DMA_BUF_KUNMAP(9)                 Device drivers infrastructure                 DMA_BUF_KUNMAP(9)



NAME
       dma_buf_kunmap - Unmap a page obtained by dma_buf_kmap.

SYNOPSIS
       void dma_buf_kunmap(struct dma_buf * dmabuf, unsigned long page_num, void * vaddr);

ARGUMENTS
       dmabuf
           [in] buffer to unmap page from.

       page_num
           [in] page in PAGE_SIZE units to unmap.

       vaddr
           [in] kernel space pointer obtained from dma_buf_kmap.

DESCRIPTION
       This call must always succeed.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                         DMA_BUF_KUNMAP(9)