| Date | Thu, 01 Jul 2010 10:34:23 -0700 | From | Greg KH <> | Subject | [patch 077/164] Blackfin: set ARCH_KMALLOC_MINALIGN |
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2.6.33-stable review patch. If anyone has any objections, please let me know.
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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
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