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342a9324 TG |
1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | #ifndef __LINUX_SPINLOCK_RT_H | |
3 | #define __LINUX_SPINLOCK_RT_H | |
4 | ||
2747b93e | 5 | #ifndef __LINUX_INSIDE_SPINLOCK_H |
342a9324 TG |
6 | #error Do not include directly. Use spinlock.h |
7 | #endif | |
8 | ||
9 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
10 | extern void __rt_spin_lock_init(spinlock_t *lock, const char *name, | |
31552385 | 11 | struct lock_class_key *key, bool percpu); |
342a9324 TG |
12 | #else |
13 | static inline void __rt_spin_lock_init(spinlock_t *lock, const char *name, | |
31552385 | 14 | struct lock_class_key *key, bool percpu) |
342a9324 TG |
15 | { |
16 | } | |
17 | #endif | |
18 | ||
31552385 TG |
19 | #define spin_lock_init(slock) \ |
20 | do { \ | |
21 | static struct lock_class_key __key; \ | |
22 | \ | |
23 | rt_mutex_base_init(&(slock)->lock); \ | |
24 | __rt_spin_lock_init(slock, #slock, &__key, false); \ | |
25 | } while (0) | |
26 | ||
27 | #define local_spin_lock_init(slock) \ | |
28 | do { \ | |
29 | static struct lock_class_key __key; \ | |
30 | \ | |
31 | rt_mutex_base_init(&(slock)->lock); \ | |
32 | __rt_spin_lock_init(slock, #slock, &__key, true); \ | |
342a9324 TG |
33 | } while (0) |
34 | ||
35 | extern void rt_spin_lock(spinlock_t *lock); | |
36 | extern void rt_spin_lock_nested(spinlock_t *lock, int subclass); | |
37 | extern void rt_spin_lock_nest_lock(spinlock_t *lock, struct lockdep_map *nest_lock); | |
38 | extern void rt_spin_unlock(spinlock_t *lock); | |
39 | extern void rt_spin_lock_unlock(spinlock_t *lock); | |
40 | extern int rt_spin_trylock_bh(spinlock_t *lock); | |
41 | extern int rt_spin_trylock(spinlock_t *lock); | |
42 | ||
43 | static __always_inline void spin_lock(spinlock_t *lock) | |
44 | { | |
45 | rt_spin_lock(lock); | |
46 | } | |
47 | ||
48 | #ifdef CONFIG_LOCKDEP | |
49 | # define __spin_lock_nested(lock, subclass) \ | |
50 | rt_spin_lock_nested(lock, subclass) | |
51 | ||
52 | # define __spin_lock_nest_lock(lock, nest_lock) \ | |
53 | do { \ | |
54 | typecheck(struct lockdep_map *, &(nest_lock)->dep_map); \ | |
55 | rt_spin_lock_nest_lock(lock, &(nest_lock)->dep_map); \ | |
56 | } while (0) | |
57 | # define __spin_lock_irqsave_nested(lock, flags, subclass) \ | |
58 | do { \ | |
59 | typecheck(unsigned long, flags); \ | |
60 | flags = 0; \ | |
61 | __spin_lock_nested(lock, subclass); \ | |
62 | } while (0) | |
63 | ||
64 | #else | |
65 | /* | |
66 | * Always evaluate the 'subclass' argument to avoid that the compiler | |
67 | * warns about set-but-not-used variables when building with | |
68 | * CONFIG_DEBUG_LOCK_ALLOC=n and with W=1. | |
69 | */ | |
70 | # define __spin_lock_nested(lock, subclass) spin_lock(((void)(subclass), (lock))) | |
71 | # define __spin_lock_nest_lock(lock, subclass) spin_lock(((void)(subclass), (lock))) | |
72 | # define __spin_lock_irqsave_nested(lock, flags, subclass) \ | |
73 | spin_lock_irqsave(((void)(subclass), (lock)), flags) | |
74 | #endif | |
75 | ||
76 | #define spin_lock_nested(lock, subclass) \ | |
77 | __spin_lock_nested(lock, subclass) | |
78 | ||
79 | #define spin_lock_nest_lock(lock, nest_lock) \ | |
80 | __spin_lock_nest_lock(lock, nest_lock) | |
81 | ||
82 | #define spin_lock_irqsave_nested(lock, flags, subclass) \ | |
83 | __spin_lock_irqsave_nested(lock, flags, subclass) | |
84 | ||
85 | static __always_inline void spin_lock_bh(spinlock_t *lock) | |
86 | { | |
87 | /* Investigate: Drop bh when blocking ? */ | |
88 | local_bh_disable(); | |
89 | rt_spin_lock(lock); | |
90 | } | |
91 | ||
92 | static __always_inline void spin_lock_irq(spinlock_t *lock) | |
93 | { | |
94 | rt_spin_lock(lock); | |
95 | } | |
96 | ||
97 | #define spin_lock_irqsave(lock, flags) \ | |
98 | do { \ | |
99 | typecheck(unsigned long, flags); \ | |
100 | flags = 0; \ | |
101 | spin_lock(lock); \ | |
102 | } while (0) | |
103 | ||
104 | static __always_inline void spin_unlock(spinlock_t *lock) | |
105 | { | |
106 | rt_spin_unlock(lock); | |
107 | } | |
108 | ||
109 | static __always_inline void spin_unlock_bh(spinlock_t *lock) | |
110 | { | |
111 | rt_spin_unlock(lock); | |
112 | local_bh_enable(); | |
113 | } | |
114 | ||
115 | static __always_inline void spin_unlock_irq(spinlock_t *lock) | |
116 | { | |
117 | rt_spin_unlock(lock); | |
118 | } | |
119 | ||
120 | static __always_inline void spin_unlock_irqrestore(spinlock_t *lock, | |
121 | unsigned long flags) | |
122 | { | |
123 | rt_spin_unlock(lock); | |
124 | } | |
125 | ||
126 | #define spin_trylock(lock) \ | |
127 | __cond_lock(lock, rt_spin_trylock(lock)) | |
128 | ||
129 | #define spin_trylock_bh(lock) \ | |
130 | __cond_lock(lock, rt_spin_trylock_bh(lock)) | |
131 | ||
132 | #define spin_trylock_irq(lock) \ | |
133 | __cond_lock(lock, rt_spin_trylock(lock)) | |
134 | ||
135 | #define __spin_trylock_irqsave(lock, flags) \ | |
136 | ({ \ | |
137 | int __locked; \ | |
138 | \ | |
139 | typecheck(unsigned long, flags); \ | |
140 | flags = 0; \ | |
141 | __locked = spin_trylock(lock); \ | |
142 | __locked; \ | |
143 | }) | |
144 | ||
145 | #define spin_trylock_irqsave(lock, flags) \ | |
146 | __cond_lock(lock, __spin_trylock_irqsave(lock, flags)) | |
147 | ||
148 | #define spin_is_contended(lock) (((void)(lock), 0)) | |
149 | ||
150 | static inline int spin_is_locked(spinlock_t *lock) | |
151 | { | |
152 | return rt_mutex_base_is_locked(&lock->lock); | |
153 | } | |
154 | ||
155 | #define assert_spin_locked(lock) BUG_ON(!spin_is_locked(lock)) | |
156 | ||
8282947f TG |
157 | #include <linux/rwlock_rt.h> |
158 | ||
342a9324 | 159 | #endif |