signals: send_sigqueue: don't take rcu lock (5c193e88) · Commits · 戴 / test

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:

kernel/signal.c

+0 −4

Original line number	Diff line number	Diff line
		@@ -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
		* posix_timer_event can redirect it to the group leader
		*/
		rcu_read_lock();

		if (!likely(lock_task_sighand(p, &flags)))
		goto out_err;

		@@ -1323,8 +1321,6 @@ int send_sigqueue(int sig, struct sigqueue q, struct task_struct p)

		unlock_task_sighand(p, &flags);
		out_err:
		rcu_read_unlock();

		return ret;
		}