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Message-Id: <20100903094753S.fujita.tomonori@lab.ntt.co.jp>
Date: Fri, 3 Sep 2010 09:51:31 +0900
From: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To: akpm@...ux-foundation.org
Cc: davem@...emloft.net, linux-kernel@...r.kernel.org,
linux-arch@...r.kernel.org
Subject: [PATCH -mm 0/8] unify dma_addr_t typedef
(CONFIG_ARCH_DMA_ADDR_T_64BIT)
There are about twenty architectures have the own dma_addr_t typedef
because include/asm-generic/types.h can't be perfect (some of them can
use it though):
#ifndef dma_addr_t
#ifdef CONFIG_PHYS_ADDR_T_64BIT
typedef u64 dma_addr_t;
#else
typedef u32 dma_addr_t;
#endif /* CONFIG_PHYS_ADDR_T_64BIT */
#endif /* dma_addr_t */
Another problem is that there is a way to determine if dma_addr_t is
64-bit. We see hopeless tricks like the following:
#if (defined(__i386__) && defined(CONFIG_HIGHMEM64G)) || defined(__x86_64__) || defined (__ia64__) || defined(__alpha__) || defined(__mips64__) || (defined(__mips__) && defined(CONFIG_HIGHMEM) && defined(CONFIG_64BIT_PHYS_ADDR))
This clean up the mess with introducing CONFIG_ARCH_DMA_ADDR_T_64BIT
define (like CONFIG_ARCH_PHYS_ADDR_T_64BIT).
If architecture needs 64bit dma_addr_t, it must enable
CONFIG_ARCH_DMA_ADDR_T_64BIT.
The summary are:
- always 64bit
-- alpha
-- ia64
-- tile
- conditionally 64bit
-- x86
-- mips
-- powerpc
-- s390
- always 32bit
-- arm
-- avr32
-- cris
-- frv
-- h8300
-- m32r
-- m68k
-- mn10300
-- parisc
-- xtensa
-- sparc
-- blackfin
-- microblaze
-- score
-- sh
=
arch/alpha/Kconfig | 3 +++
arch/alpha/include/asm/types.h | 1 -
arch/arm/include/asm/types.h | 3 ---
arch/avr32/include/asm/types.h | 8 --------
arch/cris/include/asm/types.h | 3 ---
arch/frv/include/asm/types.h | 8 --------
arch/h8300/include/asm/types.h | 4 ----
arch/ia64/Kconfig | 3 +++
arch/ia64/include/asm/types.h | 3 ---
arch/m32r/include/asm/types.h | 3 ---
arch/m68k/include/asm/types.h | 3 ---
arch/mips/Kconfig | 3 +++
arch/mips/include/asm/types.h | 6 ------
arch/mn10300/include/asm/types.h | 7 -------
arch/parisc/include/asm/types.h | 3 ---
arch/powerpc/Kconfig | 3 +++
arch/powerpc/include/asm/types.h | 5 -----
arch/s390/Kconfig | 3 +++
arch/s390/include/asm/types.h | 6 ------
arch/sparc/include/asm/types.h | 4 ----
arch/tile/Kconfig | 3 +++
arch/x86/Kconfig | 3 +++
arch/x86/include/asm/types.h | 8 --------
arch/xtensa/include/asm/types.h | 4 ----
include/asm-generic/types.h | 27 ---------------------------
include/linux/types.h | 6 ++++++
26 files changed, 27 insertions(+), 106 deletions(-)
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