linux-kernel - [PATCH -mm 4/6] mn10300: set ARCH_KMALLOC

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Message-Id: <1274325703-11092-5-git-send-email-fujita.tomonori@lab.ntt.co.jp>
Date:	Thu, 20 May 2010 12:21:41 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Cc:	davem@...emloft.net, dwmw2@...radead.org,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	David Howells <dhowells@...hat.com>,
	Koichi Yasutake <yasutake.koichi@...panasonic.com>,
	stable@...nel.org
Subject: [PATCH -mm 4/6] mn10300: set ARCH_KMALLOC_MINALIGN

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: David Howells <dhowells@...hat.com>
Cc: Koichi Yasutake <yasutake.koichi@...panasonic.com>
Cc: stable@...nel.org
---
 arch/mn10300/include/asm/cache.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/mn10300/include/asm/cache.h b/arch/mn10300/include/asm/cache.h
index e03cfa2..6e2fe28 100644
--- 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
-- 
1.6.5

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