linux-kernel - Re: [PATCH] kernel: time: use ARRAY

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Date:	Sun, 22 Aug 2010 18:01:44 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Nikitas Angelinas <nikitasangelinas@...glemail.com>
Cc:	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"21cnbao@...il.com" <21cnbao@...il.com>,
	"tj@...nel.org" <tj@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Nikitas Angelinas <nikitasangelinas@...glemail.com>
Subject: Re: [PATCH] kernel: time: use ARRAY_SIZE macro in timecompare.c

On Aug 22, 2010, at 4:43 PM, Nikitas Angelinas <nikitasangelinas@...glemail.com 
 > wrote:

> Replace sizeof(buffer)/sizeof(buffer[0]) with ARRAY_SIZE(buffer) in
> kernel/time/timecompare.c
>
> Signed-off-by: Nikitas Angelinas <nikitasangelinas@...glemail.com>
> ---
> kernel/time/timecompare.c |    5 +++--
> 1 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/kernel/time/timecompare.c b/kernel/time/timecompare.c
> index ac38fbb..a9ae369 100644
> --- a/kernel/time/timecompare.c
> +++ b/kernel/time/timecompare.c
> @@ -21,6 +21,7 @@
> #include <linux/module.h>
> #include <linux/slab.h>
> #include <linux/math64.h>
> +#include <linux/kernel.h>
>
> /*
>  * fixed point arithmetic scale factor for skew
> @@ -57,11 +58,11 @@ int timecompare_offset(struct timecompare *sync,
>    int index;
>    int num_samples = sync->num_samples;
>
> -    if (num_samples > sizeof(buffer)/sizeof(buffer[0])) {
> +    if (num_samples > ARRAY_SIZE(buffer)) {
>        samples = kmalloc(sizeof(*samples) * num_samples, GFP_ATOMIC);

That should be kcalloc while you are at it.

Thanks.

-- 
Dmitry

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