centos man page for remap_pfn_range

REMAP_PFN_RANGE(9)					    Memory Management in Linux						REMAP_PFN_RANGE(9)

NAME
       remap_pfn_range - remap kernel memory to userspace

SYNOPSIS
       int remap_pfn_range(struct vm_area_struct * vma, unsigned long addr, unsigned long pfn, unsigned long size, pgprot_t prot);

ARGUMENTS
       vma
	   user vma to map to

       addr
	   target user address to start at

       pfn
	   physical address of kernel memory

       size
	   size of map area

       prot
	   page protection flags for this mapping

NOTE
       this is only safe if the mm semaphore is held when called.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							REMAP_PFN_RANGE(9)