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From: Greg KH on 1 Jul 2010 14:50
2.6.32-stable review patch. If anyone has any objections, please let us know.

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

From: FUJITA Tomonori <fujita.tomonori(a)lab.ntt.co.jp>

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(a)lab.ntt.co.jp>
Cc: Chris Zankel <chris(a)zankel.net>
Acked-by: Pekka Enberg <penberg(a)cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de>

---
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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