Revert "GFS2: Fix use-after-free bug on umount"

This reverts commit 78802499912f1ba31ce83a94c55b5a980f250a43.

The original patch is causing problems in relation to order of
operations at umount in relation to jdata files. I need to fix
this a different way.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 5eae62e..6e298b0 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -1547,9 +1547,8 @@
  * Called when unmounting the filesystem.
  */
 
-void gfs2_gl_hash_clear(struct super_block *sb)
+void gfs2_gl_hash_clear(struct gfs2_sbd *sdp)
 {
-	struct gfs2_sbd *sdp = sb->s_fs_info;
 	unsigned long t;
 	unsigned int x;
 	int cont;