kernel-ark/include/linux/eventfd.h
Randy Dunlap d2fd89962c eventfd: clean compile when CONFIG_EVENTFD=n
Fix gcc warning and add parameter checking when CONFIG_EVENTFD=n:

fs/aio.c: In function 'aio_complete':
fs/aio.c:955: warning: statement with no effect

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-06-28 11:34:53 -07:00

31 lines
512 B
C

/*
* include/linux/eventfd.h
*
* Copyright (C) 2007 Davide Libenzi <davidel@xmailserver.org>
*
*/
#ifndef _LINUX_EVENTFD_H
#define _LINUX_EVENTFD_H
#ifdef __KERNEL__
#ifdef CONFIG_EVENTFD
struct file *eventfd_fget(int fd);
int eventfd_signal(struct file *file, int n);
#else /* CONFIG_EVENTFD */
#define eventfd_fget(fd) ERR_PTR(-ENOSYS)
static inline int eventfd_signal(struct file *file, int n)
{ return 0; }
#endif /* CONFIG_EVENTFD */
#endif /* __KERNEL__ */
#endif /* _LINUX_EVENTFD_H */