[GFS2] BUG: unable to handle kernel paging request at ffff81002690e000

This patch fixes bugzilla bug bz448866: gfs2: BUG: unable to
handle kernel paging request at ffff81002690e000.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 6387523a3153..3401628d742b 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -195,7 +195,7 @@ ulong_aligned:
            depending on architecture.  I've experimented with several ways
            of writing this section such as using an else before the goto
            but this one seems to be the fastest. */
-        while ((unsigned char *)plong < end - 1) {
+        while ((unsigned char *)plong < end - sizeof(unsigned long)) {
                 prefetch(plong + 1);
                 if (((*plong) & LBITMASK) != lskipval)
                         break;