NAME¶

vm_insert_page - insert single page into user vma

SYNOPSIS¶

int vm_insert_page(struct vm_area_struct * vma, unsigned long addr, struct page * page);

ARGUMENTS¶

vma

addr

page

DESCRIPTION¶

This allows drivers to insert individual pages they´ve allocated into a user vma.

The page has to be a nice clean _individual_ kernel allocation. If you allocate a compound page, you need to have marked it as such (__GFP_COMP), or manually just split the page up yourself (see split_page).

NOTE! Traditionally this was done with “remap_pfn_range” which took an arbitrary page protection parameter. This doesn´t allow that. Your vma protection will have to be set up correctly, which means that if you want a shared writable mapping, you´d better ask for a shared writable mapping!

The page does not need to be reserved.

COPYRIGHT¶