diff options
| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-07-01 07:40:52 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-08-30 16:02:40 -0700 |
| commit | 65cfe3583b612a22e12fba9a7bbd2d37ca5ad941 (patch) | |
| tree | 66dcbed4b0f96f008ffdacd63f717ca4653f6b02 /include/linux/rcupdate.h | |
| parent | ba1c64c27239373be1b3d88cf0a9ac1b10fa871f (diff) | |
rcu: Define RCU-bh update API in terms of RCU
Now that the main RCU API knows about softirq disabling and softirq's
quiescent states, the RCU-bh update code can be dispensed with.
This commit therefore removes the RCU-bh update-side implementation and
defines RCU-bh's update-side API in terms of that of either RCU-preempt or
RCU-sched, depending on the setting of the CONFIG_PREEMPT Kconfig option.
In kernels built with CONFIG_RCU_NOCB_CPU=y this has the knock-on effect
of reducing by one the number of rcuo kthreads per CPU.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'include/linux/rcupdate.h')
| -rw-r--r-- | include/linux/rcupdate.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index 75e5b393cf44..9ebfd436cec7 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -55,11 +55,15 @@ void call_rcu(struct rcu_head *head, rcu_callback_t func); #define call_rcu call_rcu_sched #endif /* #else #ifdef CONFIG_PREEMPT_RCU */ -void call_rcu_bh(struct rcu_head *head, rcu_callback_t func); void call_rcu_sched(struct rcu_head *head, rcu_callback_t func); void synchronize_sched(void); void rcu_barrier_tasks(void); +static inline void call_rcu_bh(struct rcu_head *head, rcu_callback_t func) +{ + call_rcu(head, func); +} + #ifdef CONFIG_PREEMPT_RCU void __rcu_read_lock(void); @@ -104,7 +108,6 @@ static inline int rcu_preempt_depth(void) void rcu_init(void); extern int rcu_scheduler_active __read_mostly; void rcu_sched_qs(void); -void rcu_bh_qs(void); void rcu_check_callbacks(int user); void rcu_report_dead(unsigned int cpu); void rcutree_migrate_callbacks(int cpu); @@ -326,8 +329,7 @@ static inline void rcu_preempt_sleep_check(void) { } * and rcu_assign_pointer(). Some of these could be folded into their * callers, but they are left separate in order to ease introduction of * multiple flavors of pointers to match the multiple flavors of RCU - * (e.g., __rcu_bh, * __rcu_sched, and __srcu), should this make sense in - * the future. + * (e.g., __rcu_sched, and __srcu), should this make sense in the future. */ #ifdef __CHECKER__ |