Blackfin: set ARCH_KMALLOC_MINALIGN
FUJITA Tomonori [Thu, 20 May 2010 03:21:38 +0000 (23:21 -0400)]
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

index 8542bc3..93f6c63 100644 (file)
@@ -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