linux-kernel - Re: [PATCH v3 22/22] bitops: remove minix bitops from asm/bitops.h

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Date:	Wed, 24 Nov 2010 14:55:59 +0900
From:	Paul Mundt <lethal@...ux-sh.org>
To:	Akinobu Mita <akinobu.mita@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Roman Zippel <zippel@...ux-m68k.org>,
	Andreas Schwab <schwab@...ux-m68k.org>,
	linux-m68k@...ts.linux-m68k.org,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	linux390@...ibm.com, linux-s390@...r.kernel.org,
	Yoshinori Sato <ysato@...rs.sourceforge.jp>,
	Michal Simek <monstr@...str.eu>,
	microblaze-uclinux@...e.uq.edu.au,
	"David S. Miller" <davem@...emloft.net>,
	sparclinux@...r.kernel.org,
	Hirokazu Takata <takata@...ux-m32r.org>,
	linux-m32r@...linux-m32r.org, Ralf Baechle <ralf@...ux-mips.org>,
	linux-mips@...ux-mips.org, linux-sh@...r.kernel.org,
	Chris Zankel <chris@...kel.net>
Subject: Re: [PATCH v3 22/22] bitops: remove minix bitops from asm/bitops.h

On Tue, Nov 23, 2010 at 10:38:24PM +0900, Akinobu Mita wrote:
> minix bit operations are only used by minix filesystem and useless
> by other modules. Because byte order of inode and block bitmaps is
> defferent on each architecture like below:
> 
> m68k:
> 	big-endian 16bit indexed bitmaps
> 
> h8300, microblaze, s390, sparc, m68knommu:
> 	big-endian 32 or 64bit indexed bitmaps
> 
> m32r, mips, sh, xtensa:
> 	big-endian 32 or 64bit indexed bitmaps for big-endian mode
> 	little-endian bitmaps for little-endian mode
> 
> Others:
> 	little-endian bitmaps
> 
> In order to move minix bit operations from asm/bitops.h to
> architecture independent code in minix file system, this provides two
> config options.
> 
> CONFIG_MINIX_FS_BIG_ENDIAN_16BIT_INDEXED is only selected by m68k.
> CONFIG_MINIX_FS_NATIVE_ENDIAN is selected by the architectures which
> use native byte order bitmaps (h8300, microblaze, s390, sparc,
> m68knommu, m32r, mips, sh, xtensa).
> The architectures which always use little-endian bitmaps do not select
> these options.
> 
> Finally, we can remove minix bit operations from asm/bitops.h for
> all architectures.
> 
> Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
> Acked-by: Arnd Bergmann <arnd@...db.de>
> Acked-by: Greg Ungerer <gerg@...inux.org>
> Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
> Cc: Roman Zippel <zippel@...ux-m68k.org>
> Cc: Andreas Schwab <schwab@...ux-m68k.org>
> Cc: linux-m68k@...ts.linux-m68k.org
> Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
> Cc: Heiko Carstens <heiko.carstens@...ibm.com>
> Cc: linux390@...ibm.com
> Cc: linux-s390@...r.kernel.org
> Cc: Yoshinori Sato <ysato@...rs.sourceforge.jp>
> Cc: Michal Simek <monstr@...str.eu>
> Cc: microblaze-uclinux@...e.uq.edu.au
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: sparclinux@...r.kernel.org
> Cc: Hirokazu Takata <takata@...ux-m32r.org>
> Cc: linux-m32r@...linux-m32r.org
> Cc: Ralf Baechle <ralf@...ux-mips.org>
> Cc: linux-mips@...ux-mips.org
> Cc: Paul Mundt <lethal@...ux-sh.org>
> Cc: linux-sh@...r.kernel.org
> Cc: Chris Zankel <chris@...kel.net>

Acked-by: Paul Mundt <lethal@...ux-sh.org>
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