netdev - Re: [PATCH] net: pfifo_fast - use ffs(x)-1 instead of array lookup

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Message-ID: <CAHo-OoyWH9v+D7yJp3sAKnmUEp_DiTeDhmgPme2dGoqWGa2qjg@mail.gmail.com>
Date:	Tue, 13 Mar 2012 00:23:27 -0700
From:	Maciej Żenczykowski <zenczykowski@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH] net: pfifo_fast - use ffs(x)-1 instead of array lookup

I was actually leaning towards going with ffs()-1, since

it's excellent on x86-64
good on x86_cmov
decent on x86
good on armv5+

and I'm guessing it'll be good or better on any modern platform
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