linux-kernel - Re: [PATCH v4 09/24] bitops: introduce little-endian bitops for most architectures

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Message-ID: <4D33608F.6060908@zytor.com>
Date:	Sun, 16 Jan 2011 13:18:07 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Akinobu Mita <akinobu.mita@...il.com>
CC:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	akpm@...ux-foundation.org, Richard Henderson <rth@...ddle.net>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Hans-Christian Egtvedt <hans-christian.egtvedt@...el.com>,
	Bryan Wu <bryan.wu@...log.com>,
	Mikael Starvik <starvik@...s.com>,
	David Howells <dhowells@...hat.com>,
	Yoshinori Sato <ysato@...rs.sourceforge.jp>,
	"Luck, Tony" <tony.luck@...el.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Kyle McMartin <kyle@...artin.ca>,
	Matthew Wilcox <willy@...ian.org>,
	Grant Grundler <grundler@...isc-linux.org>,
	Paul Mundt <lethal@...ux-sh.org>,
	Kazumoto Kojima <kkojima@...iij4u.or.jp>,
	"David S. Miller" <davem@...emloft.net>,
	Chris Zankel <chris@...kel.net>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v4 09/24] bitops: introduce little-endian bitops for most
 architectures

On 01/16/2011 05:08 AM, Akinobu Mita wrote:
> Introduce little-endian bit operations to the architectures which do not
> have native little-endian bit operations.  (alpha, avr32, blackfin, cris,
> frv, h8300, ia64, m32r, mips, mn10300, parisc, sh, sparc, tile, x86,
> xtensa)
> 
> These architectures can just include generic implementation
> (asm-generic/bitops/le.h).
> 

ACK on the patch, but the description is confusing for actual
littleendian architectures -- the native bit operations on x86, for
example, are in fact littleendian (and as such <asm-generic/bitops/le.h>
just wraps the existing native bitops.)

	-hpa
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