment(struct trace_seq *s,  struct trace_entry *ent,
         int i;
 
         if (data)
-                depth = per_cpu_ptr(data, iter->cpu)->depth;
+                depth = per_cpu_ptr(data->cpu_data, iter->cpu)->depth;
 
         if (print_graph_prologue(iter, s, 0, 0))
                 return TRACE_TYPE_PARTIAL_LINE;
@@ -941,8 +990,33 @@ print_graph_comment(struct trace_seq *s,  struct trace_entry *ent,
 enum print_line_t
 print_graph_function(struct trace_iterator *iter)
 {
+        struct ftrace_graph_ent_entry *field;
+        struct fgraph_data *data = iter->private;
         struct trace_entry *entry = iter->ent;
         struct trace_seq *s = &iter->seq;
+        int cpu = iter->cpu;
+        int ret;
+
+        if (data && per_cpu_ptr(data->cpu_data, cpu)->ignore) {
+                per_cpu_ptr(data->cpu_data, cpu)->ignore = 0;
+                return TRACE_TYPE_HANDLED;
+        }
+
+        /*
+         * If the last output failed, there's a possibility we need
+         * to print out the missing entry which would never go out.
+         */
+        if (data && data->failed) {
+                field = &data->ent;
+                iter->cpu = data->cpu;
+                ret = print_graph_entry(field, s, iter);
+                if (ret == TRACE_TYPE_HANDLED && iter->cpu != cpu) {
+                        per_cpu_ptr(data->cpu_data, iter->cpu)->ignore = 1;
+                        ret = TRACE_TYPE_NO_CONSUME;
+                }
+                iter->cpu = cpu;
+                return ret;
+        }
 
         switch (entry->type) {
         case TRACE_GRAPH_ENT: {
@@ -952,7 +1026,7 @@ print_graph_function(struct trace_iterator *iter)
                  * sizeof(struct ftrace_graph_ent_entry) is very small,
                  * it can be safely saved at the stack.
                  */
-                struct ftrace_graph_ent_entry *field, saved;
+                struct ftrace_graph_ent_entry saved;
                 trace_assign_type(field, entry);
                 saved = *field;
                 return print_graph_entry(&saved, s, iter);
@@ -1030,31 +1104,54 @@ static void print_graph_headers(struct seq_file *s)
 static void graph_trace_open(struct trace_iterator *iter)
 {
         /* pid and depth on the last trace processed */
-        struct fgraph_data *data = alloc_percpu(struct fgraph_data);
+        struct fgraph_data *data;
         int cpu;
 
+        iter->private = NULL;
+
+        data = kzalloc(sizeof(*data), GFP_KERNEL);
         if (!data)
-                pr_warning("function graph tracer: not enough memory\n");
-        else
-                for_each_possible_cpu(cpu) {
-                        pid_t *pid = &(per_cpu_ptr(data, cpu)->last_pid);
-                        int *depth = &(per_cpu_ptr(data, cpu)->depth);
-                        *pid = -1;
-                        *depth = 0;
-                }
+                goto out_err;
+
+        data->cpu_data = alloc_percpu(struct fgraph_cpu_data);
+        if (!data->cpu_data)
+                goto out_err_free;
+
+        for_each_possible_cpu(cpu) {
+                pid_t *pid = &(per_cpu_ptr(data->cpu_data, cpu)->last_pid);
+                int *depth = &(per_cpu_ptr(data->cpu_data, cpu)->depth);
+                int *ignore = &(per_cpu_ptr(data->cpu_data, cpu)->ignore);
+                *pid = -1;
+                *depth = 0;
+                *ignore = 0;
+        }
 
         iter->private = data;
+
+        return;
+
+ out_err_free:
+        kfree(data);
+ out_err:
+        pr_warning("function graph tracer: not enough memory\n");
 }
 
 static void graph_trace_close(struct trace_iterator *iter)
 {
-        free_percpu(iter->private);
+        struct fgraph_data *data = iter->private;
+
+        if (data) {
+                free_percpu(data->cpu_data);
+                kfree(data);
+        }
 }
 
 static struct tracer graph_trace __read_mostly = {
         .name           = "function_graph",
         .open           = graph_trace_open,
+        .pipe_open      = graph_trace_open,
         .close          = graph_trace_close,
+        .pipe_close     = graph_trace_close,
         .wait_pipe      = poll_wait_pipe,
         .init           = graph_trace_init,
         .reset          = graph_trace_reset,
diff --git a/kernel/trace/trace_hw_branches.c b/kernel/trace/trace_hw_branches.c
index 69543a905cd5..7b97000745f5 100644
--- a/kernel/trace/trace_hw_branches.c
+++ b/kernel/trace/trace_hw_branches.c
@@ -20,10 +20,10 @@
 
 #define BTS_BUFFER_SIZE (1 << 13)
 
-static DEFINE_PER_CPU(struct bts_tracer *, tracer);
-static DEFINE_PER_CPU(unsigned char[BTS_BUFFER_SIZE], buffer);
+static DEFINE_PER_CPU(struct bts_tracer *, hwb_tracer);
+static DEFINE_PER_CPU(unsigned char[BTS_BUFFER_SIZE], hwb_buffer);
 
-#define this_tracer per_cpu(tracer, smp_processor_id())
+#define this_tracer per_cpu(hwb_tracer, smp_processor_id())
 
 static int trace_hw_branches_enabled __read_mostly;
 static int trace_hw_branches_suspended __read_mostly;
@@ -32,12 +32,13 @@ static struct trace_array *hw_branch_trace __read_mostly;
 
 static void bts_trace_init_cpu(int cpu)
 {
-        per_cpu(tracer, cpu) =
-                ds_request_bts_cpu(cpu, per_cpu(buffer, cpu), BTS_BUFFER_SIZE,
-                                   NULL, (size_t)-1, BTS_KERNEL);
+        per_cpu(hwb_tracer, cpu) =
+                ds_request_bts_cpu(cpu, per_cpu(hwb_buffer, cpu),
+                                   BTS_BUFFER_SIZE, NULL, (size_t)-1,
+                                   BTS_KERNEL);
 
-        if (IS_ERR(per_cpu(tracer, cpu)))
-                per_cpu(tracer, cpu) = NULL;
+        if (IS_ERR(per_cpu(hwb_tracer, cpu)))
+                per_cpu(hwb_tracer, cpu) = NULL;
 }
 
 static int bts_trace_init(struct trace_array *tr)
@@ -51,7 +52,7 @@ static int bts_trace_init(struct trace_array *tr)
         for_each_online_cpu(cpu) {
                 bts_trace_init_cpu(cpu);
 
-                if (likely(per_cpu(tracer, cpu)))
+                if (likely(per_cpu(hwb_tracer, cpu)))
                         trace_hw_branches_enabled = 1;
         }
         trace_hw_branches_suspended = 0;
@@ -67,9 +68,9 @@ static void bts_trace_reset(struct trace_array *tr)
 
         get_online_cpus();
         for_each_online_cpu(cpu) {
-                if (likely(per_cpu(tracer, cpu))) {
-                        ds_release_bts(per_cpu(tracer, cpu));
-                        per_cpu(tracer, cpu) = NULL;
+                if (likely(per_cpu(hwb_tracer, cpu))) {
+                        ds_release_bts(per_cpu(hwb_tracer, cpu));
+                        per_cpu(hwb_tracer, cpu) = NULL;
                 }
         }
         trace_hw_branches_enabled = 0;
@@ -83,8 +84,8 @@ static void bts_trace_start(struct trace_array *tr)
 
         get_online_cpus();
         for_each_online_cpu(cpu)
-                if (likely(per_cpu(tracer, cpu)))
-                        ds_resume_bts(per_cpu(tracer, cpu));
+                if (likely(per_cpu(hwb_tracer, cpu)))
+                        ds_resume_bts(per_cpu(hwb_tracer, cpu));
         trace_hw_branches_suspended = 0;
         put_online_cpus();
 }
@@ -95,8 +96,8 @@ static void bts_trace_stop(struct trace_array *tr)
 
         get_online_cpus();
         for_each_online_cpu(cpu)
-                if (likely(per_cpu(tracer, cpu)))
-                        ds_suspend_bts(per_cpu(tracer, cpu));
+                if (likely(per_cpu(hwb_tracer, cpu)))
+                        ds_suspend_bts(per_cpu(hwb_tracer, cpu));
         trace_hw_branches_suspended = 1;
         put_online_cpus();
 }
@@ -114,16 +115,16 @@ static int __cpuinit bts_hotcpu_handler(struct notifier_block *nfb,
                         bts_trace_init_cpu(cpu);
 
                         if (trace_hw_branches_suspended &&
-                            likely(per_cpu(tracer, cpu)))
-                                ds_suspend_bts(per_cpu(tracer, cpu));
+                            likely(per_cpu(hwb_tracer, cpu)))
+                                ds_suspend_bts(per_cpu(hwb_tracer, cpu));
                 }
                 break;
 
         case CPU_DOWN_PREPARE:
                 /* The notification is sent with interrupts enabled. */
-                if (likely(per_cpu(tracer, cpu))) {
-                        ds_release_bts(per_cpu(tracer, cpu));
-                        per_cpu(tracer, cpu) = NULL;
+                if (likely(per_cpu(hwb_tracer, cpu))) {
+                        ds_release_bts(per_cpu(hwb_tracer, cpu));
+                        per_cpu(hwb_tracer, cpu) = NULL;
                 }
         }
 
@@ -258,8 +259,8 @@ static void trace_bts_prepare(struct trace_iterator *iter)
 
         get_online_cpus();
         for_each_online_cpu(cpu)
-                if (likely(per_cpu(tracer, cpu)))
-                        ds_suspend_bts(per_cpu(tracer, cpu));
+                if (likely(per_cpu(hwb_tracer, cpu)))
+                        ds_suspend_bts(per_cpu(hwb_tracer, cpu));
         /*
          * We need to collect the trace on the respective cpu since ftrace
          * implicitly adds the record for the current cpu.
@@ -268,8 +269,8 @@ static void trace_bts_prepare(struct trace_iterator *iter)
         on_each_cpu(trace_bts_cpu, iter->tr, 1);
 
         for_each_online_cpu(cpu)
-                if (likely(per_cpu(tracer, cpu)))
-                        ds_resume_bts(per_cpu(tracer, cpu));
+                if (likely(per_cpu(hwb_tracer, cpu)))
+                        ds_resume_bts(per_cpu(hwb_tracer, cpu));
         put_online_cpus();
 }
 
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index 3aa7eaa2114c..2974bc7538c7 100644
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -151,6 +151,8 @@ check_critical_timing(struct trace_array *tr,
                 goto out_unlock;
 
         trace_function(tr, CALLER_ADDR0, parent_ip, flags, pc);
+        /* Skip 5 functions to get to the irq/preempt enable function */
+        __trace_stack(tr, flags, 5, pc);
 
         if (data->critical_sequence != max_sequence)
                 goto out_unlock;
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
new file mode 100644
index 000000000000..7ecab06547a5
--- /dev/null
+++ b/kernel/trace/trace_kprobe.c
@@ -0,0 +1,1533 @@
+/*
+ * Kprobes-based tracing events
+ *
+ * Created by Masami Hiramatsu <mhiramat@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/module.h>
+#include <linux/uaccess.h>
+#include <linux/kprobes.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+#include <linux/debugfs.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/ptrace.h>
+#include <linux/perf_event.h>
+
+#include "trace.h"
+#include "trace_output.h"
+
+#define MAX_TRACE_ARGS 128
+#define MAX_ARGSTR_LEN 63
+#define MAX_EVENT_NAME_LEN 64
+#define KPROBE_EVENT_SYSTEM "kprobes"
+
+/* Reserved field names */
+#define FIELD_STRING_IP "__probe_ip"
+#define FIELD_STRING_NARGS "__probe_nargs"
+#define FIELD_STRING_RETIP "__probe_ret_ip"
+#define FIELD_STRING_FUNC "__probe_func"
+
+const char *reserved_field_names[] = {
+        "common_type",
+        "common_flags",
+        "common_preempt_count",
+        "common_pid",
+        "common_tgid",
+        "common_lock_depth",
+        FIELD_STRING_IP,
+        FIELD_STRING_NARGS,
+        FIELD_STRING_RETIP,
+        FIELD_STRING_FUNC,
+};
+
+struct fetch_func {
+        unsigned long (*func)(struct pt_regs *, void *);
+        void *data;
+};
+
+static __kprobes unsigned long call_fetch(struct fetch_func *f,
+                                          struct pt_regs *regs)
+{
+        return f->func(regs, f->data);
+}
+
+/* fetch handlers */
+static __kprobes unsigned long fetch_register(struct pt_regs *regs,
+                                              void *offset)
+{
+        return regs_get_register(regs, (unsigned int)((unsigned long)offset));
+}
+
+static __kprobes unsigned long fetch_stack(struct pt_regs *regs,
+                                           void *num)
+{
+        return regs_get_kernel_stack_nth(regs,
+                                         (unsigned int)((unsigned long)num));
+}
+
+static __kprobes unsigned long fetch_memory(struct pt_regs *regs, void *addr)
+{
+        unsigned long retval;
+
+        if (probe_kernel_address(addr, retval))
+                return 0;
+        return retval;
+}
+
+static __kprobes unsigned long fetch_argument(struct pt_regs *regs, void *num)
+{
+        return regs_get_argument_nth(regs, (unsigned int)((unsigned long)num));
+}
+
+static __kprobes unsigned long fetch_retvalue(struct pt_regs *regs,
+                                              void *dummy)
+{
+        return regs_return_value(regs);
+}
+
+static __kprobes unsigned long fetch_stack_address(struct pt_regs *regs,
+                                                   void *dummy)
+{
+        return kernel_stack_pointer(regs);
+}
+
+/* Memory fetching by symbol */
+struct symbol_cache {
+        char *symbol;
+        long offset;
+        unsigned long addr;
+};
+
+static unsigned long update_symbol_cache(struct symbol_cache *sc)
+{
+        sc->addr = (unsigned long)kallsyms_lookup_name(sc->symbol);
+        if (sc->addr)
+                sc->addr += sc->offset;
+        return sc->addr;
+}
+
+static void free_symbol_cache(struct symbol_cache *sc)
+{
+        kfree(sc->symbol);
+        kfree(sc);
+}
+
+static struct symbol_cache *alloc_symbol_cache(const char *sym, long offset)
+{
+        struct symbol_cache *sc;
+
+        if (!sym || strlen(sym) == 0)
+                return NULL;
+        sc = kzalloc(sizeof(struct symbol_cache), GFP_KERNEL);
+        if (!sc)
+                return NULL;
+
+        sc->symbol = kstrdup(sym, GFP_KERNEL);
+        if (!sc->symbol) {
+                kfree(sc);
+                return NULL;
+        }
+        sc->offset = offset;
+
+        update_symbol_cache(sc);
+        return sc;
+}
+
+static __kprobes unsigned long fetch_symbol(struct pt_regs *regs, void *data)
+{
+        struct symbol_cache *sc = data;
+
+        if (sc->addr)
+                return fetch_memory(regs, (void *)sc->addr);
+        else
+                return 0;
+}
+
+/* Special indirect memory access interface */
+struct indirect_fetch_data {
+        struct fetch_func orig;
+        long offset;
+};
+
+static __kprobes unsigned long fetch_indirect(struct pt_regs *regs, void *data)
+{
+        struct indirect_fetch_data *ind = data;
+        unsigned long addr;
+
+        addr = call_fetch(&ind->orig, regs);
+        if (addr) {
+                addr += ind->offset;
+                return fetch_memory(regs, (void *)addr);
+        } else
+                return 0;
+}
+
+static __kprobes void free_indirect_fetch_data(struct indirect_fetch_data *data)
+{
+        if (data->orig.func == fetch_indirect)
+                free_indirect_fetch_data(data->orig.data);
+        else if (data->orig.func == fetch_symbol)
+                free_symbol_cache(data->orig.data);
+        kfree(data);
+}
+
+/**
+ * Kprobe event core functions
+ */
+
+struct probe_arg {
+        struct fetch_func       fetch;
+        const char              *name;
+};
+
+/* Flags for trace_probe */
+#define TP_FLAG_TRACE   1
+#define TP_FLAG_PROFILE 2
+
+struct trace_probe {
+        struct list_head        list;
+        struct kretprobe        rp;     /* Use rp.kp for kprobe use */
+        unsigned long           nhit;
+        unsigned int            flags;  /* For TP_FLAG_* */
+        const char              *symbol;        /* symbol name */
+        struct ftrace_event_call        call;
+        struct trace_event              event;
+        unsigned int            nr_args;
+        struct probe_arg        args[];
+};
+
+#define SIZEOF_TRACE_PROBE(n)                   \
+        (offsetof(struct trace_probe, args) +   \
+        (sizeof(struct probe_arg) * (n)))
+
+static __kprobes int probe_is_return(struct trace_probe *tp)
+{
+        return tp->rp.handler != NULL;
+}
+
+static __kprobes const char *probe_symbol(struct trace_probe *tp)
+{
+        return tp->symbol ? tp->symbol : "unknown";
+}
+
+static int probe_arg_string(char *buf, size_t n, struct fetch_func *ff)
+{
+        int ret = -EINVAL;
+
+        if (ff->func == fetch_argument)
+                ret = snprintf(buf, n, "$arg%lu", (unsigned long)ff->data);
+        else if (ff->func == fetch_register) {
+                const char *name;
+                name = regs_query_register_name((unsigned int)((long)ff->data));
+                ret = snprintf(buf, n, "%%%s", name);
+        } else if (ff->func == fetch_stack)
+                ret = snprintf(buf, n, "$stack%lu", (unsigned long)ff->data);
+        else if (ff->func == fetch_memory)
+                ret = snprintf(buf, n, "@0x%p", ff->data);
+        else if (ff->func == fetch_symbol) {
+                struct symbol_cache *sc = ff->data;
+                if (sc->offset)
+                        ret = snprintf(buf, n, "@%s%+ld", sc->symbol,
+                                        sc->offset);
+                else
+                        ret = snprintf(buf, n, "@%s", sc->symbol);
+        } else if (ff->func == fetch_retvalue)
+                ret = snprintf(buf, n, "$retval");
+        else if (ff->func == fetch_stack_address)
+                ret = snprintf(buf, n, "$stack");
+        else if (ff->func == fetch_indirect) {
+                struct indirect_fetch_data *id = ff->data;
+                size_t l = 0;
+                ret = snprintf(buf, n, "%+ld(", id->offset);
+                if (ret >= n)
+                        goto end;
+                l += ret;
+                ret = probe_arg_string(buf + l, n - l, &id->orig);
+                if (ret < 0)
+                        goto end;
+                l += ret;
+                ret = snprintf(buf + l, n - l, ")");
+                ret += l;
+        }
+end:
+        if (ret >= n)
+                return -ENOSPC;
+        return ret;
+}
+
+static int register_probe_event(struct trace_probe *tp);
+static void unregister_probe_event(struct trace_probe *tp);
+
+static DEFINE_MUTEX(probe_lock);
+static LIST_HEAD(probe_list);
+
+static int kprobe_dispatcher(struct kprobe *kp, struct pt_regs *regs);
+static int kretprobe_dispatcher(struct kretprobe_instance *ri,
+                                struct pt_regs *regs);
+
+/*
+ * Allocate new trace_probe and initialize it (including kprobes).
+ */
+static struct trace_probe *alloc_trace_probe(const char *group,
+                                             const char *event,
+                                             void *addr,
+                                             const char *symbol,
+                                             unsigned long offs,
+                                             int nargs, int is_return)
+{
+        struct trace_probe *tp;
+
+        tp = kzalloc(SIZEOF_TRACE_PROBE(nargs), GFP_KERNEL);
+        if (!tp)
+                return ERR_PTR(-ENOMEM);
+
+        if (symbol) {
+                tp->symbol = kstrdup(symbol, GFP_KERNEL);
+                if (!tp->symbol)
+                        goto error;
+                tp->rp.kp.symbol_name = tp->symbol;
+                tp->rp.kp.offset = offs;
+        } else
+                tp->rp.kp.addr = addr;
+
+        if (is_return)
+                tp->rp.handler = kretprobe_dispatcher;
+        else
+                tp->rp.kp.pre_handler = kprobe_dispatcher;
+
+        if (!event)
+                goto error;
+        tp->call.name = kstrdup(event, GFP_KERNEL);
+        if (!tp->call.name)
+                goto error;
+
+        if (!group)
+                goto error;
+        tp->call.system = kstrdup(group, GFP_KERNEL);
+        if (!tp->call.system)
+                goto error;
+
+        INIT_LIST_HEAD(&tp->list);
+        return tp;
+error:
+        kfree(tp->call.name);
+        kfree(tp->symbol);
+        kfree(tp);
+        return ERR_PTR(-ENOMEM);
+}
+
+static void free_probe_arg(struct probe_arg *arg)
+{
+        if (arg->fetch.func == fetch_symbol)
+                free_symbol_cache(arg->fetch.data);
+        else if (arg->fetch.func == fetch_indirect)
+                free_indirect_fetch_data(arg->fetch.data);
+        kfree(arg->name);
+}
+
+static void free_trace_probe(struct trace_probe *tp)
+{
+        int i;
+
+        for (i = 0; i < tp->nr_args; i++)
+                free_probe_arg(&tp->args[i]);
+
+        kfree(tp->call.system);
+        kfree(tp->call.name);
+        kfree(tp->symbol);
+        kfree(tp);
+}
+
+static struct trace_probe *find_probe_event(const char *event,
+                                            const char *group)
+{
+        struct trace_probe *tp;
+
+        list_for_each_entry(tp, &probe_list, list)
+                if (strcmp(tp->call.name, event) == 0 &&
+                    strcmp(tp->call.system, group) == 0)
+                        return tp;
+        return NULL;
+}
+
+/* Unregister a trace_probe and probe_event: call with locking probe_lock */
+static void unregister_trace_probe(struct trace_probe *tp)
+{
+        if (probe_is_return(tp))
+                unregister_kretprobe(&tp->rp);
+        else
+                unregister_kprobe(&tp->rp.kp);
+        list_del(&tp->list);
+        unregister_probe_event(tp);
+}
+
+/* Register a trace_probe and probe_event */
+static int register_trace_probe(struct trace_probe *tp)
+{
+        struct trace_probe *old_tp;
+        int ret;
+
+        mutex_lock(&probe_lock);
+
+        /* register as an event */
+        old_tp = find_probe_event(tp->call.name, tp->call.system);
+        if (old_tp) {
+                /* delete old event */
+                unregister_trace_probe(old_tp);
+                free_trace_probe(old_tp);
+        }
+        ret = register_probe_event(tp);
+        if (ret) {
+                pr_warning("Faild to register probe event(%d)\n", ret);
+                goto end;
+        }
+
+        tp->rp.kp.flags |= KPROBE_FLAG_DISABLED;
+        if (probe_is_return(tp))
+                ret = register_kretprobe(&tp->rp);
+        else
+                ret = register_kprobe(&tp->rp.kp);
+
+        if (ret) {
+                pr_warning("Could not insert probe(%d)\n", ret);
+                if (ret == -EILSEQ) {
+                        pr_warning("Probing address(0x%p) is not an "
+                                   "instruction boundary.\n",
+                                   tp->rp.kp.addr);
+                        ret = -EINVAL;
+                }
+                unregister_probe_event(tp);
+        } else
+                list_add_tail(&tp->list, &probe_list);
+end:
+        mutex_unlock(&probe_lock);
+        return ret;
+}
+
+/* Split symbol and offset. */
+static int split_symbol_offset(char *symbol, unsigned long *offset)
+{
+        char *tmp;
+        int ret;
+
+        if (!offset)
+                return -EINVAL;
+
+        tmp = strchr(symbol, '+');
+        if (tmp) {
+                /* skip sign because strict_strtol doesn't accept '+' */
+                ret = strict_strtoul(tmp + 1, 0, offset);
+                if (ret)
+                        return ret;
+                *tmp = '\0';
+        } else
+                *offset = 0;
+        return 0;
+}
+
+#define PARAM_MAX_ARGS 16
+#define PARAM_MAX_STACK (THREAD_SIZE / sizeof(unsigned long))
+
+static int parse_probe_vars(char *arg, struct fetch_func *ff, int is_return)
+{
+        int ret = 0;
+        unsigned long param;
+
+        if (strcmp(arg, "retval") == 0) {
+                if (is_return) {
+                        ff->func = fetch_retvalue;
+                        ff->data = NULL;
+                } else
+                        ret = -EINVAL;
+        } else if (strncmp(arg, "stack", 5) == 0) {
+                if (arg[5] == '\0') {
+                        ff->func = fetch_stack_address;
+                        ff->data = NULL;
+                } else if (isdigit(arg[5])) {
+                        ret = strict_strtoul(arg + 5, 10, &param);
+                        if (ret || param > PARAM_MAX_STACK)
+                                ret = -EINVAL;
+                        else {
+                                ff->func = fetch_stack;
+                                ff->data = (void *)param;
+                        }
+                } else
+                        ret = -EINVAL;
+        } else if (strncmp(arg, "arg", 3) == 0 && isdigit(arg[3])) {
+                ret = strict_strtoul(arg + 3, 10, &param);
+                if (ret || param > PARAM_MAX_ARGS)
+                        ret = -EINVAL;
+                else {
+                        ff->func = fetch_argument;
+                        ff->data = (void *)param;
+                }
+        } else
+                ret = -EINVAL;
+        return ret;
+}
+
+/* Recursive argument parser */
+static int __parse_probe_arg(char *arg, struct fetch_func *ff, int is_return)
+{
+        int ret = 0;
+        unsigned long param;
+        long offset;
+        char *tmp;
+
+        switch (arg[0]) {
+        case '$':
+                ret = parse_probe_vars(arg + 1, ff, is_return);
+                break;
+        case '%':       /* named register */
+                ret = regs_query_register_offset(arg + 1);
+                if (ret >= 0) {
+                        ff->func = fetch_register;
+                        ff->data = (void *)(unsigned long)ret;
+                        ret = 0;
+                }
+                break;
+        case '@':       /* memory or symbol */
+                if (isdigit(arg[1])) {
+                        ret = strict_strtoul(arg + 1, 0, &param);
+                        if (ret)
+                                break;
+                        ff->func = fetch_memory;
+                        ff->data = (void *)param;
+                } else {
+                        ret = split_symbol_offset(arg + 1, &offset);
+                        if (ret)
+                                break;
+                        ff->data = alloc_symbol_cache(arg + 1, offset);
+                        if (ff->data)
+                                ff->func = fetch_symbol;
+                        else
+                                ret = -EINVAL;
+                }
+                break;
+        case '+':       /* indirect memory */
+        case '-':
+                tmp = strchr(arg, '(');
+                if (!tmp) {
+                        ret = -EINVAL;
+                        break;
+                }
+                *tmp = '\0';
+                ret = strict_strtol(arg + 1, 0, &offset);
+                if (ret)
+                        break;
+                if (arg[0] == '-')
+                        offset = -offset;
+                arg = tmp + 1;
+                tmp = strrchr(arg, ')');
+                if (tmp) {
+                        struct indirect_fetch_data *id;
+                        *tmp = '\0';
+                        id = kzalloc(sizeof(struct indirect_fetch_data),
+                                     GFP_KERNEL);
+                        if (!id)
+                                return -ENOMEM;
+                        id->offset = offset;
+                        ret = __parse_probe_arg(arg, &id->orig, is_return);
+                        if (ret)
+                                kfree(id);
+                        else {
+                                ff->func = fetch_indirect;
+                                ff->data = (void *)id;
+                        }
+                } else
+                        ret = -EINVAL;
+                break;
+        default:
+                /* TODO: support custom handler */
+                ret = -EINVAL;
+        }
+        return ret;
+}
+
+/* String length checking wrapper */
+static int parse_probe_arg(char *arg, struct fetch_func *ff, int is_return)
+{
+        if (strlen(arg) > MAX_ARGSTR_LEN) {
+                pr_info("Argument is too long.: %s\n",  arg);
+                return -ENOSPC;
+        }
+        return __parse_probe_arg(arg, ff, is_return);
+}
+
+/* Return 1 if name is reserved or already used by another argument */
+static int conflict_field_name(const char *name,
+                               struct probe_arg *args, int narg)
+{
+        int i;
+        for (i = 0; i < ARRAY_SIZE(reserved_field_names); i++)
+                if (strcmp(reserved_field_names[i], name) == 0)
+                        return 1;
+        for (i = 0; i < narg; i++)
+                if (strcmp(args[i].name, name) == 0)
+                        return 1;
+        return 0;
+}
+
+static int create_trace_probe(int argc, char **argv)
+{
+        /*
+         * Argument syntax:
+         *  - Add kprobe: p[:[GRP/]EVENT] KSYM[+OFFS]|KADDR [FETCHARGS]
+         *  - Add kretprobe: r[:[GRP/]EVENT] KSYM[+0] [FETCHARGS]
+         * Fetch args:
+         *  $argN       : fetch Nth of function argument. (N:0-)
+         *  $retval     : fetch return value
+         *  $stack      : fetch stack address
+         *  $stackN     : fetch Nth of stack (N:0-)
+         *  @ADDR       : fetch memory at ADDR (ADDR should be in kernel)
+         *  @SYM[+|-offs] : fetch memory at SYM +|- offs (SYM is a data symbol)
+         *  %REG        : fetch register REG
+         * Indirect memory fetch:
+         *  +|-offs(ARG) : fetch memory at ARG +|- offs address.
+         * Alias name of args:
+         *  NAME=FETCHARG : set NAME as alias of FETCHARG.
+         */
+        struct trace_probe *tp;
+        int i, ret = 0;
+        int is_return = 0, is_delete = 0;
+        char *symbol = NULL, *event = NULL, *arg = NULL, *group = NULL;
+        unsigned long offset = 0;
+        void *addr = NULL;
+        char buf[MAX_EVENT_NAME_LEN];
+
+        /* argc must be >= 1 */
+        if (argv[0][0] == 'p')
+                is_return = 0;
+        else if (argv[0][0] == 'r')
+                is_return = 1;
+        else if (argv[0][0] == '-')
+                is_delete = 1;
+        else {
+                pr_info("Probe definition must be started with 'p', 'r' or"
+                        " '-'.\n");
+                return -EINVAL;
+        }
+
+        if (argv[0][1] == ':') {
+                event = &argv[0][2];
+                if (strchr(event, '/')) {
+                        group = event;
+                        event = strchr(group, '/') + 1;
+                        event[-1] = '\0';
+                        if (strlen(group) == 0) {
+                                pr_info("Group name is not specifiled\n");
+                                return -EINVAL;
+                        }
+                }
+                if (strlen(event) == 0) {
+                        pr_info("Event name is not specifiled\n");
+                        return -EINVAL;
+                }
+        }
+        if (!group)
+                group = KPROBE_EVENT_SYSTEM;
+
+        if (is_delete) {
+                if (!event) {
+                        pr_info("Delete command needs an event name.\n");
+                        return -EINVAL;
+                }
+                tp = find_probe_event(event, group);
+                if (!tp) {
+                        pr_info("Event %s/%s doesn't exist.\n", group, event);
+                        return -ENOENT;
+                }
+                /* delete an event */
+                unregister_trace_probe(tp);
+                free_trace_probe(tp);
+                return 0;
+        }
+
+        if (argc < 2) {
+                pr_info("Probe point is not specified.\n");
+                return -EINVAL;
+        }
+        if (isdigit(argv[1][0])) {
+                if (is_return) {
+                        pr_info("Return probe point must be a symbol.\n");
+                        return -EINVAL;
+                }
+                /* an address specified */
+                ret = strict_strtoul(&argv[0][2], 0, (unsigned long *)&addr);
+                if (ret) {
+                        pr_info("Failed to parse address.\n");
+                        return ret;
+                }
+        } else {
+                /* a symbol specified */
+                symbol = argv[1];
+                /* TODO: support .init module functions */
+                ret = split_symbol_offset(symbol, &offset);
+                if (ret) {
+                        pr_info("Failed to parse symbol.\n");
+                        return ret;
+                }
+                if (offset && is_return) {
+                        pr_info("Return probe must be used without offset.\n");
+                        return -EINVAL;
+                }
+        }
+        argc -= 2; argv += 2;
+
+        /* setup a probe */
+        if (!event) {
+                /* Make a new event name */
+                if (symbol)
+                        snprintf(buf, MAX_EVENT_NAME_LEN, "%c@%s%+ld",
+                                 is_return ? 'r' : 'p', symbol, offset);
+                else
+                        snprintf(buf, MAX_EVENT_NAME_LEN, "%c@0x%p",
+                                 is_return ? 'r' : 'p', addr);
+                event = buf;
+        }
+        tp = alloc_trace_probe(group, event, addr, symbol, offset, argc,
+                               is_return);
+        if (IS_ERR(tp)) {
+                pr_info("Failed to allocate trace_probe.(%d)\n",
+                        (int)PTR_ERR(tp));
+                return PTR_ERR(tp);
+        }
+
+        /* parse arguments */
+        ret = 0;
+        for (i = 0; i < argc && i < MAX_TRACE_ARGS; i++) {
+                /* Parse argument name */
+                arg = strchr(argv[i], '=');
+                if (arg)
+                        *arg++ = '\0';
+                else
+                        arg = argv[i];
+
+                if (conflict_field_name(argv[i], tp->args, i)) {
+                        pr_info("Argument%d name '%s' conflicts with "
+                                "another field.\n", i, argv[i]);
+                        ret = -EINVAL;
+                        goto error;
+                }
+
+                tp->args[i].name = kstrdup(argv[i], GFP_KERNEL);
+                if (!tp->args[i].name) {
+                        pr_info("Failed to allocate argument%d name '%s'.\n",
+                                i, argv[i]);
+                        ret = -ENOMEM;
+                        goto error;
+                }
+
+                /* Parse fetch argument */
+                ret = parse_probe_arg(arg, &tp->args[i].fetch, is_return);
+                if (ret) {
+                        pr_info("Parse error at argument%d. (%d)\n", i, ret);
+                        kfree(tp->args[i].name);
+                        goto error;
+                }
+
+                tp->nr_args++;
+        }
+
+        ret = register_trace_probe(tp);
+        if (ret)
+                goto error;
+        return 0;
+
+error:
+        free_trace_probe(tp);
+        return ret;
+}
+
+static void cleanup_all_probes(void)
+{
+        struct trace_probe *tp;
+
+        mutex_lock(&probe_lock);
+        /* TODO: Use batch unregistration */
+        while (!list_empty(&probe_list)) {
+                tp = list_entry(probe_list.next, struct trace_probe, list);
+                unregister_trace_probe(tp);
+                free_trace_probe(tp);
+        }
+        mutex_unlock(&probe_lock);
+}
+
+
+/* Probes listing interfaces */
+static void *probes_seq_start(struct seq_file *m, loff_t *pos)
+{
+        mutex_lock(&probe_lock);
+        return seq_list_start(&probe_list, *pos);
+}
+
+static void *probes_seq_next(struct seq_file *m, void *v, loff_t *pos)
+{
+        return seq_list_next(v, &probe_list, pos);
+}
+
+static void probes_seq_stop(struct seq_file *m, void *v)
+{
+        mutex_unlock(&probe_lock);
+}
+
+static int probes_seq_show(struct seq_file *m, void *v)
+{
+        struct trace_probe *tp = v;
+        int i, ret;
+        char buf[MAX_ARGSTR_LEN + 1];
+
+        seq_printf(m, "%c", probe_is_return(tp) ? 'r' : 'p');
+        seq_printf(m, ":%s/%s", tp->call.system, tp->call.name);
+
+        if (!tp->symbol)
+                seq_printf(m, " 0x%p", tp->rp.kp.addr);
+        else if (tp->rp.kp.offset)
+                seq_printf(m, " %s+%u", probe_symbol(tp), tp->rp.kp.offset);
+        else
+                seq_printf(m, " %s", probe_symbol(tp));
+
+        for (i = 0; i < tp->nr_args; i++) {
+                ret = probe_arg_string(buf, MAX_ARGSTR_LEN, &tp->args[i].fetch);
+                if (ret < 0) {
+                        pr_warning("Argument%d decoding error(%d).\n", i, ret);
+                        return ret;
+                }
+                seq_printf(m, " %s=%s", tp->args[i].name, buf);
+        }
+        seq_printf(m, "\n");
+        return 0;
+}
+
+static const struct seq_operations probes_seq_op = {
+        .start  = probes_seq_start,
+        .next   = probes_seq_next,
+        .stop   = probes_seq_stop,
+        .show   = probes_seq_show
+};
+
+static int probes_open(struct inode *inode, struct file *file)
+{
+        if ((file->f_mode & FMODE_WRITE) &&
+            (file->f_flags & O_TRUNC))
+                cleanup_all_probes();
+
+        return seq_open(file, &probes_seq_op);
+}
+
+static int command_trace_probe(const char *buf)
+{
+        char **argv;
+        int argc = 0, ret = 0;
+
+        argv = argv_split(GFP_KERNEL, buf, &argc);
+        if (!argv)
+                return -ENOMEM;
+
+        if (argc)
+                ret = create_trace_probe(argc, argv);
+
+        argv_free(argv);
+        return ret;
+}
+
+#define WRITE_BUFSIZE 128
+
+static ssize_t probes_write(struct file *file, const char __user *buffer,
+                            size_t count, loff_t *ppos)
+{
+        char *kbuf, *tmp;
+        int ret;
+        size_t done;
+        size_t size;
+
+        kbuf = kmalloc(WRITE_BUFSIZE, GFP_KERNEL);
+        if (!kbuf)
+                return -ENOMEM;
+
+        ret = done = 0;
+        while (done < count) {
+                size = count - done;
+                if (size >= WRITE_BUFSIZE)
+                        size = WRITE_BUFSIZE - 1;
+                if (copy_from_user(kbuf, buffer + done, size)) {
+                        ret = -EFAULT;
+                        goto out;
+                }
+                kbuf[size] = '\0';
+                tmp = strchr(kbuf, '\n');
+                if (tmp) {
+                        *tmp = '\0';
+                        size = tmp - kbuf + 1;
+                } else if (done + size < count) {
+                        pr_warning("Line length is too long: "
+                                   "Should be less than %d.", WRITE_BUFSIZE);
+                        ret = -EINVAL;
+                        goto out;
+                }
+                done += size;
+                /* Remove comments */
+                tmp = strchr(kbuf, '#');
+                if (tmp)
+                        *tmp = '\0';
+
+                ret = command_trace_probe(kbuf);
+                if (ret)
+                        goto out;
+        }
+        ret = done;
+out:
+        kfree(kbuf);
+        return ret;
+}
+
+static const struct file_operations kprobe_events_ops = {
+        .owner          = THIS_MODULE,
+        .open           = probes_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = seq_release,
+        .write          = probes_write,
+};
+
+/* Probes profiling interfaces */
+static int probes_profile_seq_show(struct seq_file *m, void *v)
+{
+        struct trace_probe *tp = v;
+
+        seq_printf(m, "  %-44s %15lu %15lu\n", tp->call.name, tp->nhit,
+                   tp->rp.kp.nmissed);
+
+        return 0;
+}
+
+static const struct seq_operations profile_seq_op = {
+        .start  = probes_seq_start,
+        .next   = probes_seq_next,
+        .stop   = probes_seq_stop,
+        .show   = probes_profile_seq_show
+};
+
+static int profile_open(struct inode *inode, struct file *file)
+{
+        return seq_open(file, &profile_seq_op);
+}
+
+static const struct file_operations kprobe_profile_ops = {
+        .owner          = THIS_MODULE,
+        .open           = profile_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = seq_release,
+};
+
+/* Kprobe handler */
+static __kprobes int kprobe_trace_func(struct kprobe *kp, struct pt_regs *regs)
+{
+        struct trace_probe *tp = container_of(kp, struct trace_probe, rp.kp);
+        struct kprobe_trace_entry *entry;
+        struct ring_buffer_event *event;
+        struct ring_buffer *buffer;
+        int size, i, pc;
+        unsigned long irq_flags;
+        struct ftrace_event_call *call = &tp->call;
+
+        tp->nhit++;
+
+        local_save_flags(irq_flags);
+        pc = preempt_count();
+
+        size = SIZEOF_KPROBE_TRACE_ENTRY(tp->nr_args);
+
+        event = trace_current_buffer_lock_reserve(&buffer, call->id, size,
+                                                  irq_flags, pc);
+        if (!event)
+                return 0;
+
+        entry = ring_buffer_event_data(event);
+        entry->nargs = tp->nr_args;
+        entry->ip = (unsigned long)kp->addr;
+        for (i = 0; i < tp->nr_args; i++)
+                entry->args[i] = call_fetch(&tp->args[i].fetch, regs);
+
+        if (!filter_current_check_discard(buffer, call, entry, event))
+                trace_nowake_buffer_unlock_commit(buffer, event, irq_flags, pc);
+        return 0;
+}
+
+/* Kretprobe handler */
+static __kprobes int kretprobe_trace_func(struct kretprobe_instance *ri,
+                                          struct pt_regs *regs)
+{
+        struct trace_probe *tp = container_of(ri->rp, struct trace_probe, rp);
+        struct kretprobe_trace_entry *entry;
+        struct ring_buffer_event *event;
+        struct ring_buffer *buffer;
+        int size, i, pc;
+        unsigned long irq_flags;
+        struct ftrace_event_call *call = &tp->call;
+
+        local_save_flags(irq_flags);
+        pc = preempt_count();
+
+        size = SIZEOF_KRETPROBE_TRACE_ENTRY(tp->nr_args);
+
+        event = trace_current_buffer_lock_reserve(&buffer, call->id, size,
+                                                  irq_flags, pc);
+        if (!event)
+                return 0;
+
+        entry = ring_buffer_event_data(event);
+        entry->nargs = tp->nr_args;
+        entry->func = (unsigned long)tp->rp.kp.addr;
+        entry->ret_ip = (unsigned long)ri->ret_addr;
+        for (i = 0; i < tp->nr_args; i++)
+                entry->args[i] = call_fetch(&tp->args[i].fetch, regs);
+
+        if (!filter_current_check_discard(buffer, call, entry, event))
+                trace_nowake_buffer_unlock_commit(buffer, event, irq_flags, pc);
+
+        return 0;
+}
+
+/* Event entry printers */
+enum print_line_t
+print_kprobe_event(struct trace_iterator *iter, int flags)
+{
+        struct kprobe_trace_entry *field;
+        struct trace_seq *s = &iter->seq;
+        struct trace_event *event;
+        struct trace_probe *tp;
+        int i;
+
+        field = (struct kprobe_trace_entry *)iter->ent;
+        event = ftrace_find_event(field->ent.type);
+        tp = container_of(event, struct trace_probe, event);
+
+        if (!trace_seq_printf(s, "%s: (", tp->call.name))
+                goto partial;
+
+        if (!seq_print_ip_sym(s, field->ip, flags | TRACE_ITER_SYM_OFFSET))
+                goto partial;
+
+        if (!trace_seq_puts(s, ")"))
+                goto partial;
+
+        for (i = 0; i < field->nargs; i++)
+                if (!trace_seq_printf(s, " %s=%lx",
+                                      tp->args[i].name, field->args[i]))
+                        goto partial;
+
+        if (!trace_seq_puts(s, "\n"))
+                goto partial;
+
+        return TRACE_TYPE_HANDLED;
+partial:
+        return TRACE_TYPE_PARTIAL_LINE;
+}
+
+enum print_line_t
+print_kretprobe_event(struct trace_iterator *iter, int flags)
+{
+        struct kretprobe_trace_entry *field;
+        struct trace_seq *s = &iter->seq;
+        struct trace_event *event;
+        struct trace_probe *tp;
+        int i;
+
+        field = (struct kretprobe_trace_entry *)iter->ent;
+        event = ftrace_find_event(field->ent.type);
+        tp = container_of(event, struct trace_probe, event);
+
+        if (!trace_seq_printf(s, "%s: (", tp->call.name))
+                goto partial;
+
+        if (!seq_print_ip_sym(s, field->ret_ip, flags | TRACE_ITER_SYM_OFFSET))
+                goto partial;
+
+        if (!trace_seq_puts(s, " <- "))
+                goto partial;
+
+        if (!seq_print_ip_sym(s, field->func, flags & ~TRACE_ITER_SYM_OFFSET))
+                goto partial;
+
+        if (!trace_seq_puts(s, ")"))
+                goto partial;
+
+        for (i = 0; i < field->nargs; i++)
+                if (!trace_seq_printf(s, " %s=%lx",
+                                      tp->args[i].name, field->args[i]))
+                        goto partial;
+
+        if (!trace_seq_puts(s, "\n"))
+                goto partial;
+
+        return TRACE_TYPE_HANDLED;
+partial:
+        return TRACE_TYPE_PARTIAL_LINE;
+}
+
+static int probe_event_enable(struct ftrace_event_call *call)
+{
+        struct trace_probe *tp = (struct trace_probe *)call->data;
+
+        tp->flags |= TP_FLAG_TRACE;
+        if (probe_is_return(tp))
+                return enable_kretprobe(&tp->rp);
+        else
+                return enable_kprobe(&tp->rp.kp);
+}
+
+static void probe_event_disable(struct ftrace_event_call *call)
+{
+        struct trace_probe *tp = (struct trace_probe *)call->data;
+
+        tp->flags &= ~TP_FLAG_TRACE;
+        if (!(tp->flags & (TP_FLAG_TRACE | TP_FLAG_PROFILE))) {
+                if (probe_is_return(tp))
+                        disable_kretprobe(&tp->rp);
+                else
+                        disable_kprobe(&tp->rp.kp);
+        }
+}
+
+static int probe_event_raw_init(struct ftrace_event_call *event_call)
+{
+        INIT_LIST_HEAD(&event_call->fields);
+
+        return 0;
+}
+
+#undef DEFINE_FIELD
+#define DEFINE_FIELD(type, item, name, is_signed)                       \
+        do {                                                            \
+                ret = trace_define_field(event_call, #type, name,       \
+                                         offsetof(typeof(field), item), \
+                                         sizeof(field.item), is_signed, \
+                                         FILTER_OTHER);                 \
+                if (ret)                                                \
+                        return ret;                                     \
+        } while (0)
+
+static int kprobe_event_define_fields(struct ftrace_event_call *event_call)
+{
+        int ret, i;
+        struct kprobe_trace_entry field;
+        struct trace_probe *tp = (struct trace_probe *)event_call->data;
+
+        DEFINE_FIELD(unsigned long, ip, FIELD_STRING_IP, 0);
+        DEFINE_FIELD(int, nargs, FIELD_STRING_NARGS, 1);
+        /* Set argument names as fields */
+        for (i = 0; i < tp->nr_args; i++)
+                DEFINE_FIELD(unsigned long, args[i], tp->args[i].name, 0);
+        return 0;
+}
+
+static int kretprobe_event_define_fields(struct ftrace_event_call *event_call)
+{
+        int ret, i;
+        struct kretprobe_trace_entry field;
+        struct trace_probe *tp = (struct trace_probe *)event_call->data;
+
+        DEFINE_FIELD(unsigned long, func, FIELD_STRING_FUNC, 0);
+        DEFINE_FIELD(unsigned long, ret_ip, FIELD_STRING_RETIP, 0);
+        DEFINE_FIELD(int, nargs, FIELD_STRING_NARGS, 1);
+        /* Set argument names as fields */
+        for (i = 0; i < tp->nr_args; i++)
+                DEFINE_FIELD(unsigned long, args[i], tp->args[i].name, 0);
+        return 0;
+}
+
+static int __probe_event_show_format(struct trace_seq *s,
+                                     struct trace_probe *tp, const char *fmt,
+                                     const char *arg)
+{
+        int i;
+
+        /* Show format */
+        if (!trace_seq_printf(s, "\nprint fmt: \"%s", fmt))
+                return 0;
+
+        for (i = 0; i < tp->nr_args; i++)
+                if (!trace_seq_printf(s, " %s=%%lx", tp->args[i].name))
+                        return 0;
+
+        if (!trace_seq_printf(s, "\", %s", arg))
+                return 0;
+
+        for (i = 0; i < tp->nr_args; i++)
+                if (!trace_seq_printf(s, ", REC->%s", tp->args[i].name))
+                        return 0;
+
+        return trace_seq_puts(s, "\n");
+}
+
+#undef SHOW_FIELD
+#define SHOW_FIELD(type, item, name)                                    \
+        do {                                                            \
+                ret = trace_seq_printf(s, "\tfield: " #type " %s;\t"    \
+                                "offset:%u;\tsize:%u;\n", name,         \
+                                (unsigned int)offsetof(typeof(field), item),\
+                                (unsigned int)sizeof(type));            \
+                if (!ret)                                               \
+                        return 0;                                       \
+        } while (0)
+
+static int kprobe_event_show_format(struct ftrace_event_call *call,
+                                    struct trace_seq *s)
+{
+        struct kprobe_trace_entry field __attribute__((unused));
+        int ret, i;
+        struct trace_probe *tp = (struct trace_probe *)call->data;
+
+        SHOW_FIELD(unsigned long, ip, FIELD_STRING_IP);
+        SHOW_FIELD(int, nargs, FIELD_STRING_NARGS);
+
+        /* Show fields */
+        for (i = 0; i < tp->nr_args; i++)
+                SHOW_FIELD(unsigned long, args[i], tp->args[i].name);
+        trace_seq_puts(s, "\n");
+
+        return __probe_event_show_format(s, tp, "(%lx)",
+                                         "REC->" FIELD_STRING_IP);
+}
+
+static int kretprobe_event_show_format(struct ftrace_event_call *call,
+                                       struct trace_seq *s)
+{
+        struct kretprobe_trace_entry field __attribute__((unused));
+        int ret, i;
+        struct trace_probe *tp = (struct trace_probe *)call->data;
+
+        SHOW_FIELD(unsigned long, func, FIELD_STRING_FUNC);
+        SHOW_FIELD(unsigned long, ret_ip, FIELD_STRING_RETIP);
+        SHOW_FIELD(int, nargs, FIELD_STRING_NARGS);
+
+        /* Show fields */
+        for (i = 0; i < tp->nr_args; i++)
+                SHOW_FIELD(unsigned long, args[i], tp->args[i].name);
+        trace_seq_puts(s, "\n");
+
+        return __probe_event_show_format(s, tp, "(%lx <- %lx)",
+                                         "REC->" FIELD_STRING_FUNC
+                                         ", REC->" FIELD_STRING_RETIP);
+}
+
+#ifdef CONFIG_EVENT_PROFILE
+
+/* Kprobe profile handler */
+static __kprobes int kprobe_profile_func(struct kprobe *kp,
+                                         struct pt_regs *regs)
+{
+        struct trace_probe *tp = container_of(kp, struct trace_probe, rp.kp);
+        struct ftrace_event_call *call = &tp->call;
+        struct kprobe_trace_entry *entry;
+        struct trace_entry *ent;
+        int size, __size, i, pc, __cpu;
+        unsigned long irq_flags;
+        char *trace_buf;
+        char *raw_data;
+        int rctx;
+
+        pc = preempt_count();
+        __size = SIZEOF_KPROBE_TRACE_ENTRY(tp->nr_args);
+        size = ALIGN(__size + sizeof(u32), sizeof(u64));
+        size -= sizeof(u32);
+        if (WARN_ONCE(size > FTRACE_MAX_PROFILE_SIZE,
+                     "profile buffer not large enough"))
+                return 0;
+
+        /*
+         * Protect the non nmi buffer
+         * This also protects the rcu read side
+         */
+        local_irq_save(irq_flags);
+
+        rctx = perf_swevent_get_recursion_context();
+        if (rctx < 0)
+                goto end_recursion;
+
+        __cpu = smp_processor_id();
+
+        if (in_nmi())
+                trace_buf = rcu_dereference(perf_trace_buf_nmi);
+        else
+                trace_buf = rcu_dereference(perf_trace_buf);
+
+        if (!trace_buf)
+                goto end;
+
+        raw_data = per_cpu_ptr(trace_buf, __cpu);
+
+        /* Zero dead bytes from alignment to avoid buffer leak to userspace */
+        *(u64 *)(&raw_data[size - sizeof(u64)]) = 0ULL;
+        entry = (struct kprobe_trace_entry *)raw_data;
+        ent = &entry->ent;
+
+        tracing_generic_entry_update(ent, irq_flags, pc);
+        ent->type = call->id;
+        entry->nargs = tp->nr_args;
+        entry->ip = (unsigned long)kp->addr;
+        for (i = 0; i < tp->nr_args; i++)
+                entry->args[i] = call_fetch(&tp->args[i].fetch, regs);
+        perf_tp_event(call->id, entry->ip, 1, entry, size);
+
+end:
+        perf_swevent_put_recursion_context(rctx);
+end_recursion:
+        local_irq_restore(irq_flags);
+
+        return 0;
+}
+
+/* Kretprobe profile handler */
+static __kprobes int kretprobe_profile_func(struct kretprobe_instance *ri,
+                                            struct pt_regs *regs)
+{
+        struct trace_probe *tp = container_of(ri->rp, struct trace_probe, rp);
+        struct ftrace_event_call *call = &tp->call;
+        struct kretprobe_trace_entry *entry;
+        struct trace_entry *ent;
+        int size, __size, i, pc, __cpu;
+        unsigned long irq_flags;
+        char *trace_buf;
+        char *raw_data;
+        int rctx;
+
+        pc = preempt_count();
+        __size = SIZEOF_KRETPROBE_TRACE_ENTRY(tp->nr_args);
+        size = ALIGN(__size + sizeof(u32), sizeof(u64));
+        size -= sizeof(u32);
+        if (WARN_ONCE(size > FTRACE_MAX_PROFILE_SIZE,
+                     "profile buffer not large enough"))
+                return 0;
+
+        /*
+         * Protect the non nmi buffer
+         * This also protects the rcu read side
+         */
+        local_irq_save(irq_flags);
+
+        rctx = perf_swevent_get_recursion_context();
+        if (rctx < 0)
+                goto end_recursion;
+
+        __cpu = smp_processor_id();
+
+        if (in_nmi())
+                trace_buf = rcu_dereference(perf_trace_buf_nmi);
+        else
+                trace_buf = rcu_dereference(perf_trace_buf);
+
+        if (!trace_buf)
+                goto end;
+
+        raw_data = per_cpu_ptr(trace_buf, __cpu);
+
+        /* Zero dead bytes from alignment to avoid buffer leak to userspace */
+        *(u64 *)(&raw_data[size - sizeof(u64)]) = 0ULL;
+        entry = (struct kretprobe_trace_entry *)raw_data;
+        ent = &entry->ent;
+
+        tracing_generic_entry_update(ent, irq_flags, pc);
+        ent->type = call->id;
+        entry->nargs = tp->nr_args;
+        entry->func = (unsigned long)tp->rp.kp.addr;
+        entry->ret_ip = (unsigned long)ri->ret_addr;
+        for (i = 0; i < tp->nr_args; i++)
+                entry->args[i] = call_fetch(&tp->args[i].fetch, regs);
+        perf_tp_event(call->id, entry->ret_ip, 1, entry, size);
+
+end:
+        perf_swevent_put_recursion_context(rctx);
+end_recursion:
+        local_irq_restore(irq_flags);
+
+        return 0;
+}
+
+static int probe_profile_enable(struct ftrace_event_call *call)
+{
+        struct trace_probe *tp = (struct trace_probe *)call->data;
+
+        tp->flags |= TP_FLAG_PROFILE;
+
+        if (probe_is_return(tp))
+                return enable_kretprobe(&tp->rp);
+        else
+                return enable_kprobe(&tp->rp.kp);
+}
+
+static void probe_profile_disable(struct ftrace_event_call *call)
+{
+        struct trace_probe *tp = (struct trace_probe *)call->data;
+
+        tp->flags &= ~TP_FLAG_PROFILE;
+
+        if (!(tp->flags & TP_FLAG_TRACE)) {
+                if (probe_is_return(tp))
+                        disable_kretprobe(&tp->rp);
+                else
+                        disable_kprobe(&tp->rp.kp);
+        }
+}
+#endif  /* CONFIG_EVENT_PROFILE */
+
+
+static __kprobes
+int kprobe_dispatcher(struct kprobe *kp, struct pt_regs *regs)
+{
+        struct trace_probe *tp = container_of(kp, struct trace_probe, rp.kp);
+
+        if (tp->flags & TP_FLAG_TRACE)
+                kprobe_trace_func(kp, regs);
+#ifdef CONFIG_EVENT_PROFILE
+        if (tp->flags & TP_FLAG_PROFILE)
+                kprobe_profile_func(kp, regs);
+#endif  /* CONFIG_EVENT_PROFILE */
+        return 0;       /* We don't tweek kernel, so just return 0 */
+}
+
+static __kprobes
+int kretprobe_dispatcher(struct kretprobe_instance *ri, struct pt_regs *regs)
+{
+        struct trace_probe *tp = container_of(ri->rp, struct trace_probe, rp);
+
+        if (tp->flags & TP_FLAG_TRACE)
+                kretprobe_trace_func(ri, regs);
+#ifdef CONFIG_EVENT_PROFILE
+        if (tp->flags & TP_FLAG_PROFILE)
+                kretprobe_profile_func(ri, regs);
+#endif  /* CONFIG_EVENT_PROFILE */
+        return 0;       /* We don't tweek kernel, so just return 0 */
+}
+
+static int register_probe_event(struct trace_probe *tp)
+{
+        struct ftrace_event_call *call = &tp->call;
+        int ret;
+
+        /* Initialize ftrace_event_call */
+        if (probe_is_return(tp)) {
+                tp->event.trace = print_kretprobe_event;
+                call->raw_init = probe_event_raw_init;
+                call->show_format = kretprobe_event_show_format;
+                call->define_fields = kretprobe_event_define_fields;
+        } else {
+                tp->event.trace = print_kprobe_event;
+                call->raw_init = probe_event_raw_init;
+                call->show_format = kprobe_event_show_format;
+                call->define_fields = kprobe_event_define_fields;
+        }
+        call->event = &tp->event;
+        call->id = register_ftrace_event(&tp->event);
+        if (!call->id)
+                return -ENODEV;
+        call->enabled = 0;
+        call->regfunc = probe_event_enable;
+        call->unregfunc = probe_event_disable;
+
+#ifdef CONFIG_EVENT_PROFILE
+        call->profile_enable = probe_profile_enable;
+        call->profile_disable = probe_profile_disable;
+#endif
+        call->data = tp;
+        ret = trace_add_event_call(call);
+        if (ret) {
+                pr_info("Failed to register kprobe event: %s\n", call->name);
+                unregister_ftrace_event(&tp->event);
+        }
+        return ret;
+}
+
+static void unregister_probe_event(struct trace_probe *tp)
+{
+        /* tp->event is unregistered in trace_remove_event_call() */
+        trace_remove_event_call(&tp->call);
+}
+
+/* Make a debugfs interface for controling probe points */
+static __init int init_kprobe_trace(void)
+{
+        struct dentry *d_tracer;
+        struct dentry *entry;
+
+        d_tracer = tracing_init_dentry();
+        if (!d_tracer)
+                return 0;
+
+        entry = debugfs_create_file("kprobe_events", 0644, d_tracer,
+                                    NULL, &kprobe_events_ops);
+
+        /* Event list interface */
+        if (!entry)
+                pr_warning("Could not create debugfs "
+                           "'kprobe_events' entry\n");
+
+        /* Profile interface */
+        entry = debugfs_create_file("kprobe_profile", 0444, d_tracer,
+                                    NULL, &kprobe_profile_ops);
+
+        if (!entry)
+                pr_warning("Could not create debugfs "
+                           "'kprobe_profile' entry\n");
+        return 0;
+}
+fs_initcall(init_kprobe_trace);
+
+
+#ifdef CONFIG_FTRACE_STARTUP_TEST
+
+static int kprobe_trace_selftest_target(int a1, int a2, int a3,
+                                        int a4, int a5, int a6)
+{
+        return a1 + a2 + a3 + a4 + a5 + a6;
+}
+
+static __init int kprobe_trace_self_tests_init(void)
+{
+        int ret;
+        int (*target)(int, int, int, int, int, int);
+
+        target = kprobe_trace_selftest_target;
+
+        pr_info("Testing kprobe tracing: ");
+
+        ret = command_trace_probe("p:testprobe kprobe_trace_selftest_target "
+                                  "$arg1 $arg2 $arg3 $arg4 $stack $stack0");
+        if (WARN_ON_ONCE(ret))
+                pr_warning("error enabling function entry\n");
+
+        ret = command_trace_probe("r:testprobe2 kprobe_trace_selftest_target "
+                                  "$retval");
+        if (WARN_ON_ONCE(ret))
+                pr_warning("error enabling function return\n");
+
+        ret = target(1, 2, 3, 4, 5, 6);
+
+        cleanup_all_probes();
+
+        pr_cont("OK\n");
+        return 0;
+}
+
+late_initcall(kprobe_trace_self_tests_init);
+
+#endif
diff --git a/kernel/trace/trace_ksym.c b/kernel/trace/trace_ksym.c
new file mode 100644
index 000000000000..faf37fa4408c
--- /dev/null
+++ b/kernel/trace/trace_ksym.c
@@ -0,0 +1,545 @@
+/*
+ * trace_ksym.c - Kernel Symbol Tracer
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) IBM Corporation, 2009
+ */
+
+#include <linux/kallsyms.h>
+#include <linux/uaccess.h>
+#include <linux/debugfs.h>
+#include <linux/ftrace.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+
+#include "trace_output.h"
+#include "trace_stat.h"
+#include "trace.h"
+
+#include <linux/hw_breakpoint.h>
+#include <asm/hw_breakpoint.h>
+
+/*
+ * For now, let us restrict the no. of symbols traced simultaneously to number
+ * of available hardware breakpoint registers.
+ */
+#define KSYM_TRACER_MAX HBP_NUM
+
+#define KSYM_TRACER_OP_LEN 3 /* rw- */
+
+struct trace_ksym {
+        struct perf_event       **ksym_hbp;
+        struct perf_event_attr  attr;
+#ifdef CONFIG_PROFILE_KSYM_TRACER
+        unsigned long           counter;
+#endif
+        struct hlist_node       ksym_hlist;
+};
+
+static struct trace_array *ksym_trace_array;
+
+static unsigned int ksym_filter_entry_count;
+static unsigned int ksym_tracing_enabled;
+
+static HLIST_HEAD(ksym_filter_head);
+
+static DEFINE_MUTEX(ksym_tracer_mutex);
+
+#ifdef CONFIG_PROFILE_KSYM_TRACER
+
+#define MAX_UL_INT 0xffffffff
+
+void ksym_collect_stats(unsigned long hbp_hit_addr)
+{
+        struct hlist_node *node;
+        struct trace_ksym *entry;
+
+        rcu_read_lock();
+        hlist_for_each_entry_rcu(entry, node, &ksym_filter_head, ksym_hlist) {
+                if ((entry->attr.bp_addr == hbp_hit_addr) &&
+                    (entry->counter <= MAX_UL_INT)) {
+                        entry->counter++;
+                        break;
+                }
+        }
+        rcu_read_unlock();
+}
+#endif /* CONFIG_PROFILE_KSYM_TRACER */
+
+void ksym_hbp_handler(struct perf_event *hbp, int nmi,
+                      struct perf_sample_data *data,
+                      struct pt_regs *regs)
+{
+        struct ring_buffer_event *event;
+        struct ksym_trace_entry *entry;
+        struct ring_buffer *buffer;
+        int pc;
+
+        if (!ksym_tracing_enabled)
+                return;
+
+        buffer = ksym_trace_array->buffer;
+
+        pc = preempt_count();
+
+        event = trace_buffer_lock_reserve(buffer, TRACE_KSYM,
+                                                        sizeof(*entry), 0, pc);
+        if (!event)
+                return;
+
+        entry           = ring_buffer_event_data(event);
+        entry->ip       = instruction_pointer(regs);
+        entry->type     = hw_breakpoint_type(hbp);
+        entry->addr     = hw_breakpoint_addr(hbp);
+        strlcpy(entry->cmd, current->comm, TASK_COMM_LEN);
+
+#ifdef CONFIG_PROFILE_KSYM_TRACER
+        ksym_collect_stats(hw_breakpoint_addr(hbp));
+#endif /* CONFIG_PROFILE_KSYM_TRACER */
+
+        trace_buffer_unlock_commit(buffer, event, 0, pc);
+}
+
+/* Valid access types are represented as
+ *
+ * rw- : Set Read/Write Access Breakpoint
+ * -w- : Set Write Access Breakpoint
+ * --- : Clear Breakpoints
+ * --x : Set Execution Break points (Not available yet)
+ *
+ */
+static int ksym_trace_get_access_type(char *str)
+{
+        int access = 0;
+
+        if (str[0] == 'r')
+                access |= HW_BREAKPOINT_R;
+
+        if (str[1] == 'w')
+                access |= HW_BREAKPOINT_W;
+
+        if (str[2] == 'x')
+                access |= HW_BREAKPOINT_X;
+
+        switch (access) {
+        case HW_BREAKPOINT_R:
+        case HW_BREAKPOINT_W:
+        case HW_BREAKPOINT_W | HW_BREAKPOINT_R:
+                return access;
+        default:
+                return -EINVAL;
+        }
+}
+
+/*
+ * There can be several possible malformed requests and we attempt to capture
+ * all of them. We enumerate some of the rules
+ * 1. We will not allow kernel symbols with ':' since it is used as a delimiter.
+ *    i.e. multiple ':' symbols disallowed. Possible uses are of the form
+ *    <module>:<ksym_name>:<op>.
+ * 2. No delimiter symbol ':' in the input string
+ * 3. Spurious operator symbols or symbols not in their respective positions
+ * 4. <ksym_name>:--- i.e. clear breakpoint request when ksym_name not in file
+ * 5. Kernel symbol not a part of /proc/kallsyms
+ * 6. Duplicate requests
+ */
+static int parse_ksym_trace_str(char *input_string, char **ksymname,
+                                                        unsigned long *addr)
+{
+        int ret;
+
+        *ksymname = strsep(&input_string, ":");
+        *addr = kallsyms_lookup_name(*ksymname);
+
+        /* Check for malformed request: (2), (1) and (5) */
+        if ((!input_string) ||
+            (strlen(input_string) != KSYM_TRACER_OP_LEN) ||
+            (*addr == 0))
+                return -EINVAL;;
+
+        ret = ksym_trace_get_access_type(input_string);
+
+        return ret;
+}
+
+int process_new_ksym_entry(char *ksymname, int op, unsigned long addr)
+{
+        struct trace_ksym *entry;
+        int ret = -ENOMEM;
+
+        if (ksym_filter_entry_count >= KSYM_TRACER_MAX) {
+                printk(KERN_ERR "ksym_tracer: Maximum limit:(%d) reached. No"
+                " new requests for tracing can be accepted now.\n",
+                        KSYM_TRACER_MAX);
+                return -ENOSPC;
+        }
+
+        entry = kzalloc(sizeof(struct trace_ksym), GFP_KERNEL);
+        if (!entry)
+                return -ENOMEM;
+
+        hw_breakpoint_init(&entry->attr);
+
+        entry->attr.bp_type = op;
+        entry->attr.bp_addr = addr;
+        entry->attr.bp_len = HW_BREAKPOINT_LEN_4;
+
+        ret = -EAGAIN;
+        entry->ksym_hbp = register_wide_hw_breakpoint(&entry->attr,
+                                        ksym_hbp_handler);
+
+        if (IS_ERR(entry->ksym_hbp)) {
+                ret = PTR_ERR(entry->ksym_hbp);
+                printk(KERN_INFO "ksym_tracer request failed. Try again"
+                                        " later!!\n");
+                goto err;
+        }
+
+        hlist_add_head_rcu(&(entry->ksym_hlist), &ksym_filter_head);
+        ksym_filter_entry_count++;
+
+        return 0;
+
+err:
+        kfree(entry);
+
+        return ret;
+}
+
+static ssize_t ksym_trace_filter_read(struct file *filp, char __user *ubuf,
+                                                size_t count, loff_t *ppos)
+{
+        struct trace_ksym *entry;
+        struct hlist_node *node;
+        struct trace_seq *s;
+        ssize_t cnt = 0;
+        int ret;
+
+        s = kmalloc(sizeof(*s), GFP_KERNEL);
+        if (!s)
+                return -ENOMEM;
+        trace_seq_init(s);
+
+        mutex_lock(&ksym_tracer_mutex);
+
+        hlist_for_each_entry(entry, node, &ksym_filter_head, ksym_hlist) {
+                ret = trace_seq_printf(s, "%pS:",
+                                (void *)(unsigned long)entry->attr.bp_addr);
+                if (entry->attr.bp_type == HW_BREAKPOINT_R)
+                        ret = trace_seq_puts(s, "r--\n");
+                else if (entry->attr.bp_type == HW_BREAKPOINT_W)
+                        ret = trace_seq_puts(s, "-w-\n");
+                else if (entry->attr.bp_type == (HW_BREAKPOINT_W | HW_BREAKPOINT_R))
+                        ret = trace_seq_puts(s, "rw-\n");
+                WARN_ON_ONCE(!ret);
+        }
+
+        cnt = simple_read_from_buffer(ubuf, count, ppos, s->buffer, s->len);
+
+        mutex_unlock(&ksym_tracer_mutex);
+
+        kfree(s);
+
+        return cnt;
+}
+
+static void __ksym_trace_reset(void)
+{
+        struct trace_ksym *entry;
+        struct hlist_node *node, *node1;
+
+        mutex_lock(&ksym_tracer_mutex);
+        hlist_for_each_entry_safe(entry, node, node1, &ksym_filter_head,
+                                                                ksym_hlist) {
+                unregister_wide_hw_breakpoint(entry->ksym_hbp);
+                ksym_filter_entry_count--;
+                hlist_del_rcu(&(entry->ksym_hlist));
+                synchronize_rcu();
+                kfree(entry);
+        }
+        mutex_unlock(&ksym_tracer_mutex);
+}
+
+static ssize_t ksym_trace_filter_write(struct file *file,
+                                        const char __user *buffer,
+                                                size_t count, loff_t *ppos)
+{
+        struct trace_ksym *entry;
+        struct hlist_node *node;
+        char *buf, *input_string, *ksymname = NULL;
+        unsigned long ksym_addr = 0;
+        int ret, op, changed = 0;
+
+        buf = kzalloc(count + 1, GFP_KERNEL);
+        if (!buf)
+                return -ENOMEM;
+
+        ret = -EFAULT;
+        if (copy_from_user(buf, buffer, count))
+                goto out;
+
+        buf[count] = '\0';
+        input_string = strstrip(buf);
+
+        /*
+         * Clear all breakpoints if:
+         * 1: echo > ksym_trace_filter
+         * 2: echo 0 > ksym_trace_filter
+         * 3: echo "*:---" > ksym_trace_filter
+         */
+        if (!buf[0] || !strcmp(buf, "0") ||
+            !strcmp(buf, "*:---")) {
+                __ksym_trace_reset();
+                ret = 0;
+                goto out;
+        }
+
+        ret = op = parse_ksym_trace_str(input_string, &ksymname, &ksym_addr);
+        if (ret < 0)
+                goto out;
+
+        mutex_lock(&ksym_tracer_mutex);
+
+        ret = -EINVAL;
+        hlist_for_each_entry(entry, node, &ksym_filter_head, ksym_hlist) {
+                if (entry->attr.bp_addr == ksym_addr) {
+                        /* Check for malformed request: (6) */
+                        if (entry->attr.bp_type != op)
+                                changed = 1;
+                        else
+                                goto out_unlock;
+                        break;
+                }
+        }
+        if (changed) {
+                unregister_wide_hw_breakpoint(entry->ksym_hbp);
+                entry->attr.bp_type = op;
+                ret = 0;
+                if (op > 0) {
+                        entry->ksym_hbp =
+                                register_wide_hw_breakpoint(&entry->attr,
+                                        ksym_hbp_handler);
+                        if (IS_ERR(entry->ksym_hbp))
+                                ret = PTR_ERR(entry->ksym_hbp);
+                        else
+                                goto out_unlock;
+                }
+                /* Error or "symbol:---" case: drop it */
+                ksym_filter_entry_count--;
+                hlist_del_rcu(&(entry->ksym_hlist));
+                synchronize_rcu();
+                kfree(entry);
+                goto out_unlock;
+        } else {
+                /* Check for malformed request: (4) */
+                if (op)
+                        ret = process_new_ksym_entry(ksymname, op, ksym_addr);
+        }
+out_unlock:
+        mutex_unlock(&ksym_tracer_mutex);
+out:
+        kfree(buf);
+        return !ret ? count : ret;
+}
+
+static const struct file_operations ksym_tracing_fops = {
+        .open           = tracing_open_generic,
+        .read           = ksym_trace_filter_read,
+        .write          = ksym_trace_filter_write,
+};
+
+static void ksym_trace_reset(struct trace_array *tr)
+{
+        ksym_tracing_enabled = 0;
+        __ksym_trace_reset();
+}
+
+static int ksym_trace_init(struct trace_array *tr)
+{
+        int cpu, ret = 0;
+
+        for_each_online_cpu(cpu)
+                tracing_reset(tr, cpu);
+        ksym_tracing_enabled = 1;
+        ksym_trace_array = tr;
+
+        return ret;
+}
+
+static void ksym_trace_print_header(struct seq_file *m)
+{
+        seq_puts(m,
+                 "#       TASK-PID   CPU#      Symbol                    "
+                 "Type    Function\n");
+        seq_puts(m,
+                 "#          |        |          |                       "
+                 " |         |\n");
+}
+
+static enum print_line_t ksym_trace_output(struct trace_iterator *iter)
+{
+        struct trace_entry *entry = iter->ent;
+        struct trace_seq *s = &iter->seq;
+        struct ksym_trace_entry *field;
+        char str[KSYM_SYMBOL_LEN];
+        int ret;
+
+        if (entry->type != TRACE_KSYM)
+                return TRACE_TYPE_UNHANDLED;
+
+        trace_assign_type(field, entry);
+
+        ret = trace_seq_printf(s, "%11s-%-5d [%03d] %pS", field->cmd,
+                                entry->pid, iter->cpu, (char *)field->addr);
+        if (!ret)
+                return TRACE_TYPE_PARTIAL_LINE;
+
+        switch (field->type) {
+        case HW_BREAKPOINT_R:
+                ret = trace_seq_printf(s, " R  ");
+                break;
+        case HW_BREAKPOINT_W:
+                ret = trace_seq_printf(s, " W  ");
+                break;
+        case HW_BREAKPOINT_R | HW_BREAKPOINT_W:
+                ret = trace_seq_printf(s, " RW ");
+                break;
+        default:
+                return TRACE_TYPE_PARTIAL_LINE;
+        }
+
+        if (!ret)
+                return TRACE_TYPE_PARTIAL_LINE;
+
+        sprint_symbol(str, field->ip);
+        ret = trace_seq_printf(s, "%s\n", str);
+        if (!ret)
+                return TRACE_TYPE_PARTIAL_LINE;
+
+        return TRACE_TYPE_HANDLED;
+}
+
+struct tracer ksym_tracer __read_mostly =
+{
+        .name           = "ksym_tracer",
+        .init           = ksym_trace_init,
+        .reset          = ksym_trace_reset,
+#ifdef CONFIG_FTRACE_SELFTEST
+        .selftest       = trace_selftest_startup_ksym,
+#endif
+        .print_header   = ksym_trace_print_header,
+        .print_line     = ksym_trace_output
+};
+
+__init static int init_ksym_trace(void)
+{
+        struct dentry *d_tracer;
+        struct dentry *entry;
+
+        d_tracer = tracing_init_dentry();
+        ksym_filter_entry_count = 0;
+
+        entry = debugfs_create_file("ksym_trace_filter", 0644, d_tracer,
+                                    NULL, &ksym_tracing_fops);
+        if (!entry)
+                pr_warning("Could not create debugfs "
+                           "'ksym_trace_filter' file\n");
+
+        return register_tracer(&ksym_tracer);
+}
+device_initcall(init_ksym_trace);
+
+
+#ifdef CONFIG_PROFILE_KSYM_TRACER
+static int ksym_tracer_stat_headers(struct seq_file *m)
+{
+        seq_puts(m, "  Access Type ");
+        seq_puts(m, "  Symbol                                       Counter\n");
+        seq_puts(m, "  ----------- ");
+        seq_puts(m, "  ------                                       -------\n");
+        return 0;
+}
+
+static int ksym_tracer_stat_show(struct seq_file *m, void *v)
+{
+        struct hlist_node *stat = v;
+        struct trace_ksym *entry;
+        int access_type = 0;
+        char fn_name[KSYM_NAME_LEN];
+
+        entry = hlist_entry(stat, struct trace_ksym, ksym_hlist);
+
+        access_type = entry->attr.bp_type;
+
+        switch (access_type) {
+        case HW_BREAKPOINT_R:
+                seq_puts(m, "  R           ");
+                break;
+        case HW_BREAKPOINT_W:
+                seq_puts(m, "  W           ");
+                break;
+        case HW_BREAKPOINT_R | HW_BREAKPOINT_W:
+                seq_puts(m, "  RW          ");
+                break;
+        default:
+                seq_puts(m, "  NA          ");
+        }
+
+        if (lookup_symbol_name(entry->attr.bp_addr, fn_name) >= 0)
+                seq_printf(m, "  %-36s", fn_name);
+        else
+                seq_printf(m, "  %-36s", "<NA>");
+        seq_printf(m, " %15lu\n", entry->counter);
+
+        return 0;
+}
+
+static void *ksym_tracer_stat_start(struct tracer_stat *trace)
+{
+        return ksym_filter_head.first;
+}
+
+static void *
+ksym_tracer_stat_next(void *v, int idx)
+{
+        struct hlist_node *stat = v;
+
+        return stat->next;
+}
+
+static struct tracer_stat ksym_tracer_stats = {
+        .name = "ksym_tracer",
+        .stat_start = ksym_tracer_stat_start,
+        .stat_next = ksym_tracer_stat_next,
+        .stat_headers = ksym_tracer_stat_headers,
+        .stat_show = ksym_tracer_stat_show
+};
+
+__init static int ksym_tracer_stat_init(void)
+{
+        int ret;
+
+        ret = register_stat_tracer(&ksym_tracer_stats);
+        if (ret) {
+                printk(KERN_WARNING "Warning: could not register "
+                                    "ksym tracer stats\n");
+                return 1;
+        }
+
+        return 0;
+}
+fs_initcall(ksym_tracer_stat_init);
+#endif /* CONFIG_PROFILE_KSYM_TRACER */
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index b6c12c6a1bcd..8e46b3323cdc 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -23,13 +23,21 @@ static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
 
 static int next_event_type = __TRACE_LAST_TYPE + 1;
 
-void trace_print_seq(struct seq_file *m, struct trace_seq *s)
+int trace_print_seq(struct seq_file *m, struct trace_seq *s)
 {
         int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len;
+        int ret;
+
+        ret = seq_write(m, s->buffer, len);
 
-        seq_write(m, s->buffer, len);
+        /*
+         * Only reset this buffer if we successfully wrote to the
+         * seq_file buffer.
+         */
+        if (!ret)
+                trace_seq_init(s);
 
-        trace_seq_init(s);
+        return ret;
 }
 
 enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter)
@@ -85,7 +93,7 @@ trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
         va_list ap;
         int ret;
 
-        if (!len)
+        if (s->full || !len)
                 return 0;
 
         va_start(ap, fmt);
@@ -93,8 +101,10 @@ trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
         va_end(ap);
 
         /* If we can't write it all, don't bother writing anything */
-        if (ret >= len)
+        if (ret >= len) {
+                s->full = 1;
                 return 0;
+        }
 
         s->len += ret;
 
@@ -119,14 +129,16 @@ trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
         int len = (PAGE_SIZE - 1) - s->len;
         int ret;
 
-        if (!len)
+        if (s->full || !len)
                 return 0;
 
         ret = vsnprintf(s->buffer + s->len, len, fmt, args);
 
         /* If we can't write it all, don't bother writing anything */
-        if (ret >= len)
+        if (ret >= len) {
+                s->full = 1;
                 return 0;
+        }
 
         s->len += ret;
 
@@ -139,14 +151,16 @@ int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
         int len = (PAGE_SIZE - 1) - s->len;
         int ret;
 
-        if (!len)
+        if (s->full || !len)
                 return 0;
 
         ret = bstr_printf(s->buffer + s->len, len, fmt, binary);
 
         /* If we can't write it all, don't bother writing anything */
-        if (ret >= len)
+        if (ret >= len) {
+                s->full = 1;
                 return 0;
+        }
 
         s->len += ret;
 
@@ -167,8 +181,13 @@ int trace_seq_puts(struct trace_seq *s, const char *str)
 {
         int len = strlen(str);
 
-        if (len > ((PAGE_SIZE - 1) - s->len))
+        if (s->full)
+                return 0;
+
+        if (len > ((PAGE_SIZE - 1) - s->len)) {
+                s->full = 1;
                 return 0;
+        }
 
         memcpy(s->buffer + s->len, str, len);
         s->len += len;
@@ -178,9 +197,14 @@ int trace_seq_puts(struct trace_seq *s, const char *str)
 
 int trace_seq_putc(struct trace_seq *s, unsigned char c)
 {
-        if (s->len >= (PAGE_SIZE - 1))
+        if (s->full)
                 return 0;
 
+        if (s->len >= (PAGE_SIZE - 1)) {
+                s->full = 1;
+                return 0;
+        }
+
         s->buffer[s->len++] = c;
 
         return 1;
@@ -188,9 +212,14 @@ int trace_seq_putc(struct trace_seq *s, unsigned char c)
 
 int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len)
 {
-        if (len > ((PAGE_SIZE - 1) - s->len))
+        if (s->full)
                 return 0;
 
+        if (len > ((PAGE_SIZE - 1) - s->len)) {
+                s->full = 1;
+                return 0;
+        }
+
         memcpy(s->buffer + s->len, mem, len);
         s->len += len;
 
@@ -203,6 +232,9 @@ int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len)
         const unsigned char *data = mem;
         int i, j;
 
+        if (s->full)
+                return 0;
+
 #ifdef __BIG_ENDIAN
         for (i = 0, j = 0; i < len; i++) {
 #else
@@ -220,8 +252,13 @@ void *trace_seq_reserve(struct trace_seq *s, size_t len)
 {
         void *ret;
 
-        if (len > ((PAGE_SIZE - 1) - s->len))
+        if (s->full)
+                return 0;
+
+        if (len > ((PAGE_SIZE - 1) - s->len)) {
+                s->full = 1;
                 return NULL;
+        }
 
         ret = s->buffer + s->len;
         s->len += len;
@@ -233,8 +270,14 @@ int trace_seq_path(struct trace_seq *s, struct path *path)
 {
         unsigned char *p;
 
-        if (s->len >= (PAGE_SIZE - 1))
+        if (s->full)
+                return 0;
+
+        if (s->len >= (PAGE_SIZE - 1)) {
+                s->full = 1;
                 return 0;
+        }
+
         p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len);
         if (!IS_ERR(p)) {
                 p = mangle_path(s->buffer + s->len, p, "\n");
@@ -247,6 +290,7 @@ int trace_seq_path(struct trace_seq *s, struct path *path)
                 return 1;
         }
 
+        s->full = 1;
         return 0;
 }
 
@@ -373,6 +417,9 @@ int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
         unsigned long vmstart = 0;
         int ret = 1;
 
+        if (s->full)
+                return 0;
+
         if (mm) {
                 const struct vm_area_struct *vma;
 
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 26185d727676..0271742abb8d 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -28,8 +28,8 @@ static int			wakeup_current_cpu;
 static unsigned                 wakeup_prio = -1;
 static int                      wakeup_rt;
 
-static raw_spinlock_t wakeup_lock =
-        (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
+static arch_spinlock_t wakeup_lock =
+        (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
 
 static void __wakeup_reset(struct trace_array *tr);
 
@@ -143,7 +143,7 @@ probe_wakeup_sched_switch(struct rq *rq, struct task_struct *prev,
                 goto out;
 
         local_irq_save(flags);
-        __raw_spin_lock(&wakeup_lock);
+        arch_spin_lock(&wakeup_lock);
 
         /* We could race with grabbing wakeup_lock */
         if (unlikely(!tracer_enabled || next != wakeup_task))
@@ -169,7 +169,7 @@ probe_wakeup_sched_switch(struct rq *rq, struct task_struct *prev,
 
 out_unlock:
         __wakeup_reset(wakeup_trace);
-        __raw_spin_unlock(&wakeup_lock);
+        arch_spin_unlock(&wakeup_lock);
         local_irq_restore(flags);
 out:
         atomic_dec(&wakeup_trace->data[cpu]->disabled);
@@ -193,9 +193,9 @@ static void wakeup_reset(struct trace_array *tr)
         tracing_reset_online_cpus(tr);
 
         local_irq_save(flags);
-        __raw_spin_lock(&wakeup_lock);
+        arch_spin_lock(&wakeup_lock);
         __wakeup_reset(tr);
-        __raw_spin_unlock(&wakeup_lock);
+        arch_spin_unlock(&wakeup_lock);
         local_irq_restore(flags);
 }
 
@@ -225,7 +225,7 @@ probe_wakeup(struct rq *rq, struct task_struct *p, int success)
                 goto out;
 
         /* interrupts should be off from try_to_wake_up */
-        __raw_spin_lock(&wakeup_lock);
+        arch_spin_lock(&wakeup_lock);
 
         /* check for races. */
         if (!tracer_enabled || p->prio >= wakeup_prio)
@@ -255,7 +255,7 @@ probe_wakeup(struct rq *rq, struct task_struct *p, int success)
         trace_function(wakeup_trace, CALLER_ADDR1, CALLER_ADDR2, flags, pc);
 
 out_locked:
-        __raw_spin_unlock(&wakeup_lock);
+        arch_spin_unlock(&wakeup_lock);
 out:
         atomic_dec(&wakeup_trace->data[cpu]->disabled);
 }
diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index d2cdbabb4ead..280fea470d67 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -17,6 +17,7 @@ static inline int trace_valid_entry(struct trace_entry *entry)
         case TRACE_GRAPH_ENT:
         case TRACE_GRAPH_RET:
         case TRACE_HW_BRANCHES:
+        case TRACE_KSYM:
                 return 1;
         }
         return 0;
@@ -66,7 +67,7 @@ static int trace_test_buffer(struct trace_array *tr, unsigned long *count)
 
         /* Don't allow flipping of max traces now */
         local_irq_save(flags);
-        __raw_spin_lock(&ftrace_max_lock);
+        arch_spin_lock(&ftrace_max_lock);
 
         cnt = ring_buffer_entries(tr->buffer);
 
@@ -84,7 +85,7 @@ static int trace_test_buffer(struct trace_array *tr, unsigned long *count)
                         break;
         }
         tracing_on();
-        __raw_spin_unlock(&ftrace_max_lock);
+        arch_spin_unlock(&ftrace_max_lock);
         local_irq_restore(flags);
 
         if (count)
@@ -808,3 +809,57 @@ trace_selftest_startup_hw_branches(struct tracer *trace,
         return ret;
 }
 #endif /* CONFIG_HW_BRANCH_TRACER */
+
+#ifdef CONFIG_KSYM_TRACER
+static int ksym_selftest_dummy;
+
+int
+trace_selftest_startup_ksym(struct tracer *trace, struct trace_array *tr)
+{
+        unsigned long count;
+        int ret;
+
+        /* start the tracing */
+        ret = tracer_init(trace, tr);
+        if (ret) {
+                warn_failed_init_tracer(trace, ret);
+                return ret;
+        }
+
+        ksym_selftest_dummy = 0;
+        /* Register the read-write tracing request */
+
+        ret = process_new_ksym_entry("ksym_selftest_dummy",
+                                     HW_BREAKPOINT_R | HW_BREAKPOINT_W,
+                                        (unsigned long)(&ksym_selftest_dummy));
+
+        if (ret < 0) {
+                printk(KERN_CONT "ksym_trace read-write startup test failed\n");
+                goto ret_path;
+        }
+        /* Perform a read and a write operation over the dummy variable to
+         * trigger the tracer
+         */
+        if (ksym_selftest_dummy == 0)
+                ksym_selftest_dummy++;
+
+        /* stop the tracing. */
+        tracing_stop();
+        /* check the trace buffer */
+        ret = trace_test_buffer(tr, &count);
+        trace->reset(tr);
+        tracing_start();
+
+        /* read & write operations - one each is performed on the dummy variable
+         * triggering two entries in the trace buffer
+         */
+        if (!ret && count != 2) {
+                printk(KERN_CONT "Ksym tracer startup test failed");
+                ret = -1;
+        }
+
+ret_path:
+        return ret;
+}
+#endif /* CONFIG_KSYM_TRACER */
+
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c
index 8504ac71e4e8..678a5120ee30 100644
--- a/kernel/trace/trace_stack.c
+++ b/kernel/trace/trace_stack.c
@@ -27,8 +27,8 @@ static struct stack_trace max_stack_trace = {
 };
 
 static unsigned long max_stack_size;
-static raw_spinlock_t max_stack_lock =
-        (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED;
+static arch_spinlock_t max_stack_lock =
+        (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
 
 static int stack_trace_disabled __read_mostly;
 static DEFINE_PER_CPU(int, trace_active);
@@ -54,7 +54,7 @@ static inline void check_stack(void)
                 return;
 
         local_irq_save(flags);
-        __raw_spin_lock(&max_stack_lock);
+        arch_spin_lock(&max_stack_lock);
 
         /* a race could have already updated it */
         if (this_size <= max_stack_size)
@@ -103,7 +103,7 @@ static inline void check_stack(void)
         }
 
  out:
-        __raw_spin_unlock(&max_stack_lock);
+        arch_spin_unlock(&max_stack_lock);
         local_irq_restore(flags);
 }
 
@@ -171,9 +171,9 @@ stack_max_size_write(struct file *filp, const char __user *ubuf,
                 return ret;
 
         local_irq_save(flags);
-        __raw_spin_lock(&max_stack_lock);
+        arch_spin_lock(&max_stack_lock);
         *ptr = val;
-        __raw_spin_unlock(&max_stack_lock);
+        arch_spin_unlock(&max_stack_lock);
         local_irq_restore(flags);
 
         return count;
@@ -207,7 +207,7 @@ t_next(struct seq_file *m, void *v, loff_t *pos)
 static void *t_start(struct seq_file *m, loff_t *pos)
 {
         local_irq_disable();
-        __raw_spin_lock(&max_stack_lock);
+        arch_spin_lock(&max_stack_lock);
 
         if (*pos == 0)
                 return SEQ_START_TOKEN;
@@ -217,7 +217,7 @@ static void *t_start(struct seq_file *m, loff_t *pos)
 
 static void t_stop(struct seq_file *m, void *p)
 {
-        __raw_spin_unlock(&max_stack_lock);
+        arch_spin_unlock(&max_stack_lock);
         local_irq_enable();
 }
 
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 527e17eae575..75289f372dd2 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -14,6 +14,43 @@ static int sys_refcount_exit;
 static DECLARE_BITMAP(enabled_enter_syscalls, NR_syscalls);
 static DECLARE_BITMAP(enabled_exit_syscalls, NR_syscalls);
 
+extern unsigned long __start_syscalls_metadata[];
+extern unsigned long __stop_syscalls_metadata[];
+
+static struct syscall_metadata **syscalls_metadata;
+
+static struct syscall_metadata *find_syscall_meta(unsigned long syscall)
+{
+        struct syscall_metadata *start;
+        struct syscall_metadata *stop;
+        char str[KSYM_SYMBOL_LEN];
+
+
+        start = (struct syscall_metadata *)__start_syscalls_metadata;
+        stop = (struct syscall_metadata *)__stop_syscalls_metadata;
+        kallsyms_lookup(syscall, NULL, NULL, NULL, str);
+
+        for ( ; start < stop; start++) {
+                /*
+                 * Only compare after the "sys" prefix. Archs that use
+                 * syscall wrappers may have syscalls symbols aliases prefixed
+                 * with "SyS" instead of "sys", leading to an unwanted
+                 * mismatch.
+                 */
+                if (start->name && !strcmp(start->name + 3, str + 3))
+                        return start;
+        }
+        return NULL;
+}
+
+static struct syscall_metadata *syscall_nr_to_meta(int nr)
+{
+        if (!syscalls_metadata || nr >= NR_syscalls || nr < 0)
+                return NULL;
+
+        return syscalls_metadata[nr];
+}
+
 enum print_line_t
 print_syscall_enter(struct trace_iterator *iter, int flags)
 {
@@ -30,7 +67,7 @@ print_syscall_enter(struct trace_iterator *iter, int flags)
         if (!entry)
                 goto end;
 
-        if (entry->enter_id != ent->type) {
+        if (entry->enter_event->id != ent->type) {
                 WARN_ON_ONCE(1);
                 goto end;
         }
@@ -85,7 +122,7 @@ print_syscall_exit(struct trace_iterator *iter, int flags)
                 return TRACE_TYPE_HANDLED;
         }
 
-        if (entry->exit_id != ent->type) {
+        if (entry->exit_event->id != ent->type) {
                 WARN_ON_ONCE(1);
                 return TRACE_TYPE_UNHANDLED;
         }
@@ -103,24 +140,19 @@ extern char *__bad_type_size(void);
 #define SYSCALL_FIELD(type, name)                                       \
         sizeof(type) != sizeof(trace.name) ?                            \
                 __bad_type_size() :                                     \
-                #type, #name, offsetof(typeof(trace), name), sizeof(trace.name)
+                #type, #name, offsetof(typeof(trace), name),            \
+                sizeof(trace.name), is_signed_type(type)
 
 int syscall_enter_format(struct ftrace_event_call *call, struct trace_seq *s)
 {
         int i;
-        int nr;
         int ret;
-        struct syscall_metadata *entry;
+        struct syscall_metadata *entry = call->data;
         struct syscall_trace_enter trace;
         int offset = offsetof(struct syscall_trace_enter, args);
 
-        nr = syscall_name_to_nr(call->data);
-        entry = syscall_nr_to_meta(nr);
-
-        if (!entry)
-                return 0;
-
-        ret = trace_seq_printf(s, "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n",
+        ret = trace_seq_printf(s, "\tfield:%s %s;\toffset:%zu;\tsize:%zu;"
+                               "\tsigned:%u;\n",
                                SYSCALL_FIELD(int, nr));
         if (!ret)
                 return 0;
@@ -130,8 +162,10 @@ int syscall_enter_format(struct ftrace_event_call *call, struct trace_seq *s)
                                         entry->args[i]);
                 if (!ret)
                         return 0;
-                ret = trace_seq_printf(s, "\toffset:%d;\tsize:%zu;\n", offset,
-                                       sizeof(unsigned long));
+                ret = trace_seq_printf(s, "\toffset:%d;\tsize:%zu;"
+                                       "\tsigned:%u;\n", offset,
+                                       sizeof(unsigned long),
+                                       is_signed_type(unsigned long));
                 if (!ret)
                         return 0;
                 offset += sizeof(unsigned long);
@@ -163,8 +197,10 @@ int syscall_exit_format(struct ftrace_event_call *call, struct trace_seq *s)
         struct syscall_trace_exit trace;
 
         ret = trace_seq_printf(s,
-                               "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
-                               "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n",
+                               "\tfield:%s %s;\toffset:%zu;\tsize:%zu;"
+                               "\tsigned:%u;\n"
+                               "\tfield:%s %s;\toffset:%zu;\tsize:%zu;"
+                               "\tsigned:%u;\n",
                                SYSCALL_FIELD(int, nr),
                                SYSCALL_FIELD(long, ret));
         if (!ret)
@@ -176,19 +212,12 @@ int syscall_exit_format(struct ftrace_event_call *call, struct trace_seq *s)
 int syscall_enter_define_fields(struct ftrace_event_call *call)
 {
         struct syscall_trace_enter trace;
-        struct syscall_metadata *meta;
+        struct syscall_metadata *meta = call->data;
         int ret;
-        int nr;
         int i;
         int offset = offsetof(typeof(trace), args);
 
-        nr = syscall_name_to_nr(call->data);
-        meta = syscall_nr_to_meta(nr);
-
-        if (!meta)
-                return 0;
-
-        ret = trace_define_common_fields(call);
+        ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
         if (ret)
                 return ret;
 
@@ -208,11 +237,11 @@ int syscall_exit_define_fields(struct ftrace_event_call *call)
         struct syscall_trace_exit trace;
         int ret;
 
-        ret = trace_define_common_fields(call);
+        ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
         if (ret)
                 return ret;
 
-        ret = trace_define_field(call, SYSCALL_FIELD(long, ret), 0,
+        ret = trace_define_field(call, SYSCALL_FIELD(long, ret),
                                  FILTER_OTHER);
 
         return ret;
@@ -239,8 +268,8 @@ void ftrace_syscall_enter(struct pt_regs *regs, long id)
 
         size = sizeof(*entry) + sizeof(unsigned long) * sys_data->nb_args;
 
-        event = trace_current_buffer_lock_reserve(&buffer, sys_data->enter_id,
-                                                  size, 0, 0);
+        event = trace_current_buffer_lock_reserve(&buffer,
+                        sys_data->enter_event->id, size, 0, 0);
         if (!event)
                 return;
 
@@ -271,8 +300,8 @@ void ftrace_syscall_exit(struct pt_regs *regs, long ret)
         if (!sys_data)
                 return;
 
-        event = trace_current_buffer_lock_reserve(&buffer, sys_data->exit_id,
-                                sizeof(*entry), 0, 0);
+        event = trace_current_buffer_lock_reserve(&buffer,
+                        sys_data->exit_event->id, sizeof(*entry), 0, 0);
         if (!event)
                 return;
 
@@ -285,23 +314,18 @@ void ftrace_syscall_exit(struct pt_regs *regs, long ret)
                 trace_current_buffer_unlock_commit(buffer, event, 0, 0);
 }
 
-int reg_event_syscall_enter(void *ptr)
+int reg_event_syscall_enter(struct ftrace_event_call *call)
 {
         int ret = 0;
         int num;
-        char *name;
 
-        name = (char *)ptr;
-        num = syscall_name_to_nr(name);
+        num = ((struct syscall_metadata *)call->data)->syscall_nr;
         if (num < 0 || num >= NR_syscalls)
                 return -ENOSYS;
         mutex_lock(&syscall_trace_lock);
         if (!sys_refcount_enter)
                 ret = register_trace_sys_enter(ftrace_syscall_enter);
-        if (ret) {
-                pr_info("event trace: Could not activate"
-                                "syscall entry trace point");
-        } else {
+        if (!ret) {
                 set_bit(num, enabled_enter_syscalls);
                 sys_refcount_enter++;
         }
@@ -309,13 +333,11 @@ int reg_event_syscall_enter(void *ptr)
         return ret;
 }
 
-void unreg_event_syscall_enter(void *ptr)
+void unreg_event_syscall_enter(struct ftrace_event_call *call)
 {
         int num;
-        char *name;
 
-        name = (char *)ptr;
-        num = syscall_name_to_nr(name);
+        num = ((struct syscall_metadata *)call->data)->syscall_nr;
         if (num < 0 || num >= NR_syscalls)
                 return;
         mutex_lock(&syscall_trace_lock);
@@ -326,23 +348,18 @@ void unreg_event_syscall_enter(void *ptr)
         mutex_unlock(&syscall_trace_lock);
 }
 
-int reg_event_syscall_exit(void *ptr)
+int reg_event_syscall_exit(struct ftrace_event_call *call)
 {
         int ret = 0;
         int num;
-        char *name;
 
-        name = (char *)ptr;
-        num = syscall_name_to_nr(name);
+        num = ((struct syscall_metadata *)call->data)->syscall_nr;
         if (num < 0 || num >= NR_syscalls)
                 return -ENOSYS;
         mutex_lock(&syscall_trace_lock);
         if (!sys_refcount_exit)
                 ret = register_trace_sys_exit(ftrace_syscall_exit);
-        if (ret) {
-                pr_info("event trace: Could not activate"
-                                "syscall exit trace point");
-        } else {
+        if (!ret) {
                 set_bit(num, enabled_exit_syscalls);
                 sys_refcount_exit++;
         }
@@ -350,13 +367,11 @@ int reg_event_syscall_exit(void *ptr)
         return ret;
 }
 
-void unreg_event_syscall_exit(void *ptr)
+void unreg_event_syscall_exit(struct ftrace_event_call *call)
 {
         int num;
-        char *name;
 
-        name = (char *)ptr;
-        num = syscall_name_to_nr(name);
+        num = ((struct syscall_metadata *)call->data)->syscall_nr;
         if (num < 0 || num >= NR_syscalls)
                 return;
         mutex_lock(&syscall_trace_lock);
@@ -367,13 +382,44 @@ void unreg_event_syscall_exit(void *ptr)
         mutex_unlock(&syscall_trace_lock);
 }
 
-struct trace_event event_syscall_enter = {
-        .trace                  = print_syscall_enter,
-};
+int init_syscall_trace(struct ftrace_event_call *call)
+{
+        int id;
+
+        id = register_ftrace_event(call->event);
+        if (!id)
+                return -ENODEV;
+        call->id = id;
+        INIT_LIST_HEAD(&call->fields);
+        return 0;
+}
+
+int __init init_ftrace_syscalls(void)
+{
+        struct syscall_metadata *meta;
+        unsigned long addr;
+        int i;
+
+        syscalls_metadata = kzalloc(sizeof(*syscalls_metadata) *
+                                        NR_syscalls, GFP_KERNEL);
+        if (!syscalls_metadata) {
+                WARN_ON(1);
+                return -ENOMEM;
+        }
+
+        for (i = 0; i < NR_syscalls; i++) {
+                addr = arch_syscall_addr(i);
+                meta = find_syscall_meta(addr);
+                if (!meta)
+                        continue;
+
+                meta->syscall_nr = i;
+                syscalls_metadata[i] = meta;
+        }
 
-struct trace_event event_syscall_exit = {
-        .trace                  = print_syscall_exit,
-};
+        return 0;
+}
+core_initcall(init_ftrace_syscalls);
 
 #ifdef CONFIG_EVENT_PROFILE
 
@@ -387,8 +433,10 @@ static void prof_syscall_enter(struct pt_regs *regs, long id)
         struct syscall_metadata *sys_data;
         struct syscall_trace_enter *rec;
         unsigned long flags;
+        char *trace_buf;
         char *raw_data;
         int syscall_nr;
+        int rctx;
         int size;
         int cpu;
 
@@ -412,41 +460,42 @@ static void prof_syscall_enter(struct pt_regs *regs, long id)
         /* Protect the per cpu buffer, begin the rcu read side */
         local_irq_save(flags);
 
+        rctx = perf_swevent_get_recursion_context();
+        if (rctx < 0)
+                goto end_recursion;
+
         cpu = smp_processor_id();
 
-        if (in_nmi())
-                raw_data = rcu_dereference(trace_profile_buf_nmi);
-        else
-                raw_data = rcu_dereference(trace_profile_buf);
+        trace_buf = rcu_dereference(perf_trace_buf);
 
-        if (!raw_data)
+        if (!trace_buf)
                 goto end;
 
-        raw_data = per_cpu_ptr(raw_data, cpu);
+        raw_data = per_cpu_ptr(trace_buf, cpu);
 
         /* zero the dead bytes from align to not leak stack to user */
         *(u64 *)(&raw_data[size - sizeof(u64)]) = 0ULL;
 
         rec = (struct syscall_trace_enter *) raw_data;
         tracing_generic_entry_update(&rec->ent, 0, 0);
-        rec->ent.type = sys_data->enter_id;
+        rec->ent.type = sys_data->enter_event->id;
         rec->nr = syscall_nr;
         syscall_get_arguments(current, regs, 0, sys_data->nb_args,
                                (unsigned long *)&rec->args);
-        perf_tp_event(sys_data->enter_id, 0, 1, rec, size);
+        perf_tp_event(sys_data->enter_event->id, 0, 1, rec, size);
 
 end:
+        perf_swevent_put_recursion_context(rctx);
+end_recursion:
         local_irq_restore(flags);
 }
 
-int reg_prof_syscall_enter(char *name)
+int prof_sysenter_enable(struct ftrace_event_call *call)
 {
         int ret = 0;
         int num;
 
-        num = syscall_name_to_nr(name);
-        if (num < 0 || num >= NR_syscalls)
-                return -ENOSYS;
+        num = ((struct syscall_metadata *)call->data)->syscall_nr;
 
         mutex_lock(&syscall_trace_lock);
         if (!sys_prof_refcount_enter)
@@ -462,13 +511,11 @@ int reg_prof_syscall_enter(char *name)
         return ret;
 }
 
-void unreg_prof_syscall_enter(char *name)
+void prof_sysenter_disable(struct ftrace_event_call *call)
 {
         int num;
 
-        num = syscall_name_to_nr(name);
-        if (num < 0 || num >= NR_syscalls)
-                return;
+        num = ((struct syscall_metadata *)call->data)->syscall_nr;
 
         mutex_lock(&syscall_trace_lock);
         sys_prof_refcount_enter--;
@@ -484,7 +531,9 @@ static void prof_syscall_exit(struct pt_regs *regs, long ret)
         struct syscall_trace_exit *rec;
         unsigned long flags;
         int syscall_nr;
+        char *trace_buf;
         char *raw_data;
+        int rctx;
         int size;
         int cpu;
 
@@ -510,17 +559,19 @@ static void prof_syscall_exit(struct pt_regs *regs, long ret)
 
         /* Protect the per cpu buffer, begin the rcu read side */
         local_irq_save(flags);
+
+        rctx = perf_swevent_get_recursion_context();
+        if (rctx < 0)
+                goto end_recursion;
+
         cpu = smp_processor_id();
 
-        if (in_nmi())
-                raw_data = rcu_dereference(trace_profile_buf_nmi);
-        else
-                raw_data = rcu_dereference(trace_profile_buf);
+        trace_buf = rcu_dereference(perf_trace_buf);
 
-        if (!raw_data)
+        if (!trace_buf)
                 goto end;
 
-        raw_data = per_cpu_ptr(raw_data, cpu);
+        raw_data = per_cpu_ptr(trace_buf, cpu);
 
         /* zero the dead bytes from align to not leak stack to user */
         *(u64 *)(&raw_data[size - sizeof(u64)]) = 0ULL;
@@ -528,24 +579,24 @@ static void prof_syscall_exit(struct pt_regs *regs, long ret)
         rec = (struct syscall_trace_exit *)raw_data;
 
         tracing_generic_entry_update(&rec->ent, 0, 0);
-        rec->ent.type = sys_data->exit_id;
+        rec->ent.type = sys_data->exit_event->id;
         rec->nr = syscall_nr;
         rec->ret = syscall_get_return_value(current, regs);
 
-        perf_tp_event(sys_data->exit_id, 0, 1, rec, size);
+        perf_tp_event(sys_data->exit_event->id, 0, 1, rec, size);
 
 end:
+        perf_swevent_put_recursion_context(rctx);
+end_recursion:
         local_irq_restore(flags);
 }
 
-int reg_prof_syscall_exit(char *name)
+int prof_sysexit_enable(struct ftrace_event_call *call)
 {
         int ret = 0;
         int num;
 
-        num = syscall_name_to_nr(name);
-        if (num < 0 || num >= NR_syscalls)
-                return -ENOSYS;
+        num = ((struct syscall_metadata *)call->data)->syscall_nr;
 
         mutex_lock(&syscall_trace_lock);
         if (!sys_prof_refcount_exit)
@@ -561,13 +612,11 @@ int reg_prof_syscall_exit(char *name)
         return ret;
 }
 
-void unreg_prof_syscall_exit(char *name)
+void prof_sysexit_disable(struct ftrace_event_call *call)
 {
         int num;
 
-        num = syscall_name_to_nr(name);
-        if (num < 0 || num >= NR_syscalls)
-                return;
+        num = ((struct syscall_metadata *)call->data)->syscall_nr;
 
         mutex_lock(&syscall_trace_lock);
         sys_prof_refcount_exit--;
diff --git a/kernel/user-return-notifier.c b/kernel/user-return-notifier.c
new file mode 100644
index 000000000000..eb27fd3430a2
--- /dev/null
+++ b/kernel/user-return-notifier.c
@@ -0,0 +1,44 @@
+
+#include <linux/user-return-notifier.h>
+#include <linux/percpu.h>
+#include <linux/sched.h>
+#include <linux/module.h>
+
+static DEFINE_PER_CPU(struct hlist_head, return_notifier_list);
+
+/*
+ * Request a notification when the current cpu returns to userspace.  Must be
+ * called in atomic context.  The notifier will also be called in atomic
+ * context.
+ */
+void user_return_notifier_register(struct user_return_notifier *urn)
+{
+        set_tsk_thread_flag(current, TIF_USER_RETURN_NOTIFY);
+        hlist_add_head(&urn->link, &__get_cpu_var(return_notifier_list));
+}
+EXPORT_SYMBOL_GPL(user_return_notifier_register);
+
+/*
+ * Removes a registered user return notifier.  Must be called from atomic
+ * context, and from the same cpu registration occured in.
+ */
+void user_return_notifier_unregister(struct user_return_notifier *urn)
+{
+        hlist_del(&urn->link);
+        if (hlist_empty(&__get_cpu_var(return_notifier_list)))
+                clear_tsk_thread_flag(current, TIF_USER_RETURN_NOTIFY);
+}
+EXPORT_SYMBOL_GPL(user_return_notifier_unregister);
+
+/* Calls registered user return notifiers */
+void fire_user_return_notifiers(void)
+{
+        struct user_return_notifier *urn;
+        struct hlist_node *tmp1, *tmp2;
+        struct hlist_head *head;
+
+        head = &get_cpu_var(return_notifier_list);
+        hlist_for_each_entry_safe(urn, tmp1, tmp2, head, link)
+                urn->on_user_return(urn);
+        put_cpu_var(return_notifier_list);
+}
diff --git a/kernel/utsname_sysctl.c b/kernel/utsname_sysctl.c
index 69eae358a726..a2cd77e70d4d 100644
--- a/kernel/utsname_sysctl.c
+++ b/kernel/utsname_sysctl.c
@@ -57,78 +57,47 @@ static int proc_do_uts_string(ctl_table *table, int write,
 #define proc_do_uts_string NULL
 #endif
 
-
-#ifdef CONFIG_SYSCTL_SYSCALL
-/* The generic string strategy routine: */
-static int sysctl_uts_string(ctl_table *table,
-                  void __user *oldval, size_t __user *oldlenp,
-                  void __user *newval, size_t newlen)
-{
-        struct ctl_table uts_table;
-        int r, write;
-        write = newval && newlen;
-        memcpy(&uts_table, table, sizeof(uts_table));
-        uts_table.data = get_uts(table, write);
-        r = sysctl_string(&uts_table, oldval, oldlenp, newval, newlen);
-        put_uts(table, write, uts_table.data);
-        return r;
-}
-#else
-#define sysctl_uts_string NULL
-#endif
-
 static struct ctl_table uts_kern_table[] = {
         {
-                .ctl_name       = KERN_OSTYPE,
                 .procname       = "ostype",
                 .data           = init_uts_ns.name.sysname,
                 .maxlen         = sizeof(init_uts_ns.name.sysname),
                 .mode           = 0444,
                 .proc_handler   = proc_do_uts_string,
-                .strategy       = sysctl_uts_string,
         },
         {
-                .ctl_name       = KERN_OSRELEASE,
                 .procname       = "osrelease",
                 .data           = init_uts_ns.name.release,
                 .maxlen         = sizeof(init_uts_ns.name.release),
                 .mode           = 0444,
                 .proc_handler   = proc_do_uts_string,
-                .strategy       = sysctl_uts_string,
         },
         {
-                .ctl_name       = KERN_VERSION,
                 .procname       = "version",
                 .data           = init_uts_ns.name.version,
                 .maxlen         = sizeof(init_uts_ns.name.version),
                 .mode           = 0444,
                 .proc_handler   = proc_do_uts_string,
-                .strategy       = sysctl_uts_string,
         },
         {
-                .ctl_name       = KERN_NODENAME,
                 .procname       = "hostname",
                 .data           = init_uts_ns.name.nodename,
                 .maxlen         = sizeof(init_uts_ns.name.nodename),
                 .mode           = 0644,
                 .proc_handler   = proc_do_uts_string,
-                .strategy       = sysctl_uts_string,
         },
         {
-                .ctl_name       = KERN_DOMAINNAME,
                 .procname       = "domainname",
                 .data           = init_uts_ns.name.domainname,
                 .maxlen         = sizeof(init_uts_ns.name.domainname),
                 .mode           = 0644,
                 .proc_handler   = proc_do_uts_string,
-                .strategy       = sysctl_uts_string,
         },
         {}
 };
 
 static struct ctl_table uts_root_table[] = {
         {
-                .ctl_name       = CTL_KERN,
                 .procname       = "kernel",
                 .mode           = 0555,
                 .child          = uts_kern_table,
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 67e526b6ae81..dee48658805c 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -68,6 +68,116 @@ struct workqueue_struct {
 #endif
 };
 
+#ifdef CONFIG_DEBUG_OBJECTS_WORK
+
+static struct debug_obj_descr work_debug_descr;
+
+/*
+ * fixup_init is called when:
+ * - an active object is initialized
+ */
+static int work_fixup_init(void *addr, enum debug_obj_state state)
+{
+        struct work_struct *work = addr;
+
+        switch (state) {
+        case ODEBUG_STATE_ACTIVE:
+                cancel_work_sync(work);
+                debug_object_init(work, &work_debug_descr);
+                return 1;
+        default:
+                return 0;
+        }
+}
+
+/*
+ * fixup_activate is called when:
+ * - an active object is activated
+ * - an unknown object is activated (might be a statically initialized object)
+ */
+static int work_fixup_activate(void *addr, enum debug_obj_state state)
+{
+        struct work_struct *work = addr;
+
+        switch (state) {
+
+        case ODEBUG_STATE_NOTAVAILABLE:
+                /*
+                 * This is not really a fixup. The work struct was
+                 * statically initialized. We just make sure that it
+                 * is tracked in the object tracker.
+                 */
+                if (test_bit(WORK_STRUCT_STATIC, work_data_bits(work))) {
+                        debug_object_init(work, &work_debug_descr);
+                        debug_object_activate(work, &work_debug_descr);
+                        return 0;
+                }
+                WARN_ON_ONCE(1);
+                return 0;
+
+        case ODEBUG_STATE_ACTIVE:
+                WARN_ON(1);
+
+        default:
+                return 0;
+        }
+}
+
+/*
+ * fixup_free is called when:
+ * - an active object is freed
+ */
+static int work_fixup_free(void *addr, enum debug_obj_state state)
+{
+        struct work_struct *work = addr;
+
+        switch (state) {
+        case ODEBUG_STATE_ACTIVE:
+                cancel_work_sync(work);
+                debug_object_free(work, &work_debug_descr);
+                return 1;
+        default:
+                return 0;
+        }
+}
+
+static struct debug_obj_descr work_debug_descr = {
+        .name           = "work_struct",
+        .fixup_init     = work_fixup_init,
+        .fixup_activate = work_fixup_activate,
+        .fixup_free     = work_fixup_free,
+};
+
+static inline void debug_work_activate(struct work_struct *work)
+{
+        debug_object_activate(work, &work_debug_descr);
+}
+
+static inline void debug_work_deactivate(struct work_struct *work)
+{
+        debug_object_deactivate(work, &work_debug_descr);
+}
+
+void __init_work(struct work_struct *work, int onstack)
+{
+        if (onstack)
+                debug_object_init_on_stack(work, &work_debug_descr);
+        else
+                debug_object_init(work, &work_debug_descr);
+}
+EXPORT_SYMBOL_GPL(__init_work);
+
+void destroy_work_on_stack(struct work_struct *work)
+{
+        debug_object_free(work, &work_debug_descr);
+}
+EXPORT_SYMBOL_GPL(destroy_work_on_stack);
+
+#else
+static inline void debug_work_activate(struct work_struct *work) { }
+static inline void debug_work_deactivate(struct work_struct *work) { }
+#endif
+
 /* Serializes the accesses to the list of workqueues. */
 static DEFINE_SPINLOCK(workqueue_lock);
 static LIST_HEAD(workqueues);
@@ -145,6 +255,7 @@ static void __queue_work(struct cpu_workqueue_struct *cwq,
 {
         unsigned long flags;
 
+        debug_work_activate(work);
         spin_lock_irqsave(&cwq->lock, flags);
         insert_work(cwq, work, &cwq->worklist);
         spin_unlock_irqrestore(&cwq->lock, flags);
@@ -280,6 +391,7 @@ static void run_workqueue(struct cpu_workqueue_struct *cwq)
                 struct lockdep_map lockdep_map = work->lockdep_map;
 #endif
                 trace_workqueue_execution(cwq->thread, work);
+                debug_work_deactivate(work);
                 cwq->current_work = work;
                 list_del_init(cwq->worklist.next);
                 spin_unlock_irq(&cwq->lock);
@@ -350,11 +462,18 @@ static void wq_barrier_func(struct work_struct *work)
 static void insert_wq_barrier(struct cpu_workqueue_struct *cwq,
                         struct wq_barrier *barr, struct list_head *head)
 {
-        INIT_WORK(&barr->work, wq_barrier_func);
+        /*
+         * debugobject calls are safe here even with cwq->lock locked
+         * as we know for sure that this will not trigger any of the
+         * checks and call back into the fixup functions where we
+         * might deadlock.
+         */
+        INIT_WORK_ON_STACK(&barr->work, wq_barrier_func);
         __set_bit(WORK_STRUCT_PENDING, work_data_bits(&barr->work));
 
         init_completion(&barr->done);
 
+        debug_work_activate(&barr->work);
         insert_work(cwq, &barr->work, head);
 }
 
@@ -372,8 +491,10 @@ static int flush_cpu_workqueue(struct cpu_workqueue_struct *cwq)
         }
         spin_unlock_irq(&cwq->lock);
 
-        if (active)
+        if (active) {
                 wait_for_completion(&barr.done);
+                destroy_work_on_stack(&barr.work);
+        }
 
         return active;
 }
@@ -451,6 +572,7 @@ out:
                 return 0;
 
         wait_for_completion(&barr.done);
+        destroy_work_on_stack(&barr.work);
         return 1;
 }
 EXPORT_SYMBOL_GPL(flush_work);
@@ -485,6 +607,7 @@ static int try_to_grab_pending(struct work_struct *work)
                  */
                 smp_rmb();
                 if (cwq == get_wq_data(work)) {
+                        debug_work_deactivate(work);
                         list_del_init(&work->entry);
                         ret = 1;
                 }
@@ -507,8 +630,10 @@ static void wait_on_cpu_work(struct cpu_workqueue_struct *cwq,
         }
         spin_unlock_irq(&cwq->lock);
 
-        if (unlikely(running))
+        if (unlikely(running)) {
                 wait_for_completion(&barr.done);
+                destroy_work_on_stack(&barr.work);
+        }
 }
 
 static void wait_on_work(struct work_struct *work)