diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2010-06-11 01:09:44 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-06-18 10:46:55 +0200 |
| commit | a44702e8858a071aa0f2365113ea4a2e51c8b575 (patch) | |
| tree | f43ffdfb4ba51a581b73d5386eac5ccf92584e62 | |
| parent | b6b12294405e6ec029e627c49adf3193829a2685 (diff) | |
| download | blackbird-op-linux-a44702e8858a071aa0f2365113ea4a2e51c8b575.tar.gz blackbird-op-linux-a44702e8858a071aa0f2365113ea4a2e51c8b575.zip | |
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>
| -rw-r--r-- | kernel/sched.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 132950b33dde..b4427cc70acd 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) |
