'\" t
.\"     Title: memzero_explicit
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: June 2017
.\"    Manual: Basic C Library Functions
.\"    Source: Kernel Hackers Manual 4.11.3
.\"  Language: English
.\"
.TH "MEMZERO_EXPLICIT" "9" "June 2017" "Kernel Hackers Manual 4\&.11\&" "Basic C Library Functions"
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.SH "NAME"
memzero_explicit \- Fill a region of memory (e\&.g\&. sensitive keying data) with 0s\&.
.SH "SYNOPSIS"
.HP \w'void\ memzero_explicit('u
.BI "void memzero_explicit(void\ *\ " "s" ", size_t\ " "count" ");"
.SH "ARGUMENTS"
.PP
\fIvoid * s\fR
.RS 4
Pointer to the start of the area\&.
.RE
.PP
\fIsize_t count\fR
.RS 4
The size of the area\&.
.RE
.SH "NOTE"
.PP
usually using
\fBmemset\fR
is just fine (!), but in cases where clearing out _local_ data at the end of a scope is necessary,
\fBmemzero_explicit\fR
should be used instead in order to prevent the compiler from optimising away zeroing\&.
.PP
\fBmemzero_explicit\fR
doesn\*(Aqt need an arch\-specific version as it just invokes the one of
\fBmemset\fR
implicitly\&.
.SH "COPYRIGHT"
.br