From 7896bfa451b209f73bc8ec14721dcc2c5329a0a9 Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Tue, 10 Aug 2010 18:03:23 -0700
Subject: [PATCH] dma-mapping: parisc: set ARCH_DMA_MINALIGN

Architectures that handle DMA-non-coherent memory need to set
ARCH_DMA_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@lab.ntt.co.jp>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Helge Deller <deller@gmx.de>
Cc: James E.J. Bottomley <jejb@parisc-linux.org>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 arch/parisc/include/asm/cache.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/parisc/include/asm/cache.h b/arch/parisc/include/asm/cache.h
index 45effe6978fa..039880e7d2c9 100644
--- a/arch/parisc/include/asm/cache.h
+++ b/arch/parisc/include/asm/cache.h
@@ -28,6 +28,8 @@
 
 #define SMP_CACHE_BYTES L1_CACHE_BYTES
 
+#define ARCH_DMA_MINALIGN	L1_CACHE_BYTES
+
 #define __read_mostly __attribute__((__section__(".data..read_mostly")))
 
 void parisc_cache_init(void);	/* initializes cache-flushing */