linux-kernel - Re: [PATCH 2/7] regmap: Make reg_config reg

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Date:	Wed, 16 Nov 2011 18:20:28 +0100
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
CC:	Dimitris Papastamos <dp@...nsource.wolfsonmicro.com>,
	Jonathan Cameron <jic23@...nel.org>,
	Michael Hennerich <michael.hennerich@...log.com>,
	linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
	device-drivers-devel@...ckfin.uclinux.org, drivers@...log.com
Subject: Re: [PATCH 2/7] regmap: Make reg_config reg_defaults const

On 11/16/2011 06:09 PM, Mark Brown wrote:
> On Wed, Nov 16, 2011 at 06:01:40PM +0100, Lars-Peter Clausen wrote:
>> On 11/16/2011 05:51 PM, Mark Brown wrote:
> 
>>> None of them, I just changed the code to make the defaults const - I'm
>>> just reviewing by eyeball as I'm well aware of the fact that this isn't
>>> const.
> 
>> So you only applied part of the patch and are complaining that it you get an
>> error?
> 
> I'm saying that the way we're using the reg_defaults is unfortunately
> excessively cute right now so just by looking at the code I'm able to
> see that there's an issue having done the same change before but not
> applied it due to the cuteness.  I only did a code mod to generate the
> warnings since you weren't seeing any issue.

Sorry, I can't follow you anymore. Do you still see a problem with the patch
as it is, and if yes why?

We never ever modify reg_defaults of the reg_config we only ever modify the
reg_defaults of the regmap struct which is always runtime allocated. In the
case the config contains reg_defaults it is kmemdup'd into the reg_defaults
of the regmap struct.

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