VM_INSERT_PFN_PROT(9)               Memory Management in Linux              VM_INSERT_PFN_PROT(9)



NAME
       vm_insert_pfn_prot - insert single pfn into user vma with specified pgprot

SYNOPSIS
       int vm_insert_pfn_prot(struct vm_area_struct * vma, unsigned long addr, unsigned long pfn,
                              pgprot_t pgprot);

ARGUMENTS
       vma
           user vma to map to

       addr
           target user address of this page

       pfn
           source kernel pfn

       pgprot
           pgprot flags for the inserted page

DESCRIPTION
       This is exactly like vm_insert_pfn, except that it allows drivers to to override pgprot on
       a per-page basis.

       This only makes sense for IO mappings, and it makes no sense for cow mappings. In general,
       using multiple vmas is preferable; vm_insert_pfn_prot should only be used if using
       multiple VMAs is impractical.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                     VM_INSERT_PFN_PROT(9)