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authorOleg Nesterov <oleg@tv-sign.ru>2008-09-22 14:42:46 -0700
committerThomas Gleixner <tglx@linutronix.de>2008-09-24 15:45:47 +0200
commit918fc0372831dca73039e1577bfea0c2ce49bdb6 (patch)
treec8c11b7929fc0f0768109679a3733dd3eb6741c6 /kernel/posix-timers.c
parent4aa7361179bed905fd0f35b236a5c65db683b9e0 (diff)
downloadop-kernel-dev-918fc0372831dca73039e1577bfea0c2ce49bdb6.zip
op-kernel-dev-918fc0372831dca73039e1577bfea0c2ce49bdb6.tar.gz
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 <oleg@tv-sign.ru> Cc: mingo@elte.hu Cc: Roland McGrath <roland@redhat.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.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index 3dfd15a..bd9c931 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);
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