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rcu: Move rcu_needs_cpu() to tree.c
Now that RCU_FAST_NO_HZ is no more, there is but one implementation of the rcu_needs_cpu() function. This commit therefore moves this function from kernel/rcu/tree_plugin.c to kernel/rcu/tree.c. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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2 changed files with 18 additions and 16 deletions
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@ -1075,6 +1075,24 @@ void rcu_irq_enter_irqson(void)
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local_irq_restore(flags);
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}
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/*
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* Check to see if any future non-offloaded RCU-related work will need
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* to be done by the current CPU, even if none need be done immediately,
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* returning 1 if so. This function is part of the RCU implementation;
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* it is -not- an exported member of the RCU API. This is used by
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* the idle-entry code to figure out whether it is safe to disable the
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* scheduler-clock interrupt.
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*
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* Just check whether or not this CPU has non-offloaded RCU callbacks
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* queued.
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*/
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int rcu_needs_cpu(u64 basemono, u64 *nextevt)
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{
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*nextevt = KTIME_MAX;
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return !rcu_segcblist_empty(&this_cpu_ptr(&rcu_data)->cblist) &&
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!rcu_rdp_is_offloaded(this_cpu_ptr(&rcu_data));
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}
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/*
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* If any sort of urgency was applied to the current CPU (for example,
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* the scheduler-clock interrupt was enabled on a nohz_full CPU) in order
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@ -1251,22 +1251,6 @@ static void __init rcu_spawn_boost_kthreads(void)
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#endif /* #else #ifdef CONFIG_RCU_BOOST */
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/*
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* Check to see if any future non-offloaded RCU-related work will need
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* to be done by the current CPU, even if none need be done immediately,
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* returning 1 if so. This function is part of the RCU implementation;
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* it is -not- an exported member of the RCU API.
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*
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* Just check whether or not this CPU has non-offloaded RCU callbacks
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* queued.
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*/
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int rcu_needs_cpu(u64 basemono, u64 *nextevt)
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{
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*nextevt = KTIME_MAX;
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return !rcu_segcblist_empty(&this_cpu_ptr(&rcu_data)->cblist) &&
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!rcu_rdp_is_offloaded(this_cpu_ptr(&rcu_data));
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}
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/*
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* Is this CPU a NO_HZ_FULL CPU that should ignore RCU so that the
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* grace-period kthread will do force_quiescent_state() processing?
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