-extern void put_unused_fd(unsigned int fd);
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,7,0)
-extern struct file*
-sock_alloc_file(struct socket *sock,
- int flags, const char *dname);
-
-extern int get_unused_fd_flags(unsigned flags);
-
-extern void fd_install(unsigned int fd, struct file *file);
-