linux-kernel - Re: [PATCH 4/4 v2] firmware: stratix10-svc: Slightly simplify code

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Date:   Wed, 6 May 2020 13:04:53 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Richard Gong <richard.gong@...ux.intel.com>
Cc:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        gregkh@...uxfoundation.org, atull@...nel.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 4/4 v2] firmware: stratix10-svc: Slightly simplify code

On Fri, May 01, 2020 at 10:40:20AM -0500, Richard Gong wrote:
> Hi,
> 
> On 4/29/20 1:52 AM, Christophe JAILLET wrote:
> > Replace 'devm_kmalloc_array(... | __GFP_ZERO)' with the equivalent and
> > shorter 'devm_kcalloc(...)'.
> > 
> It doesn't make much sense.
> Actually devm_kcalloc returns devm_kmalloc_array(.., flag | __GFP_ZERO).
> 

devm_kcalloc() is better style and easier to read.  I was just reading
a bunch of AMD code that does this and I almost complained to them
that devm_kmalloc_array() doesn't zero the memory so they were freeing
uninitialized pointers.

regards,
dan carpenter