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Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull scheduler fixes from Ingo Molnar:
 "Two fixes: one for a lost wakeup, the other to fix the compiler
  optimizing out preempt operations on ARM64 (and possibly other non-x86
  architectures)"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/core: Fix remote wakeups
  sched/preempt: Fix preempt_count manipulations
This commit is contained in:
Linus Torvalds
2016-05-25 17:11:43 -07:00
parent bdc6b758e4 b7e7ade34e
commit f89eae4ee7
3 changed files with 14 additions and 9 deletions
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4
include/asm-generic/preempt.h
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@@ -7,10 +7,10 @@
static __always_inline int preempt_count(void)
{
return current_thread_info()->preempt_count;
return READ_ONCE(current_thread_info()->preempt_count);
}
static __always_inline int *preempt_count_ptr(void)
static __always_inline volatile int *preempt_count_ptr(void)
{
return &current_thread_info()->preempt_count;
}