linux-kernel - Re: [Y2038] [PATCH 10/24] compat_ioctl: cdrom: handle CDROM_LAST

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Date:   Tue, 17 Dec 2019 22:38:58 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Ben Hutchings <ben.hutchings@...ethink.co.uk>
Cc:     Jens Axboe <axboe@...nel.dk>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        linux-block <linux-block@...r.kernel.org>,
        Jonathan Corbet <corbet@....net>,
        y2038 Mailman List <y2038@...ts.linaro.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Diego Elio Pettenò <flameeyes@...meeyes.com>,
        Hannes Reinecke <hare@...e.de>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Martin Wilck <mwilck@...e.com>,
        Guenter Roeck <linux@...ck-us.net>
Subject: Re: [Y2038] [PATCH 10/24] compat_ioctl: cdrom: handle CDROM_LAST_WRITTEN

On Tue, Dec 17, 2019 at 4:20 PM Ben Hutchings
<ben.hutchings@...ethink.co.uk> wrote:
>
> On Wed, 2019-12-11 at 21:42 +0100, Arnd Bergmann wrote:
> > This is the only ioctl command that does not have a proper
> > compat handler. Making the normal implementation do the
> > right thing is actually very simply, so just do that by
> > using an in_compat_syscall() check to avoid the special
> > case in the pkcdvd driver.
> [...]
>
> Since this uses blkdev_compat_ptr_ioctl() it needs to be moved after
> the following patch.
>

Ah right, I obviously reshuffled my patches too much to end up
with the most reasonable order and avoid introducing something
that would be removed again later.

I'll split out the addition of blkdev_compat_ptr_ioctl() into a separate
patch and move that all in front, as I'm no longer sure if there
was another dependency in the other way.

Thanks!

        Arnd