On Fri, Aug 16, 2019 at 9:19 AM Christoph Hellwig <[email protected]> wrote: > 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 > > 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 <[email protected]>
> arch/m68k/Kconfig | 1 - > arch/m68k/include/asm/pgtable_mm.h | 3 +++ > arch/m68k/kernel/dma.c | 3 +-- Acked-by: Geert Uytterhoeven <[email protected]> Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected] In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
