Re: [PATCH v5 05/18] watchdog: cpwd: use generic compat_ptr_ioctl

From: Arnd Bergmann
Date: Tue Oct 08 2019 - 03:38:52 EST

On Tue, Oct 8, 2019 at 1:30 AM Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
> On Wed, Aug 14, 2019 at 10:42:32PM +0200, Arnd Bergmann wrote:
> > The cpwd_compat_ioctl() contains a bogus mutex that dates
> > back to a leftover BKL instance.
> >
> > Simplify the implementation by using the new compat_ptr_ioctl()
> > helper function that will do the right thing for all calls
> > here.
> >
> > Note that WIOCSTART/WIOCSTOP don't take any arguments, so
> > the compat_ptr() conversion is not needed here, but it also
> > doesn't hurt.
> >
> > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> > Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> This patch made it into the kernel, but the infrastructure didn't make it.
> Do we need to revert it ?

Sorry I had not realized that this patch got queued in the watchdog tree
and relied on the other patches. I ended up not sending the series after
a runtime regression in another driver, combined with the series not
having spent much time in linux-next before the merge window.

I've sent a fixup patch now that will make it do the right thing
regardless of my series, please apply that for v5.4.