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| author | Christoph Hellwig <hch@lst.de> | 2019-08-26 09:03:44 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2019-08-29 16:43:22 +0200 |
| commit | 419e2f1838819e954071dfa1d1f820ab3386ada1 (patch) | |
| tree | 5ef040344115ef0a0bbf30461668f5d831fecf2e /arch/arm/Kconfig | |
| parent | b898e50f9f49f7d90f3bca94ac046145072034a2 (diff) | |
| download | linux-419e2f1838819e954071dfa1d1f820ab3386ada1.tar.gz | |
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/Kconfig | 2 |
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 |