'\" t
.\"     Title: rcu_idle_enter
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Driver Basics
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "RCU_IDLE_ENTER" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Driver Basics"
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.SH "NAME"
rcu_idle_enter \- inform RCU that current CPU is entering idle
.SH "SYNOPSIS"
.HP \w'void\ rcu_idle_enter('u
.BI "void rcu_idle_enter(" "void" ");"
.SH "ARGUMENTS"
.PP
\fIvoid\fR
.RS 4
no arguments
.RE
.SH "DESCRIPTION"
.PP
.PP
Enter idle mode, in other words, \-leave\- the mode in which RCU read\-side critical sections can occur\&. (Though RCU read\-side critical sections can occur in irq handlers in idle, a possibility handled by
\fBirq_enter\fR
and
\fBirq_exit\fR\&.)
.PP
We crowbar the \->dynticks_nesting field to zero to allow for the possibility of usermode upcalls having messed up our count of interrupt nesting level during the prior busy period\&.
.SH "COPYRIGHT"
.br