dma_buf_kmap_atomic(9) centos man page | unix.com

DMA_BUF_KMAP_ATOMIC(9)					   Device drivers infrastructure				    DMA_BUF_KMAP_ATOMIC(9)

NAME
       dma_buf_kmap_atomic - Map a page of the buffer object into kernel address space. The same restrictions as for kmap_atomic and friends
       apply.

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

ARGUMENTS
       dmabuf
	   [in] buffer to map page from.

       page_num
	   [in] page in PAGE_SIZE units to map.

DESCRIPTION
       This call must always succeed, any necessary preparations that might fail need to be done in begin_cpu_access.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						    DMA_BUF_KMAP_ATOMIC(9)