source: branches/fc15-dev/server/common/patches/openafs-linux-3.1-zalloc.patch

From e7669883d5124f85bad6840a4e8280e4de32f7a5 Mon Sep 17 00:00:00 2001
From: Marc Dionne <marc.c.dionne@gmail.com>
Date: Mon, 21 Nov 2011 21:27:06 -0500
Subject: [PATCH] Linux: make sure backing_dev_info is zeroed

The afs backing_dev_info structure is allocated dynamically
without zeroing out the contents.  In particular there's no
guarantee that congested_fn is NULL, causing spurious oopses
when bdi_congested in the kernel tries to call it.

(adapted from commit 8e97cf6f215d5575c63d86eaec59031399f4beda)

Change-Id: I83755b6bb5ec2fada7e077c00d3d8edf8af1cae4
---
 src/afs/LINUX/osi_vfsops.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/src/afs/LINUX/osi_vfsops.c b/src/afs/LINUX/osi_vfsops.c
index d32720f..0d41bc7 100644
--- a/src/afs/LINUX/osi_vfsops.c
+++ b/src/afs/LINUX/osi_vfsops.c
@@ -114,6 +114,7 @@ afs_fill_super(struct super_block *sb, void *data, int silent)
 
     /* used for inodes backing_dev_info field, also */
     afs_backing_dev_info = osi_Alloc(sizeof(struct backing_dev_info));
+    memset(afs_backing_dev_info, 0, sizeof(struct backing_dev_info));
 #if defined(HAVE_LINUX_BDI_INIT)
     bdi_init(afs_backing_dev_info);
 #endif
-- 
1.7.2.5