netdev - Re: [PATCH net-next 13/14] wireless: Use eth_<foo>

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Date:	Tue, 03 Mar 2015 02:29:33 -0800
From:	Joe Perches <joe@...ches.com>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 13/14] wireless: Use eth_<foo>_addr instead of
 memset

On Tue, 2015-03-03 at 10:00 +0100, Johannes Berg wrote:
> On Tue, 2015-03-03 at 00:52 -0800, Joe Perches wrote:
> 
> > > > My guess is the eth_zero_addr and eth_broadcast functions
> > > > are always taking aligned(2) arguments, just like all the
> > > > is_<foo>_ether_addr functions.
> > > 
> > > Err, are you serious???
> > 
> > Yes.
> > 
> > > That *clearly* isn't true, and if it was then
> > > this patch wouldn't be safe at all.
> > 
> > And why is that?
> > 
> > Until patch 1 of this series, eth_zero_addr and
> > eth_broadcast_addr was just an inline for a memset.
> > 
> > Even after patch 1, it's effectively still memset.
> 
> Exactly. It therefore *doesn't* require an aligned(2) argument, unlike
> what you stated above, hence my question if you're serious (and perhaps
> looking at some other code that I don't have).

Nope, you simply misunderstood what I did write.

What I said was that the arguments were likely
already aligned(2), not that the alignment was
a requirement.


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