GFS2: only use lvb on glocks that need it

Save the effort of allocating, reading and writing
the lvb for most glocks that do not use it.

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index a35ef5cd1480..bd577fc59e0b 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -216,6 +216,7 @@ struct gfs2_glock_operations {
         const int go_type;
         const unsigned long go_flags;
 #define GLOF_ASPACE 1
+#define GLOF_LVB    2
 };
 
 enum {
@@ -321,7 +322,7 @@ struct gfs2_glock {
         ktime_t gl_dstamp;
         struct gfs2_lkstats gl_stats;
         struct dlm_lksb gl_lksb;
-        char gl_lvb[32];
+        char *gl_lvb;
         unsigned long gl_tchange;
         void *gl_object;