From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Gao Feng" <gfree.wind@vip.163.com>
Date: Tue, 08 Aug 2017 13:16:33 +0000
Subject: Re:[PATCH net] ppp: fix xmit recursion detection on ppp channels
Message-Id: <5a62fd3f.e0c3.15dc1fd5f1b.Coremail.gfree.wind@vip.163.com>
List-Id: <linux-ppp.vger.kernel.org>
References: <e45ed6ea02e2665ec8b868279ad9afcb9b34fc81.1502185216.git.g.nault@alphalink.fr>
In-Reply-To: <e45ed6ea02e2665ec8b868279ad9afcb9b34fc81.1502185216.git.g.nault@alphalink.fr>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
To: Guillaume Nault <g.nault@alphalink.fr>
Cc: netdev@vger.kernel.org, Liu Jianying <jianying.liu@ikuai8.com>, David Miller <davem@davemloft.net>, linux-ppp@vger.kernel.org, Paul Mackerras <paulus@samba.org>
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