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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>
This commit is contained in:
Vegard Nossum 2009-02-21 13:52:37 +01:00
parent 9e730237c2
commit 9b5cab3189
1 changed files with 5 additions and 0 deletions
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5
arch/x86/include/asm/dma-mapping.h
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@ -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);