}
#endif /* CONFIG_NO_HZ_FULL */
-/*
+/**
+ * rcu_nmi_exit - inform RCU of exit from NMI context
+ *
* If we are returning from the outermost NMI handler that interrupted an
* RCU-idle period, update rdp->dynticks and rdp->dynticks_nmi_nesting
* to let the RCU grace-period handling know that the CPU is back to
* being RCU-idle.
*
- * If you add or remove a call to rcu_nmi_exit_common(), be sure to test
+ * If you add or remove a call to rcu_nmi_exit(), be sure to test
* with CONFIG_RCU_EQS_DEBUG=y.
*/
-static __always_inline void rcu_nmi_exit_common(bool irq)
+noinstr void rcu_nmi_exit(void)
{
struct rcu_data *rdp = this_cpu_ptr(&rcu_data);
trace_rcu_dyntick(TPS("Startirq"), rdp->dynticks_nmi_nesting, 0, atomic_read(&rdp->dynticks));
WRITE_ONCE(rdp->dynticks_nmi_nesting, 0); /* Avoid store tearing. */
- if (irq)
+ if (!in_nmi())
rcu_prepare_for_idle();
instrumentation_end();
rcu_dynticks_eqs_enter();
// ... but is no longer watching here.
- if (irq)
+ if (!in_nmi())
rcu_dynticks_task_enter();
}
/**
- * rcu_nmi_exit - inform RCU of exit from NMI context
- *
- * If you add or remove a call to rcu_nmi_exit(), be sure to test
- * with CONFIG_RCU_EQS_DEBUG=y.
- */
-void noinstr rcu_nmi_exit(void)
-{
- rcu_nmi_exit_common(false);
-}
-
-/**
* rcu_irq_exit - inform RCU that current CPU is exiting irq towards idle
*
* Exit from an interrupt handler, which might possibly result in entering
void noinstr rcu_irq_exit(void)
{
lockdep_assert_irqs_disabled();
- rcu_nmi_exit_common(true);
+ rcu_nmi_exit();
}
/*
#endif /* CONFIG_NO_HZ_FULL */
/**
- * rcu_nmi_enter_common - inform RCU of entry to NMI context
+ * rcu_nmi_enter - inform RCU of entry to NMI context
* @irq: Is this call from rcu_irq_enter?
*
* If the CPU was idle from RCU's viewpoint, update rdp->dynticks and
* long as the nesting level does not overflow an int. (You will probably
* run out of stack space first.)
*
- * If you add or remove a call to rcu_nmi_enter_common(), be sure to test
+ * If you add or remove a call to rcu_nmi_enter(), be sure to test
* with CONFIG_RCU_EQS_DEBUG=y.
*/
-static __always_inline void rcu_nmi_enter_common(bool irq)
+noinstr void rcu_nmi_enter(void)
{
long incby = 2;
struct rcu_data *rdp = this_cpu_ptr(&rcu_data);
*/
if (rcu_dynticks_curr_cpu_in_eqs()) {
- if (irq)
+ if (!in_nmi())
rcu_dynticks_task_exit();
// RCU is not watching here ...
rcu_dynticks_eqs_exit();
// ... but is watching here.
- if (irq)
+ if (!in_nmi())
rcu_cleanup_after_idle();
incby = 1;
- } else if (irq) {
+ } else if (!in_nmi()) {
instrumentation_begin();
if (tick_nohz_full_cpu(rdp->cpu) &&
rdp->dynticks_nmi_nesting == DYNTICK_IRQ_NONIDLE &&
}
/**
- * rcu_nmi_enter - inform RCU of entry to NMI context
- */
-noinstr void rcu_nmi_enter(void)
-{
- rcu_nmi_enter_common(false);
-}
-
-/**
* rcu_irq_enter - inform RCU that current CPU is entering irq away from idle
*
* Enter an interrupt handler, which might possibly result in exiting
noinstr void rcu_irq_enter(void)
{
lockdep_assert_irqs_disabled();
- rcu_nmi_enter_common(true);
+ rcu_nmi_enter();
}
/*