linux-kernel - Re: [PATCH] HID: roccat: Drop cast

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Message-ID: <1403848366.7977.92.camel@joe-AO725>
Date:	Thu, 26 Jun 2014 22:52:46 -0700
From:	Joe Perches <joe@...ches.com>
To:	Julia Lawall <julia.lawall@...6.fr>
Cc:	Himangi Saraogi <himangi774@...il.com>,
	Stefan Achatz <erazor_de@...rs.sourceforge.net>,
	Jiri Kosina <jkosina@...e.cz>, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] HID: roccat: Drop cast

On Fri, 2014-06-27 at 07:29 +0200, Julia Lawall wrote:
> On Thu, 26 Jun 2014, Joe Perches wrote:
> > The cast of a const void * to a void * was odd.
> > 
> > Maybe a mechanism to verify appropriateness of
> > loss of constness for any pointer might be useful.
> 
> I tried the following, but didn't find anything interesting:
> 
> @disable drop_cast@
> type T;
> const T e;
> @@
> 
> * (T)e

What code does this match?
Do you have an example match?

This doesn't find a cast of a void type like:

void func(const void * const p)
{
	char *p2 = p;

	p2[0] = 1;
}


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