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Date:   Mon, 8 May 2023 22:02:27 -0700
From:   Eric Biggers <ebiggers@kernel.org>
To:     youling257 <youling257@gmail.com>
Cc:     jack@suse.cz, hch@infradead.org, hch@lst.de,
        linux-ext4@vger.kernel.org, ritesh.list@gmail.com, tytso@mit.edu
Subject: Re: [PATCH v4 12/13] ext4: Stop providing .writepage hook
Message-ID: <20230509050227.GA1180@quark.localdomain>
References: <20221207112722.22220-12-jack@suse.cz>
 <20230508175108.6986-1-youling257@gmail.com>
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On Tue, May 09, 2023 at 01:51:08AM +0800, youling257 wrote:
> I using linux mainline kernel on android. https://github.com/youling257/android-mainline/commits/6.4  https://github.com/youling257/android-mainline/commits/6.3
> "ext4: Stop providing .writepage hook" cause some android app unable to read storage/emulated/0 files, i need to say android esdfs file system storage/emulated is ext4 data/media bind mount.
> I want to ask, why android storage/emulated need .writepage hook?

"esdfs" doesn't exist upstream, so linux-ext4 can't provide support for it.

Also, it doesn't exist in the Android Common Kernels either, so the Android team
cannot help you either.

- Eric