linux-ext4 - Re: [PATCH v2 1/5] fs: add bdev writepage hook to block device

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Date:   Thu, 18 Jun 2020 00:02:51 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     "zhangyi (F)" <yi.zhang@...wei.com>
Cc:     linux-ext4@...r.kernel.org, tytso@....edu, jack@...e.cz,
        adilger.kernel@...ger.ca, zhangxiaoxu5@...wei.com,
        linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH v2 1/5] fs: add bdev writepage hook to block device

On Wed, Jun 17, 2020 at 07:59:43PM +0800, zhangyi (F) wrote:
> Add a new bdev_write_page hook into struct super_operations and called
> by bdev_writepage(), which could be used by filesystem to propagate
> private handlers.

Sorry. but no.  We've been trying to get the fs decoupled from the whole
buffer_head crap for quite a while, and this just makes it much worse.
Please don't add layering violations like this.