Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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_types.h>
19
20typedef struct raw_spinlock {
21 arch_spinlock_t raw_lock;
22#ifdef CONFIG_DEBUG_SPINLOCK
23 unsigned int magic, owner_cpu;
24 void *owner;
25#endif
26#ifdef CONFIG_DEBUG_LOCK_ALLOC
27 struct lockdep_map dep_map;
28#endif
29} raw_spinlock_t;
30
31#define SPINLOCK_MAGIC 0xdead4ead
32
33#define SPINLOCK_OWNER_INIT ((void *)-1L)
34
35#ifdef CONFIG_DEBUG_LOCK_ALLOC
36# define RAW_SPIN_DEP_MAP_INIT(lockname) \
37 .dep_map = { \
38 .name = #lockname, \
39 .wait_type_inner = LD_WAIT_SPIN, \
40 }
41# define SPIN_DEP_MAP_INIT(lockname) \
42 .dep_map = { \
43 .name = #lockname, \
44 .wait_type_inner = LD_WAIT_CONFIG, \
45 }
46#else
47# define RAW_SPIN_DEP_MAP_INIT(lockname)
48# define SPIN_DEP_MAP_INIT(lockname)
49#endif
50
51#ifdef CONFIG_DEBUG_SPINLOCK
52# define SPIN_DEBUG_INIT(lockname) \
53 .magic = SPINLOCK_MAGIC, \
54 .owner_cpu = -1, \
55 .owner = SPINLOCK_OWNER_INIT,
56#else
57# define SPIN_DEBUG_INIT(lockname)
58#endif
59
60#define __RAW_SPIN_LOCK_INITIALIZER(lockname) \
61 { \
62 .raw_lock = __ARCH_SPIN_LOCK_UNLOCKED, \
63 SPIN_DEBUG_INIT(lockname) \
64 RAW_SPIN_DEP_MAP_INIT(lockname) }
65
66#define __RAW_SPIN_LOCK_UNLOCKED(lockname) \
67 (raw_spinlock_t) __RAW_SPIN_LOCK_INITIALIZER(lockname)
68
69#define DEFINE_RAW_SPINLOCK(x) raw_spinlock_t x = __RAW_SPIN_LOCK_UNLOCKED(x)
70
71typedef struct spinlock {
72 union {
73 struct raw_spinlock rlock;
74
75#ifdef CONFIG_DEBUG_LOCK_ALLOC
76# define LOCK_PADSIZE (offsetof(struct raw_spinlock, dep_map))
77 struct {
78 u8 __padding[LOCK_PADSIZE];
79 struct lockdep_map dep_map;
80 };
81#endif
82 };
83} spinlock_t;
84
85#define ___SPIN_LOCK_INITIALIZER(lockname) \
86 { \
87 .raw_lock = __ARCH_SPIN_LOCK_UNLOCKED, \
88 SPIN_DEBUG_INIT(lockname) \
89 SPIN_DEP_MAP_INIT(lockname) }
90
91#define __SPIN_LOCK_INITIALIZER(lockname) \
92 { { .rlock = ___SPIN_LOCK_INITIALIZER(lockname) } }
93
94#define __SPIN_LOCK_UNLOCKED(lockname) \
95 (spinlock_t) __SPIN_LOCK_INITIALIZER(lockname)
96
97#define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
98
99#include <linux/rwlock_types.h>
100
101#endif /* __LINUX_SPINLOCK_TYPES_H */