xref: /linux-6.15/include/linux/eventfd.h (revision aeb3f462)
1 /*
2  *  include/linux/eventfd.h
3  *
4  *  Copyright (C) 2007  Davide Libenzi <[email protected]>
5  *
6  */
7 
8 #ifndef _LINUX_EVENTFD_H
9 #define _LINUX_EVENTFD_H
10 
11 
12 #ifdef __KERNEL__
13 
14 #ifdef CONFIG_EVENTFD
15 
16 struct file *eventfd_fget(int fd);
17 int eventfd_signal(struct file *file, int n);
18 
19 #else /* CONFIG_EVENTFD */
20 
21 #define eventfd_fget(fd) ERR_PTR(-ENOSYS)
22 static inline int eventfd_signal(struct file *file, int n)
23 { return 0; }
24 
25 #endif /* CONFIG_EVENTFD */
26 
27 #endif /* __KERNEL__ */
28 
29 #endif /* _LINUX_EVENTFD_H */
30 
31