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frv: set ARCH_KMALLOC_MINALIGN

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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>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
FUJITA Tomonori 2010-05-24 14:32:54 -07:00 committed by Linus Torvalds
parent 7ca8b9c0da
commit 69dcf3db03
1 changed files with 2 additions and 0 deletions
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2
arch/frv/include/asm/cache.h
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@ -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)))