follow_pfn (9) - Linux Manuals

follow_pfn: look up PFN at a user virtual address

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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