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