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 <[email protected]>
--- 26-rc2/kernel/posix-timers.c~2_GET_LEADER 2008-08-03 20:25:41.000000000 +0400
+++ 26-rc2/kernel/posix-timers.c 2008-08-03 21:13:25.000000000 +0400
@@ -540,11 +540,10 @@ sys_timer_create(const clockid_t which_c
*/
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_c
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);