linux-kernel - Re: [PATCH v2 10/11] gpiolib: add new ioctl() for monitoring changes in line info

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Date:   Thu, 5 Dec 2019 19:02:21 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Kent Gibson <warthog618@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 10/11] gpiolib: add new ioctl() for monitoring changes
 in line info

On Thu, Dec 5, 2019 at 3:47 PM Bartosz Golaszewski <brgl@...ev.pl> wrote:
> czw., 5 gru 2019 o 11:27 Andy Shevchenko <andy.shevchenko@...il.com> napisał(a):
> > On Thu, Dec 5, 2019 at 11:42 AM Bartosz Golaszewski
> > <bgolaszewski@...libre.com> wrote:
> > > śr., 4 gru 2019 o 23:34 Andy Shevchenko <andy.shevchenko@...il.com> napisał(a):
> > > > On Wed, Dec 4, 2019 at 6:03 PM Bartosz Golaszewski <brgl@...ev.pl> wrote:

> > So, the test cases, I can imagine of, should include (k - kernel, u - user):
> > - 64k-64u: LE and BE
> > - 64k-32u: LE and BE
> > - 32k-32u: LE and BE
>
> I usually use qemu VMs built with yocto for testing but I don't see
> any way of creating a 32-bit user-space with 64-bit kernel. Any ideas
> on how to prepare a testing environment?

In my case it's very easy. I do
- compile kernel as 64-bit separately;
- compile initramfs of Buildroot distro with external kernel build provided.

That's setup in which I observed the issue.

-- 
With Best Regards,
Andy Shevchenko