linux-kernel - Re: [PATCH v4 4/7] list.h: Replace kernel.h with the necessary inclusions

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Message-ID: <20211007171635.2f161739@jic23-huawei>
Date:   Thu, 7 Oct 2021 17:16:35 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Brendan Higgins <brendanhiggins@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        kunit-dev@...glegroups.com, linux-media@...r.kernel.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>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        linux@...musvillemoes.dk,
        Thorsten Leemhuis <regressions@...mhuis.info>
Subject: Re: [PATCH v4 4/7] list.h: Replace kernel.h with the necessary
 inclusions

On Thu,  7 Oct 2021 18:44:04 +0300
Andy Shevchenko <andriy.shevchenko@...ux.intel.com> wrote:

> When kernel.h is used in the headers it adds a lot into dependency hell,
> especially when there are circular dependencies are involved.
> 
> Replace kernel.h inclusion with the list of what is really being used.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  include/linux/list.h | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/include/linux/list.h b/include/linux/list.h
> index f2af4b4aa4e9..5dc679b373da 100644
> --- a/include/linux/list.h
> +++ b/include/linux/list.h
> @@ -2,11 +2,13 @@
>  #ifndef _LINUX_LIST_H
>  #define _LINUX_LIST_H
>  
> +#include <linux/container_of.h>
> +#include <linux/const.h>
>  #include <linux/types.h>
>  #include <linux/stddef.h>
>  #include <linux/poison.h>

Is there a reason you didn't quite sort this into alphabetical order?

> -#include <linux/const.h>
> -#include <linux/kernel.h>
> +
> +#include <asm/barrier.h>
>  
>  /*
>   * Circular doubly linked list implementation.