FOLLOW_PFN
Section: Memory Management in Linux (9)
Updated: February 2011
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NAME
follow_pfn - look up PFN at a user virtual address
SYNOPSIS
-
int follow_pfn(struct vm_area_struct * vma, unsigned long address, unsigned long * pfn);
ARGUMENTS
vma
-
- memory mapping
address
-
user virtual address
pfn
-
location to store found PFN
DESCRIPTION
Only IO mappings and raw PFN mappings are allowed.
Returns zero and the pfn at
pfn
on success, -ve otherwise.
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