// SPDX-License-Identifier: GPL-2.0
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/*
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* RT-Mutexes: blocking mutual exclusion locks with PI support
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*
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* started by Ingo Molnar and Thomas Gleixner:
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*
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* Copyright (C) 2004-2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
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* Copyright (C) 2006 Timesys Corp., Thomas Gleixner <tglx@timesys.com>
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*
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* This code is based on the rt.c implementation in the preempt-rt tree.
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* Portions of said code are
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*
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* Copyright (C) 2004 LynuxWorks, Inc., Igor Manyilov, Bill Huey
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* Copyright (C) 2006 Esben Nielsen
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* Copyright (C) 2006 Kihon Technologies Inc.,
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* Steven Rostedt <rostedt@goodmis.org>
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*
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* See rt.c in preempt-rt for proper credits and further information
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*/
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#include <linux/sched.h>
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#include <linux/sched/rt.h>
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#include <linux/sched/debug.h>
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#include <linux/delay.h>
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#include <linux/export.h>
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#include <linux/spinlock.h>
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#include <linux/kallsyms.h>
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#include <linux/syscalls.h>
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#include <linux/interrupt.h>
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#include <linux/rbtree.h>
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#include <linux/fs.h>
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#include <linux/debug_locks.h>
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#include "rtmutex_common.h"
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void rt_mutex_debug_task_free(struct task_struct *task)
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{
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DEBUG_LOCKS_WARN_ON(!RB_EMPTY_ROOT(&task->pi_waiters.rb_root));
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DEBUG_LOCKS_WARN_ON(task->pi_blocked_on);
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}
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void debug_rt_mutex_lock(struct rt_mutex *lock)
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{
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}
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void debug_rt_mutex_unlock(struct rt_mutex *lock)
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{
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DEBUG_LOCKS_WARN_ON(rt_mutex_owner(lock) != current);
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}
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void
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debug_rt_mutex_proxy_lock(struct rt_mutex *lock, struct task_struct *powner)
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{
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}
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void debug_rt_mutex_proxy_unlock(struct rt_mutex *lock)
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{
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DEBUG_LOCKS_WARN_ON(!rt_mutex_owner(lock));
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}
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void debug_rt_mutex_init_waiter(struct rt_mutex_waiter *waiter)
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{
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memset(waiter, 0x11, sizeof(*waiter));
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}
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void debug_rt_mutex_free_waiter(struct rt_mutex_waiter *waiter)
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{
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memset(waiter, 0x22, sizeof(*waiter));
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}
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void debug_rt_mutex_init(struct rt_mutex *lock, const char *name, struct lock_class_key *key)
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{
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/*
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* Make sure we are not reinitializing a held lock:
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*/
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debug_check_no_locks_freed((void *)lock, sizeof(*lock));
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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lockdep_init_map(&lock->dep_map, name, key, 0);
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#endif
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}
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