Re: [PATCH -mm 2/5] asm-generic: add NEED_SG_DMA_LENGTH to definesg_dma_len()

From: Andrew Morton
Date: Mon Apr 05 2010 - 19:36:29 EST

On Sun, 4 Apr 2010 23:25:50 +0900
FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx> wrote:

> 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.

i386 allnoconfig:

arch/x86/kernel/pci-nommu.c: In function 'nommu_map_sg':
arch/x86/kernel/pci-nommu.c:71: error: 'struct scatterlist' has no member named 'dma_length'

So I enabled NEED_SG_DMA_LENGTH on x86_32 as well. It compiles...

--- a/arch/x86/Kconfig~asm-generic-add-need_sg_dma_length-to-define-sg_dma_len-fix
+++ a/arch/x86/Kconfig
@@ -103,7 +103,7 @@ config NEED_DMA_MAP_STATE
def_bool (X86_64 || DMAR || DMA_API_DEBUG)

- def_bool X86_64
+ def_bool y

def_bool y
diff -puN include/asm-generic/scatterlist.h~asm-generic-add-need_sg_dma_length-to-define-sg_dma_len-fix include/asm-generic/scatterlist.h

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