git » linux-kernel » commit 76b9969

Blackfin: set ARCH_KMALLOC_MINALIGN

author FUJITA Tomonori
2010-05-20 03:21:38 UTC
committer Mike Frysinger
2010-05-22 18:19:13 UTC
parent eb5400b6131e6ebaacf809357643a22a72d5cc4c
Blackfin: 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@lab.ntt.co.jp>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
arch/blackfin/include/asm/cache.h +2 -0 
diff --git a/arch/blackfin/include/asm/cache.h b/arch/blackfin/include/asm/cache.h
index 8542bc31f63..93f6c634fdf 100644
--- a/arch/blackfin/include/asm/cache.h
+++ b/arch/blackfin/include/asm/cache.h
@@ -15,6 +15,8 @@
 #define L1_CACHE_BYTES	(1 << L1_CACHE_SHIFT)
 #define SMP_CACHE_BYTES	L1_CACHE_BYTES
 
+#define ARCH_KMALLOC_MINALIGN	L1_CACHE_BYTES
+
 #ifdef CONFIG_SMP
 #define __cacheline_aligned
 #else