[PATCH] do_group_exit: don't take tasklist_lock
do_group_exit() takes tasklist_lock for zap_other_threads(), this is unneeded now. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -985,7 +985,6 @@ do_group_exit(int exit_code)
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else if (!thread_group_empty(current)) {
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struct signal_struct *const sig = current->signal;
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struct sighand_struct *const sighand = current->sighand;
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read_lock(&tasklist_lock);
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spin_lock_irq(&sighand->siglock);
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if (sig->flags & SIGNAL_GROUP_EXIT)
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/* Another thread got here before we took the lock. */
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@ -995,7 +994,6 @@ do_group_exit(int exit_code)
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zap_other_threads(current);
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}
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spin_unlock_irq(&sighand->siglock);
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read_unlock(&tasklist_lock);
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}
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do_exit(exit_code);
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