| /* 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 */ |
