netdev - Re: [PATCH 2.6.20] ibm_emac: Use ARRAY

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Message-ID: <20070205202206.GD11055@martell.zuzino.mipt.ru>
Date:	Mon, 5 Feb 2007 23:22:06 +0300
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	"Ahmed S. Darwish" <darwish.07@...il.com>
Cc:	ebs@...home.net, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, linuxppc-embedded@...abs.org
Subject: Re: [PATCH 2.6.20] ibm_emac: Use ARRAY_SIZE macro when appropriate

On Mon, Feb 05, 2007 at 06:59:16PM +0200, Ahmed S. Darwish wrote:
> A patch to use ARRAY_SIZE macro already defined in kernel.h.

OK, but checks you're changing are strange. idx there is signed so

	BUG_ON(idx < 0 || idx > ARRAY_SIZE());

should be more appropriate.

> --- a/drivers/net/ibm_emac/ibm_emac_debug.c
> +++ b/drivers/net/ibm_emac/ibm_emac_debug.c
> @@ -132,7 +132,7 @@ void emac_dbg_register(int idx, struct ocp_enet_private *dev)
>  {
>  	unsigned long flags;
>  
> -	if (idx >= sizeof(__emacs) / sizeof(__emacs[0])) {
> +	if (idx >= ARRAY_SIZE(__emacs)) {

no __vi, no cookie. :)

>  		printk(KERN_WARNING
>  		       "invalid index %d when registering EMAC for debugging\n",
>  		       idx);
> @@ -148,7 +148,7 @@ void mal_dbg_register(int idx, struct ibm_ocp_mal *mal)
>  {
>  	unsigned long flags;
>  
> -	if (idx >= sizeof(__mals) / sizeof(__mals[0])) {
> +	if (idx >= ARRAY_SIZE(__mals)) {
>  		printk(KERN_WARNING
>  		       "invalid index %d when registering MAL for debugging\n",
>  		       idx);

-
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