[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, 1 insertions, 8 deletions

diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index c94422b30ce..f5140bdc102 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -45,23 +45,16 @@ extern struct dentry_operations gfs2_dops;
 static struct gfs2_sbd *init_sbd(struct super_block *sb)
 {
 	struct gfs2_sbd *sdp;
-	unsigned int x;
 
-	sdp = vmalloc(sizeof(struct gfs2_sbd));
+	sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL);
 	if (!sdp)
 		return NULL;
 
-	memset(sdp, 0, sizeof(struct gfs2_sbd));
-
 	sb->s_fs_info = sdp;
 	sdp->sd_vfs = sb;
 
 	gfs2_tune_init(&sdp->sd_tune);
 
-	for (x = 0; x < GFS2_GL_HASH_SIZE; x++) {
-		rwlock_init(&sdp->sd_gl_hash[x].hb_lock);
-		INIT_LIST_HEAD(&sdp->sd_gl_hash[x].hb_list);
-	}
 	INIT_LIST_HEAD(&sdp->sd_reclaim_list);
 	spin_lock_init(&sdp->sd_reclaim_lock);
 	init_waitqueue_head(&sdp->sd_reclaim_wq);