[GFS2] split and annotate gfs2_log_head

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 8ca7a7f..e69f339 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -41,7 +41,7 @@
 	void (*lo_before_commit) (struct gfs2_sbd *sdp);
 	void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_ail *ai);
 	void (*lo_before_scan) (struct gfs2_jdesc *jd,
-				struct gfs2_log_header *head, int pass);
+				struct gfs2_log_header_host *head, int pass);
 	int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
 				 struct gfs2_log_descriptor *ld, __be64 *ptr,
 				 int pass);