[patch 077/164] Blackfin: set ARCH_KMALLOC_MINALIGN

Greg KH
2010-07-01T22:07:19Z

2.6.33-stable review patch. If anyone has any objections, please let me know.

------------------

From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>

commit 76b99699a2bbf9efdb578f9a38a202af2ecb354b 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>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
arch/blackfin/include/asm/cache.h | 2 ++
1 file changed, 2 insertions(+)

--- 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