linux-kernel - Re: [PATCH] s390: add support for TIF_NOTIFY

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Date:   Mon, 02 Nov 2020 16:15:34 -0500
From:   Qian Cai <cai@...hat.com>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     linux-s390@...r.kernel.org, Heiko Carstens <hca@...ux.ibm.com>,
        linux-kernel@...r.kernel.org, peterz@...radead.org,
        oleg@...hat.com, tglx@...utronix.de,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: [PATCH] s390: add support for TIF_NOTIFY_SIGNAL

On Mon, 2020-11-02 at 12:50 -0700, Jens Axboe wrote:
> Ah, but that's because later patches assume that TIF_NOTIFY_SIGNAL is
> always there once all archs have been converted. If you just want to back
> out that patch, you'll need to just revert this one:
> 
> commit 82ef6998ed9d488e56bbfbcc2ec9adf62bf78f08
> Author: Jens Axboe <axboe@...nel.dk>
> Date:   Fri Oct 9 16:04:39 2020 -0600
> 
>     kernel: remove checking for TIF_NOTIFY_SIGNAL
> 
> as well and I suspect it should build.

No, at the minimal, I'll need to revert those to build successfully.

7b074c15374c io_uring: remove 'twa_signal_ok' deadlock work-around
eb48a0f216fa kernel: remove checking for TIF_NOTIFY_SIGNAL
c634e6b63a81 signal: kill JOBCTL_TASK_WORK
f8b667db31a3 io_uring: JOBCTL_TASK_WORK is no longer used by task_work
4c3d9c3b415a s390: add support for TIF_NOTIFY_SIGNAL

Then, it will fix the boot issue as well.