linux-kernel - Re: [PATCH] Staging: comedi: das16: Fixed a const struct coding style issue

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Date:   Tue, 28 Nov 2017 01:36:57 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Hartley Sweeten <HartleyS@...ionengravers.com>
Cc:     Ian Abbott <abbotti@....co.uk>,
        Alex Frappier Lachapelle <alex.frappierlachapelle@...il.com>,
        "greg@...ah.com" <greg@...ah.com>,
        "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Staging: comedi: das16: Fixed a const struct coding
 style issue

On Mon, Nov 27, 2017 at 05:51:56PM +0000, Hartley Sweeten wrote:
> On Monday, November 27, 2017 3:28 AM, Ian Abbott wrote:
> > On 26/11/17 01:50, Alex Frappier Lachapelle wrote:
> >> +		const struct comedi_lrange *lrange;
> >
> > NAK.  The following lines of source code allocate memory pointed to by 'lrange' and modify it, so 'const' is not appropriate here.
> 
> Ian,
> 
> Wonder if it's worth putting a comment about this in the code. This has come up a
> couple times.
> 

Making it const generates a compile error.  A compile error is worth a
thousand comments as they say.

regards,
dan carpenter