---

yaml --- r: 332333 b: refs/heads/master c: 075663d h: refs/heads/master i: 332331: 937a315 v: v3
git-mirror · Oct 9, 2012 · f9eec06 · f9eec06
1 parent ecdb71b
commit f9eec06
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Showing 2 changed files with 5 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7ac57a89de958fbb5271dc504d0c25e34dbeec32
+refs/heads/master: 075663d19885eb3738fd2d7dbdb8947e12563b68
diff --git a/trunk/kernel/cpu.c b/trunk/kernel/cpu.c
@@ -80,6 +80,10 @@ void put_online_cpus(void)
 	if (cpu_hotplug.active_writer == current)
 		return;
 	mutex_lock(&cpu_hotplug.lock);
+
+	if (WARN_ON(!cpu_hotplug.refcount))
+		cpu_hotplug.refcount++; /* try to fix things up */
+
 	if (!--cpu_hotplug.refcount && unlikely(cpu_hotplug.active_writer))
 		wake_up_process(cpu_hotplug.active_writer);
 	mutex_unlock(&cpu_hotplug.lock);