linux-imx

}

​

static int cgwb_bdi_init(struct backing_dev_info *bdi)

{

    int ret;

​

    INIT_RADIX_TREE(&bdi->cgwb_tree, GFP_ATOMIC);

    bdi->cgwb_congested_tree = RB_ROOT;

    mutex_init(&bdi->cgwb_release_mutex);

​

    ret = wb_init(&bdi->wb, bdi, 1, GFP_KERNEL);

    if (!ret) {

        bdi->wb.memcg_css = &root_mem_cgroup->css;

        bdi->wb.blkcg_css = blkcg_root_css;

    }

    return ret;

}

​

static void cgwb_bdi_unregister(struct backing_dev_info *bdi)