linux-kernel - [PATCH -mm 5/6] parisc: set ARCH_KMALLOC

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Date:	Thu, 20 May 2010 12:21:42 +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>,
	Kyle McMartin <kyle@...artin.ca>, Helge Deller <deller@....de>,
	"James E.J. Bottomley" <jejb@...isc-linux.org>, stable@...nel.org
Subject: [PATCH -mm 5/6] parisc: 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: Kyle McMartin <kyle@...artin.ca>
Cc: Helge Deller <deller@....de>
Cc: James E.J. Bottomley <jejb@...isc-linux.org>
Cc: stable@...nel.org
---
 arch/parisc/include/asm/cache.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/parisc/include/asm/cache.h b/arch/parisc/include/asm/cache.h
index 45effe6..5d87f27 100644
--- a/arch/parisc/include/asm/cache.h
+++ b/arch/parisc/include/asm/cache.h
@@ -22,6 +22,8 @@
 #define L1_CACHE_SHIFT 5
 #endif
 
+#define ARCH_KMALLOC_MINALIGN	L1_CACHE_BYTES
+
 #ifndef __ASSEMBLY__
 
 #define L1_CACHE_ALIGN(x)       (((x)+(L1_CACHE_BYTES-1))&~(L1_CACHE_BYTES-1))
-- 
1.6.5

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