dma-mapping: add a dma_can_mmap helper

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Add a helper to check if DMA allocations for a specific device can be
mapped to userspace using dma_mmap_*.

Signed-off-by: Christoph Hellwig <hch@lst.de>

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Christoph Hellwig 2019-08-03 13:31:25 +03:00

parent f9f3232a7d

commit e29ccc188f

2 changed files with 28 additions and 0 deletions

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5

include/linux/dma-mapping.h

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23

kernel/dma/mapping.c

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