Messages in this thread Patch in this message | | | Date | Tue, 5 Aug 2008 19:32:13 +0400 | From | Oleg Nesterov <> | Subject | [PATCH 2/2] posix-timers: lock_timer: make it readable |
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Cleanup. Imho makes the code much more understandable. At least this patch lessens both the source and compiled code.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
--- 26-rc2/kernel/posix-timers.c~10_LOCK_TIMER 2008-08-05 17:56:33.000000000 +0400 +++ 26-rc2/kernel/posix-timers.c 2008-08-05 18:53:19.000000000 +0400 @@ -557,7 +557,7 @@ 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; /* @@ -565,23 +565,20 @@ static struct k_itimer * lock_timer(time * flags part over to the timer lock. Must not let interrupts in * while we are moving the lock. */ - spin_lock_irqsave(&idr_lock, *flags); - timr = idr_find(&posix_timers_id, (int) timer_id); + timr = idr_find(&posix_timers_id, (int)timer_id); if (timr) { spin_lock(&timr->it_lock); - - if (!timr->it_process || - !same_thread_group(timr->it_process, current)) { - spin_unlock(&timr->it_lock); - spin_unlock_irqrestore(&idr_lock, *flags); - timr = NULL; - } else + if (timr->it_process && + same_thread_group(timr->it_process, current)) { spin_unlock(&idr_lock); - } else - spin_unlock_irqrestore(&idr_lock, *flags); + return timr; + } + spin_unlock(&timr->it_lock); + } + spin_unlock_irqrestore(&idr_lock, *flags); - return timr; + return NULL; } /*
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