dma-direct: make uncached_kernel_address more general
Rename the symbol to arch_dma_set_uncached, and pass a size to it as
well as allow an error return. That will allow reusing this hook for
in-place pagetable remapping.
As the in-place remap doesn't always require an explicit cache flush,
also detangle ARCH_HAS_DMA_PREP_COHERENT from ARCH_HAS_DMA_SET_UNCACHED.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 797d7f1..489185d 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1187,8 +1187,9 @@
# significant advantages.
#
select ARCH_HAS_DMA_WRITE_COMBINE
+ select ARCH_HAS_DMA_PREP_COHERENT
select ARCH_HAS_SYNC_DMA_FOR_DEVICE
- select ARCH_HAS_UNCACHED_SEGMENT
+ select ARCH_HAS_DMA_SET_UNCACHED
select DMA_NONCOHERENT_MMAP
select DMA_NONCOHERENT_CACHE_SYNC
select NEED_DMA_MAP_STATE
