vm_insert_pfn (9) Linux Manual Page
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.