13 files changed, 50 insertions, 37 deletions

diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 5a737ed9dac7..7430640f9816 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1809,11 +1809,12 @@ int cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask)
         if (gfp_mask & __GFP_HARDWALL)  /* If hardwall request, stop here */
                 return 0;
 
+        if (current->flags & PF_EXITING) /* Let dying task have memory */
+                return 1;
+
         /* Not hardwall and node outside mems_allowed: scan up cpusets */
         down(&callback_sem);
 
-        if (current->flags & PF_EXITING) /* Let dying task have memory */
-                return 1;
         task_lock(current);
         cs = nearest_exclusive_ancestor(current->cpuset);
         task_unlock(current);
diff --git a/kernel/exit.c b/kernel/exit.c
index 452a1d116178..ee515683b92d 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -859,7 +859,7 @@ fastcall NORET_TYPE void do_exit(long code)
         if (group_dead && tsk->signal->leader)
                 disassociate_ctty(1);
 
-        module_put(tsk->thread_info->exec_domain->module);
+        module_put(task_thread_info(tsk)->exec_domain->module);
         if (tsk->binfmt)
                 module_put(tsk->binfmt->module);
 
diff --git a/kernel/fork.c b/kernel/fork.c
index 158710d22566..e0d0b77343f8 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -171,10 +171,9 @@ static struct task_struct *dup_task_struct(struct task_struct *orig)
                 return NULL;
         }
 
-        *ti = *orig->thread_info;
         *tsk = *orig;
         tsk->thread_info = ti;
-        ti->task = tsk;
+        setup_thread_stack(tsk, orig);
 
         /* One for us, one for whoever does the "release_task()" (usually parent) */
         atomic_set(&tsk->usage,2);
@@ -324,7 +323,6 @@ static struct mm_struct * mm_init(struct mm_struct * mm)
         spin_lock_init(&mm->page_table_lock);
         rwlock_init(&mm->ioctx_list_lock);
         mm->ioctx_list = NULL;
-        mm->default_kioctx = (struct kioctx)INIT_KIOCTX(mm->default_kioctx, *mm);
         mm->free_area_cache = TASK_UNMAPPED_BASE;
         mm->cached_hole_size = ~0UL;
 
@@ -919,7 +917,7 @@ static task_t *copy_process(unsigned long clone_flags,
         if (nr_threads >= max_threads)
                 goto bad_fork_cleanup_count;
 
-        if (!try_module_get(p->thread_info->exec_domain->module))
+        if (!try_module_get(task_thread_info(p)->exec_domain->module))
                 goto bad_fork_cleanup_count;
 
         if (p->binfmt && !try_module_get(p->binfmt->module))
@@ -1180,7 +1178,7 @@ bad_fork_cleanup:
         if (p->binfmt)
                 module_put(p->binfmt->module);
 bad_fork_cleanup_put_domain:
-        module_put(p->thread_info->exec_domain->module);
+        module_put(task_thread_info(p)->exec_domain->module);
 bad_fork_cleanup_count:
         put_group_info(p->group_info);
         atomic_dec(&p->user->processes);
diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index ea55c7a1cd75..5870efb3e200 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -270,7 +270,7 @@ static void tstojiffie(struct timespec *tp, int res, u64 *jiff)
         long sec = tp->tv_sec;
         long nsec = tp->tv_nsec + res - 1;
 
-        if (nsec > NSEC_PER_SEC) {
+        if (nsec >= NSEC_PER_SEC) {
                 sec++;
                 nsec -= NSEC_PER_SEC;
         }
@@ -1209,13 +1209,9 @@ static int do_posix_clock_monotonic_get(clockid_t clock, struct timespec *tp)
 
         do_posix_clock_monotonic_gettime_parts(tp, &wall_to_mono);
 
-        tp->tv_sec += wall_to_mono.tv_sec;
-        tp->tv_nsec += wall_to_mono.tv_nsec;
+        set_normalized_timespec(tp, tp->tv_sec + wall_to_mono.tv_sec,
+                                tp->tv_nsec + wall_to_mono.tv_nsec);
 
-        if ((tp->tv_nsec - NSEC_PER_SEC) > 0) {
-                tp->tv_nsec -= NSEC_PER_SEC;
-                tp->tv_sec++;
-        }
         return 0;
 }
 
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 46a5e5acff97..5ec248cb7f4a 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -19,6 +19,15 @@ config PM
           will issue the hlt instruction if nothing is to be done, thereby
           sending the processor to sleep and saving power.
 
+config PM_LEGACY
+        bool "Legacy Power Management API"
+        depends on PM
+        default y
+        ---help---
+           Support for pm_register() and friends.
+
+           If unsure, say Y.
+
 config PM_DEBUG
         bool "Power Management Debug Support"
         depends on PM
diff --git a/kernel/power/Makefile b/kernel/power/Makefile
index c71eb4579c07..04be7d0d96a7 100644
--- a/kernel/power/Makefile
+++ b/kernel/power/Makefile
@@ -3,7 +3,8 @@ ifeq ($(CONFIG_PM_DEBUG),y)
 EXTRA_CFLAGS    +=      -DDEBUG
 endif
 
-obj-y                           := main.o process.o console.o pm.o
+obj-y                           := main.o process.o console.o
+obj-$(CONFIG_PM_LEGACY)         += pm.o
 obj-$(CONFIG_SOFTWARE_SUSPEND)  += swsusp.o disk.o snapshot.o
 
 obj-$(CONFIG_SUSPEND_SMP)       += smp.o
diff --git a/kernel/power/pm.c b/kernel/power/pm.c
index 159149321b3c..33c508e857dd 100644
--- a/kernel/power/pm.c
+++ b/kernel/power/pm.c
@@ -23,6 +23,7 @@
 #include <linux/mm.h>
 #include <linux/slab.h>
 #include <linux/pm.h>
+#include <linux/pm_legacy.h>
 #include <linux/interrupt.h>
 
 int pm_active;
diff --git a/kernel/printk.c b/kernel/printk.c
index e9be027bc930..ac8a08f36207 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -491,7 +491,10 @@ __attribute__((weak)) unsigned long long printk_clock(void)
         return sched_clock();
 }
 
-/*
+/**
+ * printk - print a kernel message
+ * @fmt: format string
+ *
  * This is printk.  It can be called from any context.  We want it to work.
  *
  * We try to grab the console_sem.  If we succeed, it's easy - we log the output and
@@ -503,6 +506,9 @@ __attribute__((weak)) unsigned long long printk_clock(void)
  * One effect of this deferred printing is that code which calls printk() and
  * then changes console_loglevel may break. This is because console_loglevel
  * is inspected when the actual printing occurs.
+ *
+ * See also:
+ * printf(3)
  */
 
 asmlinkage int printk(const char *fmt, ...)
@@ -655,6 +661,9 @@ static void call_console_drivers(unsigned long start, unsigned long end)
 
 /**
  * add_preferred_console - add a device to the list of preferred consoles.
+ * @name: device name
+ * @idx: device index
+ * @options: options for this console
  *
  * The last preferred console added will be used for kernel messages
  * and stdin/out/err for init.  Normally this is used by console_setup
@@ -764,7 +773,8 @@ void release_console_sem(void)
 }
 EXPORT_SYMBOL(release_console_sem);
 
-/** console_conditional_schedule - yield the CPU if required
+/**
+ * console_conditional_schedule - yield the CPU if required
  *
  * If the console code is currently allowed to sleep, and
  * if this CPU should yield the CPU to another task, do
@@ -976,6 +986,8 @@ EXPORT_SYMBOL(unregister_console);
 
 /**
  * tty_write_message - write a message to a certain tty, not just the console.
+ * @tty: the destination tty_struct
+ * @msg: the message to write
  *
  * This is used for messages that need to be redirected to a specific tty.
  * We don't put it into the syslog queue right now maybe in the future if
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index b88d4186cd7a..17ee7e5a3451 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -470,7 +470,7 @@ asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
 
         if (request == PTRACE_ATTACH) {
                 ret = ptrace_attach(child);
-                goto out;
+                goto out_put_task_struct;
         }
 
         ret = ptrace_check_attach(child, request == PTRACE_KILL);
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index 9b58f1eff3ca..eb6719c50b4e 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -195,6 +195,8 @@ rcu_torture_writer(void *arg)
         static DEFINE_RCU_RANDOM(rand);
 
         VERBOSE_PRINTK_STRING("rcu_torture_writer task started");
+        set_user_nice(current, 19);
+
         do {
                 schedule_timeout_uninterruptible(1);
                 if (rcu_batches_completed() == oldbatch)
@@ -238,6 +240,8 @@ rcu_torture_reader(void *arg)
         int pipe_count;
 
         VERBOSE_PRINTK_STRING("rcu_torture_reader task started");
+        set_user_nice(current, 19);
+
         do {
                 rcu_read_lock();
                 completed = rcu_batches_completed();
diff --git a/kernel/sched.c b/kernel/sched.c
index b6506671b2be..6f46c94cc29e 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1437,7 +1437,7 @@ void fastcall sched_fork(task_t *p, int clone_flags)
 #endif
 #ifdef CONFIG_PREEMPT
         /* Want to start with kernel preemption disabled. */
-        p->thread_info->preempt_count = 1;
+        task_thread_info(p)->preempt_count = 1;
 #endif
         /*
          * Share the timeslice between parent and child, thus the
@@ -4327,10 +4327,10 @@ static void show_task(task_t *p)
 #endif
 #ifdef CONFIG_DEBUG_STACK_USAGE
         {
-                unsigned long *n = (unsigned long *) (p->thread_info+1);
+                unsigned long *n = end_of_stack(p);
                 while (!*n)
                         n++;
-                free = (unsigned long) n - (unsigned long)(p->thread_info+1);
+                free = (unsigned long)n - (unsigned long)end_of_stack(p);
         }
 #endif
         printk("%5lu %5d %6d ", free, p->pid, p->parent->pid);
@@ -4410,9 +4410,9 @@ void __devinit init_idle(task_t *idle, int cpu)
 
         /* Set the preempt count _outside_ the spinlocks! */
 #if defined(CONFIG_PREEMPT) && !defined(CONFIG_PREEMPT_BKL)
-        idle->thread_info->preempt_count = (idle->lock_depth >= 0);
+        task_thread_info(idle)->preempt_count = (idle->lock_depth >= 0);
 #else
-        idle->thread_info->preempt_count = 0;
+        task_thread_info(idle)->preempt_count = 0;
 #endif
 }
 
diff --git a/kernel/signal.c b/kernel/signal.c
index 80789a59b4db..d7611f189ef7 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -513,16 +513,7 @@ static int __dequeue_signal(struct sigpending *pending, sigset_t *mask,
 {
         int sig = 0;
 
-        /* SIGKILL must have priority, otherwise it is quite easy
-         * to create an unkillable process, sending sig < SIGKILL
-         * to self */
-        if (unlikely(sigismember(&pending->signal, SIGKILL))) {
-                if (!sigismember(mask, SIGKILL))
-                        sig = SIGKILL;
-        }
-
-        if (likely(!sig))
-                sig = next_signal(pending, mask);
+        sig = next_signal(pending, mask);
         if (sig) {
                 if (current->notifier) {
                         if (sigismember(current->notifier_mask, sig)) {
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index 84a9d18aa8da..b3d4dc858e35 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -119,13 +119,12 @@ static int stop_machine(void)
                 return ret;
         }
 
-        /* Don't schedule us away at this point, please. */
-        local_irq_disable();
-
         /* Now they are all started, make them hold the CPUs, ready. */
+        preempt_disable();
         stopmachine_set_state(STOPMACHINE_PREPARE);
 
         /* Make them disable irqs. */
+        local_irq_disable();
         stopmachine_set_state(STOPMACHINE_DISABLE_IRQ);
 
         return 0;
@@ -135,6 +134,7 @@ static void restart_machine(void)
 {
         stopmachine_set_state(STOPMACHINE_EXIT);
         local_irq_enable();
+        preempt_enable_no_resched();
 }
 
 struct stop_machine_data