a7y18lte-ubports/android_kernel_samsung_universal7885
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signals: send_group_sigqueue: don't take tasklist_lock

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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>
This commit is contained in:
Oleg Nesterov 2008-04-30 00:52:49 -07:00 committed by Linus Torvalds
parent f8c5b5c06f
commit c99fcf28b8
1 changed files with 1 additions and 2 deletions
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3
kernel/signal.c
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@ -1335,7 +1335,6 @@ send_group_sigqueue(int sig, struct sigqueue *q, struct task_struct *p)
BUG_ON(!(q->flags & SIGQUEUE_PREALLOC)); BUG_ON(!(q->flags & SIGQUEUE_PREALLOC));
read_lock(&tasklist_lock);
/* Since it_lock is held, p->sighand cannot be NULL. */ /* Since it_lock is held, p->sighand cannot be NULL. */
spin_lock_irqsave(&p->sighand->siglock, flags); 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); __group_complete_signal(sig, p);
spin_unlock_irqrestore(&p->sighand->siglock, flags); spin_unlock_irqrestore(&p->sighand->siglock, flags);
read_unlock(&tasklist_lock);
return ret; return ret;
} }