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fb1c8f93 IM |
1 | #ifndef __LINUX_SPINLOCK_API_SMP_H |
2 | #define __LINUX_SPINLOCK_API_SMP_H | |
3 | ||
4 | #ifndef __LINUX_SPINLOCK_H | |
5 | # error "please don't include this file directly" | |
6 | #endif | |
7 | ||
8 | /* | |
9 | * include/linux/spinlock_api_smp.h | |
10 | * | |
11 | * spinlock API declarations on SMP (and debug) | |
12 | * (implemented in kernel/spinlock.c) | |
13 | * | |
14 | * portions Copyright 2005, Red Hat, Inc., Ingo Molnar | |
15 | * Released under the General Public License (GPL). | |
16 | */ | |
17 | ||
18 | int in_lock_functions(unsigned long addr); | |
19 | ||
c2f21ce2 | 20 | #define assert_raw_spin_locked(x) BUG_ON(!raw_spin_is_locked(x)) |
fb1c8f93 | 21 | |
9c1721aa TG |
22 | void __lockfunc _raw_spin_lock(raw_spinlock_t *lock) __acquires(lock); |
23 | void __lockfunc _raw_spin_lock_nested(raw_spinlock_t *lock, int subclass) | |
24 | __acquires(lock); | |
113948d8 TG |
25 | void __lockfunc _raw_spin_lock_bh_nested(raw_spinlock_t *lock, int subclass) |
26 | __acquires(lock); | |
c2f21ce2 | 27 | void __lockfunc |
9c1721aa TG |
28 | _raw_spin_lock_nest_lock(raw_spinlock_t *lock, struct lockdep_map *map) |
29 | __acquires(lock); | |
30 | void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock) __acquires(lock); | |
31 | void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock) | |
32 | __acquires(lock); | |
33 | ||
34 | unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock) | |
35 | __acquires(lock); | |
c2f21ce2 | 36 | unsigned long __lockfunc |
9c1721aa TG |
37 | _raw_spin_lock_irqsave_nested(raw_spinlock_t *lock, int subclass) |
38 | __acquires(lock); | |
39 | int __lockfunc _raw_spin_trylock(raw_spinlock_t *lock); | |
40 | int __lockfunc _raw_spin_trylock_bh(raw_spinlock_t *lock); | |
41 | void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock) __releases(lock); | |
42 | void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock) __releases(lock); | |
43 | void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock) __releases(lock); | |
c2f21ce2 | 44 | void __lockfunc |
9c1721aa TG |
45 | _raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags) |
46 | __releases(lock); | |
fb1c8f93 | 47 | |
6beb0009 | 48 | #ifdef CONFIG_INLINE_SPIN_LOCK |
9c1721aa | 49 | #define _raw_spin_lock(lock) __raw_spin_lock(lock) |
892a7c67 HC |
50 | #endif |
51 | ||
6beb0009 | 52 | #ifdef CONFIG_INLINE_SPIN_LOCK_BH |
9c1721aa | 53 | #define _raw_spin_lock_bh(lock) __raw_spin_lock_bh(lock) |
892a7c67 HC |
54 | #endif |
55 | ||
6beb0009 | 56 | #ifdef CONFIG_INLINE_SPIN_LOCK_IRQ |
9c1721aa | 57 | #define _raw_spin_lock_irq(lock) __raw_spin_lock_irq(lock) |
892a7c67 HC |
58 | #endif |
59 | ||
6beb0009 | 60 | #ifdef CONFIG_INLINE_SPIN_LOCK_IRQSAVE |
9c1721aa | 61 | #define _raw_spin_lock_irqsave(lock) __raw_spin_lock_irqsave(lock) |
892a7c67 HC |
62 | #endif |
63 | ||
6beb0009 | 64 | #ifdef CONFIG_INLINE_SPIN_TRYLOCK |
9c1721aa | 65 | #define _raw_spin_trylock(lock) __raw_spin_trylock(lock) |
892a7c67 HC |
66 | #endif |
67 | ||
6beb0009 | 68 | #ifdef CONFIG_INLINE_SPIN_TRYLOCK_BH |
9c1721aa | 69 | #define _raw_spin_trylock_bh(lock) __raw_spin_trylock_bh(lock) |
892a7c67 HC |
70 | #endif |
71 | ||
e335e3eb | 72 | #ifndef CONFIG_UNINLINE_SPIN_UNLOCK |
9c1721aa | 73 | #define _raw_spin_unlock(lock) __raw_spin_unlock(lock) |
892a7c67 HC |
74 | #endif |
75 | ||
6beb0009 | 76 | #ifdef CONFIG_INLINE_SPIN_UNLOCK_BH |
9c1721aa | 77 | #define _raw_spin_unlock_bh(lock) __raw_spin_unlock_bh(lock) |
892a7c67 HC |
78 | #endif |
79 | ||
6beb0009 | 80 | #ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQ |
9c1721aa | 81 | #define _raw_spin_unlock_irq(lock) __raw_spin_unlock_irq(lock) |
892a7c67 HC |
82 | #endif |
83 | ||
6beb0009 | 84 | #ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE |
9c1721aa | 85 | #define _raw_spin_unlock_irqrestore(lock, flags) __raw_spin_unlock_irqrestore(lock, flags) |
892a7c67 HC |
86 | #endif |
87 | ||
9c1721aa | 88 | static inline int __raw_spin_trylock(raw_spinlock_t *lock) |
69d0ee73 HC |
89 | { |
90 | preempt_disable(); | |
9828ea9d | 91 | if (do_raw_spin_trylock(lock)) { |
69d0ee73 HC |
92 | spin_acquire(&lock->dep_map, 0, 1, _RET_IP_); |
93 | return 1; | |
94 | } | |
95 | preempt_enable(); | |
96 | return 0; | |
97 | } | |
98 | ||
69d0ee73 HC |
99 | /* |
100 | * If lockdep is enabled then we use the non-preemption spin-ops | |
101 | * even on CONFIG_PREEMPT, because lockdep assumes that interrupts are | |
102 | * not re-enabled during lock-acquire (which the preempt-spin-ops do): | |
103 | */ | |
104 | #if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC) | |
105 | ||
9c1721aa | 106 | static inline unsigned long __raw_spin_lock_irqsave(raw_spinlock_t *lock) |
69d0ee73 HC |
107 | { |
108 | unsigned long flags; | |
109 | ||
110 | local_irq_save(flags); | |
111 | preempt_disable(); | |
112 | spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
113 | /* | |
114 | * On lockdep we dont want the hand-coded irq-enable of | |
9828ea9d | 115 | * do_raw_spin_lock_flags() code, because lockdep assumes |
69d0ee73 HC |
116 | * that interrupts are not re-enabled during lock-acquire: |
117 | */ | |
118 | #ifdef CONFIG_LOCKDEP | |
9828ea9d | 119 | LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock); |
69d0ee73 | 120 | #else |
9828ea9d | 121 | do_raw_spin_lock_flags(lock, &flags); |
69d0ee73 HC |
122 | #endif |
123 | return flags; | |
124 | } | |
125 | ||
9c1721aa | 126 | static inline void __raw_spin_lock_irq(raw_spinlock_t *lock) |
69d0ee73 HC |
127 | { |
128 | local_irq_disable(); | |
129 | preempt_disable(); | |
130 | spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
9828ea9d | 131 | LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock); |
69d0ee73 HC |
132 | } |
133 | ||
9c1721aa | 134 | static inline void __raw_spin_lock_bh(raw_spinlock_t *lock) |
69d0ee73 | 135 | { |
9ea4c380 | 136 | __local_bh_disable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); |
69d0ee73 | 137 | spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); |
9828ea9d | 138 | LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock); |
69d0ee73 HC |
139 | } |
140 | ||
9c1721aa | 141 | static inline void __raw_spin_lock(raw_spinlock_t *lock) |
69d0ee73 HC |
142 | { |
143 | preempt_disable(); | |
144 | spin_acquire(&lock->dep_map, 0, 0, _RET_IP_); | |
9828ea9d | 145 | LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock); |
69d0ee73 HC |
146 | } |
147 | ||
ae58403f | 148 | #endif /* !CONFIG_GENERIC_LOCKBREAK || CONFIG_DEBUG_LOCK_ALLOC */ |
69d0ee73 | 149 | |
9c1721aa | 150 | static inline void __raw_spin_unlock(raw_spinlock_t *lock) |
69d0ee73 HC |
151 | { |
152 | spin_release(&lock->dep_map, 1, _RET_IP_); | |
9828ea9d | 153 | do_raw_spin_unlock(lock); |
69d0ee73 HC |
154 | preempt_enable(); |
155 | } | |
156 | ||
9c1721aa | 157 | static inline void __raw_spin_unlock_irqrestore(raw_spinlock_t *lock, |
69d0ee73 HC |
158 | unsigned long flags) |
159 | { | |
160 | spin_release(&lock->dep_map, 1, _RET_IP_); | |
9828ea9d | 161 | do_raw_spin_unlock(lock); |
69d0ee73 HC |
162 | local_irq_restore(flags); |
163 | preempt_enable(); | |
164 | } | |
165 | ||
9c1721aa | 166 | static inline void __raw_spin_unlock_irq(raw_spinlock_t *lock) |
69d0ee73 HC |
167 | { |
168 | spin_release(&lock->dep_map, 1, _RET_IP_); | |
9828ea9d | 169 | do_raw_spin_unlock(lock); |
69d0ee73 HC |
170 | local_irq_enable(); |
171 | preempt_enable(); | |
172 | } | |
173 | ||
9c1721aa | 174 | static inline void __raw_spin_unlock_bh(raw_spinlock_t *lock) |
69d0ee73 HC |
175 | { |
176 | spin_release(&lock->dep_map, 1, _RET_IP_); | |
9828ea9d | 177 | do_raw_spin_unlock(lock); |
9ea4c380 | 178 | __local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); |
69d0ee73 HC |
179 | } |
180 | ||
9c1721aa | 181 | static inline int __raw_spin_trylock_bh(raw_spinlock_t *lock) |
69d0ee73 | 182 | { |
9ea4c380 | 183 | __local_bh_disable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); |
9828ea9d | 184 | if (do_raw_spin_trylock(lock)) { |
69d0ee73 HC |
185 | spin_acquire(&lock->dep_map, 0, 1, _RET_IP_); |
186 | return 1; | |
187 | } | |
9ea4c380 | 188 | __local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET); |
69d0ee73 HC |
189 | return 0; |
190 | } | |
191 | ||
6b6b4792 TG |
192 | #include <linux/rwlock_api_smp.h> |
193 | ||
fb1c8f93 | 194 | #endif /* __LINUX_SPINLOCK_API_SMP_H */ |