linux-master/mm/filemap.c

666  * @lstart:	offset in bytes where the range starts
669  * Write out and wait upon file offsets lstart->lend, inclusive.
677 				 loff_t lstart, loff_t lend)
681 	if (lend < lstart)
685 		err = __filemap_fdatawrite_range(mapping, lstart, lend,
694 			__filemap_fdatawait_range(mapping, lstart, lend);
766  * @lstart:	offset in bytes where the range starts
769  * Write out and wait upon file offsets lstart->lend, inclusive.
779 int file_write_and_wait_range(struct file *file, loff_t lstart, loff_t lend)
784 	if (lend < lstart)
788 		err = __filemap_fdatawrite_range(mapping, lstart, lend,
792 			__filemap_fdatawait_range(mapping, lstart, lend);