linux-kernel - Re: [PATCH v7 1/3] llist: Add a lock-less list variant terminated by a sentinel node

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Date:   Mon, 3 Oct 2022 10:15:24 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Waiman Long <longman@...hat.com>
Cc:     Jens Axboe <axboe@...nel.dk>, cgroups@...r.kernel.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ming Lei <ming.lei@...hat.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Koutný <mkoutny@...e.com>
Subject: Re: [PATCH v7 1/3] llist: Add a lock-less list variant terminated by
 a sentinel node

Hello,

On Mon, Oct 03, 2022 at 03:39:02PM -0400, Waiman Long wrote:
> There are 123 instances where llist_head is referenced in arch, driver,
> filesystem and kernel code. Going through all these to make sure that it
> will all work will be a major effort. I think it will be safer to allow both
> NULL and the sentinel node as the initializers and gradually convert them to
> use the proper llist APIs over time to complete the conversion. I am sorry
> that I can't spend that much time upfront for this conversion effort.

I see. Oh well, thanks for taking a look.

-- 
tejun