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

Pull scheduler fix from Thomas Gleixner:
 "A revert of a commit which pointelessly widened a preempt disabled
  section which in turn caused might_sleep() to trigger.

  The patch intended to prevent usage of smp_processor_id() in
  preemptible context, but the usage in that case is fine because the
  thread is pinned on a single cpu and therefore cannot be migrated off"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  Revert "sched/core: Do not use smp_processor_id() with preempt enabled in smpboot_thread_fn()"
This commit is contained in:
Linus Torvalds 2016-10-10 10:29:59 -07:00
parent daba2b314a be6a2e4c46
commit 84ed2da02f
1 changed files with 1 additions and 1 deletions
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2
kernel/smpboot.c
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@ -122,12 +122,12 @@ static int smpboot_thread_fn(void *data)
if (kthread_should_park()) {
__set_current_state(TASK_RUNNING);
preempt_enable();
if (ht->park && td->status == HP_THREAD_ACTIVE) {
BUG_ON(td->cpu != smp_processor_id());
ht->park(td->cpu);
td->status = HP_THREAD_PARKED;
}
preempt_enable();
kthread_parkme();
/* We might have been woken for stop */
continue;