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dma-mapping: add (back) arch_dma_mark_clean for ia64

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Add back a hook to optimize dcache flushing after reading executable
code using DMA.  This gets ia64 out of the business of pretending to
be dma incoherent just for this optimization.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig
2020-08-17 16:41:50 +02:00
parent ef1a85b6ca
commit abdaf11ac1
7 changed files with 23 additions and 17 deletions
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6
kernel/dma/Kconfig
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@@ -44,6 +44,12 @@ config ARCH_HAS_DMA_SET_MASK
config ARCH_HAS_DMA_WRITE_COMBINE
bool
#
# Select if the architectures provides the arch_dma_mark_clean hook
#
config ARCH_HAS_DMA_MARK_CLEAN
bool
config DMA_DECLARE_COHERENT
bool