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authorOleg Nesterov <oleg@redhat.com>2010-06-11 01:09:44 +0200
committerIngo Molnar <mingo@elte.hu>2010-06-18 10:46:55 +0200
commita44702e8858a071aa0f2365113ea4a2e51c8b575 (patch)
treef43ffdfb4ba51a581b73d5386eac5ccf92584e62 /kernel/sched.c
parentb6b12294405e6ec029e627c49adf3193829a2685 (diff)
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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>
Diffstat (limited to 'kernel/sched.c')
-rw-r--r--kernel/sched.c8
1 files changed, 2 insertions, 6 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 132950b33dd..b4427cc70ac 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -4600,12 +4600,8 @@ recheck:
*/
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)