diff options
Diffstat (limited to 'include/asm-m68knommu/semaphore-helper.h')
-rw-r--r-- | include/asm-m68knommu/semaphore-helper.h | 82 |
1 files changed, 0 insertions, 82 deletions
diff --git a/include/asm-m68knommu/semaphore-helper.h b/include/asm-m68knommu/semaphore-helper.h deleted file mode 100644 index 43da7bc483c7..000000000000 --- a/include/asm-m68knommu/semaphore-helper.h +++ /dev/null | |||
@@ -1,82 +0,0 @@ | |||
1 | #ifndef _M68K_SEMAPHORE_HELPER_H | ||
2 | #define _M68K_SEMAPHORE_HELPER_H | ||
3 | |||
4 | /* | ||
5 | * SMP- and interrupt-safe semaphores helper functions. | ||
6 | * | ||
7 | * (C) Copyright 1996 Linus Torvalds | ||
8 | * | ||
9 | * m68k version by Andreas Schwab | ||
10 | */ | ||
11 | |||
12 | |||
13 | /* | ||
14 | * These two _must_ execute atomically wrt each other. | ||
15 | */ | ||
16 | static inline void wake_one_more(struct semaphore * sem) | ||
17 | { | ||
18 | atomic_inc(&sem->waking); | ||
19 | } | ||
20 | |||
21 | static inline int waking_non_zero(struct semaphore *sem) | ||
22 | { | ||
23 | int ret; | ||
24 | unsigned long flags; | ||
25 | |||
26 | spin_lock_irqsave(&semaphore_wake_lock, flags); | ||
27 | ret = 0; | ||
28 | if (atomic_read(&sem->waking) > 0) { | ||
29 | atomic_dec(&sem->waking); | ||
30 | ret = 1; | ||
31 | } | ||
32 | spin_unlock_irqrestore(&semaphore_wake_lock, flags); | ||
33 | return ret; | ||
34 | } | ||
35 | |||
36 | /* | ||
37 | * waking_non_zero_interruptible: | ||
38 | * 1 got the lock | ||
39 | * 0 go to sleep | ||
40 | * -EINTR interrupted | ||
41 | */ | ||
42 | static inline int waking_non_zero_interruptible(struct semaphore *sem, | ||
43 | struct task_struct *tsk) | ||
44 | { | ||
45 | int ret; | ||
46 | unsigned long flags; | ||
47 | |||
48 | spin_lock_irqsave(&semaphore_wake_lock, flags); | ||
49 | ret = 0; | ||
50 | if (atomic_read(&sem->waking) > 0) { | ||
51 | atomic_dec(&sem->waking); | ||
52 | ret = 1; | ||
53 | } else if (signal_pending(tsk)) { | ||
54 | atomic_inc(&sem->count); | ||
55 | ret = -EINTR; | ||
56 | } | ||
57 | spin_unlock_irqrestore(&semaphore_wake_lock, flags); | ||
58 | return ret; | ||
59 | } | ||
60 | |||
61 | /* | ||
62 | * waking_non_zero_trylock: | ||
63 | * 1 failed to lock | ||
64 | * 0 got the lock | ||
65 | */ | ||
66 | static inline int waking_non_zero_trylock(struct semaphore *sem) | ||
67 | { | ||
68 | int ret; | ||
69 | unsigned long flags; | ||
70 | |||
71 | spin_lock_irqsave(&semaphore_wake_lock, flags); | ||
72 | ret = 1; | ||
73 | if (atomic_read(&sem->waking) > 0) { | ||
74 | atomic_dec(&sem->waking); | ||
75 | ret = 0; | ||
76 | } else | ||
77 | atomic_inc(&sem->count); | ||
78 | spin_unlock_irqrestore(&semaphore_wake_lock, flags); | ||
79 | return ret; | ||
80 | } | ||
81 | |||
82 | #endif | ||