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Diffstat (limited to 'include/linux/dma-noncoherent.h')
-rw-r--r--include/linux/dma-noncoherent.h13
1 files changed, 9 insertions, 4 deletions
diff --git a/include/linux/dma-noncoherent.h b/include/linux/dma-noncoherent.h
index 3813211a9aad..0bff3d7fac92 100644
--- a/include/linux/dma-noncoherent.h
+++ b/include/linux/dma-noncoherent.h
@@ -42,13 +42,18 @@ void arch_dma_free(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t dma_addr, unsigned long attrs);
long arch_dma_coherent_to_pfn(struct device *dev, void *cpu_addr,
dma_addr_t dma_addr);
-
-#ifdef CONFIG_ARCH_HAS_DMA_MMAP_PGPROT
pgprot_t arch_dma_mmap_pgprot(struct device *dev, pgprot_t prot,
unsigned long attrs);
+
+#ifdef CONFIG_MMU
+pgprot_t dma_pgprot(struct device *dev, pgprot_t prot, unsigned long attrs);
#else
-# define arch_dma_mmap_pgprot(dev, prot, attrs) pgprot_noncached(prot)
-#endif
+static inline pgprot_t dma_pgprot(struct device *dev, pgprot_t prot,
+ unsigned long attrs)
+{
+ return prot; /* no protection bits supported without page tables */
+}
+#endif /* CONFIG_MMU */
#ifdef CONFIG_DMA_NONCOHERENT_CACHE_SYNC
void arch_dma_cache_sync(struct device *dev, void *vaddr, size_t size,