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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2010-03-11 14:04:46 -0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2010-03-12 22:40:42 +0100 |
| commit | 06f71b922ce5a05352acd706564ca4ae1f2add0e (patch) | |
| tree | 36e2febfdb380364f1df10c48560695d8406635f /kernel/timer.c | |
| parent | 64ce4c2f5252f25798117fa80a027993163d6d84 (diff) | |
| download | lwn-06f71b922ce5a05352acd706564ca4ae1f2add0e.tar.gz lwn-06f71b922ce5a05352acd706564ca4ae1f2add0e.zip | |
timer: Print function name for timer callbacks modifying preemption count
A function scheduled with a timer must not exit with a different
preempt count than it was entered. To make helping users running into
the corresponding BUG() easier also print the name of the bad function
not only its address.
[ tglx: Sanitized printk ]
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: johnstul@us.ibm.com
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/timer.c')
| -rw-r--r-- | kernel/timer.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/kernel/timer.c b/kernel/timer.c index c61a7949387f..f82f4bfe2d88 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -1027,11 +1027,8 @@ static inline void __run_timers(struct tvec_base *base) lock_map_release(&lockdep_map); if (preempt_count != preempt_count()) { - printk(KERN_ERR "huh, entered %p " - "with preempt_count %08x, exited" - " with %08x?\n", - fn, preempt_count, - preempt_count()); + printk(KERN_ERR "timer: %pF preempt leak: %08x -> %08x\n", + fn, preempt_count, preempt_count()); BUG(); } } |