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| Rev | Author | Line No. | Line |
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| 1408 | serge | 1 | #ifndef __LINUX_SPINLOCK_TYPES_H |
| 2 | #define __LINUX_SPINLOCK_TYPES_H |
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| 3 | |||
| 4 | /* |
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| 5 | * include/linux/spinlock_types.h - generic spinlock type definitions |
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| 6 | * and initializers |
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| 7 | * |
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| 8 | * portions Copyright 2005, Red Hat, Inc., Ingo Molnar |
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| 9 | * Released under the General Public License (GPL). |
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| 10 | */ |
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| 11 | |||
| 12 | #if defined(CONFIG_SMP) |
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| 13 | # include |
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| 14 | #else |
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| 15 | # include |
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| 16 | #endif |
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| 17 | |||
| 18 | #include |
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| 19 | |||
| 3243 | Serge | 20 | typedef struct spinlock { |
| 1408 | serge | 21 | raw_spinlock_t raw_lock; |
| 22 | #ifdef CONFIG_GENERIC_LOCKBREAK |
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| 23 | unsigned int break_lock; |
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| 24 | #endif |
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| 25 | #ifdef CONFIG_DEBUG_SPINLOCK |
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| 26 | unsigned int magic, owner_cpu; |
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| 27 | void *owner; |
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| 28 | #endif |
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| 29 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
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| 30 | struct lockdep_map dep_map; |
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| 31 | #endif |
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| 32 | } spinlock_t; |
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| 33 | |||
| 34 | #define SPINLOCK_MAGIC 0xdead4ead |
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| 35 | |||
| 36 | typedef struct { |
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| 37 | raw_rwlock_t raw_lock; |
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| 38 | #ifdef CONFIG_GENERIC_LOCKBREAK |
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| 39 | unsigned int break_lock; |
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| 40 | #endif |
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| 41 | #ifdef CONFIG_DEBUG_SPINLOCK |
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| 42 | unsigned int magic, owner_cpu; |
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| 43 | void *owner; |
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| 44 | #endif |
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| 45 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
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| 46 | struct lockdep_map dep_map; |
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| 47 | #endif |
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| 48 | } rwlock_t; |
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| 49 | |||
| 50 | #define RWLOCK_MAGIC 0xdeaf1eed |
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| 51 | |||
| 52 | #define SPINLOCK_OWNER_INIT ((void *)-1L) |
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| 53 | |||
| 54 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
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| 55 | # define SPIN_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname } |
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| 56 | #else |
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| 57 | # define SPIN_DEP_MAP_INIT(lockname) |
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| 58 | #endif |
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| 59 | |||
| 60 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
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| 61 | # define RW_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname } |
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| 62 | #else |
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| 63 | # define RW_DEP_MAP_INIT(lockname) |
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| 64 | #endif |
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| 65 | |||
| 66 | #ifdef CONFIG_DEBUG_SPINLOCK |
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| 67 | # define __SPIN_LOCK_UNLOCKED(lockname) \ |
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| 68 | (spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \ |
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| 69 | .magic = SPINLOCK_MAGIC, \ |
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| 70 | .owner = SPINLOCK_OWNER_INIT, \ |
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| 71 | .owner_cpu = -1, \ |
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| 72 | SPIN_DEP_MAP_INIT(lockname) } |
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| 73 | #define __RW_LOCK_UNLOCKED(lockname) \ |
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| 74 | (rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \ |
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| 75 | .magic = RWLOCK_MAGIC, \ |
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| 76 | .owner = SPINLOCK_OWNER_INIT, \ |
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| 77 | .owner_cpu = -1, \ |
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| 78 | RW_DEP_MAP_INIT(lockname) } |
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| 79 | #else |
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| 80 | # define __SPIN_LOCK_UNLOCKED(lockname) \ |
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| 81 | (spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \ |
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| 82 | SPIN_DEP_MAP_INIT(lockname) } |
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| 83 | #define __RW_LOCK_UNLOCKED(lockname) \ |
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| 84 | (rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \ |
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| 85 | RW_DEP_MAP_INIT(lockname) } |
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| 86 | #endif |
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| 87 | |||
| 88 | /* |
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| 89 | * SPIN_LOCK_UNLOCKED and RW_LOCK_UNLOCKED defeat lockdep state tracking and |
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| 90 | * are hence deprecated. |
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| 91 | * Please use DEFINE_SPINLOCK()/DEFINE_RWLOCK() or |
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| 92 | * __SPIN_LOCK_UNLOCKED()/__RW_LOCK_UNLOCKED() as appropriate. |
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| 93 | */ |
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| 94 | #define SPIN_LOCK_UNLOCKED __SPIN_LOCK_UNLOCKED(old_style_spin_init) |
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| 95 | #define RW_LOCK_UNLOCKED __RW_LOCK_UNLOCKED(old_style_rw_init) |
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| 96 | |||
| 97 | #define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x) |
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| 98 | #define DEFINE_RWLOCK(x) rwlock_t x = __RW_LOCK_UNLOCKED(x) |
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| 99 | |||
| 100 | #endif /* __LINUX_SPINLOCK_TYPES_H */ |