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asm-generic: add NEED_SG_DMA_LENGTH to define sg_dma_len()

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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 <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Richard Henderson <[email protected]>
Cc: Ivan Kokshaysky <[email protected]>
Cc: Matt Turner <[email protected]>
Cc: Russell King <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
FUJITA Tomonori 2010-05-26 14:44:32 -07:00 • committed by Linus Torvalds
commit 18e98307de
6 changed files with 17 additions and 10 deletions
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3
arch/sh/Kconfig
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@ -186,6 +186,9 @@ config DMA_NONCOHERENT
config NEED_DMA_MAP_STATE
def_bool DMA_NONCOHERENT
config NEED_SG_DMA_LENGTH
def_bool y
source "init/Kconfig"
source "kernel/Kconfig.freezer"