1. NAME▲

follow_pfn - look up PFN at a user virtual address

2. SYNOPSIS ▲

int follow_pfn(struct vm_area_struct *  vma , unsigned long  address , unsigned long *  pfn );

3. ARGUMENTS ▲

vma
    memory mapping

address
    user virtual address

pfn
    location to store found PFN

4. DESCRIPTION ▲

Only IO mappings and raw PFN mappings are allowed.

Returns zero and the pfn at pfn on success, -ve otherwise.

5. COPYRIGHT ▲