From: Philippe Bergheaud <felix@linux.vnet.ibm.com>
Date: Thu, 26 Sep 2013 06:30:09 +0000 (+0200)
Subject: powerpc: word-at-a-time optimization for 64-bit Little Endian
X-Git-Tag: omap-for-v3.13/fixes-for-merge-window-take2~19^2~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d0cebfa650a084f041131207d81f9b311babd5ef;p=pandora-kernel.git

powerpc: word-at-a-time optimization for 64-bit Little Endian

This is an optimization for the PowerPC in 64-bit
little-endian. Bit counting is used in find_zero(), instead
of the multiply and shift.

It is modelled after Alan Modra's PowerPC LE strlen patch
http://sourceware.org/ml/libc-alpha/2013-08/msg00097.html.

Signed-off-by: Philippe Bergheaud <felix@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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