From cead89bb08c0f64e23886f1c18df9bb98e97c55c Mon Sep 17 00:00:00 2001
From: hujianyang <hujianyang@huawei.com>
Date: Mon, 24 Nov 2014 18:25:21 +0800
Subject: [PATCH] ovl: Use macros to present ovl_xattr

This patch adds two macros:

OVL_XATTR_PRE_NAME and OVL_XATTR_PRE_LEN

to present ovl_xattr name prefix and its length. Also, a
new macro OVL_XATTR_OPAQUE is introduced to replace old
*ovl_opaque_xattr*.

Fix the length of "trusted.overlay." to *16*.

Signed-off-by: hujianyang <hujianyang@huawei.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
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