From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joe Perches <joe@perches.com>
Subject: Re: sysfs_format_mac
Date: Tue, 16 Jul 2013 13:46:26 -0700
Message-ID: <1374007586.1949.25.camel@joe-AO722>
References: <20130716.125641.1190207010366517153.davem@davemloft.net>
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Cc: netdev@vger.kernel.org
To: David Miller <davem@davemloft.net>
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On Tue, 2013-07-16 at 12:56 -0700, David Miller wrote:
> 
> I assume that the only reason sysfs_format_mac() exists at all, and
> don't just use scnprintf() calls with "%pm\n", is that some devices
> have MAC addresses which are not 6 bytes in length.
> 
> But it's such a waste to have this special case piece of code
> just for that.
> 
> It would make so much more sense to allow specifying a length
> specifier to %pm and friends.

scnprintf("%*ph", (int)size, buffer)