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authorChristoph Hellwig <hch@lst.de>2018-12-03 12:28:35 +0100
committerChristoph Hellwig <hch@lst.de>2018-12-11 14:45:23 +0100
commit7227b202623986505c9dd6d2eadad977cd43625e (patch)
tree8cac35eca49ef29cb6f744f1cc0c97723e6f7313 /arch/sparc/kernel
parentdma-debug: Batch dma_debug_entry allocation (diff)
downloadlinux-7227b202623986505c9dd6d2eadad977cd43625e.tar.xz
linux-7227b202623986505c9dd6d2eadad977cd43625e.zip
sparc: remove not needed sbus_dma_ops methods
No need to BUG_ON() on the cache maintainance ops - they are no-ops by default, and there is nothing in the DMA API contract that prohibits calling them on sbus devices (even if such drivers are unlikely to ever appear). Similarly a dma_supported method that always returns 0 is rather pointless. The only thing that indicates is that no one ever calls the method on sbus devices. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel')
-rw-r--r--arch/sparc/kernel/ioport.c20
1 files changed, 0 insertions, 20 deletions
diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c
index 6799c93c9f27..4b2167a0ec0b 100644
--- a/arch/sparc/kernel/ioport.c
+++ b/arch/sparc/kernel/ioport.c
@@ -391,23 +391,6 @@ static void sbus_unmap_sg(struct device *dev, struct scatterlist *sg, int n,
mmu_release_scsi_sgl(dev, sg, n);
}
-static void sbus_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
- int n, enum dma_data_direction dir)
-{
- BUG();
-}
-
-static void sbus_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
- int n, enum dma_data_direction dir)
-{
- BUG();
-}
-
-static int sbus_dma_supported(struct device *dev, u64 mask)
-{
- return 0;
-}
-
static const struct dma_map_ops sbus_dma_ops = {
.alloc = sbus_alloc_coherent,
.free = sbus_free_coherent,
@@ -415,9 +398,6 @@ static const struct dma_map_ops sbus_dma_ops = {
.unmap_page = sbus_unmap_page,
.map_sg = sbus_map_sg,
.unmap_sg = sbus_unmap_sg,
- .sync_sg_for_cpu = sbus_sync_sg_for_cpu,
- .sync_sg_for_device = sbus_sync_sg_for_device,
- .dma_supported = sbus_dma_supported,
};
static int __init sparc_register_ioport(void)