xfs: cleanup log unmount handling

Kill the current xfs_log_unmount wrapper and opencode the two function
calls in the only caller.  Rename the current xfs_log_unmount_dealloc to
xfs_log_unmount as it undoes xfs_log_mount and the new name makes that
more clear.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>

fs/xfs/xfs_log.c

@@ -634,19 +634,6 @@ xfs_log_mount_finish(xfs_mount_t *mp)
 	return error;
 }
 
-/*
- * Unmount processing for the log.
- */
-int
-xfs_log_unmount(xfs_mount_t *mp)
-{
-	int		error;
-
-	error = xfs_log_unmount_write(mp);
-	xfs_log_unmount_dealloc(mp);
-	return error;
-}
-
 /*
  * Final log writes as part of unmount.
  *
@@ -797,7 +784,7 @@ xfs_log_unmount_write(xfs_mount_t *mp)
  * and deallocate the log as the aild references the log.
  */
 void
-xfs_log_unmount_dealloc(xfs_mount_t *mp)
+xfs_log_unmount(xfs_mount_t *mp)
 {
 	xfs_trans_ail_destroy(mp);
 	xlog_dealloc_log(mp->m_log);

fs/xfs/xfs_log.h

@@ -170,9 +170,8 @@ int	  xfs_log_write(struct xfs_mount *mp,
 			int		 nentries,
 			xfs_log_ticket_t ticket,
 			xfs_lsn_t	 *start_lsn);
-int	  xfs_log_unmount(struct xfs_mount *mp);
 int	  xfs_log_unmount_write(struct xfs_mount *mp);
-void      xfs_log_unmount_dealloc(struct xfs_mount *mp);
+void      xfs_log_unmount(struct xfs_mount *mp);
 int	  xfs_log_force_umount(struct xfs_mount *mp, int logerror);
 int	  xfs_log_need_covered(struct xfs_mount *mp);
 

fs/xfs/xfs_mount.c

@@ -1194,7 +1194,7 @@ xfs_mountfs(
  out_rele_rip:
 	IRELE(rip);
  out_log_dealloc:
-	xfs_log_unmount_dealloc(mp);
+	xfs_log_unmount(mp);
  out_free_perag:
 	xfs_free_perag(mp);
  out_remove_uuid:
@@ -1280,7 +1280,8 @@ xfs_unmountfs(
 				"Freespace may not be correct on next mount.");
 	xfs_unmountfs_writesb(mp);
 	xfs_unmountfs_wait(mp); 		/* wait for async bufs */
-	xfs_log_unmount(mp);			/* Done! No more fs ops. */
+	xfs_log_unmount_write(mp);
+	xfs_log_unmount(mp);
 
 	if ((mp->m_flags & XFS_MOUNT_NOUUID) == 0)
 		uuid_table_remove(&mp->m_sb.sb_uuid);