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rcu: Express Tiny RCU updates in terms of RCU rather than RCU-sched

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This commit renames Tiny RCU functions so that the lowest level of
functionality is RCU (e.g., synchronize_rcu()) rather than RCU-sched
(e.g., synchronize_sched()).  This provides greater naming compatibility
with Tree RCU, which will in turn permit more LoC removal once
the RCU-sched and RCU-bh update-side API is removed.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
[ paulmck: Fix Tiny call_rcu()'s EXPORT_SYMBOL() in response to a bug
  report from kbuild test robot. ]
This commit is contained in:
Paul E. McKenney 2018-07-03 10:44:44 -07:00
parent 45975c7d21
commit 709fdce754
4 changed files with 48 additions and 47 deletions
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34
include/linux/rcutiny.h
View file

@ -36,9 +36,9 @@ static inline int rcu_dynticks_snap(struct rcu_dynticks *rdtp)
/* Never flag non-existent other CPUs! */
static inline bool rcu_eqs_special_set(int cpu) { return false; }
static inline void synchronize_rcu(void)
static inline void synchronize_sched(void)
{
synchronize_sched();
synchronize_rcu();
}
static inline unsigned long get_state_synchronize_rcu(void)
@ -61,16 +61,11 @@ static inline void cond_synchronize_sched(unsigned long oldstate)
might_sleep();
}
static inline void synchronize_rcu_expedited(void)
{
synchronize_sched(); /* Only one CPU, so pretty fast anyway!!! */
}
extern void rcu_barrier(void);
extern void rcu_barrier_sched(void);
static inline void rcu_barrier(void)
static inline void rcu_barrier_sched(void)
{
rcu_barrier_sched(); /* Only one CPU, so only one list of callbacks! */
rcu_barrier(); /* Only one CPU, so only one list of callbacks! */
}
static inline void rcu_barrier_bh(void)
@ -88,27 +83,36 @@ static inline void synchronize_rcu_bh_expedited(void)
synchronize_sched();
}
static inline void synchronize_rcu_expedited(void)
{
synchronize_sched();
}
static inline void synchronize_sched_expedited(void)
{
synchronize_sched();
}
static inline void kfree_call_rcu(struct rcu_head *head,
rcu_callback_t func)
static inline void call_rcu_sched(struct rcu_head *head, rcu_callback_t func)
{
call_rcu(head, func);
}
void rcu_sched_qs(void);
static inline void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
{
call_rcu(head, func);
}
void rcu_qs(void);
static inline void rcu_softirq_qs(void)
{
rcu_sched_qs();
rcu_qs();
}
#define rcu_note_context_switch(preempt) \
do { \
rcu_sched_qs(); \
rcu_qs(); \
rcu_tasks_qs(current); \
} while (0)