projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| fb1c8f93 IM |
1 | #ifndef __LINUX_SPINLOCK_TYPES_H |
| 2 | #define __LINUX_SPINLOCK_TYPES_H | |
| 3 | ||
| 4 | /* | |
| 5 | * include/linux/spinlock_types.h - generic spinlock 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 | ||
| 12 | #if defined(CONFIG_SMP) | |
| 13 | # include <asm/spinlock_types.h> | |
| 14 | #else | |
| 15 | # include <linux/spinlock_types_up.h> | |
| 16 | #endif | |
| 17 | ||
| 21f8ca3b PZ |
18 | #include <linux/lockdep.h> |
| 19 | ||
| fb1c8f93 IM |
20 | typedef struct { |
| 21 | raw_spinlock_t raw_lock; | |
| 95c354fe | 22 | #ifdef CONFIG_GENERIC_LOCKBREAK |
| fb1c8f93 IM |
23 | unsigned int break_lock; |
| 24 | #endif | |
| 25 | #ifdef CONFIG_DEBUG_SPINLOCK | |
| 26 | unsigned int magic, owner_cpu; | |
| 27 | void *owner; | |
| 28 | #endif | |
| 8a25d5de IM |
29 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 30 | struct lockdep_map dep_map; | |
| 31 | #endif | |
| fb1c8f93 IM |
32 | } spinlock_t; |
| 33 | ||
| 34 | #define SPINLOCK_MAGIC 0xdead4ead | |
| 35 | ||
| 36 | typedef struct { | |
| 37 | raw_rwlock_t raw_lock; | |
| 95c354fe | 38 | #ifdef CONFIG_GENERIC_LOCKBREAK |
| fb1c8f93 IM |
39 | unsigned int break_lock; |
| 40 | #endif | |
| 41 | #ifdef CONFIG_DEBUG_SPINLOCK | |
| 42 | unsigned int magic, owner_cpu; | |
| 43 | void *owner; | |
| 44 | #endif | |
| 8a25d5de IM |
45 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 46 | struct lockdep_map dep_map; | |
| 47 | #endif | |
| fb1c8f93 IM |
48 | } rwlock_t; |
| 49 | ||
| 50 | #define RWLOCK_MAGIC 0xdeaf1eed | |
| 51 | ||
| 52 | #define SPINLOCK_OWNER_INIT ((void *)-1L) | |
| 53 | ||
| 8a25d5de IM |
54 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 55 | # define SPIN_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname } | |
| 56 | #else | |
| 57 | # define SPIN_DEP_MAP_INIT(lockname) | |
| 58 | #endif | |
| 59 | ||
| 60 | #ifdef CONFIG_DEBUG_LOCK_ALLOC | |
| 61 | # define RW_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname } | |
| 62 | #else | |
| 63 | # define RW_DEP_MAP_INIT(lockname) | |
| 64 | #endif | |
| 65 | ||
| fb1c8f93 | 66 | #ifdef CONFIG_DEBUG_SPINLOCK |
| e4d91918 | 67 | # define __SPIN_LOCK_UNLOCKED(lockname) \ |
| fb1c8f93 IM |
68 | (spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \ |
| 69 | .magic = SPINLOCK_MAGIC, \ | |
| 70 | .owner = SPINLOCK_OWNER_INIT, \ | |
| 8a25d5de IM |
71 | .owner_cpu = -1, \ |
| 72 | SPIN_DEP_MAP_INIT(lockname) } | |
| e4d91918 | 73 | #define __RW_LOCK_UNLOCKED(lockname) \ |
| fb1c8f93 IM |
74 | (rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \ |
| 75 | .magic = RWLOCK_MAGIC, \ | |
| 76 | .owner = SPINLOCK_OWNER_INIT, \ | |
| 8a25d5de IM |
77 | .owner_cpu = -1, \ |
| 78 | RW_DEP_MAP_INIT(lockname) } | |
| fb1c8f93 | 79 | #else |
| e4d91918 | 80 | # define __SPIN_LOCK_UNLOCKED(lockname) \ |
| 8a25d5de IM |
81 | (spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \ |
| 82 | SPIN_DEP_MAP_INIT(lockname) } | |
| e4d91918 | 83 | #define __RW_LOCK_UNLOCKED(lockname) \ |
| 8a25d5de IM |
84 | (rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \ |
| 85 | RW_DEP_MAP_INIT(lockname) } | |
| fb1c8f93 IM |
86 | #endif |
| 87 | ||
| d1ab824b ME |
88 | /* |
| 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. | |
| 93 | */ | |
| e4d91918 IM |
94 | #define SPIN_LOCK_UNLOCKED __SPIN_LOCK_UNLOCKED(old_style_spin_init) |
| 95 | #define RW_LOCK_UNLOCKED __RW_LOCK_UNLOCKED(old_style_rw_init) | |
| 96 | ||
| 97 | #define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x) | |
| 98 | #define DEFINE_RWLOCK(x) rwlock_t x = __RW_LOCK_UNLOCKED(x) | |
| fb1c8f93 IM |
99 | |
| 100 | #endif /* __LINUX_SPINLOCK_TYPES_H */ |