linux-kernel - Re: [PATCH] staging: unisys: kmalloc/memset to kzalloc conversation

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Message-ID: <20140318204124.GB26473@kroah.com>
Date:	Tue, 18 Mar 2014 13:41:24 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Joe Perches <joe@...ches.com>
Cc:	Silvio F <silvio.fricke@...il.com>, linux-kernel@...r.kernel.org,
	daeseok.youn@...il.com, silvio@...t1024.net
Subject: Re: [PATCH] staging: unisys: kmalloc/memset to kzalloc conversation

On Tue, Mar 18, 2014 at 01:17:25PM -0700, Joe Perches wrote:
> On Tue, 2014-03-18 at 21:07 +0100, Silvio F wrote:
> > This patch solves the Coccinelle warning: "kzalloc should be used
> > instead of kmalloc/memset"
> []
> > diff --git a/drivers/staging/unisys/include/uisutils.h b/drivers/staging/unisys/include/uisutils.h
> []
> > @@ -190,10 +190,7 @@ struct chaninfo {
> >  }
> >  
> >  #define ALLOC_CMDRSP(cmdrsp) { \
> > -	cmdrsp = kmalloc(SIZEOF_CMDRSP, GFP_ATOMIC); \
> > -	if (cmdrsp != NULL) { \
> > -		memset(cmdrsp, 0, SIZEOF_CMDRSP); \
> > -	} \
> > +	cmdrsp = kzalloc(SIZEOF_CMDRSP, GFP_ATOMIC); \
> >  }
> 
> It'd be nicer to get rid of this macro altogether
> and substitute kzalloc in the 3 places it's used.

Yes, that's the better thing to do overall.

thanks,

greg k-h
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