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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2966 | Serge | 1 | #include |
| 2 | #include |
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| 3 | |||
| 4 | |||
| 5 | void kref_set(struct kref *kref, int num) |
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| 6 | { |
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| 7 | atomic_set(&kref->refcount, num); |
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| 8 | } |
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| 9 | |||
| 10 | /** |
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| 11 | * kref_init - initialize object. |
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| 12 | * @kref: object in question. |
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| 13 | */ |
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| 14 | void kref_init(struct kref *kref) |
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| 15 | { |
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| 16 | kref_set(kref, 1); |
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| 17 | } |
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| 18 | |||
| 19 | void kref_get(struct kref *kref) |
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| 20 | { |
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| 21 | // WARN_ON(!atomic_read(&kref->refcount)); |
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| 22 | atomic_inc(&kref->refcount); |
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| 23 | } |
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| 24 | |||
| 25 | |||
| 26 | int kref_put(struct kref *kref, void (*release)(struct kref *kref)) |
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| 27 | { |
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| 28 | // WARN_ON(release == NULL); |
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| 29 | // WARN_ON(release == (void (*)(struct kref *))kfree); |
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| 30 | |||
| 31 | if (atomic_dec_and_test(&kref->refcount)) { |
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| 32 | release(kref); |
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| 33 | return 1; |
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| 34 | } |
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| 35 | return 0; |
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| 36 | } |
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| 37 |