From: Oleg Nesterov Cleanup. Imho makes the code much more understandable. At least this patch lessens both the source and compiled code. Signed-off-by: Oleg Nesterov Cc: Roland McGrath Cc: Thomas Gleixner Signed-off-by: Andrew Morton --- kernel/posix-timers.c | 23 ++++++++++------------- 1 file changed, 10 insertions(+), 13 deletions(-) diff -puN kernel/posix-timers.c~posix-timers-lock_timer-make-it-readable kernel/posix-timers.c --- a/kernel/posix-timers.c~posix-timers-lock_timer-make-it-readable +++ a/kernel/posix-timers.c @@ -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; } /* _