static void flash_sync_page(Flash *s, int page) { int bdrv_sector, nb_sectors; QEMUIOVector iov; if (!s->bdrv || bdrv_is_read_only(s->bdrv)) { return; } bdrv_sector = (page * s->pi->page_size) / BDRV_SECTOR_SIZE; nb_sectors = DIV_ROUND_UP(s->pi->page_size, BDRV_SECTOR_SIZE); qemu_iovec_init(&iov, 1); qemu_iovec_add(&iov, s->storage + bdrv_sector * BDRV_SECTOR_SIZE, nb_sectors * BDRV_SECTOR_SIZE); bdrv_aio_writev(s->bdrv, bdrv_sector, &iov, nb_sectors, bdrv_sync_complete, NULL); }