block: get rid of elv_insert() interface
[linux-2.6.git] / include / linux / rwlock_types.h
1 #ifndef __LINUX_RWLOCK_TYPES_H
2 #define __LINUX_RWLOCK_TYPES_H
3
4 /*
5  * include/linux/rwlock_types.h - generic rwlock 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 typedef struct {
12         arch_rwlock_t raw_lock;
13 #ifdef CONFIG_GENERIC_LOCKBREAK
14         unsigned int break_lock;
15 #endif
16 #ifdef CONFIG_DEBUG_SPINLOCK
17         unsigned int magic, owner_cpu;
18         void *owner;
19 #endif
20 #ifdef CONFIG_DEBUG_LOCK_ALLOC
21         struct lockdep_map dep_map;
22 #endif
23 } rwlock_t;
24
25 #define RWLOCK_MAGIC            0xdeaf1eed
26
27 #ifdef CONFIG_DEBUG_LOCK_ALLOC
28 # define RW_DEP_MAP_INIT(lockname)      .dep_map = { .name = #lockname }
29 #else
30 # define RW_DEP_MAP_INIT(lockname)
31 #endif
32
33 #ifdef CONFIG_DEBUG_SPINLOCK
34 #define __RW_LOCK_UNLOCKED(lockname)                                    \
35         (rwlock_t)      {       .raw_lock = __ARCH_RW_LOCK_UNLOCKED,    \
36                                 .magic = RWLOCK_MAGIC,                  \
37                                 .owner = SPINLOCK_OWNER_INIT,           \
38                                 .owner_cpu = -1,                        \
39                                 RW_DEP_MAP_INIT(lockname) }
40 #else
41 #define __RW_LOCK_UNLOCKED(lockname) \
42         (rwlock_t)      {       .raw_lock = __ARCH_RW_LOCK_UNLOCKED,    \
43                                 RW_DEP_MAP_INIT(lockname) }
44 #endif
45
46 #define DEFINE_RWLOCK(x)        rwlock_t x = __RW_LOCK_UNLOCKED(x)
47
48 #endif /* __LINUX_RWLOCK_TYPES_H */