sched: Fix cond_resched_lock() in !CONFIG_PREEMPT

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The might_sleep() test inside cond_resched_lock() assumes the
spinlock is held and then preemption is disabled. This is true
with CONFIG_PREEMPT but the preempt_count() doesn't change
otherwise.

Check by starting from the appropriate preempt offset depending
on the config.

Reported-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1248458723-12146-1-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

This commit is contained in:

Frederic Weisbecker 2009-07-24 20:05:23 +02:00 • committed by Ingo Molnar

parent a004cd4218

commit 716a42348c

1 changed files with 7 additions and 1 deletions

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8

include/linux/sched.h

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