'\" t
.\"     Title: virt_to_phys
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Public Functions Provided
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "VIRT_TO_PHYS" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Public Functions Provided"
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.SH "NAME"
virt_to_phys \- map virtual addresses to physical
.SH "SYNOPSIS"
.HP \w'phys_addr_t\ virt_to_phys('u
.BI "phys_addr_t virt_to_phys(volatile\ void\ *\ " "address" ");"
.SH "ARGUMENTS"
.PP
\fIaddress\fR
.RS 4
address to remap
.RE
.SH "DESCRIPTION"
.PP
The returned physical address is the physical (CPU) mapping for the memory address given\&. It is only valid to use this function on addresses directly mapped or allocated via kmalloc\&.
.PP
This function does not give bus mappings for DMA transfers\&. In almost all conceivable cases a device driver should not be using this function
.SH "AUTHORS"
.PP
\fBMatthew Wilcox\fR <\&matthew@wil.cx\&>
.RS 4
Author.
.RE
.PP
\fBAlan Cox\fR <\&alan@lxorguk.ukuu.org.uk\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br