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rcu: Consolidate RCU-sched update-side function definitions 

This commit saves a few lines by consolidating the RCU-sched function
definitions at the end of include/linux/rcupdate.h.  This consolidation
also makes it easier to remove them all when the time comes.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2018-07-06 11:46:47 -07:00
parent 4c7e9c1434
commit a8bb74acd8
4 changed files with 32 additions and 105 deletions
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38
include/linux/rcupdate.h
View File

@ -48,12 +48,6 @@
#define ulong2long(a) (*(long *)(&(a)))
/* Exported common interfaces */
#ifndef CONFIG_TINY_RCU
void synchronize_sched(void);
void call_rcu_sched(struct rcu_head *head, rcu_callback_t func);
#endif
void call_rcu(struct rcu_head *head, rcu_callback_t func);
void rcu_barrier_tasks(void);
void synchronize_rcu(void);
@ -170,7 +164,7 @@ void exit_tasks_rcu_finish(void);
#define rcu_tasks_qs(t) do { } while (0)
#define rcu_note_voluntary_context_switch(t) rcu_all_qs()
#define call_rcu_tasks call_rcu_sched
#define synchronize_rcu_tasks synchronize_sched
#define synchronize_rcu_tasks synchronize_rcu
static inline void exit_tasks_rcu_start(void) { }
static inline void exit_tasks_rcu_finish(void) { }
#endif /* #else #ifdef CONFIG_TASKS_RCU */
@ -892,4 +886,34 @@ static inline void rcu_barrier_bh(void)
rcu_barrier();
}
static inline void synchronize_sched(void)
{
synchronize_rcu();
}
static inline void synchronize_sched_expedited(void)
{
synchronize_rcu_expedited();
}
static inline void call_rcu_sched(struct rcu_head *head, rcu_callback_t func)
{
call_rcu(head, func);
}
static inline void rcu_barrier_sched(void)
{
rcu_barrier();
}
static inline unsigned long get_state_synchronize_sched(void)
{
return get_state_synchronize_rcu();
}
static inline void cond_synchronize_sched(unsigned long oldstate)
{
cond_synchronize_rcu(oldstate);
}
#endif /* __LINUX_RCUPDATE_H */

32
include/linux/rcutiny.h
View File

@ -36,11 +36,6 @@ 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_sched(void)
{
synchronize_rcu();
}
static inline unsigned long get_state_synchronize_rcu(void)
{
return 0;
@ -51,36 +46,11 @@ static inline void cond_synchronize_rcu(unsigned long oldstate)
might_sleep();
}
static inline unsigned long get_state_synchronize_sched(void)
{
return 0;
}
static inline void cond_synchronize_sched(unsigned long oldstate)
{
might_sleep();
}
extern void rcu_barrier(void);
static inline void rcu_barrier_sched(void)
{
rcu_barrier(); /* Only one CPU, so only one list of callbacks! */
}
static inline void synchronize_rcu_expedited(void)
{
synchronize_sched();
}
static inline void synchronize_sched_expedited(void)
{
synchronize_sched();
}
static inline void call_rcu_sched(struct rcu_head *head, rcu_callback_t func)
{
call_rcu(head, func);
synchronize_rcu();
}
static inline void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func)

9
include/linux/rcutree.h
View File

@ -46,21 +46,12 @@ static inline void rcu_virt_note_context_switch(int cpu)
}
void synchronize_rcu_expedited(void);
static inline void synchronize_sched_expedited(void)
{
synchronize_rcu_expedited();
}
void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func);
void rcu_barrier(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);
void cond_synchronize_sched(unsigned long oldstate);
void rcu_idle_enter(void);
void rcu_idle_exit(void);

58
kernel/rcu/tree.c
View File

@ -2950,19 +2950,6 @@ void call_rcu(struct rcu_head *head, rcu_callback_t func)
}
EXPORT_SYMBOL_GPL(call_rcu);
/**
* call_rcu_sched() - Queue an RCU for invocation after sched grace period.
* @head: structure to be used for queueing the RCU updates.
* @func: actual callback function to be invoked after the grace period
*
* This is transitional.
*/
void call_rcu_sched(struct rcu_head *head, rcu_callback_t func)
{
call_rcu(head, func);
}
EXPORT_SYMBOL_GPL(call_rcu_sched);
/*
* Queue an RCU callback for lazy invocation after a grace period.
* This will likely be later named something like "call_rcu_lazy()",
@ -2976,17 +2963,6 @@ void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
}
EXPORT_SYMBOL_GPL(kfree_call_rcu);
/**
* synchronize_sched - wait until an rcu-sched grace period has elapsed.
*
* This is transitional.
*/
void synchronize_sched(void)
{
synchronize_rcu();
}
EXPORT_SYMBOL_GPL(synchronize_sched);
/**
* get_state_synchronize_rcu - Snapshot current RCU state
*
@ -3028,29 +3004,6 @@ void cond_synchronize_rcu(unsigned long oldstate)
}
EXPORT_SYMBOL_GPL(cond_synchronize_rcu);
/**
* get_state_synchronize_sched - Snapshot current RCU-sched state
*
* This is transitional, and only used by rcutorture.
*/
unsigned long get_state_synchronize_sched(void)
{
return get_state_synchronize_rcu();
}
EXPORT_SYMBOL_GPL(get_state_synchronize_sched);
/**
* cond_synchronize_sched - Conditionally wait for an RCU-sched grace period
* @oldstate: return value from earlier call to get_state_synchronize_sched()
*
* This is transitional and only used by rcutorture.
*/
void cond_synchronize_sched(unsigned long oldstate)
{
cond_synchronize_rcu(oldstate);
}
EXPORT_SYMBOL_GPL(cond_synchronize_sched);
/*
* Check to see if there is any immediate RCU-related work to be done by
* the current CPU, for the specified type of RCU, returning 1 if so and
@ -3266,17 +3219,6 @@ void rcu_barrier(void)
}
EXPORT_SYMBOL_GPL(rcu_barrier);
/**
* rcu_barrier_sched - Wait for in-flight call_rcu_sched() callbacks.
*
* This is transitional.
*/
void rcu_barrier_sched(void)
{
rcu_barrier();
}
EXPORT_SYMBOL_GPL(rcu_barrier_sched);
/*
* Propagate ->qsinitmask bits up the rcu_node tree to account for the
* first CPU in a given leaf rcu_node structure coming online. The caller