'\" t
.\"     Title: remap_pfn_range
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: July 2017
.\"    Manual: Memory Management in Linux
.\"    Source: Kernel Hackers Manual 4.11.6
.\"  Language: English
.\"
.TH "REMAP_PFN_RANGE" "9" "July 2017" "Kernel Hackers Manual 4\&.11\&" "Memory Management in Linux"
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.SH "NAME"
remap_pfn_range \- remap kernel memory to userspace
.SH "SYNOPSIS"
.HP \w'int\ remap_pfn_range('u
.BI "int remap_pfn_range(struct\ vm_area_struct\ *\ " "vma" ", unsigned\ long\ " "addr" ", unsigned\ long\ " "pfn" ", unsigned\ long\ " "size" ", pgprot_t\ " "prot" ");"
.SH "ARGUMENTS"
.PP
\fIstruct vm_area_struct * vma\fR
.RS 4
user vma to map to
.RE
.PP
\fIunsigned long addr\fR
.RS 4
target user address to start at
.RE
.PP
\fIunsigned long pfn\fR
.RS 4
physical address of kernel memory
.RE
.PP
\fIunsigned long size\fR
.RS 4
size of map area
.RE
.PP
\fIpgprot_t prot\fR
.RS 4
page protection flags for this mapping
.RE
.SH "NOTE"
.PP
this is only safe if the mm semaphore is held when called\&.
.SH "COPYRIGHT"
.br