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RCU_IDLE_ENTER(9) Driver Basics RCU_IDLE_ENTER(9)

NAME

rcu_idle_enter - inform RCU that current CPU is entering idle

SYNOPSIS

void rcu_idle_enter(void);

ARGUMENTS

void
no arguments

DESCRIPTION

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 irq_enter and irq_exit.)
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.

COPYRIGHT

January 2017 Kernel Hackers Manual 4.8.