[patch 076/164] xtensa: set ARCH_KMALLOC_MINALIGN

[Greg KH]

2.6.33-stable review patch.  If anyone has any objections, please let me know.

------------------

From: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>

commit 498900fc9cd1adbad1ba6b55ed9d8f2f5d655ca3 upstream.

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@xxxxxxxxxxxxx>
Cc: Chris Zankel <chris@xxxxxxxxxx>
Acked-by: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 arch/xtensa/include/asm/cache.h |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/xtensa/include/asm/cache.h
+++ b/arch/xtensa/include/asm/cache.h
@@ -29,5 +29,6 @@
 # define CACHE_WAY_SIZE ICACHE_WAY_SIZE
 #endif
 
+#define ARCH_KMALLOC_MINALIGN	L1_CACHE_BYTES
 
 #endif	/* _XTENSA_CACHE_H */


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