linux-kernel - Re: [PATCH 1/2] init: split get_fs

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Message-ID: <20210621145309.GA4995@lst.de>
Date:   Mon, 21 Jun 2021 16:53:09 +0200
From:   Christoph Hellwig <hch@....de>
To:     Al Viro <viro@...iv.linux.org.uk>
Cc:     Christoph Hellwig <hch@....de>, Vivek Goyal <vgoyal@...hat.com>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        virtio-fs@...hat.com
Subject: Re: [PATCH 1/2] init: split get_fs_names

On Mon, Jun 21, 2021 at 02:46:37PM +0000, Al Viro wrote:
> TBH, I would rather take that one into fs/filesystems.c.  Rationale:
> get_filesystem_list(), for all its resemblance to /proc/filesystems
> contents, is used only by init/*.c and it's not a big deal to make
> it

Yeah, unwinding this mess actually is a good idea.  I didn't really
look outside of do_mounts.c, but once doing that it becomes completely
obvious.

> int __init get_filesystem_list(char *buf, bool is_dev)

As-is we don't even really need the is_dev argument, as the only
callers wants block device file systems anyway.  In fact it would
much rather have a cursor based iteration so that we can skip the
allocation, but that is probaby overengineering the problem.