arch/powerpc: add option to skip DMA sync as a part of mapping

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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.

Link: http://lkml.kernel.org/r/20161110113534.76501.86492.stgit@ahduyck-blue-test.jf.intel.com
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Alexander Duyck 2016-12-14 15:05:09 -08:00 • committed by Linus Torvalds

parent f50a2bd298

commit 6f77480961

1 changed files with 8 additions and 1 deletions

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arch/powerpc/kernel/dma.c

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