linux-kernel - Re: [PATCH 2/5] asm-generic: ticket-lock: New generic ticket-based spinlock

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Date:   Thu, 17 Mar 2022 10:46:01 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Palmer Dabbelt <palmer@...osinc.com>
Cc:     linux-riscv@...ts.infradead.org, jonas@...thpole.se,
        stefan.kristiansson@...nalahti.fi, shorne@...il.com,
        mingo@...hat.com, Will Deacon <will@...nel.org>,
        longman@...hat.com, boqun.feng@...il.com,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>, aou@...s.berkeley.edu,
        Arnd Bergmann <arnd@...db.de>, jszhang@...nel.org,
        wangkefeng.wang@...wei.com, openrisc@...ts.librecores.org,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [PATCH 2/5] asm-generic: ticket-lock: New generic ticket-based
 spinlock

On Wed, Mar 16, 2022 at 04:25:57PM -0700, Palmer Dabbelt wrote:
> From: Peter Zijlstra <peterz@...radead.org>
> 
> This is a simple, fair spinlock.  Specifically it doesn't have all the
> subtle memory model dependencies that qspinlock has, which makes it more
> suitable for simple systems as it is more likely to be correct.
> 
> [Palmer: commit text]
> Signed-off-by: Palmer Dabbelt <palmer@...osinc.com>

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>

> 
> --
> 
> I have specifically not included Peter's SOB on this, as he sent his
> original patch
> <https://lore.kernel.org/lkml/YHbBBuVFNnI4kjj3@hirez.programming.kicks-ass.net/>
> without one.

Fixed ;-)