Use sg_pfn to get a the PFN and skip checks that require a kernel virtual address. Signed-off-by: Christoph Hellwig <hch@xxxxxx> --- lib/dma-debug.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/lib/dma-debug.c b/lib/dma-debug.c index dace71f..a215a80 100644 --- a/lib/dma-debug.c +++ b/lib/dma-debug.c @@ -1368,7 +1368,7 @@ void debug_dma_map_sg(struct device *dev, struct scatterlist *sg, entry->type = dma_debug_sg; entry->dev = dev; - entry->pfn = page_to_pfn(sg_page(s)); + entry->pfn = sg_pfn(s); entry->offset = s->offset, entry->size = sg_dma_len(s); entry->dev_addr = sg_dma_address(s); @@ -1376,7 +1376,7 @@ void debug_dma_map_sg(struct device *dev, struct scatterlist *sg, entry->sg_call_ents = nents; entry->sg_mapped_ents = mapped_ents; - if (!PageHighMem(sg_page(s))) { + if (sg_has_page(s) && !PageHighMem(sg_page(s))) { check_for_stack(dev, sg_virt(s)); check_for_illegal_area(dev, sg_virt(s), sg_dma_len(s)); } @@ -1419,7 +1419,7 @@ void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist, struct dma_debug_entry ref = { .type = dma_debug_sg, .dev = dev, - .pfn = page_to_pfn(sg_page(s)), + .pfn = sg_pfn(s), .offset = s->offset, .dev_addr = sg_dma_address(s), .size = sg_dma_len(s), @@ -1580,7 +1580,7 @@ void debug_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, struct dma_debug_entry ref = { .type = dma_debug_sg, .dev = dev, - .pfn = page_to_pfn(sg_page(s)), + .pfn = sg_pfn(s), .offset = s->offset, .dev_addr = sg_dma_address(s), .size = sg_dma_len(s), @@ -1613,7 +1613,7 @@ void debug_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, struct dma_debug_entry ref = { .type = dma_debug_sg, .dev = dev, - .pfn = page_to_pfn(sg_page(s)), + .pfn = sg_pfn(s), .offset = s->offset, .dev_addr = sg_dma_address(s), .size = sg_dma_len(s), -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html