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| author | Vegard Nossum <vegard.nossum@gmail.com> | 2009-02-21 15:52:37 +0300 |
|---|---|---|
| committer | Vegard Nossum <vegard.nossum@gmail.com> | 2009-06-15 14:40:13 +0400 |
| commit | 9b5cab31897e9e89e36c0c2a89b16b93ff1a971a (patch) | |
| tree | 8ebc2d3c5e380f24239b108a447a1158ad1f56c7 /arch/x86 | |
| parent | 9e730237c2cb479649207da1be2114c28d2fcf51 (diff) | |
| download | linux-9b5cab31897e9e89e36c0c2a89b16b93ff1a971a.tar.xz | |
kmemcheck: add hooks for page- and sg-dma-mappings
This is needed for page allocator support to prevent false positives
when accessing pages which are dma-mapped.
[rebased for mainline inclusion]
Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/dma-mapping.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h index d57d0c1857bc..b93405b228b4 100644 --- a/arch/x86/include/asm/dma-mapping.h +++ b/arch/x86/include/asm/dma-mapping.h @@ -89,8 +89,12 @@ dma_map_sg(struct device *hwdev, struct scatterlist *sg, { struct dma_map_ops *ops = get_dma_ops(hwdev); int ents; + struct scatterlist *s; + int i; BUG_ON(!valid_dma_direction(dir)); + for_each_sg(sg, s, nents, i) + kmemcheck_mark_initialized(sg_virt(s), s->length); ents = ops->map_sg(hwdev, sg, nents, dir, NULL); debug_dma_map_sg(hwdev, sg, nents, ents, dir); @@ -202,6 +206,7 @@ static inline dma_addr_t dma_map_page(struct device *dev, struct page *page, dma_addr_t addr; BUG_ON(!valid_dma_direction(dir)); + kmemcheck_mark_initialized(page_address(page) + offset, size); addr = ops->map_page(dev, page, offset, size, dir, NULL); debug_dma_map_page(dev, page, offset, size, dir, addr, false); |