linux-kernel - Re: [PATCH 0/2] locking/qspinlock: Break qspinlock

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Message-ID: <20200729124744.GC2638@hirez.programming.kicks-ass.net>
Date:   Wed, 29 Jul 2020 14:47:44 +0200
From:   peterz@...radead.org
To:     Herbert Xu <herbert@...dor.apana.org.au>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Petr Mladek <pmladek@...e.com>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        "Steven Rostedt (VMware)" <rostedt@...dmis.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, Waiman Long <longman@...hat.com>
Subject: Re: [PATCH 0/2] locking/qspinlock: Break qspinlock_types.h header
 loop

On Wed, Jul 29, 2020 at 10:28:07PM +1000, Herbert Xu wrote:
> This miniseries breaks a header loop involving qspinlock_types.h.
> The issue is that qspinlock_types.h includes atomic.h, which then
> eventually includes kernel.h which could lead back to the original
> file via spinlock_types.h.

How did you run into this, I haven't seen any build failures due to
this.

> The first patch moves ATOMIC_INIT into linux/types.h while the second
> patch actuallys breaks the loop by no longer including atomic.h
> in qspinlock_types.h.

Anyway, the patches look sane enough, I'll go stick them in
tip/locking/core or somesuch.