flash->page_size = ((ext_jedec == 0x4d00) ? 512 : 256) << flash->shift;
flash->sector_size = params->sector_size << flash->shift;
flash->size = flash->sector_size * params->nr_sectors << flash->shift;
+#ifdef CONFIG_SF_DUAL_FLASH
if (flash->dual_flash & SF_DUAL_STACKED_FLASH)
flash->size <<= 1;
+#endif
/* Compute erase sector and command */
if (params->flags & SECT_4K) {