diff --git a/[refs] b/[refs]
index 7d818604e2e7..dc2cc28e5555 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 04a54d27ce9698d108d29c8a6a50c28f7446336b
+refs/heads/master: b01c3a0010aabadf745f3e7fdb9cab682e0a28a2
diff --git a/trunk/include/linux/perf_event.h b/trunk/include/linux/perf_event.h
index ca9ed4e6a286..ddbb6a901f65 100644
--- a/trunk/include/linux/perf_event.h
+++ b/trunk/include/linux/perf_event.h
@@ -403,13 +403,6 @@ struct perf_event_mmap_page {
 	__u64	data_tail;		/* user-space written tail */
 };
 
-/*
- * Build time assertion that we keep the data_head at the intended location.
- * IOW, validation we got the __reserved[] size right.
- */
-extern char __assert_mmap_data_head_offset
-	[1 - 2*!!(offsetof(struct perf_event_mmap_page, data_head) != 1024)];
-
 #define PERF_RECORD_MISC_CPUMODE_MASK		(7 << 0)
 #define PERF_RECORD_MISC_CPUMODE_UNKNOWN	(0 << 0)
 #define PERF_RECORD_MISC_KERNEL			(1 << 0)
diff --git a/trunk/kernel/events/core.c b/trunk/kernel/events/core.c
index dc3b05272511..3f92a19aa11e 100644
--- a/trunk/kernel/events/core.c
+++ b/trunk/kernel/events/core.c
@@ -7116,6 +7116,13 @@ void __init perf_event_init(void)
 
 	/* do not patch jump label more than once per second */
 	jump_label_rate_limit(&perf_sched_events, HZ);
+
+	/*
+	 * Build time assertion that we keep the data_head at the intended
+	 * location.  IOW, validation we got the __reserved[] size right.
+	 */
+	BUILD_BUG_ON((offsetof(struct perf_event_mmap_page, data_head))
+		     != 1024);
 }
 
 static int __init perf_event_sysfs_init(void)