[GFS2] [-mm patch] fs/gfs2/: possible cleanups

This patch contains the following possible cleanups:
- make needlessly global code static
- #if 0 unused functions
- remove the following global function that was both unused and
  unimplemented:
  - super.c: gfs2_do_upgrade()

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/quota.h

@@ -24,8 +24,6 @@ void gfs2_quota_change(struct gfs2_inode *ip, int64_t change,
 
 int gfs2_quota_sync(struct gfs2_sbd *sdp);
 int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, uint32_t id);
-int gfs2_quota_read(struct gfs2_sbd *sdp, int user, uint32_t id,
-		    struct gfs2_quota *q);
 
 int gfs2_quota_init(struct gfs2_sbd *sdp);
 void gfs2_quota_scan(struct gfs2_sbd *sdp);