include/linux/refcount_types.h

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