linux-kernel - Re: [PATCH 0/3] module: Allow parameters without arguments

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Message-ID: <CAKi4VAKBYBUH+=yioR7B8W06ZxeA=Fs05GGhJFD6csys48neRQ@mail.gmail.com>
Date:	Tue, 13 Aug 2013 22:00:53 -0300
From:	Lucas De Marchi <lucas.de.marchi@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 0/3] module: Allow parameters without arguments

On Tue, Aug 13, 2013 at 9:17 PM, Steven Rostedt <rostedt@...dmis.org> wrote:
> On Tue, 13 Aug 2013 20:34:58 -0300
> Lucas De Marchi <lucas.de.marchi@...il.com> wrote:
>
>
>> so in kcmdline we would have modulename.param instead of modulename.param=1?
>>
>> I guess we need to update kmod then, because currently we ignore and
>> treat this case as a wrong token. From a quick look, allowing it in
>> kmod would be as simple as removing a condition check.
>>
>> Lucas De Marchi
>
> Note, both will still work. And it didn't change much. Today, anything
> that uses "module_param()" with bool type (a quick git grep shows 570
> users), already do not require a value.
>
> Randomly looking at one... drivers/input/mouse/synaptics_i2c.c, you can
> just do:
>
>  insmod synaptics_i2c.ko no_filter
>
> no need to add a "=1" to that.
>
> But anything else will still require a value. I just want to allow
> other parameters that act like a boolean to not require one.

true... but currently "modprobe synaptics_i2c" doesn't get the
parameter correctly from kernel command line if it doesn't have a
value. And I agree this not something that changed but rather a bug in
kmod waiting to be fixed.

Lucas De Marchi
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