FOLLOW_PFN(9) Memory Management in Linux FOLLOW_PFN(9)

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.

COPYRIGHT Kernel Hackers Manual 2.6. May 2011 FOLLOW_PFN(9)