gfs2: make gfs2_log_shutdown static

Function gfs2_log_shutdown is only called from within log.c. This
patch removes the extern declaration and makes it static.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

fs/gfs2/log.c

@@ -31,6 +31,8 @@
 #include "dir.h"
 #include "trace_gfs2.h"
 
+static void gfs2_log_shutdown(struct gfs2_sbd *sdp);
+
 /**
  * gfs2_struct2blk - compute stuff
  * @sdp: the filesystem
@@ -949,7 +951,7 @@ void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
  *
  */
 
-void gfs2_log_shutdown(struct gfs2_sbd *sdp)
+static void gfs2_log_shutdown(struct gfs2_sbd *sdp)
 {
 	gfs2_assert_withdraw(sdp, !sdp->sd_log_blks_reserved);
 	gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke);

fs/gfs2/log.h

@@ -74,7 +74,6 @@ extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
 extern void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
 extern void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc);
 
-extern void gfs2_log_shutdown(struct gfs2_sbd *sdp);
 extern int gfs2_logd(void *data);
 extern void gfs2_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
 extern void gfs2_write_revokes(struct gfs2_sbd *sdp);