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Subject[PATCH -mm 6/6] xtensa: set ARCH_KMALLOC_MINALIGN
Date
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>
Cc: stable@kernel.org
---
arch/xtensa/include/asm/cache.h | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/arch/xtensa/include/asm/cache.h b/arch/xtensa/include/asm/cache.h
index f04c989..ed8cd3c 100644
--- 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 */
--
1.6.5


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