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12#ifndef __KERNEL_RTMUTEX_COMMON_H
13#define __KERNEL_RTMUTEX_COMMON_H
14
15#include <linux/rtmutex.h>
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21
22
23#ifdef CONFIG_RT_MUTEX_TESTER
24
25extern void schedule_rt_mutex_test(struct rt_mutex *lock);
26
27#define schedule_rt_mutex(_lock) \
28 do { \
29 if (!(current->flags & PF_MUTEX_TESTER)) \
30 schedule(); \
31 else \
32 schedule_rt_mutex_test(_lock); \
33 } while (0)
34
35#else
36# define schedule_rt_mutex(_lock) schedule()
37#endif
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45
46
47struct rt_mutex_waiter {
48 struct plist_node list_entry;
49 struct plist_node pi_list_entry;
50 struct task_struct *task;
51 struct rt_mutex *lock;
52#ifdef CONFIG_DEBUG_RT_MUTEXES
53 unsigned long ip;
54 struct pid *deadlock_task_pid;
55 struct rt_mutex *deadlock_lock;
56#endif
57};
58
59
60
61
62static inline int rt_mutex_has_waiters(struct rt_mutex *lock)
63{
64 return !plist_head_empty(&lock->wait_list);
65}
66
67static inline struct rt_mutex_waiter *
68rt_mutex_top_waiter(struct rt_mutex *lock)
69{
70 struct rt_mutex_waiter *w;
71
72 w = plist_first_entry(&lock->wait_list, struct rt_mutex_waiter,
73 list_entry);
74 BUG_ON(w->lock != lock);
75
76 return w;
77}
78
79static inline int task_has_pi_waiters(struct task_struct *p)
80{
81 return !plist_head_empty(&p->pi_waiters);
82}
83
84static inline struct rt_mutex_waiter *
85task_top_pi_waiter(struct task_struct *p)
86{
87 return plist_first_entry(&p->pi_waiters, struct rt_mutex_waiter,
88 pi_list_entry);
89}
90
91
92
93
94#define RT_MUTEX_HAS_WAITERS 1UL
95#define RT_MUTEX_OWNER_MASKALL 1UL
96
97static inline struct task_struct *rt_mutex_owner(struct rt_mutex *lock)
98{
99 return (struct task_struct *)
100 ((unsigned long)lock->owner & ~RT_MUTEX_OWNER_MASKALL);
101}
102
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105
106extern struct task_struct *rt_mutex_next_owner(struct rt_mutex *lock);
107extern void rt_mutex_init_proxy_locked(struct rt_mutex *lock,
108 struct task_struct *proxy_owner);
109extern void rt_mutex_proxy_unlock(struct rt_mutex *lock,
110 struct task_struct *proxy_owner);
111extern int rt_mutex_start_proxy_lock(struct rt_mutex *lock,
112 struct rt_mutex_waiter *waiter,
113 struct task_struct *task,
114 int detect_deadlock);
115extern int rt_mutex_finish_proxy_lock(struct rt_mutex *lock,
116 struct hrtimer_sleeper *to,
117 struct rt_mutex_waiter *waiter,
118 int detect_deadlock);
119
120#ifdef CONFIG_DEBUG_RT_MUTEXES
121# include "rtmutex-debug.h"
122#else
123# include "rtmutex.h"
124#endif
125
126#endif
127