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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
6053ee3b IM |
2 | /* |
3 | * Mutexes: blocking mutual exclusion locks | |
4 | * | |
5 | * started by Ingo Molnar: | |
6 | * | |
7 | * Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> | |
6053ee3b IM |
8 | */ |
9 | ||
43d2d52d TG |
10 | /* |
11 | * This is the control structure for tasks blocked on mutex, which resides | |
12 | * on the blocked task's kernel stack: | |
13 | */ | |
14 | struct mutex_waiter { | |
15 | struct list_head list; | |
16 | struct task_struct *task; | |
17 | struct ww_acquire_ctx *ww_ctx; | |
18 | #ifdef CONFIG_DEBUG_MUTEXES | |
19 | void *magic; | |
20 | #endif | |
21 | }; | |
22 | ||
a321fb90 TG |
23 | #ifdef CONFIG_DEBUG_MUTEXES |
24 | extern void debug_mutex_lock_common(struct mutex *lock, | |
25 | struct mutex_waiter *waiter); | |
26 | extern void debug_mutex_wake_waiter(struct mutex *lock, | |
27 | struct mutex_waiter *waiter); | |
28 | extern void debug_mutex_free_waiter(struct mutex_waiter *waiter); | |
29 | extern void debug_mutex_add_waiter(struct mutex *lock, | |
30 | struct mutex_waiter *waiter, | |
31 | struct task_struct *task); | |
32 | extern void debug_mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter, | |
33 | struct task_struct *task); | |
34 | extern void debug_mutex_unlock(struct mutex *lock); | |
35 | extern void debug_mutex_init(struct mutex *lock, const char *name, | |
36 | struct lock_class_key *key); | |
37 | #else /* CONFIG_DEBUG_MUTEXES */ | |
38 | # define debug_mutex_lock_common(lock, waiter) do { } while (0) | |
39 | # define debug_mutex_wake_waiter(lock, waiter) do { } while (0) | |
40 | # define debug_mutex_free_waiter(waiter) do { } while (0) | |
41 | # define debug_mutex_add_waiter(lock, waiter, ti) do { } while (0) | |
42 | # define debug_mutex_remove_waiter(lock, waiter, ti) do { } while (0) | |
43 | # define debug_mutex_unlock(lock) do { } while (0) | |
44 | # define debug_mutex_init(lock, name, key) do { } while (0) | |
45 | #endif /* !CONFIG_DEBUG_MUTEXES */ |