From 419e2f1838819e954071dfa1d1f820ab3386ada1 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 26 Aug 2019 09:03:44 +0200 Subject: 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 Acked-by: Geert Uytterhoeven # m68k Acked-by: Paul Burton # mips --- arch/mips/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/mips/Kconfig') diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index d50fafd7bf3a..fc88f68ea1ee 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1119,7 +1119,7 @@ config DMA_PERDEV_COHERENT config DMA_NONCOHERENT bool - select ARCH_HAS_DMA_MMAP_PGPROT + select ARCH_HAS_DMA_WRITE_COMBINE select ARCH_HAS_SYNC_DMA_FOR_DEVICE select ARCH_HAS_UNCACHED_SEGMENT select NEED_DMA_MAP_STATE -- cgit v1.2.3