From feee96440c9c5fdf47f8c8079c104fc8082924a0 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 13 Feb 2019 08:01:27 +0100 Subject: swiotlb: remove swiotlb_dma_supported The only user left is powerpc, but even there the generic dma-direct version works just as well, given that we guarantee that the swiotlb buffer must always be addressable. Signed-off-by: Christoph Hellwig Tested-by: Christian Zigotzky Signed-off-by: Michael Ellerman --- kernel/dma/swiotlb.c | 12 ------------ 1 file changed, 12 deletions(-) (limited to 'kernel/dma') diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index d6361776dc5c..cbf3498a46f9 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -648,15 +648,3 @@ bool swiotlb_map(struct device *dev, phys_addr_t *phys, dma_addr_t *dma_addr, return true; } - -/* - * Return whether the given device DMA address mask can be supported - * properly. For example, if your device can only drive the low 24-bits - * during bus mastering, then you would pass 0x00ffffff as the mask to - * this function. - */ -int -swiotlb_dma_supported(struct device *hwdev, u64 mask) -{ - return __phys_to_dma(hwdev, io_tlb_end - 1) <= mask; -} -- cgit