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1 : #ifndef __LINUX_SPINLOCK_TYPES_H
2 : #define __LINUX_SPINLOCK_TYPES_H
3 :
4 : /*
5 : * include/linux/spinlock_types.h - generic spinlock type definitions
6 : * and initializers
7 : *
8 : * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
9 : * Released under the General Public License (GPL).
10 : */
11 :
12 : #if defined(CONFIG_SMP)
13 : # include <asm/spinlock_types.h>
14 : #else
15 : # include <linux/spinlock_types_up.h>
16 : #endif
17 :
18 : #include <linux/lockdep.h>
19 :
20 : typedef struct raw_spinlock {
21 : arch_spinlock_t raw_lock;
22 : #ifdef CONFIG_GENERIC_LOCKBREAK
23 : unsigned int break_lock;
24 : #endif
25 : #ifdef CONFIG_DEBUG_SPINLOCK
26 : unsigned int magic, owner_cpu;
27 : void *owner;
28 : #endif
29 : #ifdef CONFIG_DEBUG_LOCK_ALLOC
30 : struct lockdep_map dep_map;
31 : #endif
32 1 : } raw_spinlock_t;
33 2 :
34 : #define SPINLOCK_MAGIC 0xdead4ead
35 :
36 : #define SPINLOCK_OWNER_INIT ((void *)-1L)
37 :
38 : #ifdef CONFIG_DEBUG_LOCK_ALLOC
39 : # define SPIN_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname }
40 : #else
41 : # define SPIN_DEP_MAP_INIT(lockname)
42 : #endif
43 :
44 : #ifdef CONFIG_DEBUG_SPINLOCK
45 : # define SPIN_DEBUG_INIT(lockname) \
46 : .magic = SPINLOCK_MAGIC, \
47 : .owner_cpu = -1, \
48 : .owner = SPINLOCK_OWNER_INIT,
49 : #else
50 : # define SPIN_DEBUG_INIT(lockname)
51 : #endif
52 :
53 : #define __RAW_SPIN_LOCK_INITIALIZER(lockname) \
54 : { \
55 : .raw_lock = __ARCH_SPIN_LOCK_UNLOCKED, \
56 : SPIN_DEBUG_INIT(lockname) \
57 : SPIN_DEP_MAP_INIT(lockname) }
58 :
59 : #define __RAW_SPIN_LOCK_UNLOCKED(lockname) \
60 : (raw_spinlock_t) __RAW_SPIN_LOCK_INITIALIZER(lockname)
61 :
62 : #define DEFINE_RAW_SPINLOCK(x) raw_spinlock_t x = __RAW_SPIN_LOCK_UNLOCKED(x)
63 :
64 : typedef struct spinlock {
65 : union {
66 : struct raw_spinlock rlock;
67 :
68 : #ifdef CONFIG_DEBUG_LOCK_ALLOC
69 : # define LOCK_PADSIZE (offsetof(struct raw_spinlock, dep_map))
70 : struct {
71 : u8 __padding[LOCK_PADSIZE];
72 : struct lockdep_map dep_map;
73 : };
74 : #endif
75 : };
76 1 : } spinlock_t;
77 :
78 : #define __SPIN_LOCK_INITIALIZER(lockname) \
79 : { { .rlock = __RAW_SPIN_LOCK_INITIALIZER(lockname) } }
80 :
81 : #define __SPIN_LOCK_UNLOCKED(lockname) \
82 : (spinlock_t ) __SPIN_LOCK_INITIALIZER(lockname)
83 :
84 : /*
85 : * SPIN_LOCK_UNLOCKED defeats lockdep state tracking and is hence
86 : * deprecated.
87 : * Please use DEFINE_SPINLOCK() or __SPIN_LOCK_UNLOCKED() as
88 : * appropriate.
89 : */
90 : #define SPIN_LOCK_UNLOCKED __SPIN_LOCK_UNLOCKED(old_style_spin_init)
91 :
92 : #define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
93 :
94 : #include <linux/rwlock_types.h>
95 :
96 : #endif /* __LINUX_SPINLOCK_TYPES_H */
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