linux-kernel - Re: [PATCH] staging/iio: Use correct argument for sizeof

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Date:	Tue, 22 Jan 2013 11:05:26 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Lars-Peter Clausen <lars@...afoo.de>
Cc:	devel@...verdev.osuosl.org, linux-iio@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, Jonathan Cameron <jic23@....ac.uk>
Subject: Re: [PATCH] staging/iio: Use correct argument for sizeof

On Tue, Jan 22, 2013 at 09:02:05AM +0100, Lars-Peter Clausen wrote:
> On 01/22/2013 07:43 AM, Dan Carpenter wrote:
> > On Mon, Jan 21, 2013 at 10:14:02PM +0100, Peter Huewe wrote:
> >> found with coccicheck
> >> sizeof when applied to a pointer typed expression gives the size of
> >> the pointer
> >>
> > 
> > The original code is correct, in this case.  We're storing an array
> > of pointers and the last element in the array is a NULL.
> > 
> 
> The patch changed sizeof(st->attrs) to sizeof(*st->attrs). The type of
> st->attrs is struct attribute **, so both sizeofs return the same value (the
> size of an pointer) and the code happens to work, still the later is
> semantically more correct.
> 

Yeah.  You're right, my bad.  The patch is fine.

regards,
dan carpenter

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