riscv: remove the unused dma_capable helper

Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/arch/riscv/include/asm/dma-mapping.h b/arch/riscv/include/asm/dma-mapping.h
index 3eec1000196d55d9d80a154584726d09e99b8467..73849e2cc761d13e027cf4fd9e746a9bf686a9c2 100644 (file)
--- a/arch/riscv/include/asm/dma-mapping.h
+++ b/arch/riscv/include/asm/dma-mapping.h
@@ -27,12 +27,4 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
        return &dma_noop_ops;
 }
 
-static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
-{
-       if (!dev->dma_mask)
-               return false;
-
-       return addr + size - 1 <= *dev->dma_mask;
-}
-
 #endif /* __ASM_RISCV_DMA_MAPPING_H */