signals: send_group_sigqueue: don't take tasklist_lock
handle_stop_signal() was changed, now send_group_sigqueue() doesn't need tasklist_lock. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -1335,7 +1335,6 @@ send_group_sigqueue(int sig, struct sigqueue *q, struct task_struct *p)
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BUG_ON(!(q->flags & SIGQUEUE_PREALLOC));
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read_lock(&tasklist_lock);
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/* Since it_lock is held, p->sighand cannot be NULL. */
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spin_lock_irqsave(&p->sighand->siglock, flags);
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@ -1344,7 +1343,7 @@ send_group_sigqueue(int sig, struct sigqueue *q, struct task_struct *p)
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__group_complete_signal(sig, p);
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spin_unlock_irqrestore(&p->sighand->siglock, flags);
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read_unlock(&tasklist_lock);
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return ret;
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}
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