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 <[email protected]>
Acked-by: David Howells <[email protected]>
Cc: Koichi Yasutake <[email protected]>
Acked-by: Pekka Enberg <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/arch/mn10300/include/asm/cache.h b/arch/mn10300/include/asm/cache.h
index e03cfa2e997e7299e1215a3a8c25a516d19d6751..6e2fe28dde4e7d68f260871c9377b96f30e8e644 100644 (file)
--- 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