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Subject[PATCH -mm 1/6] blackfin: 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: Mike Frysinger <vapier@gentoo.org>
Cc: stable@kernel.org
---
arch/blackfin/include/asm/cache.h | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/blackfin/include/asm/cache.h b/arch/blackfin/include/asm/cache.h
index 8542bc3..93f6c63 100644
--- 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
--
1.6.5


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