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| author | Peter Zijlstra <peterz@infradead.org> | 2013-11-20 12:22:37 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-01-13 17:38:55 +0100 |
| commit | 8cb75e0c4ec9786b81439761eac1d18d4a931af3 (patch) | |
| tree | 9d13e6c3580a36cd76d1b3a96827795949519409 /arch/x86/include/asm/mwait.h | |
| parent | c9c8986847d2f4fc474c10ee08afa57e7474096d (diff) | |
| download | linux-0-day-8cb75e0c4ec9786b81439761eac1d18d4a931af3.tar.gz linux-0-day-8cb75e0c4ec9786b81439761eac1d18d4a931af3.tar.xz | |
sched/preempt: Fix up missed PREEMPT_NEED_RESCHED folding
With various drivers wanting to inject idle time; we get people
calling idle routines outside of the idle loop proper.
Therefore we need to be extra careful about not missing
TIF_NEED_RESCHED -> PREEMPT_NEED_RESCHED propagations.
While looking at this, I also realized there's a small window in the
existing idle loop where we can miss TIF_NEED_RESCHED; when it hits
right after the tif_need_resched() test at the end of the loop but
right before the need_resched() test at the start of the loop.
So move preempt_fold_need_resched() out of the loop where we're
guaranteed to have TIF_NEED_RESCHED set.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-x9jgh45oeayzajz2mjt0y7d6@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/mwait.h')
| -rw-r--r-- | arch/x86/include/asm/mwait.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/mwait.h b/arch/x86/include/asm/mwait.h index 19b71c439256e..1da25a5f96f92 100644 --- a/arch/x86/include/asm/mwait.h +++ b/arch/x86/include/asm/mwait.h @@ -53,7 +53,7 @@ static inline void mwait_idle_with_hints(unsigned long eax, unsigned long ecx) if (!need_resched()) __mwait(eax, ecx); } - __current_clr_polling(); + current_clr_polling(); } #endif /* _ASM_X86_MWAIT_H */ |