I think I find a bug in ext3/dir.c

["guomingyang" <guomingyang@xxxxxxxxxxxx>]

Hello everyone

I think I find a bug in ext3_readdir

if (err > 0) {
			page_cache_readahead(sb->s_bdev->bd_inode->i_mapping,
				&filp->f_ra,
				filp,
				map_bh.b_blocknr >>
					(PAGE_CACHE_SHIFT - inode->i_blkbits),
				1);
			bh = ext3_bread(NULL, inode, blk, 0, &err);
		}
map_bh.b_blocknr is the physical number of a block, but page_cache_readahead need a file-relative block number, am I right?

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