NFS: NFS_INO_REVAL_PAGECACHE should mark the change attribute invalid

When we're looking to revalidate the page cache, we should just ensure
that we mark the change attribute invalid.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

fs/nfs/inode.c

@@ -219,7 +219,8 @@ void nfs_set_cache_invalid(struct inode *inode, unsigned long flags)
 				| NFS_INO_INVALID_SIZE
 				| NFS_INO_REVAL_PAGECACHE
 				| NFS_INO_INVALID_XATTR);
-	}
+	} else if (flags & NFS_INO_REVAL_PAGECACHE)
+		flags |= NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_SIZE;
 
 	if (!nfs_has_xattr_cache(nfsi))
 		flags &= ~NFS_INO_INVALID_XATTR;