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

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Message-ID: <5b6dc5760b42af6c07c8ffc789466be7d7da358e.camel@perches.com>
Date:   Fri, 08 Oct 2021 17:59:18 -0700
From:   Joe Perches <joe@...ches.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Jonathan Cameron <jic23@...nel.org>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        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>,
        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, 2021-10-07 at 20:29 +0300, Laurent Pinchart wrote:
> On Thu, Oct 07, 2021 at 05:16:35PM +0100, Jonathan Cameron wrote:
> > On Thu,  7 Oct 2021 18:44:04 +0300 Andy Shevchenko 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.
[]
> > > diff --git 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?
> 
> On a side note, if someone with perle knowledge could add a checkpatch
> warning for this, I think it would be very nice. I'm a bit tired of
> asking for alphabetical order in reviews :-)

As are people that want reverse christmas tree.
Neither of which I will do as I think both are poor form at best.

If you want, this was a checkpatch reverse christmas tree attempt,
as that was more common to some.

https://lore.kernel.org/lkml/1478242438.1924.31.camel@perches.com/