linux-kernel - remove Xen tmem leftovers

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Message-Id: <20211224062246.1258487-1-hch@lst.de>
Date:   Fri, 24 Dec 2021 07:22:33 +0100
From:   Christoph Hellwig <hch@....de>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:     Hugh Dickins <hughd@...gle.com>,
        Seth Jennings <sjenning@...hat.com>,
        Dan Streetman <ddstreet@...e.org>,
        Vitaly Wool <vitaly.wool@...sulko.com>,
        Matthew Wilcox <willy@...radead.org>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org
Subject: remove Xen tmem leftovers

Hi all,

since the remove of the Xen tmem driver in 2019, the cleancache hooks are
entirely unused, as are large parts of frontswap.  This series against
linux-next (with the folio changes included) removes cleancaches, and cuts
down frontswap to the bits actually used by zswap.

Diffstat:
 Documentation/vm/cleancache.rst        |  296 -------------------------------
 b/Documentation/vm/frontswap.rst       |   31 ---
 b/Documentation/vm/index.rst           |    1 
 b/MAINTAINERS                          |    7 
 b/arch/arm/configs/bcm2835_defconfig   |    1 
 b/arch/arm/configs/qcom_defconfig      |    1 
 b/arch/m68k/configs/amiga_defconfig    |    1 
 b/arch/m68k/configs/apollo_defconfig   |    1 
 b/arch/m68k/configs/atari_defconfig    |    1 
 b/arch/m68k/configs/bvme6000_defconfig |    1 
 b/arch/m68k/configs/hp300_defconfig    |    1 
 b/arch/m68k/configs/mac_defconfig      |    1 
 b/arch/m68k/configs/multi_defconfig    |    1 
 b/arch/m68k/configs/mvme147_defconfig  |    1 
 b/arch/m68k/configs/mvme16x_defconfig  |    1 
 b/arch/m68k/configs/q40_defconfig      |    1 
 b/arch/m68k/configs/sun3_defconfig     |    1 
 b/arch/m68k/configs/sun3x_defconfig    |    1 
 b/arch/s390/configs/debug_defconfig    |    1 
 b/arch/s390/configs/defconfig          |    1 
 b/block/bdev.c                         |    5 
 b/fs/btrfs/extent_io.c                 |   10 -
 b/fs/btrfs/super.c                     |    2 
 b/fs/ext4/readpage.c                   |    6 
 b/fs/ext4/super.c                      |    3 
 b/fs/f2fs/data.c                       |    7 
 b/fs/mpage.c                           |    7 
 b/fs/ntfs3/ntfs_fs.h                   |    1 
 b/fs/ocfs2/super.c                     |    2 
 b/fs/super.c                           |    3 
 b/include/linux/frontswap.h            |   35 ---
 b/include/linux/fs.h                   |    5 
 b/include/linux/shmem_fs.h             |    3 
 b/include/linux/swapfile.h             |    3 
 b/mm/Kconfig                           |   40 ----
 b/mm/Makefile                          |    1 
 b/mm/filemap.c                         |   11 -
 b/mm/frontswap.c                       |  259 +--------------------------
 b/mm/shmem.c                           |   33 ---
 b/mm/swapfile.c                        |   90 ++-------
 b/mm/truncate.c                        |   15 -
 b/mm/zswap.c                           |    8 
 include/linux/cleancache.h             |  124 ------------
 mm/cleancache.c                        |  315 ---------------------------------
 44 files changed, 65 insertions(+), 1274 deletions(-)