Commit 19319103 authored Apr 30, 2008 by Oleg Nesterov Committed by Linus Torvalds Apr 30, 2008

signals: check_kill_permission: remove tasklist_lock



Now that task_session() can't return a false NULL, check_kill_permission()
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>

parent 2e2ba22e

kernel/signal.c

+0 −2

Original line number	Diff line number	Diff line
		@@ -551,9 +551,7 @@ static int check_kill_permission(int sig, struct siginfo *info,
		!capable(CAP_KILL)) {
		switch (sig) {
		case SIGCONT:
		read_lock(&tasklist_lock);
		sid = task_session(t);
		read_unlock(&tasklist_lock);
		/*
		* We don't return the error if sid == NULL. The
		* task was unhashed, the caller must notice this.