[GFS2] Move glock hash table out of superblock

There are several reasons why we want to do this:
 - Firstly its large and thus we'll scale better with multiple
   GFS2 fs mounted at the same time
 - Secondly its easier to scale its size as required (thats a plan
   for later patches)
 - Thirdly, we can use kzalloc rather than vmalloc when allocating
   the superblock (its now only 4888 bytes)
 - Fourth its all part of my plan to eventually be able to use RCU
   with the glock hash.

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

1 files changed, 5 insertions, 1 deletions

diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
index 143fda727a9c..2bdf246436c7 100644
--- a/fs/gfs2/main.c
+++ b/fs/gfs2/main.c
@@ -23,6 +23,7 @@
 #include "ops_fstype.h"
 #include "sys.h"
 #include "util.h"
+#include "glock.h"
 
 static void gfs2_init_inode_once(void *foo, kmem_cache_t *cachep, unsigned long flags)
 {
@@ -69,8 +70,11 @@ static int __init init_gfs2_fs(void)
         if (error)
                 return error;
 
-        error = -ENOMEM;
+        error = gfs2_glock_init();
+        if (error)
+                goto fail;
 
+        error = -ENOMEM;
         gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
                                               sizeof(struct gfs2_glock),
                                               0, 0,