[patch 075/164] frv: set ARCH_KMALLOC_MINALIGN

Greg KH
2010-07-01T22:08:08Z

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 69dcf3db03626c4f18de624e8632454ea12ff260 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: David Howells <dhowells@redhat.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

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

--- a/arch/frv/include/asm/cache.h
+++ b/arch/frv/include/asm/cache.h
@@ -17,6 +17,8 @@
#define L1_CACHE_SHIFT (CONFIG_FRV_L1_CACHE_SHIFT)
#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)

+#define ARCH_KMALLOC_MINALIGN L1_CACHE_BYTES
+
#define __cacheline_aligned __attribute__((aligned(L1_CACHE_BYTES)))
#define ____cacheline_aligned __attribute__((aligned(L1_CACHE_BYTES)))