linux-kernel - Re: [PATCH v5 12/24] erofs: introduce tagged pointer

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Message-ID: <e2f2c550-8d1f-39f5-3bd9-b6de996da9ad@huawei.com>
Date:   Wed, 31 Jul 2019 21:52:51 +0800
From:   Gao Xiang <gaoxiang25@...wei.com>
To:     Jan Kara <jack@...e.cz>
CC:     Alexander Viro <viro@...iv.linux.org.uk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Theodore Ts'o <tytso@....edu>,
        "David Sterba" <dsterba@...e.cz>,
        Amir Goldstein <amir73il@...il.com>,
        "Christoph Hellwig" <hch@...radead.org>,
        "Darrick J . Wong" <darrick.wong@...cle.com>,
        Dave Chinner <david@...morbit.com>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        "Linus Torvalds" <torvalds@...ux-foundation.org>,
        <linux-fsdevel@...r.kernel.org>, <devel@...verdev.osuosl.org>,
        LKML <linux-kernel@...r.kernel.org>,
        <linux-erofs@...ts.ozlabs.org>, Chao Yu <yuchao0@...wei.com>,
        Miao Xie <miaoxie@...wei.com>,
        Li Guifu <bluce.liguifu@...wei.com>,
        Fang Wei <fangwei1@...wei.com>
Subject: Re: [PATCH v5 12/24] erofs: introduce tagged pointer



On 2019/7/31 21:20, Gao Xiang wrote:
>    struct b *ptr = tagptr_unfold_tags(tptr);
> vs
>    struct b *ptr = (struct b *)((unsigned long)tptr & ~2);

Sorry ... a too stupid typo issue, I mean....

struct b *ptr = tagptr_unfold_ptr(tptr);
vs
struct b *ptr = (struct b *)((unsigned long)tptr & ~3);

Thanks,
Gao Xiang