--- zzzz-none-000/linux-3.10.107/fs/gfs2/meta_io.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/fs/gfs2/meta_io.h	2021-02-04 17:41:59.000000000 +0000
@@ -38,31 +38,30 @@
 }
 
 extern const struct address_space_operations gfs2_meta_aops;
+extern const struct address_space_operations gfs2_rgrp_aops;
 
 static inline struct gfs2_sbd *gfs2_mapping2sbd(struct address_space *mapping)
 {
 	struct inode *inode = mapping->host;
 	if (mapping->a_ops == &gfs2_meta_aops)
-		return (((struct gfs2_glock *)mapping) - 1)->gl_sbd;
+		return (((struct gfs2_glock *)mapping) - 1)->gl_name.ln_sbd;
+	else if (mapping->a_ops == &gfs2_rgrp_aops)
+		return container_of(mapping, struct gfs2_sbd, sd_aspace);
 	else
 		return inode->i_sb->s_fs_info;
 }
 
-void gfs2_meta_sync(struct gfs2_glock *gl);
-
-struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, u64 blkno);
-int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno,
-		   int flags, struct buffer_head **bhp);
-int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh);
-struct buffer_head *gfs2_getbuf(struct gfs2_glock *gl, u64 blkno, int create);
-
-void gfs2_remove_from_journal(struct buffer_head *bh, struct gfs2_trans *tr,
-			      int meta);
-
-void gfs2_meta_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen);
-
-int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num,
-			      struct buffer_head **bhp);
+extern struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, u64 blkno);
+extern int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
+			  struct buffer_head **bhp);
+extern int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh);
+extern struct buffer_head *gfs2_getbuf(struct gfs2_glock *gl, u64 blkno,
+				       int create);
+extern void gfs2_remove_from_journal(struct buffer_head *bh,
+				     struct gfs2_trans *tr, int meta);
+extern void gfs2_meta_wipe(struct gfs2_inode *ip, u64 bstart, u32 blen);
+extern int gfs2_meta_indirect_buffer(struct gfs2_inode *ip, int height, u64 num,
+				     struct buffer_head **bhp);
 
 static inline int gfs2_meta_inode_buffer(struct gfs2_inode *ip,
 					 struct buffer_head **bhp)