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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2010-05-24 14:32:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-25 08:07:02 -0700
commit6cdafaae41d52e6ef9a5c5be23602ef083e4d0f9 (patch)
tree49091924b0f72f2c91d31eed62b3344ad6bbeecb /arch/mn10300
parent366831615911c51596b2a9e1024a110a1d0939a1 (diff)
downloadlinux-6cdafaae41d52e6ef9a5c5be23602ef083e4d0f9.tar.bz2
mn10300: set ARCH_KMALLOC_MINALIGN
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: David Howells <dhowells@redhat.com> Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/mn10300')
-rw-r--r--arch/mn10300/include/asm/cache.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/mn10300/include/asm/cache.h b/arch/mn10300/include/asm/cache.h
index e03cfa2e997e..6e2fe28dde4e 100644
--- a/arch/mn10300/include/asm/cache.h
+++ b/arch/mn10300/include/asm/cache.h
@@ -21,6 +21,8 @@
#define L1_CACHE_DISPARITY L1_CACHE_NENTRIES * L1_CACHE_BYTES
#endif
+#define ARCH_KMALLOC_MINALIGN L1_CACHE_BYTES
+
/* data cache purge registers
* - read from the register to unconditionally purge that cache line
* - write address & 0xffffff00 to conditionally purge that cache line