Commit 6cdafaae authored May 24, 2010 by FUJITA Tomonori Committed by Linus Torvalds May 25, 2010

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>

parent 36683161

arch/mn10300/include/asm/cache.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -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