projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| ef12f109 TG |
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 { | |
| fb3a6bbc | 12 | arch_rwlock_t raw_lock; |
| ef12f109 TG |
13 | #ifdef CONFIG_DEBUG_SPINLOCK |
| 14 | unsigned int magic, owner_cpu; | |
| 15 | void *owner; | |
| 16 | #endif | |
| 17 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
| 18 | struct lockdep_map dep_map; | |
| 19 | #endif | |
| 20 | } rwlock_t; | |
| 21 | ||
| 22 | #define RWLOCK_MAGIC 0xdeaf1eed | |
| 23 | ||
| 24 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
| 25 | # define RW_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname } | |
| 26 | #else | |
| 27 | # define RW_DEP_MAP_INIT(lockname) | |
| 28 | #endif | |
| 29 | ||
| 30 | #ifdef CONFIG_DEBUG_SPINLOCK | |
| 31 | #define __RW_LOCK_UNLOCKED(lockname) \ | |
| fb3a6bbc | 32 | (rwlock_t) { .raw_lock = __ARCH_RW_LOCK_UNLOCKED, \ |
| ef12f109 TG |
33 | .magic = RWLOCK_MAGIC, \ |
| 34 | .owner = SPINLOCK_OWNER_INIT, \ | |
| 35 | .owner_cpu = -1, \ | |
| 36 | RW_DEP_MAP_INIT(lockname) } | |
| 37 | #else | |
| 38 | #define __RW_LOCK_UNLOCKED(lockname) \ | |
| fb3a6bbc | 39 | (rwlock_t) { .raw_lock = __ARCH_RW_LOCK_UNLOCKED, \ |
| ef12f109 TG |
40 | RW_DEP_MAP_INIT(lockname) } |
| 41 | #endif | |
| 42 | ||
| ef12f109 TG |
43 | #define DEFINE_RWLOCK(x) rwlock_t x = __RW_LOCK_UNLOCKED(x) |
| 44 | ||
| 45 | #endif /* __LINUX_RWLOCK_TYPES_H */ |