NFS: fix nfs_verify_change_attribute

We always want to check that the verifier and directory
cache_change_attribute match. This also allows us to remove the 'wraparound
hack' for the cache_change_attribute. If we're only checking for equality,
then we don't care about wraparound issues.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 5b42fef..f451613 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -277,7 +277,7 @@
 static inline int nfs_verify_change_attribute(struct inode *inode, unsigned long chattr)
 {
 	return !nfs_caches_unstable(inode)
-		&& time_after_eq(chattr, NFS_I(inode)->cache_change_attribute);
+		&& chattr == NFS_I(inode)->cache_change_attribute;
 }
 
 /*