1FOLLOW_PFN(9)             Memory Management in Linux             FOLLOW_PFN(9)
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NAME

6       follow_pfn - look up PFN at a user virtual address
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SYNOPSIS

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

13       vma
14           memory mapping
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16       address
17           user virtual address
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19       pfn
20           location to store found PFN
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DESCRIPTION

23       Only IO mappings and raw PFN mappings are allowed.
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25       Returns zero and the pfn at pfn on success, -ve otherwise.
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28Kernel Hackers Manual 3.10         June 2019                     FOLLOW_PFN(9)
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