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1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
---|---|
2 | /* |
3 | * Read-Copy Update notifiers, initially RCU CPU stall notifier. |
4 | * Separate from rcupdate.h to avoid #include loops. |
5 | * |
6 | * Copyright (C) 2023 Paul E. McKenney. |
7 | */ |
8 | |
9 | #ifndef __LINUX_RCU_NOTIFIER_H |
10 | #define __LINUX_RCU_NOTIFIER_H |
11 | |
12 | // Actions for RCU CPU stall notifier calls. |
13 | #define RCU_STALL_NOTIFY_NORM 1 |
14 | #define RCU_STALL_NOTIFY_EXP 2 |
15 | |
16 | #if defined(CONFIG_RCU_STALL_COMMON) && defined(CONFIG_RCU_CPU_STALL_NOTIFIER) |
17 | |
18 | #include <linux/notifier.h> |
19 | #include <linux/types.h> |
20 | |
21 | int rcu_stall_chain_notifier_register(struct notifier_block *n); |
22 | int rcu_stall_chain_notifier_unregister(struct notifier_block *n); |
23 | |
24 | #else // #if defined(CONFIG_RCU_STALL_COMMON) && defined(CONFIG_RCU_CPU_STALL_NOTIFIER) |
25 | |
26 | // No RCU CPU stall warnings in Tiny RCU. |
27 | static inline int rcu_stall_chain_notifier_register(struct notifier_block *n) { return -EEXIST; } |
28 | static inline int rcu_stall_chain_notifier_unregister(struct notifier_block *n) { return -ENOENT; } |
29 | |
30 | #endif // #else // #if defined(CONFIG_RCU_STALL_COMMON) && defined(CONFIG_RCU_CPU_STALL_NOTIFIER) |
31 | |
32 | #endif /* __LINUX_RCU_NOTIFIER_H */ |
33 |
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