1243 long do_splice(struct file *in, loff_t *off_in, struct file *out,  in do_splice()  argument
1259 		if (off_in || off_out)  in do_splice()
1271 		if (off_in)  in do_splice()
1302 		if (off_in) {  in do_splice()
1305 			offset = *off_in;  in do_splice()
1315 		if (!off_in)  in do_splice()
1318 			*off_in = offset;  in do_splice()
1336 static long __do_splice(struct file *in, loff_t __user *off_in,  in __do_splice()  argument
1349 		if (off_in)  in __do_splice()
1364 	if (off_in) {  in __do_splice()
1365 		if (copy_from_user(&offset, off_in, sizeof(loff_t)))  in __do_splice()
1376 	if (__off_in && copy_to_user(off_in, __off_in, sizeof(loff_t)))  in __do_splice()
1568 SYSCALL_DEFINE6(splice, int, fd_in, loff_t __user *, off_in,  in SYSCALL_DEFINE6()  argument
1586 			error = __do_splice(in.file, off_in, out.file, off_out,  in SYSCALL_DEFINE6()