1 #ifndef __LINUX_RWLOCK_TYPES_H
2 #define __LINUX_RWLOCK_TYPES_H
5 * include/linux/rwlock_types.h - generic rwlock type definitions
8 * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
9 * Released under the General Public License (GPL).
12 arch_rwlock_t raw_lock;
13 #ifdef CONFIG_DEBUG_SPINLOCK
14 unsigned int magic, owner_cpu;
17 #ifdef CONFIG_DEBUG_LOCK_ALLOC
18 struct lockdep_map dep_map;
22 #define RWLOCK_MAGIC 0xdeaf1eed
24 #ifdef CONFIG_DEBUG_LOCK_ALLOC
25 # define RW_DEP_MAP_INIT(lockname) \
28 .wait_type_inner = LD_WAIT_CONFIG, \
31 # define RW_DEP_MAP_INIT(lockname)
34 #ifdef CONFIG_DEBUG_SPINLOCK
35 #define __RW_LOCK_UNLOCKED(lockname) \
36 (rwlock_t) { .raw_lock = __ARCH_RW_LOCK_UNLOCKED, \
37 .magic = RWLOCK_MAGIC, \
38 .owner = SPINLOCK_OWNER_INIT, \
40 RW_DEP_MAP_INIT(lockname) }
42 #define __RW_LOCK_UNLOCKED(lockname) \
43 (rwlock_t) { .raw_lock = __ARCH_RW_LOCK_UNLOCKED, \
44 RW_DEP_MAP_INIT(lockname) }
47 #define DEFINE_RWLOCK(x) rwlock_t x = __RW_LOCK_UNLOCKED(x)
49 #endif /* __LINUX_RWLOCK_TYPES_H */