[PATCH 0/5] lib: zstd: allow use in PBL and shell

[Ahmad Fatoum]

So far, zstd use was only possible from squashfs and ubifs.
Give it an update and add the necessary hooks to have it usable
everywhere where LZO and friends can be used. zstd would've
been a good default for barebox proper compression, but unfortunately,
the decompressor going into the PBL would be quite big:

                        lz4    lzo    gzip   xz     zstd   uncompressed
thumb2 barebox proper   671K   614K   544K   456K   531K   1022K
thumb2 barebox PBL       10K    10K    18K    17K    41K   9K   
RIoTboard FDT            12K    11K     9K     7K     8K   39K
total thumb2 image      693K   635K   571K   480K   580K   974K

So, don't touch the defaults for now.

Series applies on top of
https://lore.barebox.org/barebox/20220713095730.1878941-1-a.fatoum@pengutronix.de/T/#t

Ahmad Fatoum (5):
  lib: zstd: adopt Linux directory structure
  lib: zstd: sync with Linux
  decompressor: define macros for non-PBL case as well
  ARM: cpu: uncompress: increase early malloc pool to 256K
  lib: uncompress: add general zstd support

 arch/arm/include/asm/barebox-arm.h            |    2 +-
 common/bootm.c                                |    8 +
 common/filetype.c                             |    4 +
 fs/squashfs/zstd_wrapper.c                    |    4 +-
 fs/ubifs/ubifs.c                              |    4 +-
 include/filetype.h                            |    2 +
 include/linux/decompress/mm.h                 |   11 +-
 include/linux/decompress/unzstd.h             |   11 +
 include/linux/limits.h                        |    1 +
 include/linux/zstd.h                          | 1252 ++------
 include/linux/zstd_errors.h                   |   77 +
 include/linux/zstd_lib.h                      | 2432 ++++++++++++++++
 lib/Makefile                                  |    1 +
 lib/decompress_unzstd.c                       |  351 +++
 lib/uncompress.c                              |    6 +
 lib/zstd/Makefile                             |   27 +-
 lib/zstd/bitstream.h                          |  374 ---
 lib/zstd/common/bitstream.h                   |  437 +++
 lib/zstd/common/compiler.h                    |  177 ++
 lib/zstd/common/cpu.h                         |  194 ++
 lib/zstd/common/debug.c                       |   24 +
 lib/zstd/common/debug.h                       |  101 +
 lib/zstd/common/entropy_common.c              |  357 +++
 lib/zstd/common/error_private.c               |   56 +
 lib/zstd/common/error_private.h               |   69 +
 lib/zstd/common/fse.h                         |  710 +++++
 lib/zstd/common/fse_decompress.c              |  390 +++
 lib/zstd/common/huf.h                         |  356 +++
 lib/zstd/common/mem.h                         |  259 ++
 lib/zstd/common/zstd_common.c                 |   83 +
 lib/zstd/common/zstd_deps.h                   |  125 +
 lib/zstd/common/zstd_internal.h               |  450 +++
 lib/zstd/decompress.c                         | 2528 -----------------
 lib/zstd/decompress/huf_decompress.c          | 1206 ++++++++
 lib/zstd/decompress/zstd_ddict.c              |  241 ++
 lib/zstd/decompress/zstd_ddict.h              |   44 +
 lib/zstd/decompress/zstd_decompress.c         | 2085 ++++++++++++++
 lib/zstd/decompress/zstd_decompress_block.c   | 1540 ++++++++++
 lib/zstd/decompress/zstd_decompress_block.h   |   62 +
 .../decompress/zstd_decompress_internal.h     |  202 ++
 lib/zstd/decompress_sources.h                 |   28 +
 lib/zstd/entropy_common.c                     |  243 --
 lib/zstd/error_private.h                      |   53 -
 lib/zstd/fse.h                                |  575 ----
 lib/zstd/fse_decompress.c                     |  332 ---
 lib/zstd/huf.h                                |  212 --
 lib/zstd/huf_decompress.c                     |  960 -------
 lib/zstd/mem.h                                |  151 -
 lib/zstd/zstd_common.c                        |   75 -
 lib/zstd/zstd_decompress_module.c             |  105 +
 lib/zstd/zstd_internal.h                      |  263 --
 lib/zstd/zstd_opt.h                           | 1014 -------
 pbl/Kconfig                                   |    4 +
 pbl/decomp.c                                  |    4 +
 scripts/Makefile.lib                          |   29 +
 55 files changed, 12538 insertions(+), 7773 deletions(-)
 create mode 100644 include/linux/decompress/unzstd.h
 create mode 100644 include/linux/zstd_errors.h
 create mode 100644 include/linux/zstd_lib.h
 create mode 100644 lib/decompress_unzstd.c
 delete mode 100644 lib/zstd/bitstream.h
 create mode 100644 lib/zstd/common/bitstream.h
 create mode 100644 lib/zstd/common/compiler.h
 create mode 100644 lib/zstd/common/cpu.h
 create mode 100644 lib/zstd/common/debug.c
 create mode 100644 lib/zstd/common/debug.h
 create mode 100644 lib/zstd/common/entropy_common.c
 create mode 100644 lib/zstd/common/error_private.c
 create mode 100644 lib/zstd/common/error_private.h
 create mode 100644 lib/zstd/common/fse.h
 create mode 100644 lib/zstd/common/fse_decompress.c
 create mode 100644 lib/zstd/common/huf.h
 create mode 100644 lib/zstd/common/mem.h
 create mode 100644 lib/zstd/common/zstd_common.c
 create mode 100644 lib/zstd/common/zstd_deps.h
 create mode 100644 lib/zstd/common/zstd_internal.h
 delete mode 100644 lib/zstd/decompress.c
 create mode 100644 lib/zstd/decompress/huf_decompress.c
 create mode 100644 lib/zstd/decompress/zstd_ddict.c
 create mode 100644 lib/zstd/decompress/zstd_ddict.h
 create mode 100644 lib/zstd/decompress/zstd_decompress.c
 create mode 100644 lib/zstd/decompress/zstd_decompress_block.c
 create mode 100644 lib/zstd/decompress/zstd_decompress_block.h
 create mode 100644 lib/zstd/decompress/zstd_decompress_internal.h
 create mode 100644 lib/zstd/decompress_sources.h
 delete mode 100644 lib/zstd/entropy_common.c
 delete mode 100644 lib/zstd/error_private.h
 delete mode 100644 lib/zstd/fse.h
 delete mode 100644 lib/zstd/fse_decompress.c
 delete mode 100644 lib/zstd/huf.h
 delete mode 100644 lib/zstd/huf_decompress.c
 delete mode 100644 lib/zstd/mem.h
 delete mode 100644 lib/zstd/zstd_common.c
 create mode 100644 lib/zstd/zstd_decompress_module.c
 delete mode 100644 lib/zstd/zstd_internal.h
 delete mode 100644 lib/zstd/zstd_opt.h

-- 
2.30.2