netdev - Re: [PATCH net-next v2 0/6] slight optimization of addr compare for some modules

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Date:	Mon, 16 Dec 2013 06:45:11 -0800
From:	Joe Perches <joe@...ches.com>
To:	Ding Tianhong <dingtianhong@...wei.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next v2 0/6] slight optimization of addr compare for
 some modules

On Mon, 2013-12-16 at 16:24 +0800, Ding Tianhong wrote:
> Joe Perches add ether_addr_equal_unaligned to test if
> possibly unaligned to u16 Ethernet addresses are equal.
> 
> If CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is set, this uses
> the slightly faster generic routine ether_addr_equal,
> otherwise this uses memcmp.
> 
> So I replace memcmp with ether_addr_equal_unaligned in some place
> for slight optimization.

Hi.

These seem like sensible cleanups, thanks, but
my name doesn't need to go into the commit log
multiple times like this.

I suggest something like:

Use the recently added and possibly more efficient
ether_addr_equal_unaligned.

Are you intending to do more of these?

$ git grep -E "\bmemcmp\s*\([^,]*,[^,]*,\s*(ETH_ALEN|6)\s*\)" * | wc -l
299

Perhaps the majority of these should use ether_addr_equal
or ether_addr_equal_unaligned.


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