NFS: Fix an f_mode/f_flags confusion in fs/nfs/write.c

O_SYNC is stored in filp->f_flags.
Thanks to Al Viro for pointing out the bug.

Signed-off-by: Trond Myklebust <[e-mail]>

fs/nfs/write.c

···
 	 */
 	if (nfs_write_pageuptodate(page, inode) &&
 			inode->i_flock == NULL &&
-			!(file->f_mode & O_SYNC)) {
+			!(file->f_flags & O_SYNC)) {
 		count = max(count + offset, nfs_page_length(page));
 		offset = 0;
 	}