---
name: "pmap_zero_page"
section: "9"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["linux", "freebsd"]
url: "https://new.carta.tech/pmap_zero_area"
---

# pmap\_zero\_page(9)

zero-fill a page using machine-dependent optimizations

Part of [pmap\_zero\_area(9)](/pmap_zero_area/9.md).

## NAME

**pmap\_zero\_page**, **pmap\_zero\_area** – zero-fill a page using machine-dependent optimizations

## SYNOPSIS

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

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

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

*void*\

**pmap\_zero\_page**(*vm\_page\_t m*);

*void*\

**pmap\_zero\_page\_area**(*vm\_page\_t m*, *int off*, *int size*);

## DESCRIPTION

The **pmap\_zero\_page**() function zero-fills an entire page using machine-dependent optimizations. The **pmap\_zero\_page\_area**() function is used to zero-fill an area of a page. The range specified must not cross a page boundary; it must be contained entirely within a single page.

## IMPLEMENTATION NOTES

This function is required to be implemented for each architecture supported by FreeBSD.

## SEE ALSO

[bzero(3)](/bzero/3.md), [pmap(9)](/pmap/9.md)

## AUTHORS

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