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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - include/linux/spinlock_types.h
1 #ifndef __LINUX_SPINLOCK_TYPES_H
2 #define __LINUX_SPINLOCK_TYPES_H
5 * include/linux/spinlock_types.h - generic spinlock type definitions
8 * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
9 * Released under the General Public License (GPL).
12 #if defined(CONFIG_SMP)
13 # include <asm/spinlock_types.h>
15 # include <linux/spinlock_types_up.h>
18 #include <linux/lockdep.h>
21 raw_spinlock_t raw_lock
;
22 #ifdef CONFIG_GENERIC_LOCKBREAK
23 unsigned int break_lock
;
25 #ifdef CONFIG_DEBUG_SPINLOCK
26 unsigned int magic
, owner_cpu
;
29 #ifdef CONFIG_DEBUG_LOCK_ALLOC
30 struct lockdep_map dep_map
;
34 #define SPINLOCK_MAGIC 0xdead4ead
37 raw_rwlock_t raw_lock
;
38 #ifdef CONFIG_GENERIC_LOCKBREAK
39 unsigned int break_lock
;
41 #ifdef CONFIG_DEBUG_SPINLOCK
42 unsigned int magic
, owner_cpu
;
45 #ifdef CONFIG_DEBUG_LOCK_ALLOC
46 struct lockdep_map dep_map
;
50 #define RWLOCK_MAGIC 0xdeaf1eed
52 #define SPINLOCK_OWNER_INIT ((void *)-1L)
54 #ifdef CONFIG_DEBUG_LOCK_ALLOC
55 # define SPIN_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname }
57 # define SPIN_DEP_MAP_INIT(lockname)
60 #ifdef CONFIG_DEBUG_LOCK_ALLOC
61 # define RW_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname }
63 # define RW_DEP_MAP_INIT(lockname)
66 #ifdef CONFIG_DEBUG_SPINLOCK
67 # define __SPIN_LOCK_UNLOCKED(lockname) \
68 (spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \
69 .magic = SPINLOCK_MAGIC, \
70 .owner = SPINLOCK_OWNER_INIT, \
72 SPIN_DEP_MAP_INIT(lockname) }
73 #define __RW_LOCK_UNLOCKED(lockname) \
74 (rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \
75 .magic = RWLOCK_MAGIC, \
76 .owner = SPINLOCK_OWNER_INIT, \
78 RW_DEP_MAP_INIT(lockname) }
80 # define __SPIN_LOCK_UNLOCKED(lockname) \
81 (spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \
82 SPIN_DEP_MAP_INIT(lockname) }
83 #define __RW_LOCK_UNLOCKED(lockname) \
84 (rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \
85 RW_DEP_MAP_INIT(lockname) }
89 * SPIN_LOCK_UNLOCKED and RW_LOCK_UNLOCKED defeat lockdep state tracking and
90 * are hence deprecated.
91 * Please use DEFINE_SPINLOCK()/DEFINE_RWLOCK() or
92 * __SPIN_LOCK_UNLOCKED()/__RW_LOCK_UNLOCKED() as appropriate.
94 #define SPIN_LOCK_UNLOCKED __SPIN_LOCK_UNLOCKED(old_style_spin_init)
95 #define RW_LOCK_UNLOCKED __RW_LOCK_UNLOCKED(old_style_rw_init)
97 #define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
98 #define DEFINE_RWLOCK(x) rwlock_t x = __RW_LOCK_UNLOCKED(x)
100 #endif /* __LINUX_SPINLOCK_TYPES_H */