diff options
| -rw-r--r-- | kernel/rcu/tree.c | 18 | ||||
| -rw-r--r-- | kernel/rcu/tree_plugin.h | 16 |
2 files changed, 18 insertions, 16 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 5e98257c2910..4ac019e9b25f 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -1076,6 +1076,24 @@ void rcu_irq_enter_irqson(void) } /* + * Check to see if any future non-offloaded RCU-related work will need + * to be done by the current CPU, even if none need be done immediately, + * returning 1 if so. This function is part of the RCU implementation; + * it is -not- an exported member of the RCU API. This is used by + * the idle-entry code to figure out whether it is safe to disable the + * scheduler-clock interrupt. + * + * Just check whether or not this CPU has non-offloaded RCU callbacks + * queued. + */ +int rcu_needs_cpu(u64 basemono, u64 *nextevt) +{ + *nextevt = KTIME_MAX; + return !rcu_segcblist_empty(&this_cpu_ptr(&rcu_data)->cblist) && + !rcu_rdp_is_offloaded(this_cpu_ptr(&rcu_data)); +} + +/* * If any sort of urgency was applied to the current CPU (for example, * the scheduler-clock interrupt was enabled on a nohz_full CPU) in order * to get to a quiescent state, disable it. diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 19f7d578cedb..0575757a0f8f 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -1252,22 +1252,6 @@ static void __init rcu_spawn_boost_kthreads(void) #endif /* #else #ifdef CONFIG_RCU_BOOST */ /* - * Check to see if any future non-offloaded RCU-related work will need - * to be done by the current CPU, even if none need be done immediately, - * returning 1 if so. This function is part of the RCU implementation; - * it is -not- an exported member of the RCU API. - * - * Just check whether or not this CPU has non-offloaded RCU callbacks - * queued. - */ -int rcu_needs_cpu(u64 basemono, u64 *nextevt) -{ - *nextevt = KTIME_MAX; - return !rcu_segcblist_empty(&this_cpu_ptr(&rcu_data)->cblist) && - !rcu_rdp_is_offloaded(this_cpu_ptr(&rcu_data)); -} - -/* * Is this CPU a NO_HZ_FULL CPU that should ignore RCU so that the * grace-period kthread will do force_quiescent_state() processing? * The idea is to avoid waking up RCU core processing on such a |