centos man page for dma_buf_vmap

DMA_BUF_VMAP(9) 					   Device drivers infrastructure					   DMA_BUF_VMAP(9)

NAME
       dma_buf_vmap - Create virtual mapping for the buffer object into kernel address space. Same restrictions as for vmap and friends apply.

SYNOPSIS
       void * dma_buf_vmap(struct dma_buf * dmabuf);

ARGUMENTS
       dmabuf
	   [in] buffer to vmap

DESCRIPTION
       This call may fail due to lack of virtual mapping address space. These calls are optional in drivers. The intended use for them is for
       mapping objects linear in kernel space for high use objects. Please attempt to use kmap/kunmap before thinking about these interfaces.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							   DMA_BUF_VMAP(9)