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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/mm/dma-mapping.c
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/mm/dma-mapping.c')
-rw-r--r--arch/arm/mm/dma-mapping.c6
1 files changed, 0 insertions, 6 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index d42557ee69c2..d27b12f61737 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -2402,12 +2402,6 @@ long arch_dma_coherent_to_pfn(struct device *dev, void *cpu_addr,
return dma_to_pfn(dev, dma_addr);
}
-pgprot_t arch_dma_mmap_pgprot(struct device *dev, pgprot_t prot,
- unsigned long attrs)
-{
- return __get_dma_pgprot(attrs, prot);
-}
-
void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
gfp_t gfp, unsigned long attrs)
{