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/rcutiny.h | |
parent | ba1c64c27239373be1b3d88cf0a9ac1b10fa871f (diff) | |
download | linux-65cfe3583b612a22e12fba9a7bbd2d37ca5ad941.tar.gz linux-65cfe3583b612a22e12fba9a7bbd2d37ca5ad941.tar.bz2 linux-65cfe3583b612a22e12fba9a7bbd2d37ca5ad941.zip |
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/rcutiny.h')
-rw-r--r-- | include/linux/rcutiny.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h index bcfbc40a7239..ac26c27ccde8 100644 --- a/include/linux/rcutiny.h +++ b/include/linux/rcutiny.h @@ -56,19 +56,23 @@ static inline void cond_synchronize_sched(unsigned long oldstate) might_sleep(); } -extern void rcu_barrier_bh(void); -extern void rcu_barrier_sched(void); - static inline void synchronize_rcu_expedited(void) { synchronize_sched(); /* Only one CPU, so pretty fast anyway!!! */ } +extern void rcu_barrier_sched(void); + static inline void rcu_barrier(void) { rcu_barrier_sched(); /* Only one CPU, so only one list of callbacks! */ } +static inline void rcu_barrier_bh(void) +{ + rcu_barrier(); +} + static inline void synchronize_rcu_bh(void) { synchronize_sched(); |