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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

struct vm_area_struct * vma

memory mapping

unsigned long address

user virtual address

unsigned long * 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

June 2017 Kernel Hackers Manual 4.11