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From: FUJITA Tomonori on 19 May 2010 23:30
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(a)lab.ntt.co.jp>
Cc: Kyle McMartin <kyle(a)mcmartin.ca>
Cc: Helge Deller <deller(a)gmx.de>
Cc: James E.J. Bottomley <jejb(a)parisc-linux.org>
Cc: stable(a)kernel.org
---
arch/parisc/include/asm/cache.h | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/parisc/include/asm/cache.h b/arch/parisc/include/asm/cache.h
index 45effe6..5d87f27 100644
--- a/arch/parisc/include/asm/cache.h
+++ b/arch/parisc/include/asm/cache.h
@@ -22,6 +22,8 @@
#define L1_CACHE_SHIFT 5
#endif

+#define ARCH_KMALLOC_MINALIGN L1_CACHE_BYTES
+
#ifndef __ASSEMBLY__

#define L1_CACHE_ALIGN(x) (((x)+(L1_CACHE_BYTES-1))&~(L1_CACHE_BYTES-1))
--
1.6.5

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