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authorOleg Nesterov <oleg@tv-sign.ru>2008-12-01 14:18:16 -0800
committerIngo Molnar <mingo@elte.hu>2008-12-12 17:01:03 +0100
commit8187926bdae98648db24db3391c4efd21ec669b1 (patch)
treee3f35eee71cdaefcf6af15471a7aee3444e658d4
parent899921025b406a71a8aeb2d7855658ea0cf0ed23 (diff)
posix-timers: simplify de_thread()->exit_itimers() path
Impact: simplify code de_thread() postpones release_task(leader) until after exit_itimers(). This was needed because !SIGEV_THREAD_ID timers could use ->group_leader without get_task_struct(). With the recent changes we can release the leader earlier and simplify the code. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--fs/exec.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/fs/exec.c b/fs/exec.c
index ec5df9a3831..b4e5b8a9216 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -772,7 +772,6 @@ static int de_thread(struct task_struct *tsk)
struct signal_struct *sig = tsk->signal;
struct sighand_struct *oldsighand = tsk->sighand;
spinlock_t *lock = &oldsighand->siglock;
- struct task_struct *leader = NULL;
int count;
if (thread_group_empty(tsk))
@@ -810,7 +809,7 @@ static int de_thread(struct task_struct *tsk)
* and to assume its PID:
*/
if (!thread_group_leader(tsk)) {
- leader = tsk->group_leader;
+ struct task_struct *leader = tsk->group_leader;
sig->notify_count = -1; /* for exit_notify() */
for (;;) {
@@ -862,8 +861,9 @@ static int de_thread(struct task_struct *tsk)
BUG_ON(leader->exit_state != EXIT_ZOMBIE);
leader->exit_state = EXIT_DEAD;
-
write_unlock_irq(&tasklist_lock);
+
+ release_task(leader);
}
sig->group_exit_task = NULL;
@@ -872,8 +872,6 @@ static int de_thread(struct task_struct *tsk)
no_thread_group:
exit_itimers(sig);
flush_itimer_signals();
- if (leader)
- release_task(leader);
if (atomic_read(&oldsighand->count) != 1) {
struct sighand_struct *newsighand;