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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2010-05-06 20:42:52 +0200 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2010-05-07 07:23:21 +0200 |
| commit | fc390cde362309f6892bb719194f242c466a978b (patch) | |
| tree | 07bfb72fb4eff28cc515a0ff5b2d1571db4f4b69 /kernel/sched.c | |
| parent | sched: correctly place paranioa memory barriers in synchronize_sched_expedited() (diff) | |
| download | linux-fc390cde362309f6892bb719194f242c466a978b.tar.xz linux-fc390cde362309f6892bb719194f242c466a978b.zip | |
rcu: need barrier() in UP synchronize_sched_expedited()
If synchronize_sched_expedited() is ever to be called from within
kernel/sched.c in a !SMP PREEMPT kernel, the !SMP implementation needs
a barrier().
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 155a16d52146..fbaf3128d010 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -8932,6 +8932,7 @@ struct cgroup_subsys cpuacct_subsys = { void synchronize_sched_expedited(void) { + barrier(); } EXPORT_SYMBOL_GPL(synchronize_sched_expedited); |