diff options
Diffstat (limited to 'include/asm-m68k/semaphore-helper.h')
-rw-r--r-- | include/asm-m68k/semaphore-helper.h | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/include/asm-m68k/semaphore-helper.h b/include/asm-m68k/semaphore-helper.h deleted file mode 100644 index eef30ba0b499..000000000000 --- a/include/asm-m68k/semaphore-helper.h +++ /dev/null | |||
@@ -1,142 +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 | #include <linux/errno.h> | ||
13 | |||
14 | /* | ||
15 | * These two _must_ execute atomically wrt each other. | ||
16 | */ | ||
17 | static inline void wake_one_more(struct semaphore * sem) | ||
18 | { | ||
19 | atomic_inc(&sem->waking); | ||
20 | } | ||
21 | |||
22 | #ifndef CONFIG_RMW_INSNS | ||
23 | extern spinlock_t semaphore_wake_lock; | ||
24 | #endif | ||
25 | |||
26 | static inline int waking_non_zero(struct semaphore *sem) | ||
27 | { | ||
28 | int ret; | ||
29 | #ifndef CONFIG_RMW_INSNS | ||
30 | unsigned long flags; | ||
31 | |||
32 | spin_lock_irqsave(&semaphore_wake_lock, flags); | ||
33 | ret = 0; | ||
34 | if (atomic_read(&sem->waking) > 0) { | ||
35 | atomic_dec(&sem->waking); | ||
36 | ret = 1; | ||
37 | } | ||
38 | spin_unlock_irqrestore(&semaphore_wake_lock, flags); | ||
39 | #else | ||
40 | int tmp1, tmp2; | ||
41 | |||
42 | __asm__ __volatile__ | ||
43 | ("1: movel %1,%2\n" | ||
44 | " jle 2f\n" | ||
45 | " subql #1,%2\n" | ||
46 | " casl %1,%2,%3\n" | ||
47 | " jne 1b\n" | ||
48 | " moveq #1,%0\n" | ||
49 | "2:" | ||
50 | : "=d" (ret), "=d" (tmp1), "=d" (tmp2) | ||
51 | : "m" (sem->waking), "0" (0), "1" (sem->waking)); | ||
52 | #endif | ||
53 | |||
54 | return ret; | ||
55 | } | ||
56 | |||
57 | /* | ||
58 | * waking_non_zero_interruptible: | ||
59 | * 1 got the lock | ||
60 | * 0 go to sleep | ||
61 | * -EINTR interrupted | ||
62 | */ | ||
63 | static inline int waking_non_zero_interruptible(struct semaphore *sem, | ||
64 | struct task_struct *tsk) | ||
65 | { | ||
66 | int ret; | ||
67 | #ifndef CONFIG_RMW_INSNS | ||
68 | unsigned long flags; | ||
69 | |||
70 | spin_lock_irqsave(&semaphore_wake_lock, flags); | ||
71 | ret = 0; | ||
72 | if (atomic_read(&sem->waking) > 0) { | ||
73 | atomic_dec(&sem->waking); | ||
74 | ret = 1; | ||
75 | } else if (signal_pending(tsk)) { | ||
76 | atomic_inc(&sem->count); | ||
77 | ret = -EINTR; | ||
78 | } | ||
79 | spin_unlock_irqrestore(&semaphore_wake_lock, flags); | ||
80 | #else | ||
81 | int tmp1, tmp2; | ||
82 | |||
83 | __asm__ __volatile__ | ||
84 | ("1: movel %1,%2\n" | ||
85 | " jle 2f\n" | ||
86 | " subql #1,%2\n" | ||
87 | " casl %1,%2,%3\n" | ||
88 | " jne 1b\n" | ||
89 | " moveq #1,%0\n" | ||
90 | " jra %a4\n" | ||
91 | "2:" | ||
92 | : "=d" (ret), "=d" (tmp1), "=d" (tmp2) | ||
93 | : "m" (sem->waking), "i" (&&next), "0" (0), "1" (sem->waking)); | ||
94 | if (signal_pending(tsk)) { | ||
95 | atomic_inc(&sem->count); | ||
96 | ret = -EINTR; | ||
97 | } | ||
98 | next: | ||
99 | #endif | ||
100 | |||
101 | return ret; | ||
102 | } | ||
103 | |||
104 | /* | ||
105 | * waking_non_zero_trylock: | ||
106 | * 1 failed to lock | ||
107 | * 0 got the lock | ||
108 | */ | ||
109 | static inline int waking_non_zero_trylock(struct semaphore *sem) | ||
110 | { | ||
111 | int ret; | ||
112 | #ifndef CONFIG_RMW_INSNS | ||
113 | unsigned long flags; | ||
114 | |||
115 | spin_lock_irqsave(&semaphore_wake_lock, flags); | ||
116 | ret = 1; | ||
117 | if (atomic_read(&sem->waking) > 0) { | ||
118 | atomic_dec(&sem->waking); | ||
119 | ret = 0; | ||
120 | } else | ||
121 | atomic_inc(&sem->count); | ||
122 | spin_unlock_irqrestore(&semaphore_wake_lock, flags); | ||
123 | #else | ||
124 | int tmp1, tmp2; | ||
125 | |||
126 | __asm__ __volatile__ | ||
127 | ("1: movel %1,%2\n" | ||
128 | " jle 2f\n" | ||
129 | " subql #1,%2\n" | ||
130 | " casl %1,%2,%3\n" | ||
131 | " jne 1b\n" | ||
132 | " moveq #0,%0\n" | ||
133 | "2:" | ||
134 | : "=d" (ret), "=d" (tmp1), "=d" (tmp2) | ||
135 | : "m" (sem->waking), "0" (1), "1" (sem->waking)); | ||
136 | if (ret) | ||
137 | atomic_inc(&sem->count); | ||
138 | #endif | ||
139 | return ret; | ||
140 | } | ||
141 | |||
142 | #endif | ||