linux-kernel - Re: [PATCH] mfd: axp20x: Remove unnecessary const qualifier from axp20x

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Message-ID: <20140522160856.GJ19747@lee--X1>
Date:	Thu, 22 May 2014 17:08:56 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Joe Perches <joe@...ches.com>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mfd: axp20x: Remove unnecessary const qualifier from
 axp20x_supplies[]

> > drivers/mfd/axp20x.c:159:3:
> >   warning: initialization discards ‘const’ qualifier from pointer target type
> >    .parent_supplies = axp20x_supplies,
> []
> > diff --git a/drivers/mfd/axp20x.c b/drivers/mfd/axp20x.c
> []
> > @@ -140,7 +140,7 @@ static const struct regmap_irq_chip axp20x_regmap_irq_chip = {
> >  	.init_ack_masked	= true,
> >  };
> >  
> > -static const char * const axp20x_supplies[] = {
> > +static const char * axp20x_supplies[] = {
> >  	"acin",
> >  	"vin2",
> >  	"vin3",
> 
> Perhaps you're doing this the wrong way round.
> Maybe this definition should change.
> 
> include/linux/mfd/core.h:       const char              **parent_supplies;

Are you asking me, or telling me? :)

To be frank, I've never known what the double const means.  Care to
enlighten?

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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