[GFS2] Shrink gfs2_inode (4) - di_uid/di_gid

Remove duplicate di_uid/di_gid fields in favour of using
inode->i_uid/inode->i_gid instead. This saves 8 bytes.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index 5d00e9b..d0db881 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -452,19 +452,19 @@
 	if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
 		return 0;
 
-	error = qdsb_get(sdp, QUOTA_USER, ip->i_di.di_uid, CREATE, qd);
+	error = qdsb_get(sdp, QUOTA_USER, ip->i_inode.i_uid, CREATE, qd);
 	if (error)
 		goto out;
 	al->al_qd_num++;
 	qd++;
 
-	error = qdsb_get(sdp, QUOTA_GROUP, ip->i_di.di_gid, CREATE, qd);
+	error = qdsb_get(sdp, QUOTA_GROUP, ip->i_inode.i_gid, CREATE, qd);
 	if (error)
 		goto out;
 	al->al_qd_num++;
 	qd++;
 
-	if (uid != NO_QUOTA_CHANGE && uid != ip->i_di.di_uid) {
+	if (uid != NO_QUOTA_CHANGE && uid != ip->i_inode.i_uid) {
 		error = qdsb_get(sdp, QUOTA_USER, uid, CREATE, qd);
 		if (error)
 			goto out;
@@ -472,7 +472,7 @@
 		qd++;
 	}
 
-	if (gid != NO_QUOTA_CHANGE && gid != ip->i_di.di_gid) {
+	if (gid != NO_QUOTA_CHANGE && gid != ip->i_inode.i_gid) {
 		error = qdsb_get(sdp, QUOTA_GROUP, gid, CREATE, qd);
 		if (error)
 			goto out;