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[POWERPC] Fix kmalloc alignment on non-coherent DMA platforms
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>
Mon, 19 Nov 2007 08:25:06 +0000 (19:25 +1100)
committerPaul Mackerras <paulus@samba.org>
Tue, 20 Nov 2007 00:37:43 +0000 (11:37 +1100)
commit52142e756e9bf6485d3d53596e8aff2e816a7253
tree63ce9329dad3cefae84fec67535500f1f23d52e3tree | snapshot (tar.gz zip)
parentf9b6c1de697f07dd0fb1c79bb3a6a8aa302f7476commit | diff
[POWERPC] Fix kmalloc alignment on non-coherent DMA platforms

On platforms doing non-coherent DMA (4xx, 8xx, ...), it's important
that the kmalloc minimum alignment is set to the cache line size, to
avoid sharing cache lines between different objects, so that DMA to
one of the objects doesn't corrupt the other.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
include/asm-powerpc/page_32.h diff | blob | blame | history