diff options
Diffstat (limited to 'arch/sh/include/asm/atomic-llsc.h')
-rw-r--r-- | arch/sh/include/asm/atomic-llsc.h | 27 |
1 files changed, 0 insertions, 27 deletions
diff --git a/arch/sh/include/asm/atomic-llsc.h b/arch/sh/include/asm/atomic-llsc.h index b040e1e08610..4b00b78e3f4f 100644 --- a/arch/sh/include/asm/atomic-llsc.h +++ b/arch/sh/include/asm/atomic-llsc.h | |||
@@ -104,31 +104,4 @@ static inline void atomic_set_mask(unsigned int mask, atomic_t *v) | |||
104 | : "t"); | 104 | : "t"); |
105 | } | 105 | } |
106 | 106 | ||
107 | #define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n))) | ||
108 | |||
109 | /** | ||
110 | * atomic_add_unless - add unless the number is a given value | ||
111 | * @v: pointer of type atomic_t | ||
112 | * @a: the amount to add to v... | ||
113 | * @u: ...unless v is equal to u. | ||
114 | * | ||
115 | * Atomically adds @a to @v, so long as it was not @u. | ||
116 | * Returns non-zero if @v was not @u, and zero otherwise. | ||
117 | */ | ||
118 | static inline int atomic_add_unless(atomic_t *v, int a, int u) | ||
119 | { | ||
120 | int c, old; | ||
121 | c = atomic_read(v); | ||
122 | for (;;) { | ||
123 | if (unlikely(c == (u))) | ||
124 | break; | ||
125 | old = atomic_cmpxchg((v), c, c + (a)); | ||
126 | if (likely(old == c)) | ||
127 | break; | ||
128 | c = old; | ||
129 | } | ||
130 | |||
131 | return c != (u); | ||
132 | } | ||
133 | |||
134 | #endif /* __ASM_SH_ATOMIC_LLSC_H */ | 107 | #endif /* __ASM_SH_ATOMIC_LLSC_H */ |