| Date | Thu, 01 Jul 2010 10:31:33 -0700 | From | Greg KH <> | Subject | [patch 067/149] xtensa: set ARCH_KMALLOC_MINALIGN |
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2.6.32-stable review patch. If anyone has any objections, please let us know.
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From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
commit 498900fc9cd1adbad1ba6b55ed9d8f2f5d655ca3 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> Cc: Chris Zankel <chris@zankel.net> 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/xtensa/include/asm/cache.h | 1 + 1 file changed, 1 insertion(+)
--- a/arch/xtensa/include/asm/cache.h +++ b/arch/xtensa/include/asm/cache.h @@ -29,5 +29,6 @@ # define CACHE_WAY_SIZE ICACHE_WAY_SIZE #endif +#define ARCH_KMALLOC_MINALIGN L1_CACHE_BYTES #endif /* _XTENSA_CACHE_H */
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