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.