1#ifndef __LINUX_SPINLOCK_API_UP_H
2#define __LINUX_SPINLOCK_API_UP_H
3
4#ifndef __LINUX_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_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 supress compiler warnings of unused lock
25 * variables, and to add the proper checker annotations:
26 */
27#ifdef CONFIG_PREEMPT
28#define __LOCK(lock) \
29  do { preempt_disable(); __acquire(lock); (void)(lock); } while (0)
30#else /* CONFIG_PREEMPT */
31#define __LOCK(lock) \
32  (void)(lock)
33#endif
34
35#define __LOCK_BH(lock) \
36  do { local_bh_disable(); __LOCK(lock); } while (0)
37
38#define __LOCK_IRQ(lock) \
39  do { local_irq_disable(); __LOCK(lock); } while (0)
40
41#define __LOCK_IRQSAVE(lock, flags) \
42  do { local_irq_save(flags); __LOCK(lock); } while (0)
43
44#ifdef  CONFIG_PREEMPT
45#define __UNLOCK(lock) \
46  do { preempt_enable(); __release(lock); (void)(lock); } while (0)
47#else
48#define __UNLOCK(lock) \
49	do { } while(0)
50#endif
51
52#define __UNLOCK_BH(lock) \
53  do { preempt_enable_no_resched(); local_bh_enable(); __release(lock); (void)(lock); } while (0)
54
55#define __UNLOCK_IRQ(lock) \
56  do { local_irq_enable(); __UNLOCK(lock); } while (0)
57
58#define __UNLOCK_IRQRESTORE(lock, flags) \
59  do { local_irq_restore(flags); __UNLOCK(lock); } while (0)
60
61#define _spin_lock(lock)			__LOCK(lock)
62#define _spin_lock_nested(lock, subclass)	__LOCK(lock)
63#define _read_lock(lock)			__LOCK(lock)
64#define _write_lock(lock)			__LOCK(lock)
65#define _spin_lock_bh(lock)			__LOCK_BH(lock)
66#define _read_lock_bh(lock)			__LOCK_BH(lock)
67#define _write_lock_bh(lock)			__LOCK_BH(lock)
68#define _spin_lock_irq(lock)			__LOCK_IRQ(lock)
69#define _read_lock_irq(lock)			__LOCK_IRQ(lock)
70#define _write_lock_irq(lock)			__LOCK_IRQ(lock)
71#define _spin_lock_irqsave(lock, flags)		__LOCK_IRQSAVE(lock, flags)
72#define _read_lock_irqsave(lock, flags)		__LOCK_IRQSAVE(lock, flags)
73#define _write_lock_irqsave(lock, flags)	__LOCK_IRQSAVE(lock, flags)
74#define _spin_trylock(lock)			({ __LOCK(lock); 1; })
75#define _read_trylock(lock)			({ __LOCK(lock); 1; })
76#define _write_trylock(lock)			({ __LOCK(lock); 1; })
77#define _spin_trylock_bh(lock)			({ __LOCK_BH(lock); 1; })
78#define _spin_unlock(lock)			__UNLOCK(lock)
79#define _read_unlock(lock)			__UNLOCK(lock)
80#define _write_unlock(lock)			__UNLOCK(lock)
81#define _spin_unlock_bh(lock)			__UNLOCK_BH(lock)
82#define _write_unlock_bh(lock)			__UNLOCK_BH(lock)
83#define _read_unlock_bh(lock)			__UNLOCK_BH(lock)
84#define _spin_unlock_irq(lock)			__UNLOCK_IRQ(lock)
85#define _read_unlock_irq(lock)			__UNLOCK_IRQ(lock)
86#define _write_unlock_irq(lock)			__UNLOCK_IRQ(lock)
87#define _spin_unlock_irqrestore(lock, flags)	__UNLOCK_IRQRESTORE(lock, flags)
88#define _read_unlock_irqrestore(lock, flags)	__UNLOCK_IRQRESTORE(lock, flags)
89#define _write_unlock_irqrestore(lock, flags)	__UNLOCK_IRQRESTORE(lock, flags)
90
91#endif /* __LINUX_SPINLOCK_API_UP_H */
92