netdev - Re: [RFC PATCHv3] printk: add %pM format specifier for MAC addresses

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Message-Id: <1225181091.3796.69.camel@johannes.berg>
Date:	Tue, 28 Oct 2008 09:04:51 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	Joe Perches <joe@...ches.com>
Cc:	Harvey Harrison <harvey.harrison@...il.com>,
	David Miller <davem@...emloft.net>, anders@...uras.de,
	netdev@...r.kernel.org, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCHv3] printk: add %pM format specifier for MAC
	addresses

On Mon, 2008-10-27 at 16:48 -0700, Joe Perches wrote:
> On Mon, 2008-10-27 at 16:14 -0700, Harvey Harrison wrote:
> > I was thinking of using %pI6 to replace NIP6() and NIP6_FMT and using
> > %#pI6 for NIP6_SEQFMT.
> > 
> > On the IPv4 side, maybe use %pI4 for network endian NIPQUAD() and NIPQUAD_FMT
> > and then %#pI4 for host-endian HIQUAD(), as displaying the IPv4 address without
> > the periods isn't useful?
> 
> HIPQUAD is horrible and should disappear.
> Just use htonl first.

But you can't really say

printk("... %p4 ...", &htonl(host_ip4));

can you? I suppose the compiler would actually create a variable for
that?

johannes

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