[GFS2] Fix page lock/glock deadlock

This fixes a race between the glock and the page lock encountered
during truncate in gfs2_readpage and gfs2_prepare_write. The gfs2_readpages
function doesn't need the same fix since it only uses a try lock anyway, so
it will fail back to gfs2_readpage in the case of a potential deadlock.

This bug was spotted by Russell Cattelan.

Cc: Russell Cattelan <cattelan@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index b9856274df59..a331bf8175ea 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -27,7 +27,6 @@
 #define GL_ATIME                0x00000200
 #define GL_NOCACHE              0x00000400
 #define GL_NOCANCEL             0x00001000
-#define GL_AOP                  0x00004000
 
 #define GLR_TRYFAILED           13
 #define GLR_CANCELED            14