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authorChristoph Hellwig <hch@lst.de>2018-12-06 18:06:04 +0300
committerChristoph Hellwig <hch@lst.de>2018-12-13 23:06:14 +0300
commit68c608345cc569bcfa1c1b2add4c00c343ecf933 (patch)
tree87bded168f1a45c71ac669f5a316663ac5ce3ed8 /kernel/dma
parentb907e20508d02462a50c2841da0a5e3883fdab39 (diff)
downloadlinux-68c608345cc569bcfa1c1b2add4c00c343ecf933.tar.xz
swiotlb: remove dma_mark_clean
Instead of providing a special dma_mark_clean hook just for ia64, switch ia64 to use the normal arch_sync_dma_for_cpu hooks instead. This means that we now also set the PG_arch_1 bit for pages in the swiotlb buffer, which isn't stricly needed as we will never execute code out of the swiotlb buffer, but otherwise harmless. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Jesper Dangaard Brouer <brouer@redhat.com> Tested-by: Jesper Dangaard Brouer <brouer@redhat.com> Tested-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'kernel/dma')
-rw-r--r--kernel/dma/swiotlb.c18
1 files changed, 1 insertions, 17 deletions
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 19ba8e473d71..2e126bac5d7d 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -706,21 +706,8 @@ void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
(attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
arch_sync_dma_for_cpu(hwdev, paddr, size, dir);
- if (is_swiotlb_buffer(paddr)) {
+ if (is_swiotlb_buffer(paddr))
swiotlb_tbl_unmap_single(hwdev, paddr, size, dir, attrs);
- return;
- }
-
- if (dir != DMA_FROM_DEVICE)
- return;
-
- /*
- * phys_to_virt doesn't work with hihgmem page but we could
- * call dma_mark_clean() with hihgmem page here. However, we
- * are fine since dma_mark_clean() is null on POWERPC. We can
- * make dma_mark_clean() take a physical address if necessary.
- */
- dma_mark_clean(phys_to_virt(paddr), size);
}
/*
@@ -750,9 +737,6 @@ swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
if (!dev_is_dma_coherent(hwdev) && target == SYNC_FOR_DEVICE)
arch_sync_dma_for_device(hwdev, paddr, size, dir);
-
- if (!is_swiotlb_buffer(paddr) && dir == DMA_FROM_DEVICE)
- dma_mark_clean(phys_to_virt(paddr), size);
}
void