From 0c8c77d35582c3f7989f1316368da5ae7f14ad4b Mon Sep 17 00:00:00 2001
From: Christian Borntraeger <borntraeger@de.ibm.com>
Date: Wed, 23 Apr 2014 20:58:45 +0200
Subject: [PATCH] s390/ccwgroup: Fix memory corruption

commit 0b60f9ead5d4816e7e3d6e28f4a0d22d4a1b2513 (s390: use
device_remove_file_self() instead of device_schedule_callback())

caused random memory corruption on my s390 box. Turns out that the
last element of the ccwgroup structure is of dynamic size, so we
must move the newly introduced work structure _before_ the zero
length array.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
CC: Tejun Heo <tj@kernel.org>
CC: Martin Schwidefsky <schwidefsky@de.ibm.com>
CC: Heiko Carstens <heiko.carstens@de.ibm.com>
CC: Sebastian Ott <sebott@linux.vnet.ibm.com>
CC: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/s390/include/asm/ccwgroup.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/s390/include/asm/ccwgroup.h b/arch/s390/include/asm/ccwgroup.h
index 6e670f88d125..ebc2913f9ee0 100644
--- a/arch/s390/include/asm/ccwgroup.h
+++ b/arch/s390/include/asm/ccwgroup.h
@@ -22,8 +22,8 @@ struct ccwgroup_device {
 /* public: */
 	unsigned int count;
 	struct device	dev;
-	struct ccw_device *cdev[0];
 	struct work_struct ungroup_work;
+	struct ccw_device *cdev[0];
 };
 
 /**
-- 
2.20.1