m68k: set ARCH_KMALLOC_MINALIGN
authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Sun, 23 May 2010 17:38:14 +0000 (19:38 +0200)
committerGeert Uytterhoeven <geert@linux-m68k.org>
Wed, 26 May 2010 17:51:06 +0000 (19:51 +0200)
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>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
arch/m68k/include/asm/cache.h

index fed3fd30de7e468797a85ff5945119c436f92fce..ecafbe1718c3cccee4a0441efaca9670b0548c59 100644 (file)
@@ -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