linux-kernel - Re: [PATCH v2] locking/qspinlock: Fix inaccessible URL of MCS lock paper

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Date:   Tue, 7 Jan 2020 17:34:43 +0000
From:   Will Deacon <will@...nel.org>
To:     Waiman Long <longman@...hat.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Will Deacon <will.deacon@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>, linux-kernel@...r.kernel.org,
        Konstantin Ryabitsev <konstantin@...uxfoundation.org>
Subject: Re: [PATCH v2] locking/qspinlock: Fix inaccessible URL of MCS lock
 paper

On Tue, Jan 07, 2020 at 10:16:19AM -0500, Waiman Long wrote:
> It turns out that the URL of the MCS lock paper listed in the source
> code is no longer accessible. I did got question about where the paper
> was. This patch updates the URL to BZ 206115 which contains a copy of
> the paper from
> 
>   https://www.cs.rochester.edu/u/scott/papers/1991_TOCS_synch.pdf
> 
> Signed-off-by: Waiman Long <longman@...hat.com>
> ---
>  kernel/locking/qspinlock.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c
> index 2473f10c6956..ce75b2270b58 100644
> --- a/kernel/locking/qspinlock.c
> +++ b/kernel/locking/qspinlock.c
> @@ -31,10 +31,9 @@
>  /*
>   * The basic principle of a queue-based spinlock can best be understood
>   * by studying a classic queue-based spinlock implementation called the
> - * MCS lock. The paper below provides a good description for this kind
> - * of lock.
> + * MCS lock. A copy of the original MCS lock papaer is available at

s/papaer/paper/

I think I reviewed the previous patch as you sent this version, but please
could you reword as suggested here [1]?

Cheers,

Will

[1] https://lore.kernel.org/lkml/20200107172343.GA32009@willie-the-truck/T/#m0f9eaf53e509b87d0f6378e35514c9b120d8edc2