dma-mapping: parisc: set ARCH_DMA_MINALIGN

7896bfa4 · FUJITA Tomonori <[email protected]> · 2010-08-10 18:03:23 -07:00

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 <[email protected]>
Cc: Kyle McMartin <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: James E.J. Bottomley <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Commit: 7896bfa451b209f73bc8ec14721dcc2c5329a0a9
Parents: 4565f017

Changes

1 files changed · +2 −0

File	Status	Add	Del	Content
arch/parisc/include/asm/cache.h	modified	+2	−0	View file

arch/parisc/include/asm/cache.h

View file

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 */