diff options
Diffstat (limited to 'include/asm-alpha/spinlock.h')
-rw-r--r-- | include/asm-alpha/spinlock.h | 96 |
1 files changed, 27 insertions, 69 deletions
diff --git a/include/asm-alpha/spinlock.h b/include/asm-alpha/spinlock.h index 80780dba9986..8197c69eff44 100644 --- a/include/asm-alpha/spinlock.h +++ b/include/asm-alpha/spinlock.h | |||
@@ -6,7 +6,6 @@ | |||
6 | #include <linux/kernel.h> | 6 | #include <linux/kernel.h> |
7 | #include <asm/current.h> | 7 | #include <asm/current.h> |
8 | 8 | ||
9 | |||
10 | /* | 9 | /* |
11 | * Simple spin lock operations. There are two variants, one clears IRQ's | 10 | * Simple spin lock operations. There are two variants, one clears IRQ's |
12 | * on the local processor, one does not. | 11 | * on the local processor, one does not. |
@@ -14,43 +13,18 @@ | |||
14 | * We make no fairness assumptions. They have a cost. | 13 | * We make no fairness assumptions. They have a cost. |
15 | */ | 14 | */ |
16 | 15 | ||
17 | typedef struct { | 16 | #define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock) |
18 | volatile unsigned int lock; | 17 | #define __raw_spin_is_locked(x) ((x)->lock != 0) |
19 | #ifdef CONFIG_DEBUG_SPINLOCK | 18 | #define __raw_spin_unlock_wait(x) \ |
20 | int on_cpu; | 19 | do { cpu_relax(); } while ((x)->lock) |
21 | int line_no; | 20 | |
22 | void *previous; | 21 | static inline void __raw_spin_unlock(raw_spinlock_t * lock) |
23 | struct task_struct * task; | ||
24 | const char *base_file; | ||
25 | #endif | ||
26 | } spinlock_t; | ||
27 | |||
28 | #ifdef CONFIG_DEBUG_SPINLOCK | ||
29 | #define SPIN_LOCK_UNLOCKED (spinlock_t){ 0, -1, 0, NULL, NULL, NULL } | ||
30 | #else | ||
31 | #define SPIN_LOCK_UNLOCKED (spinlock_t){ 0 } | ||
32 | #endif | ||
33 | |||
34 | #define spin_lock_init(x) do { *(x) = SPIN_LOCK_UNLOCKED; } while(0) | ||
35 | #define spin_is_locked(x) ((x)->lock != 0) | ||
36 | #define spin_unlock_wait(x) do { barrier(); } while ((x)->lock) | ||
37 | |||
38 | #ifdef CONFIG_DEBUG_SPINLOCK | ||
39 | extern void _raw_spin_unlock(spinlock_t * lock); | ||
40 | extern void debug_spin_lock(spinlock_t * lock, const char *, int); | ||
41 | extern int debug_spin_trylock(spinlock_t * lock, const char *, int); | ||
42 | #define _raw_spin_lock(LOCK) \ | ||
43 | debug_spin_lock(LOCK, __BASE_FILE__, __LINE__) | ||
44 | #define _raw_spin_trylock(LOCK) \ | ||
45 | debug_spin_trylock(LOCK, __BASE_FILE__, __LINE__) | ||
46 | #else | ||
47 | static inline void _raw_spin_unlock(spinlock_t * lock) | ||
48 | { | 22 | { |
49 | mb(); | 23 | mb(); |
50 | lock->lock = 0; | 24 | lock->lock = 0; |
51 | } | 25 | } |
52 | 26 | ||
53 | static inline void _raw_spin_lock(spinlock_t * lock) | 27 | static inline void __raw_spin_lock(raw_spinlock_t * lock) |
54 | { | 28 | { |
55 | long tmp; | 29 | long tmp; |
56 | 30 | ||
@@ -70,80 +44,64 @@ static inline void _raw_spin_lock(spinlock_t * lock) | |||
70 | : "m"(lock->lock) : "memory"); | 44 | : "m"(lock->lock) : "memory"); |
71 | } | 45 | } |
72 | 46 | ||
73 | static inline int _raw_spin_trylock(spinlock_t *lock) | 47 | static inline int __raw_spin_trylock(raw_spinlock_t *lock) |
74 | { | 48 | { |
75 | return !test_and_set_bit(0, &lock->lock); | 49 | return !test_and_set_bit(0, &lock->lock); |
76 | } | 50 | } |
77 | #endif /* CONFIG_DEBUG_SPINLOCK */ | ||
78 | |||
79 | #define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock) | ||
80 | 51 | ||
81 | /***********************************************************/ | 52 | /***********************************************************/ |
82 | 53 | ||
83 | typedef struct { | 54 | static inline int __raw_read_can_lock(raw_rwlock_t *lock) |
84 | volatile unsigned int lock; | ||
85 | } rwlock_t; | ||
86 | |||
87 | #define RW_LOCK_UNLOCKED (rwlock_t){ 0 } | ||
88 | |||
89 | #define rwlock_init(x) do { *(x) = RW_LOCK_UNLOCKED; } while(0) | ||
90 | |||
91 | static inline int read_can_lock(rwlock_t *lock) | ||
92 | { | 55 | { |
93 | return (lock->lock & 1) == 0; | 56 | return (lock->lock & 1) == 0; |
94 | } | 57 | } |
95 | 58 | ||
96 | static inline int write_can_lock(rwlock_t *lock) | 59 | static inline int __raw_write_can_lock(raw_rwlock_t *lock) |
97 | { | 60 | { |
98 | return lock->lock == 0; | 61 | return lock->lock == 0; |
99 | } | 62 | } |
100 | 63 | ||
101 | #ifdef CONFIG_DEBUG_RWLOCK | 64 | static inline void __raw_read_lock(raw_rwlock_t *lock) |
102 | extern void _raw_write_lock(rwlock_t * lock); | ||
103 | extern void _raw_read_lock(rwlock_t * lock); | ||
104 | #else | ||
105 | static inline void _raw_write_lock(rwlock_t * lock) | ||
106 | { | 65 | { |
107 | long regx; | 66 | long regx; |
108 | 67 | ||
109 | __asm__ __volatile__( | 68 | __asm__ __volatile__( |
110 | "1: ldl_l %1,%0\n" | 69 | "1: ldl_l %1,%0\n" |
111 | " bne %1,6f\n" | 70 | " blbs %1,6f\n" |
112 | " lda %1,1\n" | 71 | " subl %1,2,%1\n" |
113 | " stl_c %1,%0\n" | 72 | " stl_c %1,%0\n" |
114 | " beq %1,6f\n" | 73 | " beq %1,6f\n" |
115 | " mb\n" | 74 | " mb\n" |
116 | ".subsection 2\n" | 75 | ".subsection 2\n" |
117 | "6: ldl %1,%0\n" | 76 | "6: ldl %1,%0\n" |
118 | " bne %1,6b\n" | 77 | " blbs %1,6b\n" |
119 | " br 1b\n" | 78 | " br 1b\n" |
120 | ".previous" | 79 | ".previous" |
121 | : "=m" (*lock), "=&r" (regx) | 80 | : "=m" (*lock), "=&r" (regx) |
122 | : "m" (*lock) : "memory"); | 81 | : "m" (*lock) : "memory"); |
123 | } | 82 | } |
124 | 83 | ||
125 | static inline void _raw_read_lock(rwlock_t * lock) | 84 | static inline void __raw_write_lock(raw_rwlock_t *lock) |
126 | { | 85 | { |
127 | long regx; | 86 | long regx; |
128 | 87 | ||
129 | __asm__ __volatile__( | 88 | __asm__ __volatile__( |
130 | "1: ldl_l %1,%0\n" | 89 | "1: ldl_l %1,%0\n" |
131 | " blbs %1,6f\n" | 90 | " bne %1,6f\n" |
132 | " subl %1,2,%1\n" | 91 | " lda %1,1\n" |
133 | " stl_c %1,%0\n" | 92 | " stl_c %1,%0\n" |
134 | " beq %1,6f\n" | 93 | " beq %1,6f\n" |
135 | " mb\n" | 94 | " mb\n" |
136 | ".subsection 2\n" | 95 | ".subsection 2\n" |
137 | "6: ldl %1,%0\n" | 96 | "6: ldl %1,%0\n" |
138 | " blbs %1,6b\n" | 97 | " bne %1,6b\n" |
139 | " br 1b\n" | 98 | " br 1b\n" |
140 | ".previous" | 99 | ".previous" |
141 | : "=m" (*lock), "=&r" (regx) | 100 | : "=m" (*lock), "=&r" (regx) |
142 | : "m" (*lock) : "memory"); | 101 | : "m" (*lock) : "memory"); |
143 | } | 102 | } |
144 | #endif /* CONFIG_DEBUG_RWLOCK */ | ||
145 | 103 | ||
146 | static inline int _raw_read_trylock(rwlock_t * lock) | 104 | static inline int __raw_read_trylock(raw_rwlock_t * lock) |
147 | { | 105 | { |
148 | long regx; | 106 | long regx; |
149 | int success; | 107 | int success; |
@@ -165,7 +123,7 @@ static inline int _raw_read_trylock(rwlock_t * lock) | |||
165 | return success; | 123 | return success; |
166 | } | 124 | } |
167 | 125 | ||
168 | static inline int _raw_write_trylock(rwlock_t * lock) | 126 | static inline int __raw_write_trylock(raw_rwlock_t * lock) |
169 | { | 127 | { |
170 | long regx; | 128 | long regx; |
171 | int success; | 129 | int success; |
@@ -187,13 +145,7 @@ static inline int _raw_write_trylock(rwlock_t * lock) | |||
187 | return success; | 145 | return success; |
188 | } | 146 | } |
189 | 147 | ||
190 | static inline void _raw_write_unlock(rwlock_t * lock) | 148 | static inline void __raw_read_unlock(raw_rwlock_t * lock) |
191 | { | ||
192 | mb(); | ||
193 | lock->lock = 0; | ||
194 | } | ||
195 | |||
196 | static inline void _raw_read_unlock(rwlock_t * lock) | ||
197 | { | 149 | { |
198 | long regx; | 150 | long regx; |
199 | __asm__ __volatile__( | 151 | __asm__ __volatile__( |
@@ -209,4 +161,10 @@ static inline void _raw_read_unlock(rwlock_t * lock) | |||
209 | : "m" (*lock) : "memory"); | 161 | : "m" (*lock) : "memory"); |
210 | } | 162 | } |
211 | 163 | ||
164 | static inline void __raw_write_unlock(raw_rwlock_t * lock) | ||
165 | { | ||
166 | mb(); | ||
167 | lock->lock = 0; | ||
168 | } | ||
169 | |||
212 | #endif /* _ALPHA_SPINLOCK_H */ | 170 | #endif /* _ALPHA_SPINLOCK_H */ |