On Sun, Mar 25, 2018 at 08:50:03PM +0300, Yury Norov wrote: > rcu_eqs_special_set() is declared only in internal header > kernel/rcu/tree.h and stubbed in include/linux/rcutiny.h. > > This patch declares rcu_eqs_special_set() in include/linux/rcutree.h, so > it can be used in non-rcu kernel code. > > Signed-off-by: Yury Norov <ynorov@xxxxxxxxxxxxxxxxxx> > --- > include/linux/rcutree.h | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h > index fd996cdf1833..448f20f27396 100644 > --- a/include/linux/rcutree.h > +++ b/include/linux/rcutree.h > @@ -74,6 +74,7 @@ static inline void synchronize_rcu_bh_expedited(void) > void rcu_barrier(void); > void rcu_barrier_bh(void); > void rcu_barrier_sched(void); > +bool rcu_eqs_special_set(int cpu); > unsigned long get_state_synchronize_rcu(void); > void cond_synchronize_rcu(unsigned long oldstate); > unsigned long get_state_synchronize_sched(void); Good point, a bit hard to use otherwise. ;-) I removed the declaration from rcutree.h and updated the commit log as follows. Does it look OK? Thanx, Paul ------------------------------------------------------------------------ commit 4497105b718a819072d48a675916d9d200b5327f Author: Yury Norov <ynorov@xxxxxxxxxxxxxxxxxx> Date: Sun Mar 25 20:50:03 2018 +0300 rcu: Declare rcu_eqs_special_set() in public header Because rcu_eqs_special_set() is declared only in internal header kernel/rcu/tree.h and stubbed in include/linux/rcutiny.h, it is inaccessible outside of the RCU implementation. This patch therefore moves the rcu_eqs_special_set() declaration to include/linux/rcutree.h, which allows it to be used in non-rcu kernel code. Signed-off-by: Yury Norov <ynorov@xxxxxxxxxxxxxxxxxx> Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h index fd996cdf1833..448f20f27396 100644 --- a/include/linux/rcutree.h +++ b/include/linux/rcutree.h @@ -74,6 +74,7 @@ static inline void synchronize_rcu_bh_expedited(void) void rcu_barrier(void); void rcu_barrier_bh(void); void rcu_barrier_sched(void); +bool rcu_eqs_special_set(int cpu); unsigned long get_state_synchronize_rcu(void); void cond_synchronize_rcu(unsigned long oldstate); unsigned long get_state_synchronize_sched(void); diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index 59ad0e23c722..d5f617aaa744 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -415,7 +415,6 @@ extern struct rcu_state rcu_preempt_state; #endif /* #ifdef CONFIG_PREEMPT_RCU */ int rcu_dynticks_snap(struct rcu_dynticks *rdtp); -bool rcu_eqs_special_set(int cpu); #ifdef CONFIG_RCU_BOOST DECLARE_PER_CPU(unsigned int, rcu_cpu_kthread_status);