---

yaml --- r: 16914 b: refs/heads/master c: 03a285f h: refs/heads/master v: v3
git-mirror · Jan 9, 2006 · df9ea6a · df9ea6a
1 parent 83431ad
commit df9ea6a
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Showing 2 changed files with 10 additions and 5 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7edc59628b2f5d6516b4677b3b56f5f056e45cd9
+refs/heads/master: 03a285f58064b8e0af08383e082e383753d9c33e
diff --git a/trunk/kernel/cpuset.c b/trunk/kernel/cpuset.c
@@ -647,10 +647,15 @@ void cpuset_update_task_memory_state()
 	struct task_struct *tsk = current;
 	struct cpuset *cs;
 
-	rcu_read_lock();
-	cs = rcu_dereference(tsk->cpuset);
-	my_cpusets_mem_gen = cs->mems_generation;
-	rcu_read_unlock();
+	if (tsk->cpuset == &top_cpuset) {
+		/* Don't need rcu for top_cpuset.  It's never freed. */
+		my_cpusets_mem_gen = top_cpuset.mems_generation;
+	} else {
+		rcu_read_lock();
+		cs = rcu_dereference(tsk->cpuset);
+		my_cpusets_mem_gen = cs->mems_generation;
+		rcu_read_unlock();
+	}
 
 	if (my_cpusets_mem_gen != tsk->cpuset_mems_generation) {
 		down(&callback_sem);