linux-kernel - Re: add file system helpers that take kernel pointers for the init code v3

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Message-ID: <CAHk-=wgq8evViJD9Hnjugq=V0eUAn7K6ZjOP7P7qki-nOTx_jg@mail.gmail.com>
Date:   Sun, 26 Jul 2020 08:49:28 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Al Viro <viro@...iv.linux.org.uk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-raid@...r.kernel.org,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Linux API <linux-api@...r.kernel.org>
Subject: Re: add file system helpers that take kernel pointers for the init
 code v3

On Sun, Jul 26, 2020 at 12:14 AM Christoph Hellwig <hch@....de> wrote:
>
> Hi Al and Linus,
>
> currently a lot of the file system calls in the early in code (and the
> devtmpfs kthread) rely on the implicit set_fs(KERNEL_DS) during boot.
> This is one of the few last remaining places we need to deal with to kill
> off set_fs entirely, so this series adds new helpers that take kernel
> pointers.  These helpers are in init/ and marked __init and thus will
> be discarded after bootup.  A few also need to be duplicated in devtmpfs,
> though unfortunately.

I see nothing objectionable here.

The only bikeshed comment I have is that I think the "for_init.c" name
is ugly and pointless - I think you could just call it "fs/init.c" and
it's both simpler and more straightforward. It _is_ init code, it's
not "for" init.

Other than that it all looked straightforward to me.

                Linus