TCMU_MBS_TO_PAGES
data_size = TCMU_MBS_TO_PAGES(udev->data_area_mb) << PAGE_SHIFT;
tcmu_global_max_pages = TCMU_MBS_TO_PAGES(max_area_mb);
if (TCMU_MBS_TO_PAGES(val) < pages_per_blk) {
val, TCMU_MBS_TO_PAGES(val), pages_per_blk);
udev->max_blocks = TCMU_MBS_TO_PAGES(val) / pages_per_blk;
if (val > TCMU_MBS_TO_PAGES(udev->data_area_mb)) {
TCMU_MBS_TO_PAGES(udev->data_area_mb));
udev->max_blocks = TCMU_MBS_TO_PAGES(udev->data_area_mb) / val;