forked from luck/tmp_suning_uos_patched
rcu: shrink rcutiny by making synchronize_rcu_bh() be inline
Because synchronize_rcu_bh() is identical to synchronize_sched(), make the former a static inline invoking the latter, saving the overhead of an EXPORT_SYMBOL_GPL() and the duplicate code. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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@ -56,8 +56,6 @@ struct rcu_head {
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};
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/* Exported common interfaces */
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extern void synchronize_rcu_bh(void);
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extern void synchronize_sched(void);
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extern void rcu_barrier(void);
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extern void rcu_barrier_bh(void);
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extern void rcu_barrier_sched(void);
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@ -74,7 +74,17 @@ static inline void rcu_sched_force_quiescent_state(void)
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{
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}
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#define synchronize_rcu synchronize_sched
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extern void synchronize_sched(void);
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static inline void synchronize_rcu(void)
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{
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synchronize_sched();
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}
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static inline void synchronize_rcu_bh(void)
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{
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synchronize_sched();
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}
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static inline void synchronize_rcu_expedited(void)
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{
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@ -86,6 +86,8 @@ static inline void __rcu_read_unlock_bh(void)
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extern void call_rcu_sched(struct rcu_head *head,
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void (*func)(struct rcu_head *rcu));
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extern void synchronize_rcu_bh(void);
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extern void synchronize_sched(void);
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extern void synchronize_rcu_expedited(void);
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static inline void synchronize_rcu_bh_expedited(void)
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@ -187,7 +187,8 @@ static void rcu_process_callbacks(struct softirq_action *unused)
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*
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* Cool, huh? (Due to Josh Triplett.)
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*
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* But we want to make this a static inline later.
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* But we want to make this a static inline later. The cond_resched()
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* currently makes this problematic.
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*/
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void synchronize_sched(void)
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{
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@ -195,12 +196,6 @@ void synchronize_sched(void)
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}
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EXPORT_SYMBOL_GPL(synchronize_sched);
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void synchronize_rcu_bh(void)
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{
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synchronize_sched();
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}
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EXPORT_SYMBOL_GPL(synchronize_rcu_bh);
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/*
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* Helper function for call_rcu() and call_rcu_bh().
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*/
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