From: Oleg Nesterov Date: Mon, 22 Sep 2008 21:42:46 +0000 (-0700) Subject: posix-timers: always do get_task_struct(timer->it_process) X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=918fc0372831dca73039e1577bfea0c2ce49bdb6;p=linux-beck.git posix-timers: always do get_task_struct(timer->it_process) Change the code to get/put timer->it_process regardless of SIGEV_THREAD_ID. This streamlines the create/destroy paths and allows us to simplify the usage of exit_itimers() in de_thread(). Signed-off-by: Oleg Nesterov Cc: mingo@elte.hu Cc: Roland McGrath Signed-off-by: Andrew Morton Signed-off-by: Thomas Gleixner --- diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c index 3dfd15aecc60..bd9c931b3659 100644 --- a/kernel/posix-timers.c +++ b/kernel/posix-timers.c @@ -540,11 +540,10 @@ sys_timer_create(const clockid_t which_clock, */ spin_lock_irqsave(&process->sighand->siglock, flags); if (!(process->flags & PF_EXITING)) { + get_task_struct(process); new_timer->it_process = process; list_add(&new_timer->list, &process->signal->posix_timers); - if (new_timer->it_sigev_notify == (SIGEV_SIGNAL|SIGEV_THREAD_ID)) - get_task_struct(process); spin_unlock_irqrestore(&process->sighand->siglock, flags); } else { spin_unlock_irqrestore(&process->sighand->siglock, flags); @@ -561,6 +560,7 @@ sys_timer_create(const clockid_t which_clock, new_timer->it_sigev_signo = SIGALRM; new_timer->it_sigev_value.sival_int = new_timer->it_id; process = current->group_leader; + get_task_struct(process); spin_lock_irqsave(&process->sighand->siglock, flags); new_timer->it_process = process; list_add(&new_timer->list, &process->signal->posix_timers); @@ -853,8 +853,7 @@ retry_delete: * This keeps any tasks waiting on the spin lock from thinking * they got something (see the lock code above). */ - if (timer->it_sigev_notify == (SIGEV_SIGNAL|SIGEV_THREAD_ID)) - put_task_struct(timer->it_process); + put_task_struct(timer->it_process); timer->it_process = NULL; unlock_timer(timer, flags); @@ -881,8 +880,7 @@ retry_delete: * This keeps any tasks waiting on the spin lock from thinking * they got something (see the lock code above). */ - if (timer->it_sigev_notify == (SIGEV_SIGNAL|SIGEV_THREAD_ID)) - put_task_struct(timer->it_process); + put_task_struct(timer->it_process); timer->it_process = NULL; unlock_timer(timer, flags);