linux-kernel - [patch 072/164] m68k: set ARCH_KMALLOC

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Message-Id: <20100701173432.881541976@clark.site>
Date:	Thu, 01 Jul 2010 10:34:18 -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>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Roman Zippel <zippel@...ux-m68k.org>,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: [patch 072/164] m68k: set ARCH_KMALLOC_MINALIGN

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

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

From: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>

commit dd6c26a66bdc629a500174ffe73b010b070b9f1b 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>
Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: Roman Zippel <zippel@...ux-m68k.org>
Acked-by: Pekka Enberg <penberg@...helsinki.fi>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 arch/m68k/include/asm/cache.h |    2 ++
 1 file changed, 2 insertions(+)

--- a/arch/m68k/include/asm/cache.h
+++ b/arch/m68k/include/asm/cache.h
@@ -8,4 +8,6 @@
 #define        L1_CACHE_SHIFT  4
 #define        L1_CACHE_BYTES  (1<< L1_CACHE_SHIFT)
 
+#define ARCH_KMALLOC_MINALIGN	L1_CACHE_BYTES
+
 #endif


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