From: Pavel Emelyanov <xemul@openvz.org>

The __mandatory_lock(inode) macro makes the same check, but makes the code
more readable.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/nfs/file.c |    3 +--
 1 files changed, 1 insertion(+), 2 deletions(-)

diff -puN fs/nfs/file.c~nfs-cleanup-explicit-check-for-mandatory-locks fs/nfs/file.c
--- a/fs/nfs/file.c~nfs-cleanup-explicit-check-for-mandatory-locks
+++ a/fs/nfs/file.c
@@ -605,8 +605,7 @@ static int nfs_lock(struct file *filp, i
 	nfs_inc_stats(inode, NFSIOS_VFSLOCK);
 
 	/* No mandatory locks over NFS */
-	if ((inode->i_mode & (S_ISGID | S_IXGRP)) == S_ISGID &&
-	    fl->fl_type != F_UNLCK)
+	if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
 		return -ENOLCK;
 
 	if (IS_GETLK(cmd))
_