1DMA_BUF_KMAP(9) Device drivers infrastructure DMA_BUF_KMAP(9)
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6 dma_buf_kmap - Map a page of the buffer object into kernel address
7 space. The same restrictions as for kmap and friends apply.
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10 void * dma_buf_kmap(struct dma_buf * dmabuf, unsigned long page_num);
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13 dmabuf
14 [in] buffer to map page from.
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16 page_num
17 [in] page in PAGE_SIZE units to map.
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20 This call must always succeed, any necessary preparations that might
21 fail need to be done in begin_cpu_access.
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24Kernel Hackers Manual 2.6. June 2019 DMA_BUF_KMAP(9)