linux-kernel - Re: Make checkpatch warn about pointless casting of kalloc returns.

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Date:	Wed, 8 Aug 2007 14:00:56 -0400
From:	Dave Jones <davej@...hat.com>
To:	jschopp <jschopp@...tin.ibm.com>
Cc:	apw@...dowen.org, rdunlap@...otime.net,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: Make checkpatch warn about pointless casting of kalloc returns.

On Wed, Aug 08, 2007 at 12:05:13PM -0500, jschopp wrote:
 > > +# check for pointless casting of kmalloc return
 > > +		if ($rawline =~ /\*\)[ ]k[czm]alloc/) {
 > 
 > It looks to me like this will catch
 > 
 > foo = (char *) kmalloc(512);
 > 
 > but not
 > 
 > for = (char* )kmalloc(512);
 > 
 > I haven't tried it but how about something like:
 > 
 > if($rawline =~/\(.*\)\s*k[czm]alloc/){

Hmm,  could even just drop the check for the '*'
)[ ]k.. should be good enough.

 > which if I got it right should match the typecast with any combination of spacing.
 > 
 > > +			WARN("No need to cast return value.\n");
 > 
 > Could the warning be more descriptive?  This describes what, but it should also describe 
 > why; after all if somebody made this error they may not know they why.

I'm open to suggestions..

	Dave

-- 
http://www.codemonkey.org.uk
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