Date: Fri, 27 Jul 2012 16:47:15 +0700 From: Erich Dollansky <erichfreebsdlist@ovitrap.com> To: Luigi Rizzo <rizzo@iet.unipi.it> Cc: current@freebsd.org Subject: Re: (void)foo or __unused foo ? Message-ID: <20120727164715.51ba740d@AMD620.ovitrap.com> In-Reply-To: <20120727093824.GB56662@onelab2.iet.unipi.it> References: <20120727093824.GB56662@onelab2.iet.unipi.it>
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Hi, On Fri, 27 Jul 2012 11:38:24 +0200 Luigi Rizzo <rizzo@iet.unipi.it> wrote: > In writing cross platform code I often have to deal with function > arguments or variables that are not used on certain platforms. > In FreeBSD:sys/cdefs.h we have > if I understand you right here, it is you own code that has to run on different platforms. I can only tell what we are doing since a long long time. We have one file which handles all these things in one central location. This makes all other files independent of the platform but this one file might needs some work when a new platform comes in or things change on one platform. > Any disadvantage or objection to selectively use this form > in our kernel code for parts that need to work on multiple > platforms ? This concept also works inside a kernel, driver or in the world. The concept should then be limited to the module. Erich
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