From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Sun, 23 May 2010 17:38:14 +0000 (+0200)
Subject: m68k: set ARCH_KMALLOC_MINALIGN
X-Git-Tag: v2.6.34.1~104
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b87004da4e3afef8ec75fa8357cc32ef6d105403;p=thirdparty%2Fkernel%2Fstable.git

m68k: set ARCH_KMALLOC_MINALIGN

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@lab.ntt.co.jp>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/arch/m68k/include/asm/cache.h b/arch/m68k/include/asm/cache.h
index fed3fd30de7e4..ecafbe1718c3c 100644
--- 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