typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *);
typedef ssize_t (*iov_fn_t)(struct kiocb *, const struct iovec *,
unsigned long, loff_t);
-
-ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos, size_t count,
- loff_t max);