1382 ssize_t generic_copy_file_range(struct file *file_in, loff_t pos_in,  in generic_copy_file_range()  argument
1386 	return do_splice_direct(file_in, &pos_in, file_out, &pos_out,  in generic_copy_file_range()
1391 static ssize_t do_copy_file_range(struct file *file_in, loff_t pos_in,  in do_copy_file_range()  argument
1404 	    file_out->f_op->copy_file_range == file_in->f_op->copy_file_range)  in do_copy_file_range()
1405 		return file_out->f_op->copy_file_range(file_in, pos_in,  in do_copy_file_range()
1409 	return generic_copy_file_range(file_in, pos_in, file_out, pos_out, len,  in do_copy_file_range()
1420 static int generic_copy_file_checks(struct file *file_in, loff_t pos_in,  in generic_copy_file_checks()  argument
1424 	struct inode *inode_in = file_inode(file_in);  in generic_copy_file_checks()
1430 	ret = generic_file_rw_checks(file_in, file_out);  in generic_copy_file_checks()
1471 ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in,  in vfs_copy_file_range()  argument
1480 	ret = generic_copy_file_checks(file_in, pos_in, file_out, pos_out, &len,  in vfs_copy_file_range()
1485 	ret = rw_verify_area(READ, file_in, &pos_in, len);  in vfs_copy_file_range()
1502 	if (file_in->f_op->remap_file_range &&  in vfs_copy_file_range()
1503 	    file_inode(file_in)->i_sb == file_inode(file_out)->i_sb) {  in vfs_copy_file_range()
1506 		cloned = file_in->f_op->remap_file_range(file_in, pos_in,  in vfs_copy_file_range()
1516 	ret = do_copy_file_range(file_in, pos_in, file_out, pos_out, len,  in vfs_copy_file_range()
1521 		fsnotify_access(file_in);  in vfs_copy_file_range()
1669 int generic_file_rw_checks(struct file *file_in, struct file *file_out)  in generic_file_rw_checks()  argument
1671 	struct inode *inode_in = file_inode(file_in);  in generic_file_rw_checks()
1680 	if (!(file_in->f_mode & FMODE_READ) ||  in generic_file_rw_checks()