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asm-generic: remove ARCH_HAS_SG_CHAIN in scatterlist.h

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There are more architectures that don't support ARCH_HAS_SG_CHAIN than
those that support it.  This removes removes ARCH_HAS_SG_CHAIN in
asm-generic/scatterlist.h and lets arhictectures to define it.

It's clearer than defining ARCH_HAS_SG_CHAIN asm-generic/scatterlist.h and
undefing it in arhictectures that don't support it.

Signed-off-by: FUJITA Tomonori <[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 14:44:34 -07:00 • committed by Linus Torvalds
commit 1ef04370d8
8 changed files with 12 additions and 16 deletions
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4
arch/alpha/include/asm/scatterlist.h
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@ -1,10 +1,8 @@
#ifndef _ALPHA_SCATTERLIST_H
#define _ALPHA_SCATTERLIST_H
#define ISA_DMA_THRESHOLD (~0UL)
#include <asm-generic/scatterlist.h>
#undef ARCH_HAS_SG_CHAIN
#define ISA_DMA_THRESHOLD (~0UL)
#endif /* !(_ALPHA_SCATTERLIST_H) */