dma-direct: provide page based alloc/free helpers

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Some architectures support remapping highmem into DMA coherent
allocations.  To use the common code for them we need variants of
dma_direct_{alloc,free}_pages that do not use kernel virtual addresses.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>

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Christoph Hellwig 2018-11-04 17:27:56 +01:00

parent c9d76d0655

commit b18814e767

2 changed files with 25 additions and 10 deletions

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3

include/linux/dma-direct.h

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32

kernel/dma/direct.c

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