linux-kernel - Re: [PATCH 1/1] bug: fix problem including <linux.bug.h> from linux/kernel.h

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Date:   Wed, 24 May 2017 16:55:15 +0100
From:   Ian Abbott <abbotti@....co.uk>
To:     Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:     linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        Arnd Bergmann <arnd@...db.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Nazarewicz <mina86@...a86.com>,
        Hidehiro Kawai <hidehiro.kawai.ez@...achi.com>,
        Borislav Petkov <bp@...e.de>,
        Johannes Berg <johannes.berg@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Alexander Potapenko <glider@...gle.com>
Subject: Re: [PATCH 1/1] bug: fix problem including <linux.bug.h> from
 linux/kernel.h

On 24/05/17 14:37, Rasmus Villemoes wrote:
> On 24 May 2017 at 15:21, Ian Abbott <abbotti@....co.uk> wrote:
>> If "include/linux/kernel.h" includes <linux/bug.h>, a circular
>> dependency is introduced
>
> Then don't. Can't we just create linux/build_bug.h and have that
> contain the BUILD_BUG related macros - they're really completely
> unrelated to all the asm-cruft bug.h needs to know about. build_bug.h
> can then include compiler.h and not much else to figure out how it may
> implement its macros. Then kernel.h can include build_bug.h, and we
> don't force each and every translation unit to include bug.h and
> everything that then pulls in. We just got rid of a lot of header
> bloat, let's try to keep it that way.

Thanks, I'll take a look at that.  In the meantime, I noticed the title 
line of this patch contains a nasty typo, so I'll send a v2 patch to fix 
that.

-- 
-=( Ian Abbott @ MEV Ltd.    E-mail: <abbotti@....co.uk> )=-
-=(                          Web: http://www.mev.co.uk/  )=-