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From: David Miller <davem@davemloft.net>
Subject: Re: [RFC PATCHv3] printk: add %pM format specifier for MAC
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Date: Mon, 27 Oct 2008 16:55:56 -0700 (PDT)
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From: Harvey Harrison <harvey.harrison@gmail.com>
Date: Mon, 27 Oct 2008 16:14:14 -0700

> Did you happen to have a preference with regard to the specifier for
> IPv6 addresses:
> 
> 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?
> 
> What do you think of that?

I'm ok with the '#' modifier but remind me again what's wrong with
using plain %p4 and %p6?