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Commit c99fcf28 authored by Oleg Nesterov's avatar Oleg Nesterov Committed by Linus Torvalds
Browse files

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: default avatarOleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent f8c5b5c0

kernel/signal.c

+1 −2
Original line number Diff line number Diff line
@@ -1335,7 +1335,6 @@ send_group_sigqueue(int sig, struct sigqueue *q, struct task_struct *p) 


	BUG_ON(!(q->flags & SIGQUEUE_PREALLOC));



	read_lock(&tasklist_lock);

	/* Since it_lock is held, p->sighand cannot be NULL. */

	spin_lock_irqsave(&p->sighand->siglock, flags);
@@ -1344,7 +1343,7 @@ send_group_sigqueue(int sig, struct sigqueue *q, struct task_struct *p) 
	__group_complete_signal(sig, p);



	spin_unlock_irqrestore(&p->sighand->siglock, flags);

	read_unlock(&tasklist_lock);



	return ret;

}