From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julia Lawall Subject: Re: [PATCH 4/11] use ether_addr_equal_64bits Date: Mon, 6 Jan 2014 10:20:25 +0100 (CET) Message-ID: References: <1388427307-8691-1-git-send-email-Julia.Lawall@lip6.fr> <1388427307-8691-5-git-send-email-Julia.Lawall@lip6.fr> <1388429761.4410.1.camel@jlt4.sipsolutions.net> <1388438724.4573.2.camel@jlt4.sipsolutions.net> <20131230215701.GA4938@khazad-dum.debian.net> <1388445188.18164.0.camel@jlt4.sipsolutions.net> <1388445422.26796.38.camel@joe-AO722> <1388998750.5808.43.camel@joe-AO722> <1388999220.5891.3.camel@jlt4.sipsolutions.net> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Cc: Julia Lawall , Joe Perches , Henrique de Moraes Holschuh , kernel-janitors@vger.kernel.org, Emmanuel Grumbach , Intel Linux Wireless , "John W. Linville" , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org To: Johannes Berg Return-path: In-Reply-To: <1388999220.5891.3.camel@jlt4.sipsolutions.net> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Mon, 6 Jan 2014, Johannes Berg wrote: > On Mon, 2014-01-06 at 10:04 +0100, Julia Lawall wrote: > > > OK, the question was expressed badly. Is there any way to use the value > > to trigger an action at build time? The only way I kow to trigger an > > action is with #error, but #error is processed by cpp, which doesn't know > > about the size of types. > > That's exactly BUILD_BUG_ON(), I believe. Maybe BUILD_BUG_ON_ZERO? It's goal seems to be to return an integer, which could then be used as an array size in a dummy structure. The structure declaration would not generate any code. The structure would have to have a name, thoough. julia