linux-kernel - Re: [PATCH] compiler.h: fix error in BUILD_BUG

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Message-ID: <123d3606-cebf-4261-4b04-7d53d1fcdb07@prevas.dk>
Date:   Tue, 31 Mar 2020 20:56:49 +0200
From:   Rasmus Villemoes <rasmus.villemoes@...vas.dk>
To:     Joe Perches <joe@...ches.com>,
        Vegard Nossum <vegard.nossum@...cle.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org,
        Daniel Santos <daniel.santos@...ox.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Ian Abbott <abbotti@....co.uk>
Subject: Re: [PATCH] compiler.h: fix error in BUILD_BUG_ON() reporting

On 31/03/2020 20.20, Joe Perches wrote:
> On Tue, 2020-03-31 at 13:26 +0200, Vegard Nossum wrote:

>>  #define compiletime_assert(condition, msg) \
>> -	_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
>> +	_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
> 
> This might be better using something like __LINE__ ## _ ## __COUNTER__
> 
> as line # is somewhat useful to identify the specific assert in a file.
> 

Eh, if the assert fires, doesn't the compiler's diagnostics already
contain all kinds of location information?

Rasmus