include/linux/rcupdate_wait.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_SCHED_RCUPDATE_WAIT_H
   3 #define _LINUX_SCHED_RCUPDATE_WAIT_H
   4
   5 /*
   6  * RCU synchronization types and methods:
   7  */
   8
   9 #include <linux/rcupdate.h>
  10 #include <linux/completion.h>
  11
  12 /*
  13  * Structure allowing asynchronous waiting on RCU.
  14  */
  15 struct rcu_synchronize {
  16         struct rcu_head head;
  17         struct completion completion;
  18 };
  19 void wakeme_after_rcu(struct rcu_head *head);
  20
  21 void __wait_rcu_gp(bool checktiny, int n, call_rcu_func_t *crcu_array,
  22                    struct rcu_synchronize *rs_array);
  23
  24 #define _wait_rcu_gp(checktiny, ...) \
  25 do {                                                                    \
  26         call_rcu_func_t __crcu_array[] = { __VA_ARGS__ };               \
  27         struct rcu_synchronize __rs_array[ARRAY_SIZE(__crcu_array)];    \
  28         __wait_rcu_gp(checktiny, ARRAY_SIZE(__crcu_array),              \
  29                         __crcu_array, __rs_array);                      \
  30 } while (0)
  31
  32 #define wait_rcu_gp(...) _wait_rcu_gp(false, __VA_ARGS__)
  33
  34 #endif /* _LINUX_SCHED_RCUPDATE_WAIT_H */