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

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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.

Juergen
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