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swiotlb: remove swiotlb_dma_supported

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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 <hch@lst.de>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christoph Hellwig 2019-02-13 08:01:27 +01:00 • committed by Michael Ellerman
parent 65a21b71f9
commit feee96440c
3 changed files with 1 additions and 16 deletions
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3
include/linux/swiotlb.h
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@ -60,9 +60,6 @@ extern void swiotlb_tbl_sync_single(struct device *hwdev,
size_t size, enum dma_data_direction dir,
enum dma_sync_target target);
extern int
swiotlb_dma_supported(struct device *hwdev, u64 mask);
#ifdef CONFIG_SWIOTLB
extern enum swiotlb_force swiotlb_force;
extern phys_addr_t io_tlb_start, io_tlb_end;