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authorChristoph Hellwig <hch@lst.de>2019-03-25 15:44:06 +0100
committerChristoph Hellwig <hch@lst.de>2019-05-06 15:04:40 +0200
commit13bf5ced93775ffccb53527a9d862e023a9daa03 (patch)
tree8841a56889a7b6468e7c81215428376358345211 /kernel
parent148a97d5a02a62f81b5d6176f871c94a65e1f3af (diff)
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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>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/dma/Kconfig3
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig
index 52b704e2b97a..83d711f8d665 100644
--- a/kernel/dma/Kconfig
+++ b/kernel/dma/Kconfig
@@ -38,6 +38,9 @@ config ARCH_HAS_SYNC_DMA_FOR_CPU
config ARCH_HAS_SYNC_DMA_FOR_CPU_ALL
bool
+config ARCH_HAS_DMA_PREP_COHERENT
+ bool
+
config ARCH_HAS_DMA_COHERENT_TO_PFN
bool