diff --git a/[refs] b/[refs]
index 5d3666c31f7c..1a17ab4c8fd9 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0ee23fda59740767324b4340247ca41a2f498ca6
+refs/heads/master: 11ad47a0edbd62bfc0547cfcdf227a911433f207
diff --git a/trunk/arch/xtensa/kernel/process.c b/trunk/arch/xtensa/kernel/process.c
index 2c8d6a3d250a..bc44311aa18c 100644
--- a/trunk/arch/xtensa/kernel/process.c
+++ b/trunk/arch/xtensa/kernel/process.c
@@ -31,6 +31,7 @@
 #include <linux/mqueue.h>
 #include <linux/fs.h>
 #include <linux/slab.h>
+#include <linux/rcupdate.h>
 
 #include <asm/pgtable.h>
 #include <asm/uaccess.h>
@@ -110,8 +111,10 @@ void cpu_idle(void)
 
 	/* endless idle loop with no priority at all */
 	while (1) {
+		rcu_idle_enter();
 		while (!need_resched())
 			platform_idle();
+		rcu_idle_exit();
 		schedule_preempt_disabled();
 	}
 }