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xtensa: set ARCH_KMALLOC_MINALIGN 

Architectures that handle DMA-non-coherent memory need to set
ARCH_KMALLOC_MINALIGN to make sure that kmalloc'ed buffer is DMA-safe: the
buffer doesn't share a cache with the others.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Chris Zankel <chris@zankel.net>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
FUJITA Tomonori 2010-05-24 14:31:45 -07:00 committed by Linus Torvalds
parent 7e125f7b9c
commit 498900fc9c
1 changed files with 1 additions and 0 deletions
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arch/xtensa/include/asm/cache.h
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@ -29,5 +29,6 @@
# define CACHE_WAY_SIZE ICACHE_WAY_SIZE
#endif
#define ARCH_KMALLOC_MINALIGN L1_CACHE_BYTES
#endif /* _XTENSA_CACHE_H */