On Wed, 2014-07-09 at 18:27 +0800, tiger...@via-alliance.com wrote: > Hi, Scott: > > I have a question about nand_scan_bbt() function in > drivers/mtd/nand/nand_bbt.c . > > …… > > len = (1 << this->bbt_erase_shift); // bbt_erase_shift = 18 > (256KB) > > len += (len >> this->page_shift) * mtd->oobsize; > > buf = vmalloc(len); > > …… > > > > Why does it need to allocate “1 block size + all pages’ oob size in > this block” . > > It seems other functions called in nand_scan_bbt() only needs a small > buf (“one page size + its oob size”).
read_bbt() appears to operate one block at a time. This code comes from Linux, so linux-mtd may be a better place to ask questions about it. -Scott _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
