diff --git a/[refs] b/[refs]
index d60825a36300..65c1c097eec0 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e44aef58ecfbe061eb4c53b939bcc35fb1bee82d
+refs/heads/master: 01ea1ccaa24dea3552e103be13b7897211607a8b
diff --git a/trunk/kernel/perf_counter.c b/trunk/kernel/perf_counter.c
index d7a79f321b1c..37f771691f93 100644
--- a/trunk/kernel/perf_counter.c
+++ b/trunk/kernel/perf_counter.c
@@ -45,8 +45,8 @@ hw_perf_counter_init(struct perf_counter *counter)
 }
 
 u64 __weak hw_perf_save_disable(void)		{ return 0; }
-void __weak hw_perf_restore(u64 ctrl)		{ }
-void __weak hw_perf_counter_setup(void)		{ }
+void __weak hw_perf_restore(u64 ctrl)		{ barrier(); }
+void __weak hw_perf_counter_setup(void)		{ barrier(); }
 
 static void
 list_add_counter(struct perf_counter *counter, struct perf_counter_context *ctx)