| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _LINUX_REFCOUNT_TYPES_H |
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| 3 | #define _LINUX_REFCOUNT_TYPES_H |
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| 4 | |
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| 5 | #include <linux/types.h> |
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| 6 | |
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| 7 | /** |
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| 8 | * typedef refcount_t - variant of atomic_t specialized for reference counts |
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| 9 | * @refs: atomic_t counter field |
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| 10 | * |
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| 11 | * The counter saturates at REFCOUNT_SATURATED and will not move once |
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| 12 | * there. This avoids wrapping the counter and causing 'spurious' |
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| 13 | * use-after-free bugs. |
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| 14 | */ |
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| 15 | typedef struct refcount_struct { |
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| 16 | atomic_t refs; |
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| 17 | } refcount_t; |
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| 18 | |
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| 19 | #endif /* _LINUX_REFCOUNT_TYPES_H */ |
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| 20 | |
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