Subject: hack.patch
From: Thomas Gleixner <tglx@linutronix.de>
Date: Mon, 01 Jul 2013 11:02:42 +0200
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/3.10/patches-3.10.4-rt1.tar.xz

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 kernel/workqueue.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux-stable/kernel/workqueue.c
===================================================================
--- linux-stable.orig/kernel/workqueue.c
+++ linux-stable/kernel/workqueue.c
@@ -48,6 +48,7 @@
 #include <linux/moduleparam.h>
 #include <linux/uaccess.h>
 #include <linux/locallock.h>
+#include <linux/delay.h>
 
 #include "workqueue_internal.h"
 
@@ -1235,7 +1236,7 @@ fail:
 	local_unlock_irqrestore(pendingb_lock, *flags);
 	if (work_is_canceling(work))
 		return -ENOENT;
-	cpu_relax();
+	cpu_chill();
 	return -EAGAIN;
 }