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posix-timers: Annotate lock_timer()

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lock_timer() conditionally grabs it_lock in case of returning non-NULL
but unlock_timer() releases it unconditionally. This leads sparse to
complain about the lock context imbalance. Rename and wrap lock_timer
using __cond_lock() macro to make sparse happy.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Namhyung Kim 2010-10-20 15:57:34 -07:00 committed by Thomas Gleixner
parent dd6414b50f
commit 20f33a03f0
1 changed files with 8 additions and 2 deletions
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10
kernel/posix-timers.c
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@ -145,7 +145,13 @@ static int common_timer_del(struct k_itimer *timer);
static enum hrtimer_restart posix_timer_fn(struct hrtimer *data);
static struct k_itimer *lock_timer(timer_t timer_id, unsigned long *flags);
static struct k_itimer *__lock_timer(timer_t timer_id, unsigned long *flags);
#define lock_timer(tid, flags) \
({ struct k_itimer *__timr; \
__cond_lock(&__timr->it_lock, __timr = __lock_timer(tid, flags)); \
__timr; \
})
static inline void unlock_timer(struct k_itimer *timr, unsigned long flags)
{
@ -619,7 +625,7 @@ out:
* the find to the timer lock. To avoid a dead lock, the timer id MUST
* be release with out holding the timer lock.
*/
static struct k_itimer *lock_timer(timer_t timer_id, unsigned long *flags)
static struct k_itimer *__lock_timer(timer_t timer_id, unsigned long *flags)
{
struct k_itimer *timr;
/*