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33 | 33 | ||
34 | typedef volatile __u32 atomic_t; |
34 | typedef volatile __u32 atomic_t; |
35 | 35 | ||
36 | static inline void atomic_inc(atomic_t *val) { |
36 | static inline void atomic_inc(atomic_t *val) { |
37 | #ifdef CONFIG_SMP |
37 | #ifdef CONFIG_SMP |
38 | __asm__ volatile ("lock incl %0\n" : "=m" (*val)); |
38 | __asm__ volatile ("lock incl %0\n" : "+m" (*val)); |
39 | #else |
39 | #else |
40 | __asm__ volatile ("incl %0\n" : "=m" (*val)); |
40 | __asm__ volatile ("incl %0\n" : "+m" (*val)); |
41 | #endif /* CONFIG_SMP */ |
41 | #endif /* CONFIG_SMP */ |
42 | } |
42 | } |
43 | 43 | ||
44 | static inline void atomic_dec(atomic_t *val) { |
44 | static inline void atomic_dec(atomic_t *val) { |
45 | #ifdef CONFIG_SMP |
45 | #ifdef CONFIG_SMP |
46 | __asm__ volatile ("lock decl %0\n" : "=m" (*val)); |
46 | __asm__ volatile ("lock decl %0\n" : "+m" (*val)); |
47 | #else |
47 | #else |
48 | __asm__ volatile ("decl %0\n" : "=m" (*val)); |
48 | __asm__ volatile ("decl %0\n" : "+m" (*val)); |
49 | #endif /* CONFIG_SMP */ |
49 | #endif /* CONFIG_SMP */ |
50 | } |
50 | } |
51 | 51 | ||
- | 52 | static inline atomic_t atomic_inc_pre(atomic_t *val) |
|
- | 53 | { |
|
- | 54 | atomic_t r; |
|
- | 55 | __asm__ volatile ( |
|
- | 56 | "movl $1,%0;" |
|
- | 57 | "lock xaddl %0,%1;" |
|
- | 58 | : "=r"(r), "+m" (*val) |
|
- | 59 | ); |
|
- | 60 | return r; |
|
- | 61 | } |
|
- | 62 | ||
- | 63 | ||
- | 64 | ||
- | 65 | static inline atomic_t atomic_dec_pre(atomic_t *val) |
|
- | 66 | { |
|
- | 67 | atomic_t r; |
|
- | 68 | __asm__ volatile ( |
|
- | 69 | "movl $-1,%0;" |
|
- | 70 | "lock xaddl %0,%1;" |
|
- | 71 | : "=r"(r), "+m" (*val) |
|
- | 72 | ); |
|
- | 73 | return r; |
|
- | 74 | } |
|
- | 75 | ||
- | 76 | #define atomic_inc_post(val) (atomic_inc_pre(val)+1) |
|
- | 77 | #define atomic_dec_post(val) (atomic_dec_pre(val)-1) |
|
- | 78 | ||
- | 79 | ||
- | 80 | ||
52 | static inline int test_and_set(volatile int *val) { |
81 | static inline int test_and_set(volatile int *val) { |
53 | int v; |
82 | int v; |
54 | 83 | ||
55 | __asm__ volatile ( |
84 | __asm__ volatile ( |
56 | "movl $1, %0\n" |
85 | "movl $1, %0\n" |
57 | "xchgl %0, %1\n" |
86 | "xchgl %0, %1\n" |
58 | : "=r" (v),"=m" (*val) |
87 | : "=r" (v),"+m" (*val) |
59 | ); |
88 | ); |
60 | 89 | ||
61 | return v; |
90 | return v; |
62 | } |
91 | } |
63 | 92 |