52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_SCHED_RCUPDATE_WAIT_H
|
|
#define _LINUX_SCHED_RCUPDATE_WAIT_H
|
|
|
|
/*
|
|
* RCU synchronization types and methods:
|
|
*/
|
|
|
|
#include <linux/rcupdate.h>
|
|
#include <linux/completion.h>
|
|
|
|
/*
|
|
* Structure allowing asynchronous waiting on RCU.
|
|
*/
|
|
struct rcu_synchronize {
|
|
struct rcu_head head;
|
|
struct completion completion;
|
|
};
|
|
void wakeme_after_rcu(struct rcu_head *head);
|
|
|
|
void __wait_rcu_gp(bool checktiny, int n, call_rcu_func_t *crcu_array,
|
|
struct rcu_synchronize *rs_array);
|
|
|
|
#define _wait_rcu_gp(checktiny, ...) \
|
|
do { \
|
|
call_rcu_func_t __crcu_array[] = { __VA_ARGS__ }; \
|
|
struct rcu_synchronize __rs_array[ARRAY_SIZE(__crcu_array)]; \
|
|
__wait_rcu_gp(checktiny, ARRAY_SIZE(__crcu_array), \
|
|
__crcu_array, __rs_array); \
|
|
} while (0)
|
|
|
|
#define wait_rcu_gp(...) _wait_rcu_gp(false, __VA_ARGS__)
|
|
|
|
/**
|
|
* synchronize_rcu_mult - Wait concurrently for multiple grace periods
|
|
* @...: List of call_rcu() functions for different grace periods to wait on
|
|
*
|
|
* This macro waits concurrently for multiple types of RCU grace periods.
|
|
* For example, synchronize_rcu_mult(call_rcu, call_rcu_tasks) would wait
|
|
* on concurrent RCU and RCU-tasks grace periods. Waiting on a give SRCU
|
|
* domain requires you to write a wrapper function for that SRCU domain's
|
|
* call_srcu() function, supplying the corresponding srcu_struct.
|
|
*
|
|
* If Tiny RCU, tell _wait_rcu_gp() does not bother waiting for RCU,
|
|
* given that anywhere synchronize_rcu_mult() can be called is automatically
|
|
* a grace period.
|
|
*/
|
|
#define synchronize_rcu_mult(...) \
|
|
_wait_rcu_gp(IS_ENABLED(CONFIG_TINY_RCU), __VA_ARGS__)
|
|
|
|
#endif /* _LINUX_SCHED_RCUPDATE_WAIT_H */
|