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signals: send_sigqueue: don't take rcu lock

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lock_task_sighand() was changed, send_sigqueue() doesn't need rcu_read_lock()
any longer.

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 00:52:48 -07:00 committed by Linus Torvalds
parent f6b76d4fb0
commit 5c193e8871
1 changed files with 0 additions and 4 deletions
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4
kernel/signal.c
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@ -1311,8 +1311,6 @@ int send_sigqueue(int sig, struct sigqueue *q, struct task_struct *p)
* We return -1, when the task is marked exiting, so * We return -1, when the task is marked exiting, so
* posix_timer_event can redirect it to the group leader * posix_timer_event can redirect it to the group leader
*/ */
rcu_read_lock();
if (!likely(lock_task_sighand(p, &flags))) if (!likely(lock_task_sighand(p, &flags)))
goto out_err; goto out_err;
@ -1323,8 +1321,6 @@ int send_sigqueue(int sig, struct sigqueue *q, struct task_struct *p)
unlock_task_sighand(p, &flags); unlock_task_sighand(p, &flags);
out_err: out_err:
rcu_read_unlock();
return ret; return ret;
} }