linux-kernel - [patch 077/164] Blackfin: set ARCH_KMALLOC

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Message-Id: <20100701173433.295618195@clark.site>
Date:	Thu, 01 Jul 2010 10:34:23 -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>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Mike Frysinger <vapier@...too.org>
Subject: [patch 077/164] Blackfin: 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 76b99699a2bbf9efdb578f9a38a202af2ecb354b 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: Pekka Enberg <penberg@...helsinki.fi>
Signed-off-by: Mike Frysinger <vapier@...too.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

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

--- a/arch/blackfin/include/asm/cache.h
+++ b/arch/blackfin/include/asm/cache.h
@@ -15,6 +15,8 @@
 #define L1_CACHE_BYTES	(1 << L1_CACHE_SHIFT)
 #define SMP_CACHE_BYTES	L1_CACHE_BYTES
 
+#define ARCH_KMALLOC_MINALIGN	L1_CACHE_BYTES
+
 #ifdef CONFIG_SMP
 #define __cacheline_aligned
 #else


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