[patch added to the 3.12 stable tree] dcache: restore error on restart in prepend_path

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From: Mikulas Patocka <mpatocka@xxxxxxxxxx>

This patch has been added to the 3.12 stable tree. If you have any
objections, please let us know.

===============

We need to restore all variables including error (as it is done in the
upstream kernel). The variable error was errorneously not restored when
backporting the patch ede4cebce16f5643c61aedd6d88d9070a1d23a68
(prepend_path() needs to reinitialize dentry/vfsmount/mnt on restarts).

This should be applied only to the 3.12 series.

Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
 fs/dcache.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/dcache.c b/fs/dcache.c
index 30b38e23caa7..008f524e195a 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2893,6 +2893,7 @@ static int prepend_path(const struct path *path,
 restart:
 	bptr = *buffer;
 	blen = *buflen;
+	error = 0;
 	dentry = path->dentry;
 	vfsmnt = path->mnt;
 	mnt = real_mount(vfsmnt);
-- 
1.9.2

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