centos man page for vm_insert_pfn

VM_INSERT_PFN(9)					    Memory Management in Linux						  VM_INSERT_PFN(9)

NAME
       vm_insert_pfn - insert single pfn into user vma

SYNOPSIS
       int vm_insert_pfn(struct vm_area_struct * vma, unsigned long addr, unsigned long pfn);

ARGUMENTS
       vma
	   user vma to map to

       addr
	   target user address of this page

       pfn
	   source kernel pfn

DESCRIPTION
       Similar to vm_insert_page, this allows drivers to insert individual pages they've allocated into a user vma. Same comments apply.

       This function should only be called from a vm_ops->fault handler, and in that case the handler should return NULL.

       vma cannot be a COW mapping.

       As this is called only for pages that do not currently exist, we do not need to flush old virtual caches or the TLB.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							  VM_INSERT_PFN(9)