Re: [Xen-devel] [PATCH] Input: xen-kbdfront - allow better run-time configuration

[Oleksandr Andrushchenko <andr2000@xxxxxxxxx>]

On 04/19/2018 04:19 PM, Juergen Gross wrote:
> On 19/04/18 15:12, Oleksandr Andrushchenko wrote:
> > On 04/19/2018 04:10 PM, Jason Andryuk wrote:
> > > On Thu, Apr 19, 2018 at 9:01 AM, Oleksandr Andrushchenko
> > > <andr2000@xxxxxxxxx> wrote:
> > > > Ok, so I'll send v2 with the following changes:
> > > >
> > > > diff --git a/drivers/input/misc/xen-kbdfront.c
> > > > b/drivers/input/misc/xen-kbdfront.c
> > > > index a3306aad40b0..d8cca212f737 100644
> > > > --- a/drivers/input/misc/xen-kbdfront.c
> > > > +++ b/drivers/input/misc/xen-kbdfront.c
> > > > @@ -51,13 +51,13 @@ module_param_array(ptr_size, int, NULL, 0444);
> > > >    MODULE_PARM_DESC(ptr_size,
> > > >           "Pointing device width, height in pixels (default 800,600)");
> > > >
> > > > -static unsigned int no_ptr_dev;
> > > > -module_param(no_ptr_dev, uint, 0);
> > > > +static bool no_ptr_dev;
> > > > +module_param(no_ptr_dev, bool, 0);
> > > >    MODULE_PARM_DESC(no_ptr_dev,
> > > >           "If set then no virtual pointing device exposed to the guest");
> > > >
> > > > -static unsigned int no_kbd_dev;
> > > > -module_param(no_kbd_dev, uint, 0);
> > > > +static bool no_kbd_dev;
> > > > +module_param(no_kbd_dev, bool, 0);
> > > >    MODULE_PARM_DESC(no_kbd_dev,
> > > >           "If set then no virtual keyboard device exposed to the guest");
> > > I prefer direct logic over inverse logic.  Maybe just use kbd_dev,
> > > default to true, but allow it to be set off?
> > >
> > > static bool kbd_dev = true;
> > > module_param(kbd_dev, bool, 0);
> > I have no preference here, either way works for me
> > Juergen, what do you think about the above?
> I really have no preference here. What should be taken into account is
> that boolean parameters don't need a value, meaning "true" in that case.
> This would make no sense for "kbd_dev" as it wouldn't change the
> default.
Then I'll go with the diff above, e.g. boolean no_{kbd|ptr})dev
> Juergen

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