netdev - Re: [PATCH 3/5] netdev: bfin_mac: fix performance issue found by netperf

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Date:	Fri, 29 May 2009 02:05:54 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	vapier@...too.org
Cc:	netdev@...r.kernel.org, uclinux-dist-devel@...ckfin.uclinux.org,
	michael.hennerich@...log.com, cooloney@...nel.org
Subject: Re: [PATCH 3/5] netdev: bfin_mac: fix performance issue found by
 netperf

From: Mike Frysinger <vapier@...too.org>
Date: Wed, 27 May 2009 02:10:13 -0400

> @@ -606,86 +606,28 @@ static int bfin_mac_hard_start_xmit(struct sk_buff *skb,
>  				struct net_device *dev)
>  {
>  	u16 *data;
> -
> +	u32 data_align = (u32)(skb->data) & 0x3;

A pointer is not castable directly to a u32 everywhere.  It can be
64-bits and in which case GCC will warn here.

I know this is a blackfin specific driver, but please write portable
code.

Use "unsigned long" or similar.

I'm not applying this as it is now.
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