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-rw-r--r--include/asm-sparc64/atomic.h53
1 files changed, 38 insertions, 15 deletions
diff --git a/include/asm-sparc64/atomic.h b/include/asm-sparc64/atomic.h
index 2f0bec26a695..3fb4e1f7f186 100644
--- a/include/asm-sparc64/atomic.h
+++ b/include/asm-sparc64/atomic.h
@@ -9,6 +9,7 @@
9#define __ARCH_SPARC64_ATOMIC__ 9#define __ARCH_SPARC64_ATOMIC__
10 10
11#include <linux/types.h> 11#include <linux/types.h>
12#include <asm/system.h>
12 13
13typedef struct { volatile int counter; } atomic_t; 14typedef struct { volatile int counter; } atomic_t;
14typedef struct { volatile __s64 counter; } atomic64_t; 15typedef struct { volatile __s64 counter; } atomic64_t;
@@ -70,25 +71,47 @@ extern int atomic64_sub_ret(int, atomic64_t *);
70#define atomic_add_negative(i, v) (atomic_add_ret(i, v) < 0) 71#define atomic_add_negative(i, v) (atomic_add_ret(i, v) < 0)
71#define atomic64_add_negative(i, v) (atomic64_add_ret(i, v) < 0) 72#define atomic64_add_negative(i, v) (atomic64_add_ret(i, v) < 0)
72 73
73#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n))) 74#define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n)))
74#define atomic_xchg(v, new) (xchg(&((v)->counter), new)) 75#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
75 76
76#define atomic_add_unless(v, a, u) \ 77static __inline__ int atomic_add_unless(atomic_t *v, int a, int u)
77({ \ 78{
78 int c, old; \ 79 int c, old;
79 c = atomic_read(v); \ 80 c = atomic_read(v);
80 for (;;) { \ 81 for (;;) {
81 if (unlikely(c == (u))) \ 82 if (unlikely(c == (u)))
82 break; \ 83 break;
83 old = atomic_cmpxchg((v), c, c + (a)); \ 84 old = atomic_cmpxchg((v), c, c + (a));
84 if (likely(old == c)) \ 85 if (likely(old == c))
85 break; \ 86 break;
86 c = old; \ 87 c = old;
87 } \ 88 }
88 likely(c != (u)); \ 89 return c != (u);
89}) 90}
91
90#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) 92#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
91 93
94#define atomic64_cmpxchg(v, o, n) \
95 ((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n)))
96#define atomic64_xchg(v, new) (xchg(&((v)->counter), new))
97
98static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u)
99{
100 long c, old;
101 c = atomic64_read(v);
102 for (;;) {
103 if (unlikely(c == (u)))
104 break;
105 old = atomic64_cmpxchg((v), c, c + (a));
106 if (likely(old == c))
107 break;
108 c = old;
109 }
110 return c != (u);
111}
112
113#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)
114
92/* Atomic operations are already serializing */ 115/* Atomic operations are already serializing */
93#ifdef CONFIG_SMP 116#ifdef CONFIG_SMP
94#define smp_mb__before_atomic_dec() membar_storeload_loadload(); 117#define smp_mb__before_atomic_dec() membar_storeload_loadload();