diff --git a/[refs] b/[refs]
index 6cb8307ff410..134e7299d757 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 67178767b936fb47a3a5e88097cff41ccbda7acb
+refs/heads/master: 4c49b12853fbb5eff4849b7b6a1e895776f027a1
diff --git a/trunk/include/linux/perf_event.h b/trunk/include/linux/perf_event.h
index 45b56faf5cdc..ec3768a81058 100644
--- a/trunk/include/linux/perf_event.h
+++ b/trunk/include/linux/perf_event.h
@@ -219,7 +219,7 @@ struct perf_event_attr {
 #define PERF_EVENT_IOC_DISABLE		_IO ('$', 1)
 #define PERF_EVENT_IOC_REFRESH		_IO ('$', 2)
 #define PERF_EVENT_IOC_RESET		_IO ('$', 3)
-#define PERF_EVENT_IOC_PERIOD		_IOW('$', 4, u64)
+#define PERF_EVENT_IOC_PERIOD		_IOW('$', 4, __u64)
 #define PERF_EVENT_IOC_SET_OUTPUT	_IO ('$', 5)
 #define PERF_EVENT_IOC_SET_FILTER	_IOW('$', 6, char *)