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From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH] pktgen: use %pI6c for printing IPv6 addresses
Date: Sun, 08 May 2011 15:50:56 -0700 (PDT)
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From: Joe Perches <joe@perches.com>
Date: Tue, 03 May 2011 15:11:54 -0700

> On Wed, 2011-05-04 at 00:23 +0300, Alexey Dobriyan wrote:
>> I don't know why %pI6 doesn't compress, but the format specifier is
>> kernel-standard, so use it.
> 
> Because seq_printf output using %pI6 has a known
> output style and shouldn't be changed to avoid
> breaking user applications.

I've applied Alexey's patch to net-next-2.6