linux-imx
Public
Source
committed 450b1f6f56373
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retval = 0;74
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if (lockref->count > 0) {75
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lockref->count++;76
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retval = 1;77
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}78
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spin_unlock(&lockref->lock);79
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return retval;80
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}81
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EXPORT_SYMBOL(lockref_get_not_zero);82
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/**84
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* lockref_put_not_zero - Decrements count unless count <= 1 before decrement85
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* @lockref: pointer to lockref structure86
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* Return: 1 if count updated successfully or 0 if count would become zero87
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*/88
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int lockref_put_not_zero(struct lockref *lockref)89
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{90
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int retval;91
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92
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CMPXCHG_LOOP(93
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new.count--;94
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if (old.count <= 1)95
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return 0;96
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,97
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return 1;98
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);99
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spin_lock(&lockref->lock);101
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retval = 0;102
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if (lockref->count > 1) {103
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lockref->count--;104
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retval = 1;105
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}106
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spin_unlock(&lockref->lock);107
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return retval;108
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}109
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EXPORT_SYMBOL(lockref_put_not_zero);110
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/**84
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* lockref_get_or_lock - Increments count unless the count is 0 or dead85
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* @lockref: pointer to lockref structure86
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* Return: 1 if count updated successfully or 0 if count was zero87
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* and we got the lock instead.88
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*/89
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int lockref_get_or_lock(struct lockref *lockref)90
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{91
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CMPXCHG_LOOP(92
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new.count++;