linux-ext4 - [PATCH v4 12/13] ext4: Stop providing .writepage hook

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Message-Id: <20230508175108.6986-1-youling257@gmail.com>
Date:   Tue,  9 May 2023 01:51:08 +0800
From:   youling257 <youling257@...il.com>
To:     jack@...e.cz
Cc:     hch@...radead.org, hch@....de, linux-ext4@...r.kernel.org,
        ritesh.list@...il.com, tytso@....edu
Subject: [PATCH v4 12/13] ext4: Stop providing .writepage hook

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?