[XFS] kill sys_cred

capable_cred has been unused for a while so we can kill it and sys_cred.
That also means the cred argument to xfs_setattr and xfs_change_file_space
can be removed now.

SGI-PV: 988918

SGI-Modid: xfs-linux-melb:xfs-kern:32412a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tim Shimmin <tes@sgi.com>
Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
index d3438c7..b5ea3f2 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -691,8 +691,7 @@
 	if (ioflags & IO_INVIS)
 		attr_flags |= XFS_ATTR_DMI;
 
-	error = xfs_change_file_space(ip, cmd, &bf, filp->f_pos,
-					      NULL, attr_flags);
+	error = xfs_change_file_space(ip, cmd, &bf, filp->f_pos, attr_flags);
 	return -error;
 }