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| author | Christoph Hellwig <hch@lst.de> | 2019-08-26 10:03:44 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2019-08-29 17:43:22 +0300 |
| commit | 419e2f1838819e954071dfa1d1f820ab3386ada1 (patch) | |
| tree | 5ef040344115ef0a0bbf30461668f5d831fecf2e /arch/m68k/include | |
| parent | b898e50f9f49f7d90f3bca94ac046145072034a2 (diff) | |
| download | linux-419e2f1838819e954071dfa1d1f820ab3386ada1.tar.xz | |
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/m68k/include')
| -rw-r--r-- | arch/m68k/include/asm/pgtable_mm.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/pgtable_mm.h b/arch/m68k/include/asm/pgtable_mm.h index fe3ddd73a0cc..fde4534b974f 100644 --- a/arch/m68k/include/asm/pgtable_mm.h +++ b/arch/m68k/include/asm/pgtable_mm.h @@ -169,6 +169,9 @@ static inline void update_mmu_cache(struct vm_area_struct *vma, ? (__pgprot((pgprot_val(prot) & _CACHEMASK040) | _PAGE_NOCACHE_S)) \ : (prot))) +pgprot_t pgprot_dmacoherent(pgprot_t prot); +#define pgprot_dmacoherent(prot) pgprot_dmacoherent(prot) + #endif /* CONFIG_COLDFIRE */ #include <asm-generic/pgtable.h> #endif /* !__ASSEMBLY__ */ |