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mn10300: set ARCH_KMALLOC_MINALIGN

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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 <[email protected]>
Acked-by: David Howells <[email protected]>
Cc: Koichi Yasutake <[email protected]>
Acked-by: Pekka Enberg <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
FUJITA Tomonori 2010-05-24 14:32:58 -07:00 • committed by Linus Torvalds
commit 6cdafaae41
1 changed files with 2 additions and 0 deletions
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2
arch/mn10300/include/asm/cache.h
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@ -21,6 +21,8 @@
#define L1_CACHE_DISPARITY L1_CACHE_NENTRIES * L1_CACHE_BYTES
#endif
#define ARCH_KMALLOC_MINALIGN L1_CACHE_BYTES
/* data cache purge registers
* - read from the register to unconditionally purge that cache line
* - write address & 0xffffff00 to conditionally purge that cache line