---
name: "pmap_clear_reference"
section: "9"
platform: "linux"
package: "freebsd-manpages"
version: "6.0-5"
release: "Debian 4.0 (Etch)"
platforms: ["linux"]
url: "https://new.carta.tech/pmap_clear_reference"
---

# pmap\_clear\_reference(9)

set information about physical pages

## NAME

**pmap\_clear\_modify**, **pmap\_clear\_reference** – set information about physical pages

## SYNOPSIS

**#include \<sys/param.h\>**

**#include \<vm/vm.h\>**

**#include \<vm/pmap.h\>**

*void*\

**pmap\_clear\_modify**(*vm\_page\_t m*);

*void*\

**pmap\_clear\_reference**(*vm\_page\_t m*);

## DESCRIPTION

The **pmap\_clear\_modify**() function clears the “modified” bit on the physical page *m*.

The **pmap\_clear\_reference**() function clears the “referenced” bit on the physical page *m*.

## SEE ALSO

[pmap(9)](/pmap/9.md), [pmap\_is\_modified(9)](/pmap_is_modified/9.md), [pmap\_ts\_referenced(9)](/pmap_ts_referenced/9.md)

## AUTHORS

This manual page was written by Bruce M Simpson ⟨bms@spc.org⟩.