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| author |   Christoph Hellwig <hch@lst.de> | 2019-06-03 09:14:31 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2019-09-04 11:13:20 +0200 |
| commit | 5cf4537975bbd5691b9ddd015d540bb92f61e322 (patch) | |
| tree | f77c8831902447d5c079eb8d36d4819d426d6e06 /include/linux/dma-mapping.h | |
| parent | dma-mapping: always use VM_DMA_COHERENT for generic DMA remap (diff) | |
| download | wireguard-linux-5cf4537975bbd5691b9ddd015d540bb92f61e322.tar.xz wireguard-linux-5cf4537975bbd5691b9ddd015d540bb92f61e322.zip | |
dma-mapping: introduce a dma_common_find_pages helper
A helper to find the backing page array based on a virtual address.
This also ensures we do the same vm_flags check everywhere instead
of slightly different or missing ones in a few places.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'include/linux/dma-mapping.h')
| -rw-r--r-- | include/linux/dma-mapping.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 86223bc24d82..746fa5d6850c 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -626,6 +626,7 @@ extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma, void *cpu_addr, dma_addr_t dma_addr, size_t size, unsigned long attrs); +struct page **dma_common_find_pages(void *cpu_addr); void *dma_common_contiguous_remap(struct page *page, size_t size, pgprot_t prot, const void *caller); |