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authorChristoph Hellwig <hch@lst.de>2019-03-25 17:44:06 +0300
committerChristoph Hellwig <hch@lst.de>2019-05-06 16:04:40 +0300
commit13bf5ced93775ffccb53527a9d862e023a9daa03 (patch)
tree8841a56889a7b6468e7c81215428376358345211 /drivers/parport
parent148a97d5a02a62f81b5d6176f871c94a65e1f3af (diff)
downloadlinux-13bf5ced93775ffccb53527a9d862e023a9daa03.tar.xz
dma-mapping: add a Kconfig symbol to indicate arch_dma_prep_coherent presence
Add a Kconfig symbol that indicates an architecture provides a arch_dma_prep_coherent implementation, and provide a stub otherwise. This will allow the generic dma-iommu code to use it while still allowing to be built for cache coherent architectures. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Robin Murphy <robin.murphy@arm.com>
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