1 #ifndef __LINUX_SPINLOCK_API_SMP_H 1 #ifndef __LINUX_SPINLOCK_API_SMP_H
2 #define __LINUX_SPINLOCK_API_SMP_H 2 #define __LINUX_SPINLOCK_API_SMP_H
3 3
4 #ifndef __LINUX_INSIDE_SPINLOCK_H 4 #ifndef __LINUX_INSIDE_SPINLOCK_H
5 # error "please don't include this file direct 5 # error "please don't include this file directly"
6 #endif 6 #endif
7 7
8 /* 8 /*
9 * include/linux/spinlock_api_smp.h 9 * include/linux/spinlock_api_smp.h
10 * 10 *
11 * spinlock API declarations on SMP (and debug 11 * spinlock API declarations on SMP (and debug)
12 * (implemented in kernel/spinlock.c) 12 * (implemented in kernel/spinlock.c)
13 * 13 *
14 * portions Copyright 2005, Red Hat, Inc., Ing 14 * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
15 * Released under the General Public License ( 15 * Released under the General Public License (GPL).
16 */ 16 */
17 17
18 int in_lock_functions(unsigned long addr); 18 int in_lock_functions(unsigned long addr);
19 19
20 #define assert_raw_spin_locked(x) BUG_ON 20 #define assert_raw_spin_locked(x) BUG_ON(!raw_spin_is_locked(x))
21 21
22 void __lockfunc _raw_spin_lock(raw_spinlock_t 22 void __lockfunc _raw_spin_lock(raw_spinlock_t *lock) __acquires(lock);
23 void __lockfunc _raw_spin_lock_nested(raw_spin 23 void __lockfunc _raw_spin_lock_nested(raw_spinlock_t *lock, int subclass)
24 24 __acquires(lock);
25 void __lockfunc 25 void __lockfunc
26 _raw_spin_lock_nest_lock(raw_spinlock_t *lock, 26 _raw_spin_lock_nest_lock(raw_spinlock_t *lock, struct lockdep_map *map)
27 27 __acquires(lock);
28 void __lockfunc _raw_spin_lock_bh(raw_spinlock 28 void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock) __acquires(lock);
29 void __lockfunc _raw_spin_lock_irq(raw_spinloc 29 void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock)
30 30 __acquires(lock);
31 31
32 unsigned long __lockfunc _raw_spin_lock_irqsav 32 unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock)
33 33 __acquires(lock);
34 unsigned long __lockfunc 34 unsigned long __lockfunc
35 _raw_spin_lock_irqsave_nested(raw_spinlock_t * 35 _raw_spin_lock_irqsave_nested(raw_spinlock_t *lock, int subclass)
36 36 __acquires(lock);
37 int __lockfunc _raw_spin_trylock(raw_spinlock_ 37 int __lockfunc _raw_spin_trylock(raw_spinlock_t *lock);
38 int __lockfunc _raw_spin_trylock_bh(raw_spinlo 38 int __lockfunc _raw_spin_trylock_bh(raw_spinlock_t *lock);
39 void __lockfunc _raw_spin_unlock(raw_spinlock_ 39 void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock) __releases(lock);
40 void __lockfunc _raw_spin_unlock_bh(raw_spinlo 40 void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock) __releases(lock);
41 void __lockfunc _raw_spin_unlock_irq(raw_spinl 41 void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock) __releases(lock);
42 void __lockfunc 42 void __lockfunc
43 _raw_spin_unlock_irqrestore(raw_spinlock_t *lo 43 _raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags)
44 44 __releases(lock);
45 45
46 #ifdef CONFIG_INLINE_SPIN_LOCK 46 #ifdef CONFIG_INLINE_SPIN_LOCK
47 #define _raw_spin_lock(lock) __raw_spin_lock(l 47 #define _raw_spin_lock(lock) __raw_spin_lock(lock)
48 #endif 48 #endif
49 49
50 #ifdef CONFIG_INLINE_SPIN_LOCK_BH 50 #ifdef CONFIG_INLINE_SPIN_LOCK_BH
51 #define _raw_spin_lock_bh(lock) __raw_spin_loc 51 #define _raw_spin_lock_bh(lock) __raw_spin_lock_bh(lock)
52 #endif 52 #endif
53 53
54 #ifdef CONFIG_INLINE_SPIN_LOCK_IRQ 54 #ifdef CONFIG_INLINE_SPIN_LOCK_IRQ
55 #define _raw_spin_lock_irq(lock) __raw_spin_lo 55 #define _raw_spin_lock_irq(lock) __raw_spin_lock_irq(lock)
56 #endif 56 #endif
57 57
58 #ifdef CONFIG_INLINE_SPIN_LOCK_IRQSAVE 58 #ifdef CONFIG_INLINE_SPIN_LOCK_IRQSAVE
59 #define _raw_spin_lock_irqsave(lock) __raw_spi 59 #define _raw_spin_lock_irqsave(lock) __raw_spin_lock_irqsave(lock)
60 #endif 60 #endif
61 61
62 #ifdef CONFIG_INLINE_SPIN_TRYLOCK 62 #ifdef CONFIG_INLINE_SPIN_TRYLOCK
63 #define _raw_spin_trylock(lock) __raw_spin_try 63 #define _raw_spin_trylock(lock) __raw_spin_trylock(lock)
64 #endif 64 #endif
65 65
66 #ifdef CONFIG_INLINE_SPIN_TRYLOCK_BH 66 #ifdef CONFIG_INLINE_SPIN_TRYLOCK_BH
67 #define _raw_spin_trylock_bh(lock) __raw_spin_ 67 #define _raw_spin_trylock_bh(lock) __raw_spin_trylock_bh(lock)
68 #endif 68 #endif
69 69
70 #ifndef CONFIG_UNINLINE_SPIN_UNLOCK 70 #ifndef CONFIG_UNINLINE_SPIN_UNLOCK
71 #define _raw_spin_unlock(lock) __raw_spin_unlo 71 #define _raw_spin_unlock(lock) __raw_spin_unlock(lock)
72 #endif 72 #endif
73 73
74 #ifdef CONFIG_INLINE_SPIN_UNLOCK_BH 74 #ifdef CONFIG_INLINE_SPIN_UNLOCK_BH
75 #define _raw_spin_unlock_bh(lock) __raw_spin_u 75 #define _raw_spin_unlock_bh(lock) __raw_spin_unlock_bh(lock)
76 #endif 76 #endif
77 77
78 #ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQ 78 #ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQ
79 #define _raw_spin_unlock_irq(lock) __raw_spin_ 79 #define _raw_spin_unlock_irq(lock) __raw_spin_unlock_irq(lock)
80 #endif 80 #endif
81 81
82 #ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE 82 #ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE
83 #define _raw_spin_unlock_irqrestore(lock, flag 83 #define _raw_spin_unlock_irqrestore(lock, flags) __raw_spin_unlock_irqrestore(lock, flags)
84 #endif 84 #endif
85 85
86 static inline int __raw_spin_trylock(raw_spinl 86 static inline int __raw_spin_trylock(raw_spinlock_t *lock)
87 { 87 {
88 preempt_disable(); 88 preempt_disable();
89 if (do_raw_spin_trylock(lock)) { 89 if (do_raw_spin_trylock(lock)) {
90 spin_acquire(&lock->dep_map, 0 90 spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
91 return 1; 91 return 1;
92 } 92 }
93 preempt_enable(); 93 preempt_enable();
94 return 0; 94 return 0;
95 } 95 }
96 96
97 /* 97 /*
98 * If lockdep is enabled then we use the non-p 98 * If lockdep is enabled then we use the non-preemption spin-ops
99 * even on CONFIG_PREEMPTION, because lockdep 99 * even on CONFIG_PREEMPTION, because lockdep assumes that interrupts are
100 * not re-enabled during lock-acquire (which t 100 * not re-enabled during lock-acquire (which the preempt-spin-ops do):
101 */ 101 */
102 #if !defined(CONFIG_GENERIC_LOCKBREAK) || defi 102 #if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC)
103 103
104 static inline unsigned long __raw_spin_lock_ir 104 static inline unsigned long __raw_spin_lock_irqsave(raw_spinlock_t *lock)
105 { 105 {
106 unsigned long flags; 106 unsigned long flags;
107 107
108 local_irq_save(flags); 108 local_irq_save(flags);
109 preempt_disable(); 109 preempt_disable();
110 spin_acquire(&lock->dep_map, 0, 0, _RE 110 spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
111 LOCK_CONTENDED(lock, do_raw_spin_trylo 111 LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
112 return flags; 112 return flags;
113 } 113 }
114 114
115 static inline void __raw_spin_lock_irq(raw_spi 115 static inline void __raw_spin_lock_irq(raw_spinlock_t *lock)
116 { 116 {
117 local_irq_disable(); 117 local_irq_disable();
118 preempt_disable(); 118 preempt_disable();
119 spin_acquire(&lock->dep_map, 0, 0, _RE 119 spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
120 LOCK_CONTENDED(lock, do_raw_spin_trylo 120 LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
121 } 121 }
122 122
123 static inline void __raw_spin_lock_bh(raw_spin 123 static inline void __raw_spin_lock_bh(raw_spinlock_t *lock)
124 { 124 {
125 __local_bh_disable_ip(_RET_IP_, SOFTIR 125 __local_bh_disable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
126 spin_acquire(&lock->dep_map, 0, 0, _RE 126 spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
127 LOCK_CONTENDED(lock, do_raw_spin_trylo 127 LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
128 } 128 }
129 129
130 static inline void __raw_spin_lock(raw_spinloc 130 static inline void __raw_spin_lock(raw_spinlock_t *lock)
131 { 131 {
132 preempt_disable(); 132 preempt_disable();
133 spin_acquire(&lock->dep_map, 0, 0, _RE 133 spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
134 LOCK_CONTENDED(lock, do_raw_spin_trylo 134 LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
135 } 135 }
136 136
137 #endif /* !CONFIG_GENERIC_LOCKBREAK || CONFIG_ 137 #endif /* !CONFIG_GENERIC_LOCKBREAK || CONFIG_DEBUG_LOCK_ALLOC */
138 138
139 static inline void __raw_spin_unlock(raw_spinl 139 static inline void __raw_spin_unlock(raw_spinlock_t *lock)
140 { 140 {
141 spin_release(&lock->dep_map, _RET_IP_) 141 spin_release(&lock->dep_map, _RET_IP_);
142 do_raw_spin_unlock(lock); 142 do_raw_spin_unlock(lock);
143 preempt_enable(); 143 preempt_enable();
144 } 144 }
145 145
146 static inline void __raw_spin_unlock_irqrestor 146 static inline void __raw_spin_unlock_irqrestore(raw_spinlock_t *lock,
147 un 147 unsigned long flags)
148 { 148 {
149 spin_release(&lock->dep_map, _RET_IP_) 149 spin_release(&lock->dep_map, _RET_IP_);
150 do_raw_spin_unlock(lock); 150 do_raw_spin_unlock(lock);
151 local_irq_restore(flags); 151 local_irq_restore(flags);
152 preempt_enable(); 152 preempt_enable();
153 } 153 }
154 154
155 static inline void __raw_spin_unlock_irq(raw_s 155 static inline void __raw_spin_unlock_irq(raw_spinlock_t *lock)
156 { 156 {
157 spin_release(&lock->dep_map, _RET_IP_) 157 spin_release(&lock->dep_map, _RET_IP_);
158 do_raw_spin_unlock(lock); 158 do_raw_spin_unlock(lock);
159 local_irq_enable(); 159 local_irq_enable();
160 preempt_enable(); 160 preempt_enable();
161 } 161 }
162 162
163 static inline void __raw_spin_unlock_bh(raw_sp 163 static inline void __raw_spin_unlock_bh(raw_spinlock_t *lock)
164 { 164 {
165 spin_release(&lock->dep_map, _RET_IP_) 165 spin_release(&lock->dep_map, _RET_IP_);
166 do_raw_spin_unlock(lock); 166 do_raw_spin_unlock(lock);
167 __local_bh_enable_ip(_RET_IP_, SOFTIRQ 167 __local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
168 } 168 }
169 169
170 static inline int __raw_spin_trylock_bh(raw_sp 170 static inline int __raw_spin_trylock_bh(raw_spinlock_t *lock)
171 { 171 {
172 __local_bh_disable_ip(_RET_IP_, SOFTIR 172 __local_bh_disable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
173 if (do_raw_spin_trylock(lock)) { 173 if (do_raw_spin_trylock(lock)) {
174 spin_acquire(&lock->dep_map, 0 174 spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
175 return 1; 175 return 1;
176 } 176 }
177 __local_bh_enable_ip(_RET_IP_, SOFTIRQ 177 __local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
178 return 0; 178 return 0;
179 } 179 }
180 180
181 /* PREEMPT_RT has its own rwlock implementatio 181 /* PREEMPT_RT has its own rwlock implementation */
182 #ifndef CONFIG_PREEMPT_RT 182 #ifndef CONFIG_PREEMPT_RT
183 #include <linux/rwlock_api_smp.h> 183 #include <linux/rwlock_api_smp.h>
184 #endif 184 #endif
185 185
186 #endif /* __LINUX_SPINLOCK_API_SMP_H */ 186 #endif /* __LINUX_SPINLOCK_API_SMP_H */
187 187
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