netdev - Re: [PATCH net-next-2.6] net: inet_add

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Date:	Thu, 9 Sep 2010 07:24:53 +0000
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>, jesse@...ira.com,
	netdev@...r.kernel.org
Subject: Re: [PATCH net-next-2.6] net: inet_add_protocol() can use cmpxchg()

On Thu, Sep 09, 2010 at 07:09:26AM +0000, Jarek Poplawski wrote:
> On Thu, Sep 09, 2010 at 08:55:45AM +0200, Eric Dumazet wrote:
> > Le jeudi 09 septembre 2010 ?? 06:42 +0000, Jarek Poplawski a écrit :
> > > Of course, each case is different, but generally I understand Jesse's
> > > concern. Smaller data section argument shouldn't be enough. There is
> > > some reason we do it in C not asm, and there is some cost of
> > > unreadable code too.
> > 
> > Sure, but is cmpxchg() really not readable for you ? ;)
> 
> Just like for Jesse: "this takes a little more thought". ;-)

But more exactly, it's not about this one line, but the time you need
when reading this after some time to tell: yes, this place is properly
locked for sure.

Jarek P.
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