[patch 157/177] dma-mapping: parisc: set ARCH_DMA_MINALIGN

[akpm@linux-foundation.org]

From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>

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>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/parisc/include/asm/cache.h |    2 ++
 1 file changed, 2 insertions(+)

diff -puN arch/parisc/include/asm/cache.h~dma-mapping-parisc-set-arch_dma_minalign arch/parisc/include/asm/cache.h
--- a/arch/parisc/include/asm/cache.h~dma-mapping-parisc-set-arch_dma_minalign
+++ a/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 */
_