Re: [GIT PULL rcu/next] RCU commits for 3.1

[Peter Zijlstra <peterz@infradead.org>]

On Mon, 2011-11-07 at 08:56 -0800, Paul E. McKenney wrote:
> 
> If this really is a false positive, what should be used to get rid of
> the splats? 


Probably something slightly less horrid than the below.. ;-)

---

diff --git a/kernel/events/core.c b/kernel/events/core.c
index d1a1bee..8f05201 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -229,7 +229,7 @@ static void perf_ctx_unlock(struct perf_cpu_context *cpuctx,
 static inline struct perf_cgroup *
 perf_cgroup_from_task(struct task_struct *task)
 {
-	return container_of(task_subsys_state(task, perf_subsys_id),
+	return container_of(task_subsys_state_check(task, perf_subsys_id, 1),
 			struct perf_cgroup, css);
 }