sched: __sched_setscheduler: Read the RLIMIT_RTPRIO value lockless
__sched_setscheduler() takes lock_task_sighand() to access task->signal.
This is not needed since ea6d290c, ->signal can't go away.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20100610230944.GA25903@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/sched.c b/kernel/sched.c
index 132950b..b4427cc 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -4600,12 +4600,8 @@
*/
if (user && !capable(CAP_SYS_NICE)) {
if (rt_policy(policy)) {
- unsigned long rlim_rtprio;
-
- if (!lock_task_sighand(p, &flags))
- return -ESRCH;
- rlim_rtprio = task_rlimit(p, RLIMIT_RTPRIO);
- unlock_task_sighand(p, &flags);
+ unsigned long rlim_rtprio =
+ task_rlimit(p, RLIMIT_RTPRIO);
/* can't set/change the rt policy */
if (policy != p->policy && !rlim_rtprio)