exit: avoid sig->count in de_thread/__exit_signal synchronization
[linux-2.6.git] / fs / exec.c
index 0c72d23..e19de6a 100644 (file)
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -768,7 +768,6 @@ 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;
-       int count;
 
        if (thread_group_empty(tsk))
                goto no_thread_group;
@@ -785,13 +784,13 @@ static int de_thread(struct task_struct *tsk)
                spin_unlock_irq(lock);
                return -EAGAIN;
        }
+
        sig->group_exit_task = tsk;
-       zap_other_threads(tsk);
+       sig->notify_count = zap_other_threads(tsk);
+       if (!thread_group_leader(tsk))
+               sig->notify_count--;
 
-       /* Account for the thread group leader hanging around: */
-       count = thread_group_leader(tsk) ? 1 : 2;
-       sig->notify_count = count;
-       while (atomic_read(&sig->count) > count) {
+       while (sig->notify_count) {
                __set_current_state(TASK_UNINTERRUPTIBLE);
                spin_unlock_irq(lock);
                schedule();