__es_remove_extent
err = __es_remove_extent(inode, lblk, end, status, NULL,
err = __es_remove_extent(inode, lblk, end, 0, &reserved, NULL, es);
static int __es_remove_extent(struct inode *inode, ext4_lblk_t lblk,
err1 = __es_remove_extent(inode, lblk, end, 0, NULL, NULL, es1);
err1 = __es_remove_extent(inode, lblk, end, 0, &resv_used, NULL, es1);