Re: [mm PATCH v2 18/26] arch/powerpc: Add option to skip DMA sync as a part of mapping

[Michael Ellerman]

Alexander Duyck <alexander.h.duyck@xxxxxxxxx> writes:

> This change allows us to pass DMA_ATTR_SKIP_CPU_SYNC which allows us to
> avoid invoking cache line invalidation if the driver will just handle it
> via a sync_for_cpu or sync_for_device call.
>
> Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
> Cc: Paul Mackerras <paulus@xxxxxxxxx>
> Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
> Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
> Signed-off-by: Alexander Duyck <alexander.h.duyck@xxxxxxxxx>
> ---
>  arch/powerpc/kernel/dma.c |    9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)

LGTM.

Acked-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> (powerpc)

cheers