ubi_leb_write
err = ubi_leb_write(gluebi->desc, lnum, buf, offs, to_write);
EXPORT_SYMBOL_GPL(ubi_leb_write);
err = ubi_leb_write(c->ubi, lnum, buf, offs, len);
err = ubi_leb_write(c->ubi, lnum, buf, offs, len);
int ubi_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf,