linux-kernel - Re: [PATCH v1 3/3] kernel.h: Split out container_of() and typeof

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Message-ID: <20210713121944.GA24157@gondor.apana.org.au>
Date:   Tue, 13 Jul 2021 20:19:45 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Brendan Higgins <brendanhiggins@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        kunit-dev@...glegroups.com, linux-media@...r.kernel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Waiman Long <longman@...hat.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, Thomas Graf <tgraf@...g.ch>,
        Andrew Morton <akpm@...ux-foundation.org>, jic23@...nel.org,
        linux@...musvillemoes.dk
Subject: Re: [PATCH v1 3/3] kernel.h: Split out container_of() and
 typeof_memeber() macros

On Tue, Jul 13, 2021 at 01:23:01PM +0200, Greg Kroah-Hartman wrote:
>
> Life is messy and can not easily be partitioned into tiny pieces.  That
> way usually ends up being even messier in the end...

One advantage is less chance of header loops which very often
involve kernel.h and one of the most common reasons for other
header files to include kernel.h is to access container_of.

However, I don't see much point in touching *.c files that include
kernel.h.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt