diff options
| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2010-05-26 14:44:32 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-27 09:12:54 -0700 |
| commit | 18e98307de0d746cb0845ebf66535ce2184c25a2 (patch) | |
| tree | eac998f31e3930ffc1f54e524a2a9bbc82b851e0 /include/asm-generic/scatterlist.h | |
| parent | 204f3a04449a9a775e465f7d87bcab08f170e59e (diff) | |
| download | linux-18e98307de0d746cb0845ebf66535ce2184c25a2.tar.bz2 | |
asm-generic: add NEED_SG_DMA_LENGTH to define sg_dma_len()
There are only two ways to define sg_dma_len(); use sg->dma_length or
sg->length. This patch introduces NEED_SG_DMA_LENGTH that enables
architectures to choose sg->dma_length or sg->length.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-generic/scatterlist.h')
| -rw-r--r-- | include/asm-generic/scatterlist.h | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/include/asm-generic/scatterlist.h b/include/asm-generic/scatterlist.h index 51a7a43ab0ce..5e087944a659 100644 --- a/include/asm-generic/scatterlist.h +++ b/include/asm-generic/scatterlist.h @@ -11,7 +11,9 @@ struct scatterlist { unsigned int offset; unsigned int length; dma_addr_t dma_address; +#ifdef CONFIG_NEED_SG_DMA_LENGTH unsigned int dma_length; +#endif }; /* @@ -22,17 +24,12 @@ struct scatterlist { * is 0. */ #define sg_dma_address(sg) ((sg)->dma_address) -#ifndef sg_dma_len -/* - * Normally, you have an iommu on 64 bit machines, but not on 32 bit - * machines. Architectures that are differnt should override this. - */ -#if __BITS_PER_LONG == 64 + +#ifdef CONFIG_NEED_SG_DMA_LENGTH #define sg_dma_len(sg) ((sg)->dma_length) #else #define sg_dma_len(sg) ((sg)->length) -#endif /* 64 bit */ -#endif /* sg_dma_len */ +#endif #define ARCH_HAS_SG_CHAIN |