Messages in this thread Patch in this message | | | From | FUJITA Tomonori <> | Subject | [PATCH -mm 3/3] parisc: set ARCH_DMA_MINALIGN | Date | Thu, 8 Jul 2010 15:57:48 +0900 |
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Architectures that handle DMA-non-coherent memory need to set ARCH_DMA_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: Kyle McMartin <kyle@mcmartin.ca> Cc: Helge Deller <deller@gmx.de> Cc: James E.J. Bottomley <jejb@parisc-linux.org> --- arch/parisc/include/asm/cache.h | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/parisc/include/asm/cache.h b/arch/parisc/include/asm/cache.h index 45effe6..039880e 100644 --- a/arch/parisc/include/asm/cache.h +++ b/arch/parisc/include/asm/cache.h @@ -28,6 +28,8 @@ #define SMP_CACHE_BYTES L1_CACHE_BYTES +#define ARCH_DMA_MINALIGN L1_CACHE_BYTES + #define __read_mostly __attribute__((__section__(".data..read_mostly"))) void parisc_cache_init(void); /* initializes cache-flushing */ -- 1.6.5
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