linux-kernel - Re: [PATCH] rcu: avoid checking for constant

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Message-ID: <alpine.LNX.2.01.1201121154530.21275@frira.zrqbmnf.qr>
Date:	Thu, 12 Jan 2012 11:57:10 +0100 (CET)
From:	Jan Engelhardt <jengelh@...ozas.de>
To:	Eric Dumazet <eric.dumazet@...il.com>
cc:	Josh Triplett <josh@...htriplett.org>, paulmck@...ux.vnet.ibm.com,
	laijs@...fujitsu.com, manfred@...orfullife.com,
	dhowells@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rcu: avoid checking for constant

On Thursday 2012-01-12 11:54, Eric Dumazet wrote:

>Le jeudi 12 janvier 2012 à 11:34 +0100, Jan Engelhardt a écrit :
>
>> When compiling kernel or module code with -O0, "offset" is no longer
>> considered a constant, and therefore always triggers the build error
>> that BUILD_BUG_ON is defined to yield.
>
>Why compiling kernel with -O0 is even considered ?

The compile error was observed when trying to compile an out-of-tree 
module with -O0.
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