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| author | Peter Zijlstra | 2016-09-19 12:57:53 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2016-09-22 14:53:46 +0200 |
| commit | 35a773a07926a22bf19d77ee00024522279c4e68 (patch) | |
| tree | 23f24c6a2932df3cb5078e438abbfb1966e4733b /kernel/sched/core.c | |
| parent | sched/core: Optimize __schedule() (diff) | |
| download | kernel-qcow2-linux-35a773a07926a22bf19d77ee00024522279c4e68.tar.gz kernel-qcow2-linux-35a773a07926a22bf19d77ee00024522279c4e68.tar.xz kernel-qcow2-linux-35a773a07926a22bf19d77ee00024522279c4e68.zip | |
sched/core: Avoid _cond_resched() for PREEMPT=y
On fully preemptible kernels _cond_resched() is pointless, so avoid
emitting any code for it.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/core.c')
| -rw-r--r-- | kernel/sched/core.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index b2ec53c1a974..d7babcc7cb76 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -4883,6 +4883,7 @@ SYSCALL_DEFINE0(sched_yield) return 0; } +#ifndef CONFIG_PREEMPT int __sched _cond_resched(void) { if (should_resched(0)) { @@ -4892,6 +4893,7 @@ int __sched _cond_resched(void) return 0; } EXPORT_SYMBOL(_cond_resched); +#endif /* * __cond_resched_lock() - if a reschedule is pending, drop the given lock, |