diff options
| author | Namhyung Kim <namhyung@gmail.com> | 2010-10-20 15:57:34 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2010-10-21 17:30:06 +0200 |
| commit | 20f33a03f0cf87e51165f7084f697acfb68e865b (patch) | |
| tree | 620923847a27c966b6b2030d784cc864e8ed06d3 /kernel/posix-timers.c | |
| parent | dd6414b50fa2b1cd247a8aa8f8bd42414b7453e1 (diff) | |
| download | lwn-20f33a03f0cf87e51165f7084f697acfb68e865b.tar.gz lwn-20f33a03f0cf87e51165f7084f697acfb68e865b.zip | |
posix-timers: Annotate lock_timer()
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>
Diffstat (limited to 'kernel/posix-timers.c')
| -rw-r--r-- | kernel/posix-timers.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c index 9ca4973f736d..93bd2eb2bc53 100644 --- a/kernel/posix-timers.c +++ b/kernel/posix-timers.c @@ -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; /* |