linux-kernel - Re: [PATCH] gpio: remove const modifier from gpiod_get

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Date:	Tue, 25 Nov 2014 17:09:03 +0900
From:	Alexandre Courbot <acourbot@...dia.com>
To:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
CC:	Linus Walleij <linus.walleij@...aro.org>,
	<linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<gnurou@...il.com>
Subject: Re: [PATCH] gpio: remove const modifier from gpiod_get_direction()

On 11/25/2014 05:01 PM, Uwe Kleine-König wrote:
> Hello Alexandre,
>
> just some minor nitpicking on the commit log:
>
> On Tue, Nov 25, 2014 at 04:20:45PM +0900, Alexandre Courbot wrote:
>> Although gpiod_get_direction() can be considered side-effect free for
>> consumers, its internals involve setting or clearing bits in the
>> affected GPIO descriptor, for which we need to force-cast the const
>> descriptor parameter. This could lead to incorrect behavior is the
> s/ is/ if/, and I think s/parameter/variable to non-const/
>
>> compiler decide to optimize here, so remove this const parameter. The
> s/decide/decides/; s/parameter/attribute/
>
>> intent is to make gpiod_get_direction() private anyway, so it does not
>> really matter.
>>
>> Reported-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> Acked-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

Thanks ; I should have proof-read myself...

Sending a v2 with a fixed log and your Ack so Linus can just pick the 
patch as-is.
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