linux-kernel - Re: [PATCH] s390/cpum_cf: Use kmalloc_array() in merge

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Message-Id: <20160905113436.GA4502@linux.vnet.ibm.com>
Date:   Mon, 5 Sep 2016 13:34:36 +0200
From:   Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:     linux-s390@...r.kernel.org,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Hendrik Brückner 
        <brueckner@...ux.vnet.ibm.com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        Julia Lawall <julia.lawall@...6.fr>,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: [PATCH] s390/cpum_cf: Use kmalloc_array() in merge_attr()

On Sat, Sep 03, 2016 at 03:27:42PM +0200, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Sat, 3 Sep 2016 15:17:45 +0200
> 
> * A multiplication for the size determination of a memory allocation
>   indicated that an array data structure should be processed.
>   Thus reuse the corresponding function "kmalloc_array".
> 
> * Replace the specification of a data type by a pointer dereference
>   to make the corresponding size determination a bit safer according to
>   the Linux coding style convention.
> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  arch/s390/kernel/perf_cpum_cf_events.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/s390/kernel/perf_cpum_cf_events.c b/arch/s390/kernel/perf_cpum_cf_events.c
> index 4554a4b..0d6340b 100644
> --- a/arch/s390/kernel/perf_cpum_cf_events.c
> +++ b/arch/s390/kernel/perf_cpum_cf_events.c
> @@ -274,7 +274,7 @@ static __init struct attribute **merge_attr(struct attribute **a,
>  		j++;
>  	j++;
> 
> -	new = kmalloc(sizeof(struct attribute *) * j, GFP_KERNEL);
> +	new = kmalloc_array(j, sizeof(*new), GFP_KERNEL);
>  	if (!new)
>  		return NULL;
>  	j = 0;
> -- 

Looks good to me. Thanks.

Acked-by: Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>