45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Mutexes: blocking mutual exclusion locks
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*
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* started by Ingo Molnar:
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*
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* Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
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*/
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/*
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* This is the control structure for tasks blocked on mutex, which resides
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* on the blocked task's kernel stack:
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*/
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struct mutex_waiter {
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struct list_head list;
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struct task_struct *task;
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struct ww_acquire_ctx *ww_ctx;
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#ifdef CONFIG_DEBUG_MUTEXES
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void *magic;
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#endif
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};
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#ifdef CONFIG_DEBUG_MUTEXES
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extern void debug_mutex_lock_common(struct mutex *lock,
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struct mutex_waiter *waiter);
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extern void debug_mutex_wake_waiter(struct mutex *lock,
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struct mutex_waiter *waiter);
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extern void debug_mutex_free_waiter(struct mutex_waiter *waiter);
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extern void debug_mutex_add_waiter(struct mutex *lock,
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struct mutex_waiter *waiter,
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struct task_struct *task);
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extern void debug_mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
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struct task_struct *task);
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extern void debug_mutex_unlock(struct mutex *lock);
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extern void debug_mutex_init(struct mutex *lock, const char *name,
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struct lock_class_key *key);
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#else /* CONFIG_DEBUG_MUTEXES */
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# define debug_mutex_lock_common(lock, waiter) do { } while (0)
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# define debug_mutex_wake_waiter(lock, waiter) do { } while (0)
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# define debug_mutex_free_waiter(waiter) do { } while (0)
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# define debug_mutex_add_waiter(lock, waiter, ti) do { } while (0)
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# define debug_mutex_remove_waiter(lock, waiter, ti) do { } while (0)
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# define debug_mutex_unlock(lock) do { } while (0)
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# define debug_mutex_init(lock, name, key) do { } while (0)
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#endif /* !CONFIG_DEBUG_MUTEXES */
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