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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

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

January 2017 Kernel Hackers Manual 4.8.