rcu_idle_exit9

Inform rcu that current cpu is leaving idle

Usage

void rcu_idle_exit(void);

Arguments

void

no arguments

Overview

Exit idle mode, in other words, -enter- the mode in which RCU read-side critical sections can occur.

We crowbar the ->dynticks_nesting field to DYNTICK_TASK_NEST to allow for the possibility of usermode upcalls messing up our count of interrupt nesting level during the busy period that is just now starting.