diff options
Diffstat (limited to 'include/linux/rcutree.h')
| -rw-r--r-- | include/linux/rcutree.h | 33 |
1 files changed, 8 insertions, 25 deletions
diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h index d4368b7975c3..0cdda00f2b2a 100644 --- a/include/linux/rcutree.h +++ b/include/linux/rcutree.h @@ -33,7 +33,6 @@ #include <linux/cache.h> #include <linux/spinlock.h> #include <linux/threads.h> -#include <linux/percpu.h> #include <linux/cpumask.h> #include <linux/seqlock.h> @@ -236,30 +235,8 @@ struct rcu_state { #endif /* #ifdef CONFIG_NO_HZ */ }; -extern struct rcu_state rcu_state; -DECLARE_PER_CPU(struct rcu_data, rcu_data); - -extern struct rcu_state rcu_bh_state; -DECLARE_PER_CPU(struct rcu_data, rcu_bh_data); - -/* - * Increment the quiescent state counter. - * The counter is a bit degenerated: We do not need to know - * how many quiescent states passed, just if there was at least - * one since the start of the grace period. Thus just a flag. - */ -static inline void rcu_qsctr_inc(int cpu) -{ - struct rcu_data *rdp = &per_cpu(rcu_data, cpu); - rdp->passed_quiesc = 1; - rdp->passed_quiesc_completed = rdp->completed; -} -static inline void rcu_bh_qsctr_inc(int cpu) -{ - struct rcu_data *rdp = &per_cpu(rcu_bh_data, cpu); - rdp->passed_quiesc = 1; - rdp->passed_quiesc_completed = rdp->completed; -} +extern void rcu_qsctr_inc(int cpu); +extern void rcu_bh_qsctr_inc(int cpu); extern int rcu_pending(int cpu); extern int rcu_needs_cpu(int cpu); @@ -326,4 +303,10 @@ static inline void rcu_exit_nohz(void) } #endif /* CONFIG_NO_HZ */ +/* A context switch is a grace period for rcutree. */ +static inline int rcu_blocking_is_gp(void) +{ + return num_online_cpus() == 1; +} + #endif /* __LINUX_RCUTREE_H */ |