1  #ifndef __LINUX_SPINLOCK_API_UP_H
2  #define __LINUX_SPINLOCK_API_UP_H
3  
4  #ifndef __LINUX_INSIDE_SPINLOCK_H
5  # error "please don't include this file directly"
6  #endif
7  
8  /*
9   * include/linux/spinlock_api_up.h
10   *
11   * spinlock API implementation on UP-nondebug (inlined implementation)
12   *
13   * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
14   * Released under the General Public License (GPL).
15   */
16  
17  #define in_lock_functions(ADDR)		0
18  
19  #define assert_raw_spin_locked(lock)	do { (void)(lock); } while (0)
20  
21  /*
22   * In the UP-nondebug case there's no real locking going on, so the
23   * only thing we have to do is to keep the preempt counts and irq
24   * flags straight, to suppress compiler warnings of unused lock
25   * variables, and to add the proper checker annotations:
26   */
27  #define ___LOCK(lock) \
28    do { __acquire(lock); (void)(lock); } while (0)
29  
30  #define __LOCK(lock) \
31    do { preempt_disable(); ___LOCK(lock); } while (0)
32  
33  #define __LOCK_BH(lock) \
34    do { __local_bh_disable_ip(_THIS_IP_, SOFTIRQ_LOCK_OFFSET); ___LOCK(lock); } while (0)
35  
36  #define __LOCK_IRQ(lock) \
37    do { local_irq_disable(); __LOCK(lock); } while (0)
38  
39  #define __LOCK_IRQSAVE(lock, flags) \
40    do { local_irq_save(flags); __LOCK(lock); } while (0)
41  
42  #define ___UNLOCK(lock) \
43    do { __release(lock); (void)(lock); } while (0)
44  
45  #define __UNLOCK(lock) \
46    do { preempt_enable(); ___UNLOCK(lock); } while (0)
47  
48  #define __UNLOCK_BH(lock) \
49    do { __local_bh_enable_ip(_THIS_IP_, SOFTIRQ_LOCK_OFFSET); \
50         ___UNLOCK(lock); } while (0)
51  
52  #define __UNLOCK_IRQ(lock) \
53    do { local_irq_enable(); __UNLOCK(lock); } while (0)
54  
55  #define __UNLOCK_IRQRESTORE(lock, flags) \
56    do { local_irq_restore(flags); __UNLOCK(lock); } while (0)
57  
58  #define _raw_spin_lock(lock)			__LOCK(lock)
59  #define _raw_spin_lock_nested(lock, subclass)	__LOCK(lock)
60  #define _raw_read_lock(lock)			__LOCK(lock)
61  #define _raw_write_lock(lock)			__LOCK(lock)
62  #define _raw_write_lock_nested(lock, subclass)	__LOCK(lock)
63  #define _raw_spin_lock_bh(lock)			__LOCK_BH(lock)
64  #define _raw_read_lock_bh(lock)			__LOCK_BH(lock)
65  #define _raw_write_lock_bh(lock)		__LOCK_BH(lock)
66  #define _raw_spin_lock_irq(lock)		__LOCK_IRQ(lock)
67  #define _raw_read_lock_irq(lock)		__LOCK_IRQ(lock)
68  #define _raw_write_lock_irq(lock)		__LOCK_IRQ(lock)
69  #define _raw_spin_lock_irqsave(lock, flags)	__LOCK_IRQSAVE(lock, flags)
70  #define _raw_read_lock_irqsave(lock, flags)	__LOCK_IRQSAVE(lock, flags)
71  #define _raw_write_lock_irqsave(lock, flags)	__LOCK_IRQSAVE(lock, flags)
72  #define _raw_spin_trylock(lock)			({ __LOCK(lock); 1; })
73  #define _raw_read_trylock(lock)			({ __LOCK(lock); 1; })
74  #define _raw_write_trylock(lock)			({ __LOCK(lock); 1; })
75  #define _raw_spin_trylock_bh(lock)		({ __LOCK_BH(lock); 1; })
76  #define _raw_spin_unlock(lock)			__UNLOCK(lock)
77  #define _raw_read_unlock(lock)			__UNLOCK(lock)
78  #define _raw_write_unlock(lock)			__UNLOCK(lock)
79  #define _raw_spin_unlock_bh(lock)		__UNLOCK_BH(lock)
80  #define _raw_write_unlock_bh(lock)		__UNLOCK_BH(lock)
81  #define _raw_read_unlock_bh(lock)		__UNLOCK_BH(lock)
82  #define _raw_spin_unlock_irq(lock)		__UNLOCK_IRQ(lock)
83  #define _raw_read_unlock_irq(lock)		__UNLOCK_IRQ(lock)
84  #define _raw_write_unlock_irq(lock)		__UNLOCK_IRQ(lock)
85  #define _raw_spin_unlock_irqrestore(lock, flags) \
86  					__UNLOCK_IRQRESTORE(lock, flags)
87  #define _raw_read_unlock_irqrestore(lock, flags) \
88  					__UNLOCK_IRQRESTORE(lock, flags)
89  #define _raw_write_unlock_irqrestore(lock, flags) \
90  					__UNLOCK_IRQRESTORE(lock, flags)
91  
92  #endif /* __LINUX_SPINLOCK_API_UP_H */
93