From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <dada1@cosmosbay.com>
Date: Tue, 16 Dec 2008 23:59:00 +0000
Subject: Re: local_add_return
Message-Id: <494840C4.50000@cosmosbay.com>
List-Id: <linux-ia64.vger.kernel.org>
References: <alpine.DEB.1.10.0812150823370.18692@gandalf.stny.rr.com> <200812161703.00697.rusty@rustcorp.com.au> <20081215.231314.92267481.davem@davemloft.net> <200812170908.05423.rusty@rustcorp.com.au>
In-Reply-To: <200812170908.05423.rusty@rustcorp.com.au>
MIME-Version: 1.0
Content-Type: text/plain; charset="macroman"
Content-Transfer-Encoding: base64
To: Rusty Russell <rusty@rustcorp.com.au>
Cc: David Miller <davem@davemloft.net>, rostedt@goodmis.org, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, mathieu.desnoyers@polymtl.ca, paulus@samba.org, benh@kernel.crashing.org, linux-ia64@vger.kernel.org, linux-s390@vger.kernel.org
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