linux-kernel - [095/200] mn10300: set ARCH_KMALLOC

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Date:	Thu, 01 Jul 2010 10:43:05 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	David Howells <dhowells@...hat.com>,
	Koichi Yasutake <yasutake.koichi@...panasonic.com>,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: [095/200] mn10300: set ARCH_KMALLOC_MINALIGN

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

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

From: FUJITA Tomonori <fujita.tomonori@....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@....ntt.co.jp>
Acked-by: David Howells <dhowells@...hat.com>
Cc: Koichi Yasutake <yasutake.koichi@...panasonic.com>
Acked-by: Pekka Enberg <penberg@...helsinki.fi>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.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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