Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6

39 files changed, 1085 insertions, 390 deletions

diff --git a/kernel/Makefile b/kernel/Makefile
index e1c5bf3365c0..2921d90ce32f 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -9,7 +9,8 @@ obj-y     = sched.o fork.o exec_domain.o panic.o printk.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 \
             hrtimer.o rwsem.o nsproxy.o srcu.o semaphore.o \
-            notifier.o ksysfs.o pm_qos_params.o sched_clock.o cred.o
+            notifier.o ksysfs.o pm_qos_params.o sched_clock.o cred.o \
+            async.o
 
 ifdef CONFIG_FUNCTION_TRACER
 # Do not trace debug files and internal ftrace files
diff --git a/kernel/async.c b/kernel/async.c
new file mode 100644
index 000000000000..97373380c9e7
--- /dev/null
+++ b/kernel/async.c
@@ -0,0 +1,321 @@
+/*
+ * async.c: Asynchronous function calls for boot performance
+ *
+ * (C) Copyright 2009 Intel Corporation
+ * Author: Arjan van de Ven <arjan@linux.intel.com>
+ *
+ * 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; version 2
+ * of the License.
+ */
+
+
+/*
+
+Goals and Theory of Operation
+
+The primary goal of this feature is to reduce the kernel boot time,
+by doing various independent hardware delays and discovery operations
+decoupled and not strictly serialized.
+
+More specifically, the asynchronous function call concept allows
+certain operations (primarily during system boot) to happen
+asynchronously, out of order, while these operations still
+have their externally visible parts happen sequentially and in-order.
+(not unlike how out-of-order CPUs retire their instructions in order)
+
+Key to the asynchronous function call implementation is the concept of
+a "sequence cookie" (which, although it has an abstracted type, can be
+thought of as a monotonically incrementing number).
+
+The async core will assign each scheduled event such a sequence cookie and
+pass this to the called functions.
+
+The asynchronously called function should before doing a globally visible
+operation, such as registering device numbers, call the
+async_synchronize_cookie() function and pass in its own cookie. The
+async_synchronize_cookie() function will make sure that all asynchronous
+operations that were scheduled prior to the operation corresponding with the
+cookie have completed.
+
+Subsystem/driver initialization code that scheduled asynchronous probe
+functions, but which shares global resources with other drivers/subsystems
+that do not use the asynchronous call feature, need to do a full
+synchronization with the async_synchronize_full() function, before returning
+from their init function. This is to maintain strict ordering between the
+asynchronous and synchronous parts of the kernel.
+
+*/
+
+#include <linux/async.h>
+#include <linux/module.h>
+#include <linux/wait.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/kthread.h>
+#include <asm/atomic.h>
+
+static async_cookie_t next_cookie = 1;
+
+#define MAX_THREADS     256
+#define MAX_WORK        32768
+
+static LIST_HEAD(async_pending);
+static LIST_HEAD(async_running);
+static DEFINE_SPINLOCK(async_lock);
+
+struct async_entry {
+        struct list_head list;
+        async_cookie_t   cookie;
+        async_func_ptr   *func;
+        void             *data;
+        struct list_head *running;
+};
+
+static DECLARE_WAIT_QUEUE_HEAD(async_done);
+static DECLARE_WAIT_QUEUE_HEAD(async_new);
+
+static atomic_t entry_count;
+static atomic_t thread_count;
+
+extern int initcall_debug;
+
+
+/*
+ * MUST be called with the lock held!
+ */
+static async_cookie_t  __lowest_in_progress(struct list_head *running)
+{
+        struct async_entry *entry;
+        if (!list_empty(&async_pending)) {
+                entry = list_first_entry(&async_pending,
+                        struct async_entry, list);
+                return entry->cookie;
+        } else if (!list_empty(running)) {
+                entry = list_first_entry(running,
+                        struct async_entry, list);
+                return entry->cookie;
+        } else {
+                /* nothing in progress... next_cookie is "infinity" */
+                return next_cookie;
+        }
+
+}
+/*
+ * pick the first pending entry and run it
+ */
+static void run_one_entry(void)
+{
+        unsigned long flags;
+        struct async_entry *entry;
+        ktime_t calltime, delta, rettime;
+
+        /* 1) pick one task from the pending queue */
+
+        spin_lock_irqsave(&async_lock, flags);
+        if (list_empty(&async_pending))
+                goto out;
+        entry = list_first_entry(&async_pending, struct async_entry, list);
+
+        /* 2) move it to the running queue */
+        list_del(&entry->list);
+        list_add_tail(&entry->list, &async_running);
+        spin_unlock_irqrestore(&async_lock, flags);
+
+        /* 3) run it (and print duration)*/
+        if (initcall_debug && system_state == SYSTEM_BOOTING) {
+                printk("calling  %lli_%pF @ %i\n", entry->cookie, entry->func, task_pid_nr(current));
+                calltime = ktime_get();
+        }
+        entry->func(entry->data, entry->cookie);
+        if (initcall_debug && system_state == SYSTEM_BOOTING) {
+                rettime = ktime_get();
+                delta = ktime_sub(rettime, calltime);
+                printk("initcall %lli_%pF returned 0 after %lld usecs\n", entry->cookie,
+                        entry->func, ktime_to_ns(delta) >> 10);
+        }
+
+        /* 4) remove it from the running queue */
+        spin_lock_irqsave(&async_lock, flags);
+        list_del(&entry->list);
+
+        /* 5) free the entry  */
+        kfree(entry);
+        atomic_dec(&entry_count);
+
+        spin_unlock_irqrestore(&async_lock, flags);
+
+        /* 6) wake up any waiters. */
+        wake_up(&async_done);
+        return;
+
+out:
+        spin_unlock_irqrestore(&async_lock, flags);
+}
+
+
+static async_cookie_t __async_schedule(async_func_ptr *ptr, void *data, struct list_head *running)
+{
+        struct async_entry *entry;
+        unsigned long flags;
+        async_cookie_t newcookie;
+        
+
+        /* allow irq-off callers */
+        entry = kzalloc(sizeof(struct async_entry), GFP_ATOMIC);
+
+        /*
+         * If we're out of memory or if there's too much work
+         * pending already, we execute synchronously.
+         */
+        if (!entry || atomic_read(&entry_count) > MAX_WORK) {
+                kfree(entry);
+                spin_lock_irqsave(&async_lock, flags);
+                newcookie = next_cookie++;
+                spin_unlock_irqrestore(&async_lock, flags);
+
+                /* low on memory.. run synchronously */
+                ptr(data, newcookie);
+                return newcookie;
+        }
+        entry->func = ptr;
+        entry->data = data;
+        entry->running = running;
+
+        spin_lock_irqsave(&async_lock, flags);
+        newcookie = entry->cookie = next_cookie++;
+        list_add_tail(&entry->list, &async_pending);
+        atomic_inc(&entry_count);
+        spin_unlock_irqrestore(&async_lock, flags);
+        wake_up(&async_new);
+        return newcookie;
+}
+
+async_cookie_t async_schedule(async_func_ptr *ptr, void *data)
+{
+        return __async_schedule(ptr, data, &async_pending);
+}
+EXPORT_SYMBOL_GPL(async_schedule);
+
+async_cookie_t async_schedule_special(async_func_ptr *ptr, void *data, struct list_head *running)
+{
+        return __async_schedule(ptr, data, running);
+}
+EXPORT_SYMBOL_GPL(async_schedule_special);
+
+void async_synchronize_full(void)
+{
+        async_synchronize_cookie(next_cookie);
+}
+EXPORT_SYMBOL_GPL(async_synchronize_full);
+
+void async_synchronize_full_special(struct list_head *list)
+{
+        async_synchronize_cookie_special(next_cookie, list);
+}
+EXPORT_SYMBOL_GPL(async_synchronize_full_special);
+
+void async_synchronize_cookie_special(async_cookie_t cookie, struct list_head *running)
+{
+        ktime_t starttime, delta, endtime;
+
+        if (initcall_debug && system_state == SYSTEM_BOOTING) {
+                printk("async_waiting @ %i\n", task_pid_nr(current));
+                starttime = ktime_get();
+        }
+
+        wait_event(async_done, __lowest_in_progress(running) >= cookie);
+
+        if (initcall_debug && system_state == SYSTEM_BOOTING) {
+                endtime = ktime_get();
+                delta = ktime_sub(endtime, starttime);
+
+                printk("async_continuing @ %i after %lli usec\n",
+                        task_pid_nr(current), ktime_to_ns(delta) >> 10);
+        }
+}
+EXPORT_SYMBOL_GPL(async_synchronize_cookie_special);
+
+void async_synchronize_cookie(async_cookie_t cookie)
+{
+        async_synchronize_cookie_special(cookie, &async_running);
+}
+EXPORT_SYMBOL_GPL(async_synchronize_cookie);
+
+
+static int async_thread(void *unused)
+{
+        DECLARE_WAITQUEUE(wq, current);
+        add_wait_queue(&async_new, &wq);
+
+        while (!kthread_should_stop()) {
+                int ret = HZ;
+                set_current_state(TASK_INTERRUPTIBLE);
+                /*
+                 * check the list head without lock.. false positives
+                 * are dealt with inside run_one_entry() while holding
+                 * the lock.
+                 */
+                rmb();
+                if (!list_empty(&async_pending))
+                        run_one_entry();
+                else
+                        ret = schedule_timeout(HZ);
+
+                if (ret == 0) {
+                        /*
+                         * we timed out, this means we as thread are redundant.
+                         * we sign off and die, but we to avoid any races there
+                         * is a last-straw check to see if work snuck in.
+                         */
+                        atomic_dec(&thread_count);
+                        wmb(); /* manager must see our departure first */
+                        if (list_empty(&async_pending))
+                                break;
+                        /*
+                         * woops work came in between us timing out and us
+                         * signing off; we need to stay alive and keep working.
+                         */
+                        atomic_inc(&thread_count);
+                }
+        }
+        remove_wait_queue(&async_new, &wq);
+
+        return 0;
+}
+
+static int async_manager_thread(void *unused)
+{
+        DECLARE_WAITQUEUE(wq, current);
+        add_wait_queue(&async_new, &wq);
+
+        while (!kthread_should_stop()) {
+                int tc, ec;
+
+                set_current_state(TASK_INTERRUPTIBLE);
+
+                tc = atomic_read(&thread_count);
+                rmb();
+                ec = atomic_read(&entry_count);
+
+                while (tc < ec && tc < MAX_THREADS) {
+                        kthread_run(async_thread, NULL, "async/%i", tc);
+                        atomic_inc(&thread_count);
+                        tc++;
+                }
+
+                schedule();
+        }
+        remove_wait_queue(&async_new, &wq);
+
+        return 0;
+}
+
+static int __init async_init(void)
+{
+        kthread_run(async_manager_thread, NULL, "async/mgr");
+        return 0;
+}
+
+core_initcall(async_init);
diff --git a/kernel/capability.c b/kernel/capability.c
index c598d9d5be4f..688926e496be 100644
--- a/kernel/capability.c
+++ b/kernel/capability.c
@@ -306,7 +306,7 @@ int capable(int cap)
                 BUG();
         }
 
-        if (has_capability(current, cap)) {
+        if (security_capable(cap) == 0) {
                 current->flags |= PF_SUPERPRIV;
                 return 1;
         }
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 87bb0258fd27..f221446aa02d 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -116,7 +116,6 @@ static int root_count;
  * be called.
  */
 static int need_forkexit_callback __read_mostly;
-static int need_mm_owner_callback __read_mostly;
 
 /* convenient tests for these bits */
 inline int cgroup_is_removed(const struct cgroup *cgrp)
@@ -2539,7 +2538,6 @@ static void __init cgroup_init_subsys(struct cgroup_subsys *ss)
         init_css_set.subsys[ss->subsys_id] = dummytop->subsys[ss->subsys_id];
 
         need_forkexit_callback |= ss->fork || ss->exit;
-        need_mm_owner_callback |= !!ss->mm_owner_changed;
 
         /* At system boot, before all subsystems have been
          * registered, no tasks have been forked, so we don't
@@ -2789,37 +2787,6 @@ void cgroup_fork_callbacks(struct task_struct *child)
         }
 }
 
-#ifdef CONFIG_MM_OWNER
-/**
- * cgroup_mm_owner_callbacks - run callbacks when the mm->owner changes
- * @p: the new owner
- *
- * Called on every change to mm->owner. mm_init_owner() does not
- * invoke this routine, since it assigns the mm->owner the first time
- * and does not change it.
- *
- * The callbacks are invoked with mmap_sem held in read mode.
- */
-void cgroup_mm_owner_callbacks(struct task_struct *old, struct task_struct *new)
-{
-        struct cgroup *oldcgrp, *newcgrp = NULL;
-
-        if (need_mm_owner_callback) {
-                int i;
-                for (i = 0; i < CGROUP_SUBSYS_COUNT; i++) {
-                        struct cgroup_subsys *ss = subsys[i];
-                        oldcgrp = task_cgroup(old, ss->subsys_id);
-                        if (new)
-                                newcgrp = task_cgroup(new, ss->subsys_id);
-                        if (oldcgrp == newcgrp)
-                                continue;
-                        if (ss->mm_owner_changed)
-                                ss->mm_owner_changed(ss, oldcgrp, newcgrp, new);
-                }
-        }
-}
-#endif /* CONFIG_MM_OWNER */
-
 /**
  * cgroup_post_fork - called on a new task after adding it to the task list
  * @child: the task in question
diff --git a/kernel/compat.c b/kernel/compat.c
index d52e2ec1deb5..42d56544460f 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -24,6 +24,7 @@
 #include <linux/migrate.h>
 #include <linux/posix-timers.h>
 #include <linux/times.h>
+#include <linux/ptrace.h>
 
 #include <asm/uaccess.h>
 
@@ -229,6 +230,7 @@ asmlinkage long compat_sys_times(struct compat_tms __user *tbuf)
                 if (copy_to_user(tbuf, &tmp, sizeof(tmp)))
                         return -EFAULT;
         }
+        force_successful_syscall_return();
         return compat_jiffies_to_clock_t(jiffies);
 }
 
@@ -894,8 +896,9 @@ asmlinkage long compat_sys_time(compat_time_t __user * tloc)
 
         if (tloc) {
                 if (put_user(i,tloc))
-                        i = -EFAULT;
+                        return -EFAULT;
         }
+        force_successful_syscall_return();
         return i;
 }
 
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 30e74dd6d01b..79e40f00dcb8 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -379,8 +379,11 @@ static cpumask_var_t frozen_cpus;
 
 int disable_nonboot_cpus(void)
 {
-        int cpu, first_cpu, error = 0;
+        int cpu, first_cpu, error;
 
+        error = stop_machine_create();
+        if (error)
+                return error;
         cpu_maps_update_begin();
         first_cpu = cpumask_first(cpu_online_mask);
         /* We take down all of the non-boot CPUs in one shot to avoid races
@@ -409,6 +412,7 @@ int disable_nonboot_cpus(void)
                 printk(KERN_ERR "Non-boot CPUs are not disabled\n");
         }
         cpu_maps_update_done();
+        stop_machine_destroy();
         return error;
 }
 
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 39c1a4c1c5a9..345ace5117de 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -240,6 +240,17 @@ static struct cpuset top_cpuset = {
 static DEFINE_MUTEX(callback_mutex);
 
 /*
+ * cpuset_buffer_lock protects both the cpuset_name and cpuset_nodelist
+ * buffers.  They are statically allocated to prevent using excess stack
+ * when calling cpuset_print_task_mems_allowed().
+ */
+#define CPUSET_NAME_LEN         (128)
+#define CPUSET_NODELIST_LEN     (256)
+static char cpuset_name[CPUSET_NAME_LEN];
+static char cpuset_nodelist[CPUSET_NODELIST_LEN];
+static DEFINE_SPINLOCK(cpuset_buffer_lock);
+
+/*
  * This is ugly, but preserves the userspace API for existing cpuset
  * users. If someone tries to mount the "cpuset" filesystem, we
  * silently switch it to mount "cgroup" instead
@@ -2356,6 +2367,29 @@ int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
         return nodes_intersects(tsk1->mems_allowed, tsk2->mems_allowed);
 }
 
+/**
+ * cpuset_print_task_mems_allowed - prints task's cpuset and mems_allowed
+ * @task: pointer to task_struct of some task.
+ *
+ * Description: Prints @task's name, cpuset name, and cached copy of its
+ * mems_allowed to the kernel log.  Must hold task_lock(task) to allow
+ * dereferencing task_cs(task).
+ */
+void cpuset_print_task_mems_allowed(struct task_struct *tsk)
+{
+        struct dentry *dentry;
+
+        dentry = task_cs(tsk)->css.cgroup->dentry;
+        spin_lock(&cpuset_buffer_lock);
+        snprintf(cpuset_name, CPUSET_NAME_LEN,
+                 dentry ? (const char *)dentry->d_name.name : "/");
+        nodelist_scnprintf(cpuset_nodelist, CPUSET_NODELIST_LEN,
+                           tsk->mems_allowed);
+        printk(KERN_INFO "%s cpuset=%s mems_allowed=%s\n",
+               tsk->comm, cpuset_name, cpuset_nodelist);
+        spin_unlock(&cpuset_buffer_lock);
+}
+
 /*
  * Collection of memory_pressure is suppressed unless
  * this flag is enabled by writing "1" to the special
diff --git a/kernel/dma-coherent.c b/kernel/dma-coherent.c
index f013a0c2e111..038707404b76 100644
--- a/kernel/dma-coherent.c
+++ b/kernel/dma-coherent.c
@@ -109,20 +109,40 @@ EXPORT_SYMBOL(dma_mark_declared_memory_occupied);
 int dma_alloc_from_coherent(struct device *dev, ssize_t size,
                                        dma_addr_t *dma_handle, void **ret)
 {
-        struct dma_coherent_mem *mem = dev ? dev->dma_mem : NULL;
+        struct dma_coherent_mem *mem;
         int order = get_order(size);
+        int pageno;
 
-        if (mem) {
-                int page = bitmap_find_free_region(mem->bitmap, mem->size,
-                                                     order);
-                if (page >= 0) {
-                        *dma_handle = mem->device_base + (page << PAGE_SHIFT);
-                        *ret = mem->virt_base + (page << PAGE_SHIFT);
-                        memset(*ret, 0, size);
-                } else if (mem->flags & DMA_MEMORY_EXCLUSIVE)
-                        *ret = NULL;
+        if (!dev)
+                return 0;
+        mem = dev->dma_mem;
+        if (!mem)
+                return 0;
+        if (unlikely(size > mem->size))
+                return 0;
+
+        pageno = bitmap_find_free_region(mem->bitmap, mem->size, order);
+        if (pageno >= 0) {
+                /*
+                 * Memory was found in the per-device arena.
+                 */
+                *dma_handle = mem->device_base + (pageno << PAGE_SHIFT);
+                *ret = mem->virt_base + (pageno << PAGE_SHIFT);
+                memset(*ret, 0, size);
+        } else if (mem->flags & DMA_MEMORY_EXCLUSIVE) {
+                /*
+                 * The per-device arena is exhausted and we are not
+                 * permitted to fall back to generic memory.
+                 */
+                *ret = NULL;
+        } else {
+                /*
+                 * The per-device arena is exhausted and we are
+                 * permitted to fall back to generic memory.
+                 */
+                 return 0;
         }
-        return (mem != NULL);
+        return 1;
 }
 EXPORT_SYMBOL(dma_alloc_from_coherent);
 
diff --git a/kernel/exit.c b/kernel/exit.c
index c9e5a1c14e08..c7740fa3252c 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -642,35 +642,31 @@ retry:
         /*
          * We found no owner yet mm_users > 1: this implies that we are
          * most likely racing with swapoff (try_to_unuse()) or /proc or
-         * ptrace or page migration (get_task_mm()).  Mark owner as NULL,
-         * so that subsystems can understand the callback and take action.
+         * ptrace or page migration (get_task_mm()).  Mark owner as NULL.
          */
-        down_write(&mm->mmap_sem);
-        cgroup_mm_owner_callbacks(mm->owner, NULL);
         mm->owner = NULL;
-        up_write(&mm->mmap_sem);
         return;
 
 assign_new_owner:
         BUG_ON(c == p);
         get_task_struct(c);
-        read_unlock(&tasklist_lock);
-        down_write(&mm->mmap_sem);
         /*
          * The task_lock protects c->mm from changing.
          * We always want mm->owner->mm == mm
          */
         task_lock(c);
+        /*
+         * Delay read_unlock() till we have the task_lock()
+         * to ensure that c does not slip away underneath us
+         */
+        read_unlock(&tasklist_lock);
         if (c->mm != mm) {
                 task_unlock(c);
-                up_write(&mm->mmap_sem);
                 put_task_struct(c);
                 goto retry;
         }
-        cgroup_mm_owner_callbacks(mm->owner, c);
         mm->owner = c;
         task_unlock(c);
-        up_write(&mm->mmap_sem);
         put_task_struct(c);
 }
 #endif /* CONFIG_MM_OWNER */
@@ -1055,10 +1051,7 @@ NORET_TYPE void do_exit(long code)
                                 preempt_count());
 
         acct_update_integrals(tsk);
-        if (tsk->mm) {
-                update_hiwater_rss(tsk->mm);
-                update_hiwater_vm(tsk->mm);
-        }
+
         group_dead = atomic_dec_and_test(&tsk->signal->live);
         if (group_dead) {
                 hrtimer_cancel(&tsk->signal->real_timer);
diff --git a/kernel/fork.c b/kernel/fork.c
index 43cbf30669e6..7b8f2a78be3d 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -400,6 +400,18 @@ __cacheline_aligned_in_smp DEFINE_SPINLOCK(mmlist_lock);
 #define allocate_mm()   (kmem_cache_alloc(mm_cachep, GFP_KERNEL))
 #define free_mm(mm)     (kmem_cache_free(mm_cachep, (mm)))
 
+static unsigned long default_dump_filter = MMF_DUMP_FILTER_DEFAULT;
+
+static int __init coredump_filter_setup(char *s)
+{
+        default_dump_filter =
+                (simple_strtoul(s, NULL, 0) << MMF_DUMP_FILTER_SHIFT) &
+                MMF_DUMP_FILTER_MASK;
+        return 1;
+}
+
+__setup("coredump_filter=", coredump_filter_setup);
+
 #include <linux/init_task.h>
 
 static struct mm_struct * mm_init(struct mm_struct * mm, struct task_struct *p)
@@ -408,8 +420,7 @@ static struct mm_struct * mm_init(struct mm_struct * mm, struct task_struct *p)
         atomic_set(&mm->mm_count, 1);
         init_rwsem(&mm->mmap_sem);
         INIT_LIST_HEAD(&mm->mmlist);
-        mm->flags = (current->mm) ? current->mm->flags
-                                  : MMF_DUMP_FILTER_DEFAULT;
+        mm->flags = (current->mm) ? current->mm->flags : default_dump_filter;
         mm->core_state = NULL;
         mm->nr_ptes = 0;
         set_mm_counter(mm, file_rss, 0);
@@ -758,7 +769,7 @@ static int copy_sighand(unsigned long clone_flags, struct task_struct *tsk)
 {
         struct sighand_struct *sig;
 
-        if (clone_flags & (CLONE_SIGHAND | CLONE_THREAD)) {
+        if (clone_flags & CLONE_SIGHAND) {
                 atomic_inc(&current->sighand->count);
                 return 0;
         }
diff --git a/kernel/futex.c b/kernel/futex.c
index 7c6cbabe52b3..002aa189eb09 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -170,8 +170,11 @@ static void get_futex_key_refs(union futex_key *key)
  */
 static void drop_futex_key_refs(union futex_key *key)
 {
-        if (!key->both.ptr)
+        if (!key->both.ptr) {
+                /* If we're here then we tried to put a key we failed to get */
+                WARN_ON_ONCE(1);
                 return;
+        }
 
         switch (key->both.offset & (FUT_OFF_INODE|FUT_OFF_MMSHARED)) {
         case FUT_OFF_INODE:
@@ -730,8 +733,8 @@ static int futex_wake(u32 __user *uaddr, int fshared, int nr_wake, u32 bitset)
         }
 
         spin_unlock(&hb->lock);
-out:
         put_futex_key(fshared, &key);
+out:
         return ret;
 }
 
@@ -755,7 +758,7 @@ retryfull:
                 goto out;
         ret = get_futex_key(uaddr2, fshared, &key2);
         if (unlikely(ret != 0))
-                goto out;
+                goto out_put_key1;
 
         hb1 = hash_futex(&key1);
         hb2 = hash_futex(&key2);
@@ -777,12 +780,12 @@ retry:
                  * but we might get them from range checking
                  */
                 ret = op_ret;
-                goto out;
+                goto out_put_keys;
 #endif
 
                 if (unlikely(op_ret != -EFAULT)) {
                         ret = op_ret;
-                        goto out;
+                        goto out_put_keys;
                 }
 
                 /*
@@ -796,7 +799,7 @@ retry:
                         ret = futex_handle_fault((unsigned long)uaddr2,
                                                  attempt);
                         if (ret)
-                                goto out;
+                                goto out_put_keys;
                         goto retry;
                 }
 
@@ -834,10 +837,11 @@ retry:
         spin_unlock(&hb1->lock);
         if (hb1 != hb2)
                 spin_unlock(&hb2->lock);
-out:
+out_put_keys:
         put_futex_key(fshared, &key2);
+out_put_key1:
         put_futex_key(fshared, &key1);
-
+out:
         return ret;
 }
 
@@ -854,13 +858,13 @@ static int futex_requeue(u32 __user *uaddr1, int fshared, u32 __user *uaddr2,
         struct futex_q *this, *next;
         int ret, drop_count = 0;
 
- retry:
+retry:
         ret = get_futex_key(uaddr1, fshared, &key1);
         if (unlikely(ret != 0))
                 goto out;
         ret = get_futex_key(uaddr2, fshared, &key2);
         if (unlikely(ret != 0))
-                goto out;
+                goto out_put_key1;
 
         hb1 = hash_futex(&key1);
         hb2 = hash_futex(&key2);
@@ -882,7 +886,7 @@ static int futex_requeue(u32 __user *uaddr1, int fshared, u32 __user *uaddr2,
                         if (!ret)
                                 goto retry;
 
-                        return ret;
+                        goto out_put_keys;
                 }
                 if (curval != *cmpval) {
                         ret = -EAGAIN;
@@ -927,9 +931,11 @@ out_unlock:
         while (--drop_count >= 0)
                 drop_futex_key_refs(&key1);
 
-out:
+out_put_keys:
         put_futex_key(fshared, &key2);
+out_put_key1:
         put_futex_key(fshared, &key1);
+out:
         return ret;
 }
 
@@ -990,7 +996,7 @@ static int unqueue_me(struct futex_q *q)
         int ret = 0;
 
         /* In the common case we don't take the spinlock, which is nice. */
- retry:
+retry:
         lock_ptr = q->lock_ptr;
         barrier();
         if (lock_ptr != NULL) {
@@ -1172,11 +1178,11 @@ static int futex_wait(u32 __user *uaddr, int fshared,
 
         q.pi_state = NULL;
         q.bitset = bitset;
- retry:
+retry:
         q.key = FUTEX_KEY_INIT;
         ret = get_futex_key(uaddr, fshared, &q.key);
         if (unlikely(ret != 0))
-                goto out_release_sem;
+                goto out;
 
         hb = queue_lock(&q);
 
@@ -1204,6 +1210,7 @@ static int futex_wait(u32 __user *uaddr, int fshared,
 
         if (unlikely(ret)) {
                 queue_unlock(&q, hb);
+                put_futex_key(fshared, &q.key);
 
                 ret = get_user(uval, uaddr);
 
@@ -1213,7 +1220,7 @@ static int futex_wait(u32 __user *uaddr, int fshared,
         }
         ret = -EWOULDBLOCK;
         if (uval != val)
-                goto out_unlock_release_sem;
+                goto out_unlock_put_key;
 
         /* Only actually queue if *uaddr contained val.  */
         queue_me(&q, hb);
@@ -1305,11 +1312,11 @@ static int futex_wait(u32 __user *uaddr, int fshared,
                 return -ERESTART_RESTARTBLOCK;
         }
 
- out_unlock_release_sem:
+out_unlock_put_key:
         queue_unlock(&q, hb);
-
- out_release_sem:
         put_futex_key(fshared, &q.key);
+
+out:
         return ret;
 }
 
@@ -1358,16 +1365,16 @@ static int futex_lock_pi(u32 __user *uaddr, int fshared,
         }
 
         q.pi_state = NULL;
- retry:
+retry:
         q.key = FUTEX_KEY_INIT;
         ret = get_futex_key(uaddr, fshared, &q.key);
         if (unlikely(ret != 0))
-                goto out_release_sem;
+                goto out;
 
- retry_unlocked:
+retry_unlocked:
         hb = queue_lock(&q);
 
- retry_locked:
+retry_locked:
         ret = lock_taken = 0;
 
         /*
@@ -1388,14 +1395,14 @@ static int futex_lock_pi(u32 __user *uaddr, int fshared,
          */
         if (unlikely((curval & FUTEX_TID_MASK) == task_pid_vnr(current))) {
                 ret = -EDEADLK;
-                goto out_unlock_release_sem;
+                goto out_unlock_put_key;
         }
 
         /*
          * Surprise - we got the lock. Just return to userspace:
          */
         if (unlikely(!curval))
-                goto out_unlock_release_sem;
+                goto out_unlock_put_key;
 
         uval = curval;
 
@@ -1431,7 +1438,7 @@ static int futex_lock_pi(u32 __user *uaddr, int fshared,
          * We took the lock due to owner died take over.
          */
         if (unlikely(lock_taken))
-                goto out_unlock_release_sem;
+                goto out_unlock_put_key;
 
         /*
          * We dont have the lock. Look up the PI state (or create it if
@@ -1470,7 +1477,7 @@ static int futex_lock_pi(u32 __user *uaddr, int fshared,
                                 goto retry_locked;
                         }
                 default:
-                        goto out_unlock_release_sem;
+                        goto out_unlock_put_key;
                 }
         }
 
@@ -1561,16 +1568,17 @@ static int futex_lock_pi(u32 __user *uaddr, int fshared,
                 destroy_hrtimer_on_stack(&to->timer);
         return ret != -EINTR ? ret : -ERESTARTNOINTR;
 
- out_unlock_release_sem:
+out_unlock_put_key:
         queue_unlock(&q, hb);
 
- out_release_sem:
+out_put_key:
         put_futex_key(fshared, &q.key);
+out:
         if (to)
                 destroy_hrtimer_on_stack(&to->timer);
         return ret;
 
- uaddr_faulted:
+uaddr_faulted:
         /*
          * We have to r/w  *(int __user *)uaddr, and we have to modify it
          * atomically.  Therefore, if we continue to fault after get_user()
@@ -1583,7 +1591,7 @@ static int futex_lock_pi(u32 __user *uaddr, int fshared,
         if (attempt++) {
                 ret = futex_handle_fault((unsigned long)uaddr, attempt);
                 if (ret)
-                        goto out_release_sem;
+                        goto out_put_key;
                 goto retry_unlocked;
         }
 
@@ -1675,9 +1683,9 @@ retry_unlocked:
 
 out_unlock:
         spin_unlock(&hb->lock);
-out:
         put_futex_key(fshared, &key);
 
+out:
         return ret;
 
 pi_faulted:
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index eb2bfefa6dcc..1455b7651b6b 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -634,7 +634,6 @@ static inline void hrtimer_init_timer_hres(struct hrtimer *timer)
 {
 }
 
-static void __run_hrtimer(struct hrtimer *timer);
 
 /*
  * When High resolution timers are active, try to reprogram. Note, that in case
@@ -646,13 +645,9 @@ static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
                                             struct hrtimer_clock_base *base)
 {
         if (base->cpu_base->hres_active && hrtimer_reprogram(timer, base)) {
-                /*
-                 * XXX: recursion check?
-                 * hrtimer_forward() should round up with timer granularity
-                 * so that we never get into inf recursion here,
-                 * it doesn't do that though
-                 */
-                __run_hrtimer(timer);
+                spin_unlock(&base->cpu_base->lock);
+                raise_softirq_irqoff(HRTIMER_SOFTIRQ);
+                spin_lock(&base->cpu_base->lock);
                 return 1;
         }
         return 0;
@@ -705,11 +700,6 @@ static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
 }
 static inline void hrtimer_init_hres(struct hrtimer_cpu_base *base) { }
 static inline void hrtimer_init_timer_hres(struct hrtimer *timer) { }
-static inline int hrtimer_reprogram(struct hrtimer *timer,
-                                    struct hrtimer_clock_base *base)
-{
-        return 0;
-}
 
 #endif /* CONFIG_HIGH_RES_TIMERS */
 
@@ -780,9 +770,11 @@ EXPORT_SYMBOL_GPL(hrtimer_forward);
  *
  * The timer is inserted in expiry order. Insertion into the
  * red black tree is O(log(n)). Must hold the base lock.
+ *
+ * Returns 1 when the new timer is the leftmost timer in the tree.
  */
-static void enqueue_hrtimer(struct hrtimer *timer,
-                            struct hrtimer_clock_base *base, int reprogram)
+static int enqueue_hrtimer(struct hrtimer *timer,
+                           struct hrtimer_clock_base *base)
 {
         struct rb_node **link = &base->active.rb_node;
         struct rb_node *parent = NULL;
@@ -814,20 +806,8 @@ static void enqueue_hrtimer(struct hrtimer *timer,
          * Insert the timer to the rbtree and check whether it
          * replaces the first pending timer
          */
-        if (leftmost) {
-                /*
-                 * Reprogram the clock event device. When the timer is already
-                 * expired hrtimer_enqueue_reprogram has either called the
-                 * callback or added it to the pending list and raised the
-                 * softirq.
-                 *
-                 * This is a NOP for !HIGHRES
-                 */
-                if (reprogram && hrtimer_enqueue_reprogram(timer, base))
-                        return;
-
+        if (leftmost)
                 base->first = &timer->node;
-        }
 
         rb_link_node(&timer->node, parent, link);
         rb_insert_color(&timer->node, &base->active);
@@ -836,6 +816,8 @@ static void enqueue_hrtimer(struct hrtimer *timer,
          * state of a possibly running callback.
          */
         timer->state |= HRTIMER_STATE_ENQUEUED;
+
+        return leftmost;
 }
 
 /*
@@ -912,7 +894,7 @@ hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, unsigned long delta_n
 {
         struct hrtimer_clock_base *base, *new_base;
         unsigned long flags;
-        int ret;
+        int ret, leftmost;
 
         base = lock_hrtimer_base(timer, &flags);
 
@@ -940,12 +922,16 @@ hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, unsigned long delta_n
 
         timer_stats_hrtimer_set_start_info(timer);
 
+        leftmost = enqueue_hrtimer(timer, new_base);
+
         /*
          * Only allow reprogramming if the new base is on this CPU.
          * (it might still be on another CPU if the timer was pending)
+         *
+         * XXX send_remote_softirq() ?
          */
-        enqueue_hrtimer(timer, new_base,
-                        new_base->cpu_base == &__get_cpu_var(hrtimer_bases));
+        if (leftmost && new_base->cpu_base == &__get_cpu_var(hrtimer_bases))
+                hrtimer_enqueue_reprogram(timer, new_base);
 
         unlock_hrtimer_base(timer, &flags);
 
@@ -1157,13 +1143,13 @@ static void __run_hrtimer(struct hrtimer *timer)
         spin_lock(&cpu_base->lock);
 
         /*
-         * Note: We clear the CALLBACK bit after enqueue_hrtimer to avoid
-         * reprogramming of the event hardware. This happens at the end of this
-         * function anyway.
+         * Note: We clear the CALLBACK bit after enqueue_hrtimer and
+         * we do not reprogramm the event hardware. Happens either in
+         * hrtimer_start_range_ns() or in hrtimer_interrupt()
          */
         if (restart != HRTIMER_NORESTART) {
                 BUG_ON(timer->state != HRTIMER_STATE_CALLBACK);
-                enqueue_hrtimer(timer, base, 0);
+                enqueue_hrtimer(timer, base);
         }
         timer->state &= ~HRTIMER_STATE_CALLBACK;
 }
@@ -1243,6 +1229,22 @@ void hrtimer_interrupt(struct clock_event_device *dev)
         }
 }
 
+/*
+ * local version of hrtimer_peek_ahead_timers() called with interrupts
+ * disabled.
+ */
+static void __hrtimer_peek_ahead_timers(void)
+{
+        struct tick_device *td;
+
+        if (!hrtimer_hres_active())
+                return;
+
+        td = &__get_cpu_var(tick_cpu_device);
+        if (td && td->evtdev)
+                hrtimer_interrupt(td->evtdev);
+}
+
 /**
  * hrtimer_peek_ahead_timers -- run soft-expired timers now
  *
@@ -1254,20 +1256,23 @@ void hrtimer_interrupt(struct clock_event_device *dev)
  */
 void hrtimer_peek_ahead_timers(void)
 {
-        struct tick_device *td;
         unsigned long flags;
 
-        if (!hrtimer_hres_active())
-                return;
-
         local_irq_save(flags);
-        td = &__get_cpu_var(tick_cpu_device);
-        if (td && td->evtdev)
-                hrtimer_interrupt(td->evtdev);
+        __hrtimer_peek_ahead_timers();
         local_irq_restore(flags);
 }
 
-#endif  /* CONFIG_HIGH_RES_TIMERS */
+static void run_hrtimer_softirq(struct softirq_action *h)
+{
+        hrtimer_peek_ahead_timers();
+}
+
+#else /* CONFIG_HIGH_RES_TIMERS */
+
+static inline void __hrtimer_peek_ahead_timers(void) { }
+
+#endif  /* !CONFIG_HIGH_RES_TIMERS */
 
 /*
  * Called from timer softirq every jiffy, expire hrtimers:
@@ -1513,39 +1518,36 @@ static void migrate_hrtimer_list(struct hrtimer_clock_base *old_base,
                 __remove_hrtimer(timer, old_base, HRTIMER_STATE_MIGRATE, 0);
                 timer->base = new_base;
                 /*
-                 * Enqueue the timers on the new cpu, but do not reprogram 
-                 * the timer as that would enable a deadlock between
-                 * hrtimer_enqueue_reprogramm() running the timer and us still
-                 * holding a nested base lock.
-                 *
-                 * Instead we tickle the hrtimer interrupt after the migration
-                 * is done, which will run all expired timers and re-programm
-                 * the timer device.
+                 * Enqueue the timers on the new cpu. This does not
+                 * reprogram the event device in case the timer
+                 * expires before the earliest on this CPU, but we run
+                 * hrtimer_interrupt after we migrated everything to
+                 * sort out already expired timers and reprogram the
+                 * event device.
                  */
-                enqueue_hrtimer(timer, new_base, 0);
+                enqueue_hrtimer(timer, new_base);
 
                 /* Clear the migration state bit */
                 timer->state &= ~HRTIMER_STATE_MIGRATE;
         }
 }
 
-static int migrate_hrtimers(int scpu)
+static void migrate_hrtimers(int scpu)
 {
         struct hrtimer_cpu_base *old_base, *new_base;
-        int dcpu, i;
+        int i;
 
         BUG_ON(cpu_online(scpu));
-        old_base = &per_cpu(hrtimer_bases, scpu);
-        new_base = &get_cpu_var(hrtimer_bases);
-
-        dcpu = smp_processor_id();
-
         tick_cancel_sched_timer(scpu);
+
+        local_irq_disable();
+        old_base = &per_cpu(hrtimer_bases, scpu);
+        new_base = &__get_cpu_var(hrtimer_bases);
         /*
          * The caller is globally serialized and nobody else
          * takes two locks at once, deadlock is not possible.
          */
-        spin_lock_irq(&new_base->lock);
+        spin_lock(&new_base->lock);
         spin_lock_nested(&old_base->lock, SINGLE_DEPTH_NESTING);
 
         for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
@@ -1554,15 +1556,11 @@ static int migrate_hrtimers(int scpu)
         }
 
         spin_unlock(&old_base->lock);
-        spin_unlock_irq(&new_base->lock);
-        put_cpu_var(hrtimer_bases);
+        spin_unlock(&new_base->lock);
 
-        return dcpu;
-}
-
-static void tickle_timers(void *arg)
-{
-        hrtimer_peek_ahead_timers();
+        /* Check, if we got expired work to do */
+        __hrtimer_peek_ahead_timers();
+        local_irq_enable();
 }
 
 #endif /* CONFIG_HOTPLUG_CPU */
@@ -1583,11 +1581,8 @@ static int __cpuinit hrtimer_cpu_notify(struct notifier_block *self,
         case CPU_DEAD:
         case CPU_DEAD_FROZEN:
         {
-                int dcpu;
-
                 clockevents_notify(CLOCK_EVT_NOTIFY_CPU_DEAD, &scpu);
-                dcpu = migrate_hrtimers(scpu);
-                smp_call_function_single(dcpu, tickle_timers, NULL, 0);
+                migrate_hrtimers(scpu);
                 break;
         }
 #endif
@@ -1608,6 +1603,9 @@ void __init hrtimers_init(void)
         hrtimer_cpu_notify(&hrtimers_nb, (unsigned long)CPU_UP_PREPARE,
                           (void *)(long)smp_processor_id());
         register_cpu_notifier(&hrtimers_nb);
+#ifdef CONFIG_HIGH_RES_TIMERS
+        open_softirq(HRTIMER_SOFTIRQ, run_hrtimer_softirq);
+#endif
 }
 
 /**
diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c
index cc0f7321b8ce..1de9700f416e 100644
--- a/kernel/irq/autoprobe.c
+++ b/kernel/irq/autoprobe.c
@@ -10,6 +10,7 @@
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
+#include <linux/async.h>
 
 #include "internals.h"
 
@@ -34,6 +35,10 @@ unsigned long probe_irq_on(void)
         unsigned int status;
         int i;
 
+        /*
+         * quiesce the kernel, or at least the asynchronous portion
+         */
+        async_synchronize_full();
         mutex_lock(&probing_active);
         /*
          * something may have generated an irq long ago and we want to
diff --git a/kernel/kmod.c b/kernel/kmod.c
index b46dbb908669..a27a5f64443d 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -51,8 +51,8 @@ char modprobe_path[KMOD_PATH_LEN] = "/sbin/modprobe";
 
 /**
  * request_module - try to load a kernel module
- * @fmt:     printf style format string for the name of the module
- * @varargs: arguements as specified in the format string
+ * @fmt: printf style format string for the name of the module
+ * @...: arguments as specified in the format string
  *
  * Load a module using the user mode module loader. The function returns
  * zero on success or a negative errno code on failure. Note that a
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 9f8a3f25259a..1b9cbdc0127a 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -69,7 +69,7 @@ static struct hlist_head kretprobe_inst_table[KPROBE_TABLE_SIZE];
 /* NOTE: change this value only with kprobe_mutex held */
 static bool kprobe_enabled;
 
-DEFINE_MUTEX(kprobe_mutex);             /* Protects kprobe_table */
+static DEFINE_MUTEX(kprobe_mutex);      /* Protects kprobe_table */
 static DEFINE_PER_CPU(struct kprobe *, kprobe_instance) = NULL;
 static struct {
         spinlock_t lock ____cacheline_aligned_in_smp;
@@ -115,6 +115,7 @@ enum kprobe_slot_state {
         SLOT_USED = 2,
 };
 
+static DEFINE_MUTEX(kprobe_insn_mutex); /* Protects kprobe_insn_pages */
 static struct hlist_head kprobe_insn_pages;
 static int kprobe_garbage_slots;
 static int collect_garbage_slots(void);
@@ -144,10 +145,10 @@ loop_end:
 }
 
 /**
- * get_insn_slot() - Find a slot on an executable page for an instruction.
+ * __get_insn_slot() - Find a slot on an executable page for an instruction.
  * We allocate an executable page if there's no room on existing ones.
  */
-kprobe_opcode_t __kprobes *get_insn_slot(void)
+static kprobe_opcode_t __kprobes *__get_insn_slot(void)
 {
         struct kprobe_insn_page *kip;
         struct hlist_node *pos;
@@ -196,6 +197,15 @@ kprobe_opcode_t __kprobes *get_insn_slot(void)
         return kip->insns;
 }
 
+kprobe_opcode_t __kprobes *get_insn_slot(void)
+{
+        kprobe_opcode_t *ret;
+        mutex_lock(&kprobe_insn_mutex);
+        ret = __get_insn_slot();
+        mutex_unlock(&kprobe_insn_mutex);
+        return ret;
+}
+
 /* Return 1 if all garbages are collected, otherwise 0. */
 static int __kprobes collect_one_slot(struct kprobe_insn_page *kip, int idx)
 {
@@ -226,9 +236,13 @@ static int __kprobes collect_garbage_slots(void)
 {
         struct kprobe_insn_page *kip;
         struct hlist_node *pos, *next;
+        int safety;
 
         /* Ensure no-one is preepmted on the garbages */
-        if (check_safety() != 0)
+        mutex_unlock(&kprobe_insn_mutex);
+        safety = check_safety();
+        mutex_lock(&kprobe_insn_mutex);
+        if (safety != 0)
                 return -EAGAIN;
 
         hlist_for_each_entry_safe(kip, pos, next, &kprobe_insn_pages, hlist) {
@@ -251,6 +265,7 @@ void __kprobes free_insn_slot(kprobe_opcode_t * slot, int dirty)
         struct kprobe_insn_page *kip;
         struct hlist_node *pos;
 
+        mutex_lock(&kprobe_insn_mutex);
         hlist_for_each_entry(kip, pos, &kprobe_insn_pages, hlist) {
                 if (kip->insns <= slot &&
                     slot < kip->insns + (INSNS_PER_PAGE * MAX_INSN_SIZE)) {
@@ -267,6 +282,8 @@ void __kprobes free_insn_slot(kprobe_opcode_t * slot, int dirty)
 
         if (dirty && ++kprobe_garbage_slots > INSNS_PER_PAGE)
                 collect_garbage_slots();
+
+        mutex_unlock(&kprobe_insn_mutex);
 }
 #endif
 
@@ -310,7 +327,7 @@ static int __kprobes aggr_pre_handler(struct kprobe *p, struct pt_regs *regs)
         struct kprobe *kp;
 
         list_for_each_entry_rcu(kp, &p->list, list) {
-                if (kp->pre_handler) {
+                if (kp->pre_handler && !kprobe_gone(kp)) {
                         set_kprobe_instance(kp);
                         if (kp->pre_handler(kp, regs))
                                 return 1;
@@ -326,7 +343,7 @@ static void __kprobes aggr_post_handler(struct kprobe *p, struct pt_regs *regs,
         struct kprobe *kp;
 
         list_for_each_entry_rcu(kp, &p->list, list) {
-                if (kp->post_handler) {
+                if (kp->post_handler && !kprobe_gone(kp)) {
                         set_kprobe_instance(kp);
                         kp->post_handler(kp, regs, flags);
                         reset_kprobe_instance();
@@ -393,7 +410,7 @@ void __kprobes recycle_rp_inst(struct kretprobe_instance *ri,
                 hlist_add_head(&ri->hlist, head);
 }
 
-void kretprobe_hash_lock(struct task_struct *tsk,
+void __kprobes kretprobe_hash_lock(struct task_struct *tsk,
                          struct hlist_head **head, unsigned long *flags)
 {
         unsigned long hash = hash_ptr(tsk, KPROBE_HASH_BITS);
@@ -404,13 +421,15 @@ void kretprobe_hash_lock(struct task_struct *tsk,
         spin_lock_irqsave(hlist_lock, *flags);
 }
 
-static void kretprobe_table_lock(unsigned long hash, unsigned long *flags)
+static void __kprobes kretprobe_table_lock(unsigned long hash,
+        unsigned long *flags)
 {
         spinlock_t *hlist_lock = kretprobe_table_lock_ptr(hash);
         spin_lock_irqsave(hlist_lock, *flags);
 }
 
-void kretprobe_hash_unlock(struct task_struct *tsk, unsigned long *flags)
+void __kprobes kretprobe_hash_unlock(struct task_struct *tsk,
+        unsigned long *flags)
 {
         unsigned long hash = hash_ptr(tsk, KPROBE_HASH_BITS);
         spinlock_t *hlist_lock;
@@ -419,7 +438,7 @@ void kretprobe_hash_unlock(struct task_struct *tsk, unsigned long *flags)
         spin_unlock_irqrestore(hlist_lock, *flags);
 }
 
-void kretprobe_table_unlock(unsigned long hash, unsigned long *flags)
+void __kprobes kretprobe_table_unlock(unsigned long hash, unsigned long *flags)
 {
         spinlock_t *hlist_lock = kretprobe_table_lock_ptr(hash);
         spin_unlock_irqrestore(hlist_lock, *flags);
@@ -526,9 +545,10 @@ static inline void add_aggr_kprobe(struct kprobe *ap, struct kprobe *p)
         ap->addr = p->addr;
         ap->pre_handler = aggr_pre_handler;
         ap->fault_handler = aggr_fault_handler;
-        if (p->post_handler)
+        /* We don't care the kprobe which has gone. */
+        if (p->post_handler && !kprobe_gone(p))
                 ap->post_handler = aggr_post_handler;
-        if (p->break_handler)
+        if (p->break_handler && !kprobe_gone(p))
                 ap->break_handler = aggr_break_handler;
 
         INIT_LIST_HEAD(&ap->list);
@@ -547,17 +567,41 @@ static int __kprobes register_aggr_kprobe(struct kprobe *old_p,
         int ret = 0;
         struct kprobe *ap;
 
+        if (kprobe_gone(old_p)) {
+                /*
+                 * Attempting to insert new probe at the same location that
+                 * had a probe in the module vaddr area which already
+                 * freed. So, the instruction slot has already been
+                 * released. We need a new slot for the new probe.
+                 */
+                ret = arch_prepare_kprobe(old_p);
+                if (ret)
+                        return ret;
+        }
         if (old_p->pre_handler == aggr_pre_handler) {
                 copy_kprobe(old_p, p);
                 ret = add_new_kprobe(old_p, p);
+                ap = old_p;
         } else {
                 ap = kzalloc(sizeof(struct kprobe), GFP_KERNEL);
-                if (!ap)
+                if (!ap) {
+                        if (kprobe_gone(old_p))
+                                arch_remove_kprobe(old_p);
                         return -ENOMEM;
+                }
                 add_aggr_kprobe(ap, old_p);
                 copy_kprobe(ap, p);
                 ret = add_new_kprobe(ap, p);
         }
+        if (kprobe_gone(old_p)) {
+                /*
+                 * If the old_p has gone, its breakpoint has been disarmed.
+                 * We have to arm it again after preparing real kprobes.
+                 */
+                ap->flags &= ~KPROBE_FLAG_GONE;
+                if (kprobe_enabled)
+                        arch_arm_kprobe(ap);
+        }
         return ret;
 }
 
@@ -600,8 +644,7 @@ static kprobe_opcode_t __kprobes *kprobe_addr(struct kprobe *p)
         return (kprobe_opcode_t *)(((char *)addr) + p->offset);
 }
 
-static int __kprobes __register_kprobe(struct kprobe *p,
-        unsigned long called_from)
+int __kprobes register_kprobe(struct kprobe *p)
 {
         int ret = 0;
         struct kprobe *old_p;
@@ -620,28 +663,30 @@ static int __kprobes __register_kprobe(struct kprobe *p,
                 return -EINVAL;
         }
 
-        p->mod_refcounted = 0;
-
+        p->flags = 0;
         /*
          * Check if are we probing a module.
          */
         probed_mod = __module_text_address((unsigned long) p->addr);
         if (probed_mod) {
-                struct module *calling_mod;
-                calling_mod = __module_text_address(called_from);
                 /*
-                 * We must allow modules to probe themself and in this case
-                 * avoid incrementing the module refcount, so as to allow
-                 * unloading of self probing modules.
+                 * We must hold a refcount of the probed module while updating
+                 * its code to prohibit unexpected unloading.
                  */
-                if (calling_mod && calling_mod != probed_mod) {
-                        if (unlikely(!try_module_get(probed_mod))) {
-                                preempt_enable();
-                                return -EINVAL;
-                        }
-                        p->mod_refcounted = 1;
-                } else
-                        probed_mod = NULL;
+                if (unlikely(!try_module_get(probed_mod))) {
+                        preempt_enable();
+                        return -EINVAL;
+                }
+                /*
+                 * If the module freed .init.text, we couldn't insert
+                 * kprobes in there.
+                 */
+                if (within_module_init((unsigned long)p->addr, probed_mod) &&
+                    probed_mod->state != MODULE_STATE_COMING) {
+                        module_put(probed_mod);
+                        preempt_enable();
+                        return -EINVAL;
+                }
         }
         preempt_enable();
 
@@ -668,8 +713,9 @@ static int __kprobes __register_kprobe(struct kprobe *p,
 out:
         mutex_unlock(&kprobe_mutex);
 
-        if (ret && probed_mod)
+        if (probed_mod)
                 module_put(probed_mod);
+
         return ret;
 }
 
@@ -697,16 +743,16 @@ valid_p:
              list_is_singular(&old_p->list))) {
                 /*
                  * Only probe on the hash list. Disarm only if kprobes are
-                 * enabled - otherwise, the breakpoint would already have
-                 * been removed. We save on flushing icache.
+                 * enabled and not gone - otherwise, the breakpoint would
+                 * already have been removed. We save on flushing icache.
                  */
-                if (kprobe_enabled)
+                if (kprobe_enabled && !kprobe_gone(old_p))
                         arch_disarm_kprobe(p);
                 hlist_del_rcu(&old_p->hlist);
         } else {
-                if (p->break_handler)
+                if (p->break_handler && !kprobe_gone(p))
                         old_p->break_handler = NULL;
-                if (p->post_handler) {
+                if (p->post_handler && !kprobe_gone(p)) {
                         list_for_each_entry_rcu(list_p, &old_p->list, list) {
                                 if ((list_p != p) && (list_p->post_handler))
                                         goto noclean;
@@ -721,39 +767,27 @@ noclean:
 
 static void __kprobes __unregister_kprobe_bottom(struct kprobe *p)
 {
-        struct module *mod;
         struct kprobe *old_p;
 
-        if (p->mod_refcounted) {
-                /*
-                 * Since we've already incremented refcount,
-                 * we don't need to disable preemption.
-                 */
-                mod = module_text_address((unsigned long)p->addr);
-                if (mod)
-                        module_put(mod);
-        }
-
-        if (list_empty(&p->list) || list_is_singular(&p->list)) {
-                if (!list_empty(&p->list)) {
-                        /* "p" is the last child of an aggr_kprobe */
-                        old_p = list_entry(p->list.next, struct kprobe, list);
-                        list_del(&p->list);
-                        kfree(old_p);
-                }
+        if (list_empty(&p->list))
                 arch_remove_kprobe(p);
+        else if (list_is_singular(&p->list)) {
+                /* "p" is the last child of an aggr_kprobe */
+                old_p = list_entry(p->list.next, struct kprobe, list);
+                list_del(&p->list);
+                arch_remove_kprobe(old_p);
+                kfree(old_p);
         }
 }
 
-static int __register_kprobes(struct kprobe **kps, int num,
-        unsigned long called_from)
+int __kprobes register_kprobes(struct kprobe **kps, int num)
 {
         int i, ret = 0;
 
         if (num <= 0)
                 return -EINVAL;
         for (i = 0; i < num; i++) {
-                ret = __register_kprobe(kps[i], called_from);
+                ret = register_kprobe(kps[i]);
                 if (ret < 0) {
                         if (i > 0)
                                 unregister_kprobes(kps, i);
@@ -763,26 +797,11 @@ static int __register_kprobes(struct kprobe **kps, int num,
         return ret;
 }
 
-/*
- * Registration and unregistration functions for kprobe.
- */
-int __kprobes register_kprobe(struct kprobe *p)
-{
-        return __register_kprobes(&p, 1,
-                                  (unsigned long)__builtin_return_address(0));
-}
-
 void __kprobes unregister_kprobe(struct kprobe *p)
 {
         unregister_kprobes(&p, 1);
 }
 
-int __kprobes register_kprobes(struct kprobe **kps, int num)
-{
-        return __register_kprobes(kps, num,
-                                  (unsigned long)__builtin_return_address(0));
-}
-
 void __kprobes unregister_kprobes(struct kprobe **kps, int num)
 {
         int i;
@@ -811,8 +830,7 @@ unsigned long __weak arch_deref_entry_point(void *entry)
         return (unsigned long)entry;
 }
 
-static int __register_jprobes(struct jprobe **jps, int num,
-        unsigned long called_from)
+int __kprobes register_jprobes(struct jprobe **jps, int num)
 {
         struct jprobe *jp;
         int ret = 0, i;
@@ -830,7 +848,7 @@ static int __register_jprobes(struct jprobe **jps, int num,
                         /* Todo: Verify probepoint is a function entry point */
                         jp->kp.pre_handler = setjmp_pre_handler;
                         jp->kp.break_handler = longjmp_break_handler;
-                        ret = __register_kprobe(&jp->kp, called_from);
+                        ret = register_kprobe(&jp->kp);
                 }
                 if (ret < 0) {
                         if (i > 0)
@@ -843,8 +861,7 @@ static int __register_jprobes(struct jprobe **jps, int num,
 
 int __kprobes register_jprobe(struct jprobe *jp)
 {
-        return __register_jprobes(&jp, 1,
-                (unsigned long)__builtin_return_address(0));
+        return register_jprobes(&jp, 1);
 }
 
 void __kprobes unregister_jprobe(struct jprobe *jp)
@@ -852,12 +869,6 @@ void __kprobes unregister_jprobe(struct jprobe *jp)
         unregister_jprobes(&jp, 1);
 }
 
-int __kprobes register_jprobes(struct jprobe **jps, int num)
-{
-        return __register_jprobes(jps, num,
-                (unsigned long)__builtin_return_address(0));
-}
-
 void __kprobes unregister_jprobes(struct jprobe **jps, int num)
 {
         int i;
@@ -920,8 +931,7 @@ static int __kprobes pre_handler_kretprobe(struct kprobe *p,
         return 0;
 }
 
-static int __kprobes __register_kretprobe(struct kretprobe *rp,
-                                          unsigned long called_from)
+int __kprobes register_kretprobe(struct kretprobe *rp)
 {
         int ret = 0;
         struct kretprobe_instance *inst;
@@ -967,21 +977,20 @@ static int __kprobes __register_kretprobe(struct kretprobe *rp,
 
         rp->nmissed = 0;
         /* Establish function entry probe point */
-        ret = __register_kprobe(&rp->kp, called_from);
+        ret = register_kprobe(&rp->kp);
         if (ret != 0)
                 free_rp_inst(rp);
         return ret;
 }
 
-static int __register_kretprobes(struct kretprobe **rps, int num,
-        unsigned long called_from)
+int __kprobes register_kretprobes(struct kretprobe **rps, int num)
 {
         int ret = 0, i;
 
         if (num <= 0)
                 return -EINVAL;
         for (i = 0; i < num; i++) {
-                ret = __register_kretprobe(rps[i], called_from);
+                ret = register_kretprobe(rps[i]);
                 if (ret < 0) {
                         if (i > 0)
                                 unregister_kretprobes(rps, i);
@@ -991,23 +1000,11 @@ static int __register_kretprobes(struct kretprobe **rps, int num,
         return ret;
 }
 
-int __kprobes register_kretprobe(struct kretprobe *rp)
-{
-        return __register_kretprobes(&rp, 1,
-                        (unsigned long)__builtin_return_address(0));
-}
-
 void __kprobes unregister_kretprobe(struct kretprobe *rp)
 {
         unregister_kretprobes(&rp, 1);
 }
 
-int __kprobes register_kretprobes(struct kretprobe **rps, int num)
-{
-        return __register_kretprobes(rps, num,
-                        (unsigned long)__builtin_return_address(0));
-}
-
 void __kprobes unregister_kretprobes(struct kretprobe **rps, int num)
 {
         int i;
@@ -1055,6 +1052,72 @@ static int __kprobes pre_handler_kretprobe(struct kprobe *p,
 
 #endif /* CONFIG_KRETPROBES */
 
+/* Set the kprobe gone and remove its instruction buffer. */
+static void __kprobes kill_kprobe(struct kprobe *p)
+{
+        struct kprobe *kp;
+        p->flags |= KPROBE_FLAG_GONE;
+        if (p->pre_handler == aggr_pre_handler) {
+                /*
+                 * If this is an aggr_kprobe, we have to list all the
+                 * chained probes and mark them GONE.
+                 */
+                list_for_each_entry_rcu(kp, &p->list, list)
+                        kp->flags |= KPROBE_FLAG_GONE;
+                p->post_handler = NULL;
+                p->break_handler = NULL;
+        }
+        /*
+         * Here, we can remove insn_slot safely, because no thread calls
+         * the original probed function (which will be freed soon) any more.
+         */
+        arch_remove_kprobe(p);
+}
+
+/* Module notifier call back, checking kprobes on the module */
+static int __kprobes kprobes_module_callback(struct notifier_block *nb,
+                                             unsigned long val, void *data)
+{
+        struct module *mod = data;
+        struct hlist_head *head;
+        struct hlist_node *node;
+        struct kprobe *p;
+        unsigned int i;
+        int checkcore = (val == MODULE_STATE_GOING);
+
+        if (val != MODULE_STATE_GOING && val != MODULE_STATE_LIVE)
+                return NOTIFY_DONE;
+
+        /*
+         * When MODULE_STATE_GOING was notified, both of module .text and
+         * .init.text sections would be freed. When MODULE_STATE_LIVE was
+         * notified, only .init.text section would be freed. We need to
+         * disable kprobes which have been inserted in the sections.
+         */
+        mutex_lock(&kprobe_mutex);
+        for (i = 0; i < KPROBE_TABLE_SIZE; i++) {
+                head = &kprobe_table[i];
+                hlist_for_each_entry_rcu(p, node, head, hlist)
+                        if (within_module_init((unsigned long)p->addr, mod) ||
+                            (checkcore &&
+                             within_module_core((unsigned long)p->addr, mod))) {
+                                /*
+                                 * The vaddr this probe is installed will soon
+                                 * be vfreed buy not synced to disk. Hence,
+                                 * disarming the breakpoint isn't needed.
+                                 */
+                                kill_kprobe(p);
+                        }
+        }
+        mutex_unlock(&kprobe_mutex);
+        return NOTIFY_DONE;
+}
+
+static struct notifier_block kprobe_module_nb = {
+        .notifier_call = kprobes_module_callback,
+        .priority = 0
+};
+
 static int __init init_kprobes(void)
 {
         int i, err = 0;
@@ -1111,6 +1174,9 @@ static int __init init_kprobes(void)
         err = arch_init_kprobes();
         if (!err)
                 err = register_die_notifier(&kprobe_exceptions_nb);
+        if (!err)
+                err = register_module_notifier(&kprobe_module_nb);
+
         kprobes_initialized = (err == 0);
 
         if (!err)
@@ -1131,10 +1197,12 @@ static void __kprobes report_probe(struct seq_file *pi, struct kprobe *p,
         else
                 kprobe_type = "k";
         if (sym)
-                seq_printf(pi, "%p  %s  %s+0x%x  %s\n", p->addr, kprobe_type,
-                        sym, offset, (modname ? modname : " "));
+                seq_printf(pi, "%p  %s  %s+0x%x  %s %s\n", p->addr, kprobe_type,
+                        sym, offset, (modname ? modname : " "),
+                        (kprobe_gone(p) ? "[GONE]" : ""));
         else
-                seq_printf(pi, "%p  %s  %p\n", p->addr, kprobe_type, p->addr);
+                seq_printf(pi, "%p  %s  %p %s\n", p->addr, kprobe_type, p->addr,
+                        (kprobe_gone(p) ? "[GONE]" : ""));
 }
 
 static void __kprobes *kprobe_seq_start(struct seq_file *f, loff_t *pos)
@@ -1215,7 +1283,8 @@ static void __kprobes enable_all_kprobes(void)
         for (i = 0; i < KPROBE_TABLE_SIZE; i++) {
                 head = &kprobe_table[i];
                 hlist_for_each_entry_rcu(p, node, head, hlist)
-                        arch_arm_kprobe(p);
+                        if (!kprobe_gone(p))
+                                arch_arm_kprobe(p);
         }
 
         kprobe_enabled = true;
@@ -1244,7 +1313,7 @@ static void __kprobes disable_all_kprobes(void)
         for (i = 0; i < KPROBE_TABLE_SIZE; i++) {
                 head = &kprobe_table[i];
                 hlist_for_each_entry_rcu(p, node, head, hlist) {
-                        if (!arch_trampoline_kprobe(p))
+                        if (!arch_trampoline_kprobe(p) && !kprobe_gone(p))
                                 arch_disarm_kprobe(p);
                 }
         }
diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c
index 08dd8ed86c77..528dd78e7e7e 100644
--- a/kernel/ksysfs.c
+++ b/kernel/ksysfs.c
@@ -24,7 +24,7 @@ static struct kobj_attribute _name##_attr = __ATTR_RO(_name)
 static struct kobj_attribute _name##_attr = \
         __ATTR(_name, 0644, _name##_show, _name##_store)
 
-#if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
+#if defined(CONFIG_HOTPLUG)
 /* current uevent sequence number */
 static ssize_t uevent_seqnum_show(struct kobject *kobj,
                                   struct kobj_attribute *attr, char *buf)
@@ -137,7 +137,7 @@ struct kobject *kernel_kobj;
 EXPORT_SYMBOL_GPL(kernel_kobj);
 
 static struct attribute * kernel_attrs[] = {
-#if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
+#if defined(CONFIG_HOTPLUG)
         &uevent_seqnum_attr.attr,
         &uevent_helper_attr.attr,
 #endif
diff --git a/kernel/module.c b/kernel/module.c
index f47cce910f25..c9332c90d5a0 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -43,7 +43,6 @@
 #include <linux/device.h>
 #include <linux/string.h>
 #include <linux/mutex.h>
-#include <linux/unwind.h>
 #include <linux/rculist.h>
 #include <asm/uaccess.h>
 #include <asm/cacheflush.h>
@@ -51,6 +50,7 @@
 #include <asm/sections.h>
 #include <linux/tracepoint.h>
 #include <linux/ftrace.h>
+#include <linux/async.h>
 
 #if 0
 #define DEBUGP printk
@@ -817,6 +817,7 @@ sys_delete_module(const char __user *name_user, unsigned int flags)
                 mod->exit();
         blocking_notifier_call_chain(&module_notify_list,
                                      MODULE_STATE_GOING, mod);
+        async_synchronize_full();
         mutex_lock(&module_mutex);
         /* Store the name of the last unloaded module for diagnostic purposes */
         strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module));
@@ -1449,8 +1450,6 @@ static void free_module(struct module *mod)
         remove_sect_attrs(mod);
         mod_kobject_remove(mod);
 
-        unwind_remove_table(mod->unwind_info, 0);
-
         /* Arch-specific cleanup. */
         module_arch_cleanup(mod);
 
@@ -1867,7 +1866,6 @@ static noinline struct module *load_module(void __user *umod,
         unsigned int symindex = 0;
         unsigned int strindex = 0;
         unsigned int modindex, versindex, infoindex, pcpuindex;
-        unsigned int unwindex = 0;
         unsigned int num_kp, num_mcount;
         struct kernel_param *kp;
         struct module *mod;
@@ -1957,9 +1955,6 @@ static noinline struct module *load_module(void __user *umod,
         versindex = find_sec(hdr, sechdrs, secstrings, "__versions");
         infoindex = find_sec(hdr, sechdrs, secstrings, ".modinfo");
         pcpuindex = find_pcpusec(hdr, sechdrs, secstrings);
-#ifdef ARCH_UNWIND_SECTION_NAME
-        unwindex = find_sec(hdr, sechdrs, secstrings, ARCH_UNWIND_SECTION_NAME);
-#endif
 
         /* Don't keep modinfo and version sections. */
         sechdrs[infoindex].sh_flags &= ~(unsigned long)SHF_ALLOC;
@@ -1969,8 +1964,6 @@ static noinline struct module *load_module(void __user *umod,
         sechdrs[symindex].sh_flags |= SHF_ALLOC;
         sechdrs[strindex].sh_flags |= SHF_ALLOC;
 #endif
-        if (unwindex)
-                sechdrs[unwindex].sh_flags |= SHF_ALLOC;
 
         /* Check module struct version now, before we try to use module. */
         if (!check_modstruct_version(sechdrs, versindex, mod)) {
@@ -2267,11 +2260,6 @@ static noinline struct module *load_module(void __user *umod,
         add_sect_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
         add_notes_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
 
-        /* Size of section 0 is 0, so this works well if no unwind info. */
-        mod->unwind_info = unwind_add_table(mod,
-                                            (void *)sechdrs[unwindex].sh_addr,
-                                            sechdrs[unwindex].sh_size);
-
         /* Get rid of temporary copy */
         vfree(hdr);
 
@@ -2366,11 +2354,12 @@ sys_init_module(void __user *umod,
         /* Now it's a first class citizen!  Wake up anyone waiting for it. */
         mod->state = MODULE_STATE_LIVE;
         wake_up(&module_wq);
+        blocking_notifier_call_chain(&module_notify_list,
+                                     MODULE_STATE_LIVE, mod);
 
         mutex_lock(&module_mutex);
         /* Drop initial reference. */
         module_put(mod);
-        unwind_remove_table(mod->unwind_info, 1);
         module_free(mod, mod->module_init);
         mod->module_init = NULL;
         mod->init_size = 0;
@@ -2405,7 +2394,7 @@ static const char *get_ksymbol(struct module *mod,
         unsigned long nextval;
 
         /* At worse, next value is at end of module */
-        if (within(addr, mod->module_init, mod->init_size))
+        if (within_module_init(addr, mod))
                 nextval = (unsigned long)mod->module_init+mod->init_text_size;
         else
                 nextval = (unsigned long)mod->module_core+mod->core_text_size;
@@ -2453,8 +2442,8 @@ const char *module_address_lookup(unsigned long addr,
 
         preempt_disable();
         list_for_each_entry_rcu(mod, &modules, list) {
-                if (within(addr, mod->module_init, mod->init_size)
-                    || within(addr, mod->module_core, mod->core_size)) {
+                if (within_module_init(addr, mod) ||
+                    within_module_core(addr, mod)) {
                         if (modname)
                                 *modname = mod->name;
                         ret = get_ksymbol(mod, addr, size, offset);
@@ -2476,8 +2465,8 @@ int lookup_module_symbol_name(unsigned long addr, char *symname)
 
         preempt_disable();
         list_for_each_entry_rcu(mod, &modules, list) {
-                if (within(addr, mod->module_init, mod->init_size) ||
-                    within(addr, mod->module_core, mod->core_size)) {
+                if (within_module_init(addr, mod) ||
+                    within_module_core(addr, mod)) {
                         const char *sym;
 
                         sym = get_ksymbol(mod, addr, NULL, NULL);
@@ -2500,8 +2489,8 @@ int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size,
 
         preempt_disable();
         list_for_each_entry_rcu(mod, &modules, list) {
-                if (within(addr, mod->module_init, mod->init_size) ||
-                    within(addr, mod->module_core, mod->core_size)) {
+                if (within_module_init(addr, mod) ||
+                    within_module_core(addr, mod)) {
                         const char *sym;
 
                         sym = get_ksymbol(mod, addr, size, offset);
@@ -2720,7 +2709,7 @@ int is_module_address(unsigned long addr)
         preempt_disable();
 
         list_for_each_entry_rcu(mod, &modules, list) {
-                if (within(addr, mod->module_core, mod->core_size)) {
+                if (within_module_core(addr, mod)) {
                         preempt_enable();
                         return 1;
                 }
diff --git a/kernel/panic.c b/kernel/panic.c
index 13f06349a786..2a2ff36ff44d 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -299,6 +299,8 @@ static int init_oops_id(void)
 {
         if (!oops_id)
                 get_random_bytes(&oops_id, sizeof(oops_id));
+        else
+                oops_id++;
 
         return 0;
 }
diff --git a/kernel/pid.c b/kernel/pid.c
index 064e76afa507..af9224cdd6c0 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -475,7 +475,7 @@ pid_t task_session_nr_ns(struct task_struct *tsk, struct pid_namespace *ns)
 EXPORT_SYMBOL(task_session_nr_ns);
 
 /*
- * Used by proc to find the first pid that is greater then or equal to nr.
+ * Used by proc to find the first pid that is greater than or equal to nr.
  *
  * If there is a pid at nr this function is exactly the same as find_pid_ns.
  */
diff --git a/kernel/power/main.c b/kernel/power/main.c
index 613f16941b85..239988873971 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -615,7 +615,7 @@ static void __init test_wakealarm(struct rtc_device *rtc, suspend_state_t state)
         /* this may fail if the RTC hasn't been initialized */
         status = rtc_read_time(rtc, &alm.time);
         if (status < 0) {
-                printk(err_readtime, rtc->dev.bus_id, status);
+                printk(err_readtime, dev_name(&rtc->dev), status);
                 return;
         }
         rtc_tm_to_time(&alm.time, &now);
@@ -626,7 +626,7 @@ static void __init test_wakealarm(struct rtc_device *rtc, suspend_state_t state)
 
         status = rtc_set_alarm(rtc, &alm);
         if (status < 0) {
-                printk(err_wakealarm, rtc->dev.bus_id, status);
+                printk(err_wakealarm, dev_name(&rtc->dev), status);
                 return;
         }
 
@@ -660,7 +660,7 @@ static int __init has_wakealarm(struct device *dev, void *name_ptr)
         if (!device_may_wakeup(candidate->dev.parent))
                 return 0;
 
-        *(char **)name_ptr = dev->bus_id;
+        *(const char **)name_ptr = dev_name(dev);
         return 1;
 }
 
diff --git a/kernel/printk.c b/kernel/printk.c
index e651ab05655f..7015733793e8 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -619,7 +619,7 @@ static int acquire_console_semaphore_for_printk(unsigned int cpu)
 static const char recursion_bug_msg [] =
                 KERN_CRIT "BUG: recent printk recursion!\n";
 static int recursion_bug;
-        static int new_text_line = 1;
+static int new_text_line = 1;
 static char printk_buf[1024];
 
 asmlinkage int vprintk(const char *fmt, va_list args)
diff --git a/kernel/profile.c b/kernel/profile.c
index d18e2d2654f2..784933acf5b8 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -445,7 +445,6 @@ void profile_tick(int type)
 #ifdef CONFIG_PROC_FS
 #include <linux/proc_fs.h>
 #include <asm/uaccess.h>
-#include <asm/ptrace.h>
 
 static int prof_cpu_mask_read_proc(char *page, char **start, off_t off,
                         int count, int *eof, void *data)
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index ad63af8b2521..d92a76a881aa 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -77,8 +77,15 @@ void wakeme_after_rcu(struct rcu_head  *head)
  * sections are delimited by rcu_read_lock() and rcu_read_unlock(),
  * and may be nested.
  */
-void synchronize_rcu(void);     /* Makes kernel-doc tools happy */
-synchronize_rcu_xxx(synchronize_rcu, call_rcu)
+void synchronize_rcu(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(synchronize_rcu);
 
 static void rcu_barrier_callback(struct rcu_head *notused)
diff --git a/kernel/rcupreempt.c b/kernel/rcupreempt.c
index f9dc8f3720f6..33cfc50781f9 100644
--- a/kernel/rcupreempt.c
+++ b/kernel/rcupreempt.c
@@ -1177,7 +1177,16 @@ EXPORT_SYMBOL_GPL(call_rcu_sched);
  * in -rt this does -not- necessarily result in all currently executing
  * interrupt -handlers- having completed.
  */
-synchronize_rcu_xxx(__synchronize_sched, call_rcu_sched)
+void __synchronize_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(__synchronize_sched);
 
 /*
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index 3245b40952c6..1cff28db56b6 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -136,7 +136,7 @@ static int stutter_pause_test = 0;
 #endif
 int rcutorture_runnable = RCUTORTURE_RUNNABLE_INIT;
 
-#define FULLSTOP_SIGNALED 1     /* Bail due to signal. */
+#define FULLSTOP_SHUTDOWN 1     /* Bail due to system shutdown/panic. */
 #define FULLSTOP_CLEANUP  2     /* Orderly shutdown. */
 static int fullstop;            /* stop generating callbacks at test end. */
 DEFINE_MUTEX(fullstop_mutex);   /* protect fullstop transitions and */
@@ -151,12 +151,10 @@ rcutorture_shutdown_notify(struct notifier_block *unused1,
 {
         if (fullstop)
                 return NOTIFY_DONE;
-        if (signal_pending(current)) {
-                mutex_lock(&fullstop_mutex);
-                if (!ACCESS_ONCE(fullstop))
-                        fullstop = FULLSTOP_SIGNALED;
-                mutex_unlock(&fullstop_mutex);
-        }
+        mutex_lock(&fullstop_mutex);
+        if (!fullstop)
+                fullstop = FULLSTOP_SHUTDOWN;
+        mutex_unlock(&fullstop_mutex);
         return NOTIFY_DONE;
 }
 
@@ -624,7 +622,7 @@ rcu_torture_writer(void *arg)
                 rcu_stutter_wait();
         } while (!kthread_should_stop() && !fullstop);
         VERBOSE_PRINTK_STRING("rcu_torture_writer task stopping");
-        while (!kthread_should_stop() && fullstop != FULLSTOP_SIGNALED)
+        while (!kthread_should_stop() && fullstop != FULLSTOP_SHUTDOWN)
                 schedule_timeout_uninterruptible(1);
         return 0;
 }
@@ -649,7 +647,7 @@ rcu_torture_fakewriter(void *arg)
         } while (!kthread_should_stop() && !fullstop);
 
         VERBOSE_PRINTK_STRING("rcu_torture_fakewriter task stopping");
-        while (!kthread_should_stop() && fullstop != FULLSTOP_SIGNALED)
+        while (!kthread_should_stop() && fullstop != FULLSTOP_SHUTDOWN)
                 schedule_timeout_uninterruptible(1);
         return 0;
 }
@@ -759,7 +757,7 @@ rcu_torture_reader(void *arg)
         VERBOSE_PRINTK_STRING("rcu_torture_reader task stopping");
         if (irqreader && cur_ops->irqcapable)
                 del_timer_sync(&t);
-        while (!kthread_should_stop() && fullstop != FULLSTOP_SIGNALED)
+        while (!kthread_should_stop() && fullstop != FULLSTOP_SHUTDOWN)
                 schedule_timeout_uninterruptible(1);
         return 0;
 }
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index a342b032112c..f2d8638e6c60 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -79,7 +79,10 @@ struct rcu_state rcu_bh_state = RCU_STATE_INITIALIZER(rcu_bh_state);
 DEFINE_PER_CPU(struct rcu_data, rcu_bh_data);
 
 #ifdef CONFIG_NO_HZ
-DEFINE_PER_CPU(struct rcu_dynticks, rcu_dynticks);
+DEFINE_PER_CPU(struct rcu_dynticks, rcu_dynticks) = {
+        .dynticks_nesting = 1,
+        .dynticks = 1,
+};
 #endif /* #ifdef CONFIG_NO_HZ */
 
 static int blimit = 10;         /* Maximum callbacks per softirq. */
@@ -572,6 +575,7 @@ rcu_start_gp(struct rcu_state *rsp, unsigned long flags)
         /* Special-case the common single-level case. */
         if (NUM_RCU_NODES == 1) {
                 rnp->qsmask = rnp->qsmaskinit;
+                rsp->signaled = RCU_SIGNAL_INIT; /* force_quiescent_state OK. */
                 spin_unlock_irqrestore(&rnp->lock, flags);
                 return;
         }
@@ -1379,13 +1383,6 @@ rcu_init_percpu_data(int cpu, struct rcu_state *rsp)
 
 static void __cpuinit rcu_online_cpu(int cpu)
 {
-#ifdef CONFIG_NO_HZ
-        struct rcu_dynticks *rdtp = &per_cpu(rcu_dynticks, cpu);
-
-        rdtp->dynticks_nesting = 1;
-        rdtp->dynticks |= 1;    /* need consecutive #s even for hotplug. */
-        rdtp->dynticks_nmi = (rdtp->dynticks_nmi + 1) & ~0x1;
-#endif /* #ifdef CONFIG_NO_HZ */
         rcu_init_percpu_data(cpu, &rcu_state);
         rcu_init_percpu_data(cpu, &rcu_bh_state);
         open_softirq(RCU_SOFTIRQ, rcu_process_callbacks);
diff --git a/kernel/resource.c b/kernel/resource.c
index e633106b12f6..ca6a1536b205 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -623,7 +623,7 @@ resource_size_t resource_alignment(struct resource *res)
  */
 struct resource * __request_region(struct resource *parent,
                                    resource_size_t start, resource_size_t n,
-                                   const char *name)
+                                   const char *name, int flags)
 {
         struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
 
@@ -634,6 +634,7 @@ struct resource * __request_region(struct resource *parent,
         res->start = start;
         res->end = start + n - 1;
         res->flags = IORESOURCE_BUSY;
+        res->flags |= flags;
 
         write_lock(&resource_lock);
 
@@ -679,7 +680,7 @@ int __check_region(struct resource *parent, resource_size_t start,
 {
         struct resource * res;
 
-        res = __request_region(parent, start, n, "check-region");
+        res = __request_region(parent, start, n, "check-region", 0);
         if (!res)
                 return -EBUSY;
 
@@ -776,7 +777,7 @@ struct resource * __devm_request_region(struct device *dev,
         dr->start = start;
         dr->n = n;
 
-        res = __request_region(parent, start, n, name);
+        res = __request_region(parent, start, n, name, 0);
         if (res)
                 devres_add(dev, dr);
         else
@@ -876,3 +877,57 @@ int iomem_map_sanity_check(resource_size_t addr, unsigned long size)
 
         return err;
 }
+
+#ifdef CONFIG_STRICT_DEVMEM
+static int strict_iomem_checks = 1;
+#else
+static int strict_iomem_checks;
+#endif
+
+/*
+ * check if an address is reserved in the iomem resource tree
+ * returns 1 if reserved, 0 if not reserved.
+ */
+int iomem_is_exclusive(u64 addr)
+{
+        struct resource *p = &iomem_resource;
+        int err = 0;
+        loff_t l;
+        int size = PAGE_SIZE;
+
+        if (!strict_iomem_checks)
+                return 0;
+
+        addr = addr & PAGE_MASK;
+
+        read_lock(&resource_lock);
+        for (p = p->child; p ; p = r_next(NULL, p, &l)) {
+                /*
+                 * We can probably skip the resources without
+                 * IORESOURCE_IO attribute?
+                 */
+                if (p->start >= addr + size)
+                        break;
+                if (p->end < addr)
+                        continue;
+                if (p->flags & IORESOURCE_BUSY &&
+                     p->flags & IORESOURCE_EXCLUSIVE) {
+                        err = 1;
+                        break;
+                }
+        }
+        read_unlock(&resource_lock);
+
+        return err;
+}
+
+static int __init strict_iomem(char *str)
+{
+        if (strstr(str, "relaxed"))
+                strict_iomem_checks = 0;
+        if (strstr(str, "strict"))
+                strict_iomem_checks = 1;
+        return 1;
+}
+
+__setup("iomem=", strict_iomem);
diff --git a/kernel/sched.c b/kernel/sched.c
index 545c6fccd1dc..deb5ac8c12f3 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3728,8 +3728,13 @@ redo:
                 }
 
                 double_unlock_balance(this_rq, busiest);
+                /*
+                 * Should not call ttwu while holding a rq->lock
+                 */
+                spin_unlock(&this_rq->lock);
                 if (active_balance)
                         wake_up_process(busiest->migration_thread);
+                spin_lock(&this_rq->lock);
 
         } else
                 sd->nr_balance_failed = 0;
@@ -6957,7 +6962,7 @@ static void rq_attach_root(struct rq *rq, struct root_domain *rd)
         spin_unlock_irqrestore(&rq->lock, flags);
 }
 
-static int init_rootdomain(struct root_domain *rd, bool bootmem)
+static int __init_refok init_rootdomain(struct root_domain *rd, bool bootmem)
 {
         memset(rd, 0, sizeof(*rd));
 
@@ -6970,7 +6975,7 @@ static int init_rootdomain(struct root_domain *rd, bool bootmem)
         }
 
         if (!alloc_cpumask_var(&rd->span, GFP_KERNEL))
-                goto free_rd;
+                goto out;
         if (!alloc_cpumask_var(&rd->online, GFP_KERNEL))
                 goto free_span;
         if (!alloc_cpumask_var(&rd->rto_mask, GFP_KERNEL))
@@ -6986,8 +6991,7 @@ free_online:
         free_cpumask_var(rd->online);
 free_span:
         free_cpumask_var(rd->span);
-free_rd:
-        kfree(rd);
+out:
         return -ENOMEM;
 }
 
@@ -7987,7 +7991,7 @@ match2:
 }
 
 #if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
-int arch_reinit_sched_domains(void)
+static void arch_reinit_sched_domains(void)
 {
         get_online_cpus();
 
@@ -7996,13 +8000,10 @@ int arch_reinit_sched_domains(void)
 
         rebuild_sched_domains();
         put_online_cpus();
-
-        return 0;
 }
 
 static ssize_t sched_power_savings_store(const char *buf, size_t count, int smt)
 {
-        int ret;
         unsigned int level = 0;
 
         if (sscanf(buf, "%u", &level) != 1)
@@ -8023,9 +8024,9 @@ static ssize_t sched_power_savings_store(const char *buf, size_t count, int smt)
         else
                 sched_mc_power_savings = level;
 
-        ret = arch_reinit_sched_domains();
+        arch_reinit_sched_domains();
 
-        return ret ? ret : count;
+        return count;
 }
 
 #ifdef CONFIG_SCHED_MC
@@ -8060,7 +8061,7 @@ static SYSDEV_CLASS_ATTR(sched_smt_power_savings, 0644,
                    sched_smt_power_savings_store);
 #endif
 
-int sched_create_sysfs_power_savings_entries(struct sysdev_class *cls)
+int __init sched_create_sysfs_power_savings_entries(struct sysdev_class *cls)
 {
         int err = 0;
 
diff --git a/kernel/sched_clock.c b/kernel/sched_clock.c
index e8ab096ddfe3..a0b0852414cc 100644
--- a/kernel/sched_clock.c
+++ b/kernel/sched_clock.c
@@ -124,7 +124,7 @@ static u64 __update_sched_clock(struct sched_clock_data *scd, u64 now)
 
         clock = scd->tick_gtod + delta;
         min_clock = wrap_max(scd->tick_gtod, scd->clock);
-        max_clock = scd->tick_gtod + TICK_NSEC;
+        max_clock = wrap_max(scd->clock, scd->tick_gtod + TICK_NSEC);
 
         clock = wrap_max(clock, min_clock);
         clock = wrap_min(clock, max_clock);
@@ -227,6 +227,9 @@ EXPORT_SYMBOL_GPL(sched_clock_idle_sleep_event);
  */
 void sched_clock_idle_wakeup_event(u64 delta_ns)
 {
+        if (timekeeping_suspended)
+                return;
+
         sched_clock_tick();
         touch_softlockup_watchdog();
 }
diff --git a/kernel/sched_cpupri.c b/kernel/sched_cpupri.c
index 018b7be1db2e..1e00bfacf9b8 100644
--- a/kernel/sched_cpupri.c
+++ b/kernel/sched_cpupri.c
@@ -151,7 +151,7 @@ void cpupri_set(struct cpupri *cp, int cpu, int newpri)
  *
  * Returns: -ENOMEM if memory fails.
  */
-int cpupri_init(struct cpupri *cp, bool bootmem)
+int __init_refok cpupri_init(struct cpupri *cp, bool bootmem)
 {
         int i;
 
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 56c0efe902a7..e0c0b4bc3f08 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -386,20 +386,6 @@ int sched_nr_latency_handler(struct ctl_table *table, int write,
 #endif
 
 /*
- * delta *= P[w / rw]
- */
-static inline unsigned long
-calc_delta_weight(unsigned long delta, struct sched_entity *se)
-{
-        for_each_sched_entity(se) {
-                delta = calc_delta_mine(delta,
-                                se->load.weight, &cfs_rq_of(se)->load);
-        }
-
-        return delta;
-}
-
-/*
  * delta /= w
  */
 static inline unsigned long
@@ -440,12 +426,20 @@ static u64 __sched_period(unsigned long nr_running)
  */
 static u64 sched_slice(struct cfs_rq *cfs_rq, struct sched_entity *se)
 {
-        unsigned long nr_running = cfs_rq->nr_running;
+        u64 slice = __sched_period(cfs_rq->nr_running + !se->on_rq);
 
-        if (unlikely(!se->on_rq))
-                nr_running++;
+        for_each_sched_entity(se) {
+                struct load_weight *load = &cfs_rq->load;
 
-        return calc_delta_weight(__sched_period(nr_running), se);
+                if (unlikely(!se->on_rq)) {
+                        struct load_weight lw = cfs_rq->load;
+
+                        update_load_add(&lw, se->load.weight);
+                        load = &lw;
+                }
+                slice = calc_delta_mine(slice, se->load.weight, load);
+        }
+        return slice;
 }
 
 /*
diff --git a/kernel/signal.c b/kernel/signal.c
index 8e95855ff3cf..3152ac3b62e2 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -858,7 +858,8 @@ static int send_signal(int sig, struct siginfo *info, struct task_struct *t,
                         q->info.si_signo = sig;
                         q->info.si_errno = 0;
                         q->info.si_code = SI_USER;
-                        q->info.si_pid = task_pid_vnr(current);
+                        q->info.si_pid = task_tgid_nr_ns(current,
+                                                        task_active_pid_ns(t));
                         q->info.si_uid = current_uid();
                         break;
                 case (unsigned long) SEND_SIG_PRIV:
diff --git a/kernel/sys.c b/kernel/sys.c
index d356d79e84ac..763c3c17ded3 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -33,6 +33,7 @@
 #include <linux/task_io_accounting_ops.h>
 #include <linux/seccomp.h>
 #include <linux/cpu.h>
+#include <linux/ptrace.h>
 
 #include <linux/compat.h>
 #include <linux/syscalls.h>
@@ -927,6 +928,7 @@ asmlinkage long sys_times(struct tms __user * tbuf)
                 if (copy_to_user(tbuf, &tmp, sizeof(struct tms)))
                         return -EFAULT;
         }
+        force_successful_syscall_return();
         return (long) jiffies_64_to_clock_t(get_jiffies_64());
 }
 
@@ -1627,6 +1629,8 @@ static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
         utime = stime = cputime_zero;
 
         if (who == RUSAGE_THREAD) {
+                utime = task_utime(current);
+                stime = task_stime(current);
                 accumulate_thread_rusage(p, r);
                 goto out;
         }
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index ff6d45c7626f..92f6e5bc3c24 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -87,10 +87,6 @@ extern int rcutorture_runnable;
 #endif /* #ifdef CONFIG_RCU_TORTURE_TEST */
 
 /* Constants used for minimum and  maximum */
-#if defined(CONFIG_HIGHMEM) || defined(CONFIG_DETECT_SOFTLOCKUP)
-static int one = 1;
-#endif
-
 #ifdef CONFIG_DETECT_SOFTLOCKUP
 static int sixty = 60;
 static int neg_one = -1;
@@ -101,6 +97,7 @@ static int two = 2;
 #endif
 
 static int zero;
+static int one = 1;
 static int one_hundred = 100;
 
 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
@@ -952,12 +949,22 @@ static struct ctl_table vm_table[] = {
                 .data           = &dirty_background_ratio,
                 .maxlen         = sizeof(dirty_background_ratio),
                 .mode           = 0644,
-                .proc_handler   = &proc_dointvec_minmax,
+                .proc_handler   = &dirty_background_ratio_handler,
                 .strategy       = &sysctl_intvec,
                 .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,
+                .extra1         = &one,
+        },
+        {
                 .ctl_name       = VM_DIRTY_RATIO,
                 .procname       = "dirty_ratio",
                 .data           = &vm_dirty_ratio,
@@ -969,6 +976,16 @@ static struct ctl_table vm_table[] = {
                 .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,
+                .extra1         = &one,
+        },
+        {
                 .procname       = "dirty_writeback_centisecs",
                 .data           = &dirty_writeback_interval,
                 .maxlen         = sizeof(dirty_writeback_interval),
diff --git a/kernel/test_kprobes.c b/kernel/test_kprobes.c
index 06b6395b45b2..4f104515a19b 100644
--- a/kernel/test_kprobes.c
+++ b/kernel/test_kprobes.c
@@ -22,21 +22,11 @@
 
 static u32 rand1, preh_val, posth_val, jph_val;
 static int errors, handler_errors, num_tests;
+static u32 (*target)(u32 value);
+static u32 (*target2)(u32 value);
 
 static noinline u32 kprobe_target(u32 value)
 {
-        /*
-         * gcc ignores noinline on some architectures unless we stuff
-         * sufficient lard into the function. The get_kprobe() here is
-         * just for that.
-         *
-         * NOTE: We aren't concerned about the correctness of get_kprobe()
-         * here; hence, this call is neither under !preempt nor with the
-         * kprobe_mutex held. This is fine(tm)
-         */
-        if (get_kprobe((void *)0xdeadbeef))
-                printk(KERN_INFO "Kprobe smoke test: probe on 0xdeadbeef!\n");
-
         return (value / div_factor);
 }
 
@@ -74,7 +64,7 @@ static int test_kprobe(void)
                 return ret;
         }
 
-        ret = kprobe_target(rand1);
+        ret = target(rand1);
         unregister_kprobe(&kp);
 
         if (preh_val == 0) {
@@ -92,6 +82,84 @@ static int test_kprobe(void)
         return 0;
 }
 
+static noinline u32 kprobe_target2(u32 value)
+{
+        return (value / div_factor) + 1;
+}
+
+static int kp_pre_handler2(struct kprobe *p, struct pt_regs *regs)
+{
+        preh_val = (rand1 / div_factor) + 1;
+        return 0;
+}
+
+static void kp_post_handler2(struct kprobe *p, struct pt_regs *regs,
+                unsigned long flags)
+{
+        if (preh_val != (rand1 / div_factor) + 1) {
+                handler_errors++;
+                printk(KERN_ERR "Kprobe smoke test failed: "
+                                "incorrect value in post_handler2\n");
+        }
+        posth_val = preh_val + div_factor;
+}
+
+static struct kprobe kp2 = {
+        .symbol_name = "kprobe_target2",
+        .pre_handler = kp_pre_handler2,
+        .post_handler = kp_post_handler2
+};
+
+static int test_kprobes(void)
+{
+        int ret;
+        struct kprobe *kps[2] = {&kp, &kp2};
+
+        kp.addr = 0; /* addr should be cleard for reusing kprobe. */
+        ret = register_kprobes(kps, 2);
+        if (ret < 0) {
+                printk(KERN_ERR "Kprobe smoke test failed: "
+                                "register_kprobes returned %d\n", ret);
+                return ret;
+        }
+
+        preh_val = 0;
+        posth_val = 0;
+        ret = target(rand1);
+
+        if (preh_val == 0) {
+                printk(KERN_ERR "Kprobe smoke test failed: "
+                                "kprobe pre_handler not called\n");
+                handler_errors++;
+        }
+
+        if (posth_val == 0) {
+                printk(KERN_ERR "Kprobe smoke test failed: "
+                                "kprobe post_handler not called\n");
+                handler_errors++;
+        }
+
+        preh_val = 0;
+        posth_val = 0;
+        ret = target2(rand1);
+
+        if (preh_val == 0) {
+                printk(KERN_ERR "Kprobe smoke test failed: "
+                                "kprobe pre_handler2 not called\n");
+                handler_errors++;
+        }
+
+        if (posth_val == 0) {
+                printk(KERN_ERR "Kprobe smoke test failed: "
+                                "kprobe post_handler2 not called\n");
+                handler_errors++;
+        }
+
+        unregister_kprobes(kps, 2);
+        return 0;
+
+}
+
 static u32 j_kprobe_target(u32 value)
 {
         if (value != rand1) {
@@ -121,7 +189,7 @@ static int test_jprobe(void)
                 return ret;
         }
 
-        ret = kprobe_target(rand1);
+        ret = target(rand1);
         unregister_jprobe(&jp);
         if (jph_val == 0) {
                 printk(KERN_ERR "Kprobe smoke test failed: "
@@ -132,6 +200,43 @@ static int test_jprobe(void)
         return 0;
 }
 
+static struct jprobe jp2 = {
+        .entry          = j_kprobe_target,
+        .kp.symbol_name = "kprobe_target2"
+};
+
+static int test_jprobes(void)
+{
+        int ret;
+        struct jprobe *jps[2] = {&jp, &jp2};
+
+        jp.kp.addr = 0; /* addr should be cleard for reusing kprobe. */
+        ret = register_jprobes(jps, 2);
+        if (ret < 0) {
+                printk(KERN_ERR "Kprobe smoke test failed: "
+                                "register_jprobes returned %d\n", ret);
+                return ret;
+        }
+
+        jph_val = 0;
+        ret = target(rand1);
+        if (jph_val == 0) {
+                printk(KERN_ERR "Kprobe smoke test failed: "
+                                "jprobe handler not called\n");
+                handler_errors++;
+        }
+
+        jph_val = 0;
+        ret = target2(rand1);
+        if (jph_val == 0) {
+                printk(KERN_ERR "Kprobe smoke test failed: "
+                                "jprobe handler2 not called\n");
+                handler_errors++;
+        }
+        unregister_jprobes(jps, 2);
+
+        return 0;
+}
 #ifdef CONFIG_KRETPROBES
 static u32 krph_val;
 
@@ -177,7 +282,7 @@ static int test_kretprobe(void)
                 return ret;
         }
 
-        ret = kprobe_target(rand1);
+        ret = target(rand1);
         unregister_kretprobe(&rp);
         if (krph_val != rand1) {
                 printk(KERN_ERR "Kprobe smoke test failed: "
@@ -187,12 +292,72 @@ static int test_kretprobe(void)
 
         return 0;
 }
+
+static int return_handler2(struct kretprobe_instance *ri, struct pt_regs *regs)
+{
+        unsigned long ret = regs_return_value(regs);
+
+        if (ret != (rand1 / div_factor) + 1) {
+                handler_errors++;
+                printk(KERN_ERR "Kprobe smoke test failed: "
+                                "incorrect value in kretprobe handler2\n");
+        }
+        if (krph_val == 0) {
+                handler_errors++;
+                printk(KERN_ERR "Kprobe smoke test failed: "
+                                "call to kretprobe entry handler failed\n");
+        }
+
+        krph_val = rand1;
+        return 0;
+}
+
+static struct kretprobe rp2 = {
+        .handler        = return_handler2,
+        .entry_handler  = entry_handler,
+        .kp.symbol_name = "kprobe_target2"
+};
+
+static int test_kretprobes(void)
+{
+        int ret;
+        struct kretprobe *rps[2] = {&rp, &rp2};
+
+        rp.kp.addr = 0; /* addr should be cleard for reusing kprobe. */
+        ret = register_kretprobes(rps, 2);
+        if (ret < 0) {
+                printk(KERN_ERR "Kprobe smoke test failed: "
+                                "register_kretprobe returned %d\n", ret);
+                return ret;
+        }
+
+        krph_val = 0;
+        ret = target(rand1);
+        if (krph_val != rand1) {
+                printk(KERN_ERR "Kprobe smoke test failed: "
+                                "kretprobe handler not called\n");
+                handler_errors++;
+        }
+
+        krph_val = 0;
+        ret = target2(rand1);
+        if (krph_val != rand1) {
+                printk(KERN_ERR "Kprobe smoke test failed: "
+                                "kretprobe handler2 not called\n");
+                handler_errors++;
+        }
+        unregister_kretprobes(rps, 2);
+        return 0;
+}
 #endif /* CONFIG_KRETPROBES */
 
 int init_test_probes(void)
 {
         int ret;
 
+        target = kprobe_target;
+        target2 = kprobe_target2;
+
         do {
                 rand1 = random32();
         } while (rand1 <= div_factor);
@@ -204,15 +369,30 @@ int init_test_probes(void)
                 errors++;
 
         num_tests++;
+        ret = test_kprobes();
+        if (ret < 0)
+                errors++;
+
+        num_tests++;
         ret = test_jprobe();
         if (ret < 0)
                 errors++;
 
+        num_tests++;
+        ret = test_jprobes();
+        if (ret < 0)
+                errors++;
+
 #ifdef CONFIG_KRETPROBES
         num_tests++;
         ret = test_kretprobe();
         if (ret < 0)
                 errors++;
+
+        num_tests++;
+        ret = test_kretprobes();
+        if (ret < 0)
+                errors++;
 #endif /* CONFIG_KRETPROBES */
 
         if (errors)
diff --git a/kernel/time.c b/kernel/time.c
index d63a4336fad6..4886e3ce83a4 100644
--- a/kernel/time.c
+++ b/kernel/time.c
@@ -37,6 +37,7 @@
 #include <linux/fs.h>
 #include <linux/slab.h>
 #include <linux/math64.h>
+#include <linux/ptrace.h>
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -65,8 +66,9 @@ asmlinkage long sys_time(time_t __user * tloc)
 
         if (tloc) {
                 if (put_user(i,tloc))
-                        i = -EFAULT;
+                        return -EFAULT;
         }
+        force_successful_syscall_return();
         return i;
 }
 
diff --git a/kernel/time/jiffies.c b/kernel/time/jiffies.c
index 1ca99557e929..06f197560f3b 100644
--- a/kernel/time/jiffies.c
+++ b/kernel/time/jiffies.c
@@ -45,7 +45,7 @@
  *
  * The value 8 is somewhat carefully chosen, as anything
  * larger can result in overflows. NSEC_PER_JIFFY grows as
- * HZ shrinks, so values greater then 8 overflow 32bits when
+ * HZ shrinks, so values greater than 8 overflow 32bits when
  * HZ=100.
  */
 #define JIFFIES_SHIFT   8
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index fa05e88aa76f..900f1b6598d1 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -46,6 +46,9 @@ struct timespec xtime __attribute__ ((aligned (16)));
 struct timespec wall_to_monotonic __attribute__ ((aligned (16)));
 static unsigned long total_sleep_time;          /* seconds */
 
+/* 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)
 {
@@ -92,6 +95,8 @@ void getnstimeofday(struct timespec *ts)
         unsigned long seq;
         s64 nsecs;
 
+        WARN_ON(timekeeping_suspended);
+
         do {
                 seq = read_seqbegin(&xtime_lock);
 
@@ -299,8 +304,6 @@ void __init timekeeping_init(void)
         write_sequnlock_irqrestore(&xtime_lock, flags);
 }
 
-/* flag for if timekeeping is suspended */
-static int timekeeping_suspended;
 /* time in seconds when suspend began */
 static unsigned long timekeeping_suspend_time;
 
diff --git a/kernel/tsacct.c b/kernel/tsacct.c
index 2dc06ab35716..43f891b05a4b 100644
--- a/kernel/tsacct.c
+++ b/kernel/tsacct.c
@@ -92,8 +92,8 @@ void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
         mm = get_task_mm(p);
         if (mm) {
                 /* adjust to KB unit */
-                stats->hiwater_rss   = mm->hiwater_rss * PAGE_SIZE / KB;
-                stats->hiwater_vm    = mm->hiwater_vm * PAGE_SIZE / KB;
+                stats->hiwater_rss   = get_mm_hiwater_rss(mm) * PAGE_SIZE / KB;
+                stats->hiwater_vm    = get_mm_hiwater_vm(mm)  * PAGE_SIZE / KB;
                 mmput(mm);
         }
         stats->read_char        = p->ioac.rchar;