GFS2: Move rg_igeneration into struct gfs2_rgrpd

This moves one of the fields of struct gfs2_rgrpd_host into
the struct gfs2_rgrpd with the eventual aim of removing
the struct rgrpd_host completely.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 6f67e75..869ac83 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -71,7 +71,6 @@
 struct gfs2_rgrp_host {
 	u32 rg_free;
 	u32 rg_dinodes;
-	u64 rg_igeneration;
 };
 
 struct gfs2_rgrpd {
@@ -84,6 +83,7 @@
 	u32 rd_data;			/* num of data blocks in rgrp */
 	u32 rd_bitbytes;		/* number of bytes in data bitmaps */
 	struct gfs2_rgrp_host rd_rg;
+	u64 rd_igeneration;
 	struct gfs2_bitmap *rd_bits;
 	unsigned int rd_bh_count;
 	struct mutex rd_mutex;