linux-kernel - Re: [PATCH 1/1] net/wireless/ibss.c: replace memcpy by ether_addr

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Date:	Mon, 12 May 2014 11:07:09 -0700
From:	Joe Perches <joe@...ches.com>
To:	Fabian Frederick <fabf@...net.be>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Johannes Berg <johannes@...solutions.net>,
	"John W. Linville" <linville@...driver.com>,
	akpm <akpm@...ux-foundation.org>
Subject: Re: [PATCH 1/1] net/wireless/ibss.c: replace memcpy by
 ether_addr_copy

On Mon, 2014-05-12 at 20:00 +0200, Fabian Frederick wrote:
> On Mon, 12 May 2014 10:50:25 -0700
> Joe Perches <joe@...ches.com> wrote:
> 
> > On Mon, 2014-05-12 at 19:30 +0200, Fabian Frederick wrote:
> > > This patch also fixes some comment checkpatch warnings
> > 
> > Hello Fabian.
> > 
> > For all the patches that replace memcpy(foo, bar, ETH_ALEN)
> > with ether_addr_copy, did you use a tool to verify both
> > arguments are __aligned(2) or did you do the verification
> > visually?
> 
> Hello Joe,
> 
> I only replaced ETH_ALEN/memcpy .
> AFAICS ETH_ALEN is defined 6 ...

The difference here is that both arguments to
ether_addr_copy, like all the is_<foo>_ether_addr
helpers, must be __aligned(2).  memcpy has
no alignment requirement.

Please verify that all these changes are to
__aligned(2) arguments.


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