linux-kernel - Re: [PATCH 3/4] kernel: add support for TIF_NOTIFY

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Message-ID: <bdd8ddad-5433-8f54-fbec-20a5f6f8bec2@kernel.dk>
Date:   Tue, 13 Oct 2020 17:54:52 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Oleg Nesterov <oleg@...hat.com>
Cc:     linux-kernel@...r.kernel.org, io-uring@...r.kernel.org,
        peterz@...radead.org
Subject: Re: [PATCH 3/4] kernel: add support for TIF_NOTIFY_SIGNAL

On 10/13/20 5:45 PM, Thomas Gleixner wrote:
> On Fri, Oct 09 2020 at 09:13, Jens Axboe wrote:
>>> Hmm. I just noticed that only x86 uses arch_do_signal(), so perhaps you can
>>> add this change to this patch right now? Up to you.
>>
>> Sure, we can do that. Incremental on top then looks like the below. I don't
>> feel that strongly about it, but it is nice to avoid re-testing the
>> flags.
> 
> Yes it makes sense. Can you please make the signature change of
> arch_do_signal() in a preparatory patch and only make use of it when you
> add the TIF bit to x86?

Ala:

https://git.kernel.dk/cgit/linux-block/commit/?h=tif-task_work&id=6a150da501727f6bdca4786a02c0a57160e13079

with the pre generic patch being:

https://git.kernel.dk/cgit/linux-block/commit/?h=tif-task_work&id=add2e252ae8481350239c3cb893aed490c05c397

-- 
Jens Axboe