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From: Greg KH on 1 Jul 2010 18:10
2.6.33-stable review patch. If anyone has any objections, please let me know.

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

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

commit 6cdafaae41d52e6ef9a5c5be23602ef083e4d0f9 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>
Acked-by: David Howells <dhowells(a)redhat.com>
Cc: Koichi Yasutake <yasutake.koichi(a)jp.panasonic.com>
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/mn10300/include/asm/cache.h | 2 ++
1 file changed, 2 insertions(+)

--- a/arch/mn10300/include/asm/cache.h
+++ b/arch/mn10300/include/asm/cache.h
@@ -21,6 +21,8 @@
#define L1_CACHE_DISPARITY L1_CACHE_NENTRIES * L1_CACHE_BYTES
#endif

+#define ARCH_KMALLOC_MINALIGN L1_CACHE_BYTES
+
/* data cache purge registers
* - read from the register to unconditionally purge that cache line
* - write address & 0xffffff00 to conditionally purge that cache line


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