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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

struct vm_area_struct * vma

user vma to map to

unsigned long addr

target user address of this page

unsigned long pfn

source kernel pfn

pgprot_t 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

June 2017 Kernel Hackers Manual 4.11