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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Read-Copy Update notifiers, initially RCU CPU stall notifier.
* Separate from rcupdate.h to avoid #include loops.
*
* Copyright (C) 2023 Paul E. McKenney.
*/
#ifndef __LINUX_RCU_NOTIFIER_H
#define __LINUX_RCU_NOTIFIER_H
// Actions for RCU CPU stall notifier calls.
#define RCU_STALL_NOTIFY_NORM 1
#define RCU_STALL_NOTIFY_EXP 2
#if defined(CONFIG_RCU_STALL_COMMON) && defined(CONFIG_RCU_CPU_STALL_NOTIFIER)
#include <linux/notifier.h>
#include <linux/types.h>
int rcu_stall_chain_notifier_register(struct notifier_block *n);
int rcu_stall_chain_notifier_unregister(struct notifier_block *n);
#else // #if defined(CONFIG_RCU_STALL_COMMON) && defined(CONFIG_RCU_CPU_STALL_NOTIFIER)
// No RCU CPU stall warnings in Tiny RCU.
static inline int rcu_stall_chain_notifier_register(struct notifier_block *n) { return -EEXIST; }
static inline int rcu_stall_chain_notifier_unregister(struct notifier_block *n) { return -ENOENT; }
#endif // #else // #if defined(CONFIG_RCU_STALL_COMMON) && defined(CONFIG_RCU_CPU_STALL_NOTIFIER)
#endif /* __LINUX_RCU_NOTIFIER_H */
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