[XFS] xfs_unmountfs should return void

xfs_unmounts can't and shouldn't return errors so declare it as returning
void.

SGI-PV: 981498

SGI-Modid: xfs-linux-melb:xfs-kern:31833a
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

fs/xfs/xfs_mount.c

@@ -1229,16 +1229,15 @@ xfs_mountfs(
 }
 
 /*
- * xfs_unmountfs
- *
  * This flushes out the inodes,dquots and the superblock, unmounts the
  * log and makes sure that incore structures are freed.
  */
-int
-xfs_unmountfs(xfs_mount_t *mp)
+void
+xfs_unmountfs(
+	struct xfs_mount	*mp)
 {
 	__uint64_t		resblks;
-	int		error = 0;
+	int			error;
 
 	IRELE(mp->m_rootip);
 
@@ -1311,7 +1310,6 @@ xfs_unmountfs(xfs_mount_t *mp)
 	xfs_errortag_clearall(mp, 0);
 #endif
 	xfs_mount_free(mp);
-	return 0;
 }
 
 STATIC void

fs/xfs/xfs_mount.h

@@ -513,7 +513,7 @@ extern int	xfs_log_sbcount(xfs_mount_t *, uint);
 extern int	xfs_mountfs(xfs_mount_t *mp);
 extern void	xfs_mountfs_check_barriers(xfs_mount_t *mp);
 
-extern int	xfs_unmountfs(xfs_mount_t *);
+extern void	xfs_unmountfs(xfs_mount_t *);
 extern int	xfs_unmountfs_writesb(xfs_mount_t *);
 extern int	xfs_unmount_flush(xfs_mount_t *, int);
 extern int	xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);