#ifndef __LINUX_RWLOCK_TYPES_H #define __LINUX_RWLOCK_TYPES_H /* * include/linux/rwlock_types.h - generic rwlock type definitions * and initializers * * portions Copyright 2005, Red Hat, Inc., Ingo Molnar * Released under the General Public License (GPL). */ typedef struct { arch_rwlock_t raw_lock; #ifdef CONFIG_DEBUG_SPINLOCK unsigned int magic, owner_cpu; void *owner; #endif #ifdef CONFIG_DEBUG_LOCK_ALLOC struct lockdep_map dep_map; #endif } rwlock_t; #define RWLOCK_MAGIC 0xdeaf1eed #ifdef CONFIG_DEBUG_LOCK_ALLOC # define RW_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname } #else # define RW_DEP_MAP_INIT(lockname) #endif #ifdef CONFIG_DEBUG_SPINLOCK #define __RW_LOCK_UNLOCKED(lockname) \ (rwlock_t) { .raw_lock = __ARCH_RW_LOCK_UNLOCKED, \ .magic = RWLOCK_MAGIC, \ .owner = SPINLOCK_OWNER_INIT, \ .owner_cpu = -1, \ RW_DEP_MAP_INIT(lockname) } #else #define __RW_LOCK_UNLOCKED(lockname) \ (rwlock_t) { .raw_lock = __ARCH_RW_LOCK_UNLOCKED, \ RW_DEP_MAP_INIT(lockname) } #endif #define DEFINE_RWLOCK(x) rwlock_t x = __RW_LOCK_UNLOCKED(x) #endif /* __LINUX_RWLOCK_TYPES_H */