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authorChristoph Hellwig <hch@lst.de>2019-08-26 09:03:44 +0200
committerChristoph Hellwig <hch@lst.de>2019-08-29 16:43:22 +0200
commit419e2f1838819e954071dfa1d1f820ab3386ada1 (patch)
tree5ef040344115ef0a0bbf30461668f5d831fecf2e /arch/arm/Kconfig
parentb898e50f9f49f7d90f3bca94ac046145072034a2 (diff)
downloadlinux-419e2f1838819e954071dfa1d1f820ab3386ada1.tar.bz2
dma-mapping: remove arch_dma_mmap_pgprot
arch_dma_mmap_pgprot is used for two things: 1) to override the "normal" uncached page attributes for mapping memory coherent to devices that can't snoop the CPU caches 2) to provide the special DMA_ATTR_WRITE_COMBINE semantics on older arm systems and some mips platforms Replace one with the pgprot_dmacoherent macro that is already provided by arm and much simpler to use, and lift the DMA_ATTR_WRITE_COMBINE handling to common code with an explicit arch opt-in. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> # m68k Acked-by: Paul Burton <paul.burton@mips.com> # mips
Diffstat (limited to 'arch/arm/Kconfig')
-rw-r--r--arch/arm/Kconfig2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 24360211534a..217083caeabd 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -8,7 +8,7 @@ config ARM
select ARCH_HAS_DEBUG_VIRTUAL if MMU
select ARCH_HAS_DEVMEM_IS_ALLOWED
select ARCH_HAS_DMA_COHERENT_TO_PFN if SWIOTLB
- select ARCH_HAS_DMA_MMAP_PGPROT if SWIOTLB
+ select ARCH_HAS_DMA_WRITE_COMBINE if !ARM_DMA_MEM_BUFFERABLE
select ARCH_HAS_ELF_RANDOMIZE
select ARCH_HAS_FORTIFY_SOURCE
select ARCH_HAS_KEEPINITRD