Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
spinlock_api_up.h
Go to the documentation of this file.
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_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 { preempt_disable(); __acquire(lock); (void)(lock); } while (0)
29 
30 #define __LOCK_BH(lock) \
31  do { local_bh_disable(); __LOCK(lock); } while (0)
32 
33 #define __LOCK_IRQ(lock) \
34  do { local_irq_disable(); __LOCK(lock); } while (0)
35 
36 #define __LOCK_IRQSAVE(lock, flags) \
37  do { local_irq_save(flags); __LOCK(lock); } while (0)
38 
39 #define __UNLOCK(lock) \
40  do { preempt_enable(); __release(lock); (void)(lock); } while (0)
41 
42 #define __UNLOCK_BH(lock) \
43  do { preempt_enable_no_resched(); local_bh_enable(); \
44  __release(lock); (void)(lock); } while (0)
45 
46 #define __UNLOCK_IRQ(lock) \
47  do { local_irq_enable(); __UNLOCK(lock); } while (0)
48 
49 #define __UNLOCK_IRQRESTORE(lock, flags) \
50  do { local_irq_restore(flags); __UNLOCK(lock); } while (0)
51 
52 #define _raw_spin_lock(lock) __LOCK(lock)
53 #define _raw_spin_lock_nested(lock, subclass) __LOCK(lock)
54 #define _raw_read_lock(lock) __LOCK(lock)
55 #define _raw_write_lock(lock) __LOCK(lock)
56 #define _raw_spin_lock_bh(lock) __LOCK_BH(lock)
57 #define _raw_read_lock_bh(lock) __LOCK_BH(lock)
58 #define _raw_write_lock_bh(lock) __LOCK_BH(lock)
59 #define _raw_spin_lock_irq(lock) __LOCK_IRQ(lock)
60 #define _raw_read_lock_irq(lock) __LOCK_IRQ(lock)
61 #define _raw_write_lock_irq(lock) __LOCK_IRQ(lock)
62 #define _raw_spin_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
63 #define _raw_read_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
64 #define _raw_write_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
65 #define _raw_spin_trylock(lock) ({ __LOCK(lock); 1; })
66 #define _raw_read_trylock(lock) ({ __LOCK(lock); 1; })
67 #define _raw_write_trylock(lock) ({ __LOCK(lock); 1; })
68 #define _raw_spin_trylock_bh(lock) ({ __LOCK_BH(lock); 1; })
69 #define _raw_spin_unlock(lock) __UNLOCK(lock)
70 #define _raw_read_unlock(lock) __UNLOCK(lock)
71 #define _raw_write_unlock(lock) __UNLOCK(lock)
72 #define _raw_spin_unlock_bh(lock) __UNLOCK_BH(lock)
73 #define _raw_write_unlock_bh(lock) __UNLOCK_BH(lock)
74 #define _raw_read_unlock_bh(lock) __UNLOCK_BH(lock)
75 #define _raw_spin_unlock_irq(lock) __UNLOCK_IRQ(lock)
76 #define _raw_read_unlock_irq(lock) __UNLOCK_IRQ(lock)
77 #define _raw_write_unlock_irq(lock) __UNLOCK_IRQ(lock)
78 #define _raw_spin_unlock_irqrestore(lock, flags) \
79  __UNLOCK_IRQRESTORE(lock, flags)
80 #define _raw_read_unlock_irqrestore(lock, flags) \
81  __UNLOCK_IRQRESTORE(lock, flags)
82 #define _raw_write_unlock_irqrestore(lock, flags) \
83  __UNLOCK_IRQRESTORE(lock, flags)
84 
85 #endif /* __LINUX_SPINLOCK_API_UP_H */