xfs: remove XFS_MOUNT_NO_PERCPU_SB

Fail the mount if we can't allocate memory for the per-CPU counters.
This is consistent with how we handle everything else in the mount
path and makes the superblock counter modification a lot simpler.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>

fs/xfs/linux-2.6/xfs_super.c

@@ -1518,8 +1518,9 @@ xfs_fs_fill_super(
 	if (error)
 		goto out_free_fsname;
 
-	if (xfs_icsb_init_counters(mp))
-		mp->m_flags |= XFS_MOUNT_NO_PERCPU_SB;
+	error = xfs_icsb_init_counters(mp);
+	if (error)
+		goto out_close_devices;
 
 	error = xfs_readsb(mp, flags);
 	if (error)
@@ -1580,6 +1581,7 @@ xfs_fs_fill_super(
 	xfs_freesb(mp);
  out_destroy_counters:
 	xfs_icsb_destroy_counters(mp);
+ out_close_devices:
 	xfs_close_devices(mp);
  out_free_fsname:
 	xfs_free_fsname(mp);