linux-kernel - Re: [RFC PATCH v3 00/13] module: core code clean up

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Date:   Fri, 28 Jan 2022 23:22:43 +0100
From:   Oleksandr Natalenko <oleksandr@...alenko.name>
To:     mcgrof@...nel.org, Aaron Tomlin <atomlin@...hat.com>
Cc:     cl@...ux.com, pmladek@...e.com, mbenes@...e.cz,
        akpm@...ux-foundation.org, jeyu@...nel.org,
        linux-kernel@...r.kernel.org, linux-modules@...r.kernel.org,
        live-patching@...r.kernel.org, atomlin@...mlin.com,
        ghalat@...hat.com, allen.lkml@...il.com
Subject: Re: [RFC PATCH v3 00/13] module: core code clean up

Hello.

On pátek 28. ledna 2022 21:39:21 CET Aaron Tomlin wrote:
> Hi Luis,
> 
> [Note: Cc'd live-patching for feedback on livepatch specific changes]
> 
> Firstly, apologies for the delay.
> 
> As per your suggestion [1], this is an attempt to refactor and split
> optional code out of core module support code into separate components.
> This version is based on branch mcgrof/modules-next since a97ac8cb24a3/or
> modules-5.17-rc1. Please let me know your thoughts.
> 
> Changes since v1 [2]:
> 
>   - Moved module version support code into a new file
> 
> Changes since v2 [3]:
> 
>  - Move module decompress support to a separate file
>  - Make check_modinfo_livepatch() generic (Petr Mladek)
>  - Remove filename from each newly created file (Luis Chamberlain)
>  - Addressed some (i.e. --ignore=ASSIGN_IN_IF,AVOID_BUG was used)
>    minor scripts/checkpatch.pl concerns e.g., use strscpy over
>    strlcpy and missing a blank line after declarations (Allen)

Thanks for your submission.

Aaron, could you please also include stats from `./scripts/bloat-o-meter` to compare `vmlinux` sections size before and after your modifications?

> [1]: https://lore.kernel.org/lkml/YbEZ4HgSYQEPuRmS@bombadil.infradead.org/
> [2]: https://lore.kernel.org/lkml/20211228213041.1356334-1-atomlin@redhat.com/
> [3]: https://lore.kernel.org/lkml/20220106234319.2067842-1-atomlin@redhat.com/
> 
> 
> Aaron Tomlin (13):
>   module: Move all into module/
>   module: Simple refactor in preparation for split
>   module: Move livepatch support to a separate file
>   module: Move latched RB-tree support to a separate file
>   module: Move arch strict rwx support to a separate file
>   module: Move strict rwx support to a separate file
>   module: Move extra signature support out of core code
>   module: Move kmemleak support to a separate file
>   module: Move kallsyms support into a separate file
>   module: Move procfs support into a separate file
>   module: Move sysfs support into a separate file
>   module: Move kdb_modules list out of core code
>   module: Move version support into a separate file
> 
>  MAINTAINERS                                   |    2 +-
>  include/linux/module.h                        |   92 +-
>  kernel/Makefile                               |    5 +-
>  kernel/debug/kdb/kdb_main.c                   |    5 +
>  kernel/module-internal.h                      |   50 -
>  kernel/module/Makefile                        |   18 +
>  kernel/module/arch_strict_rwx.c               |   44 +
>  kernel/module/debug_kmemleak.c                |   30 +
>  .../decompress.c}                             |    2 +-
>  kernel/module/internal.h                      |  202 ++
>  kernel/module/kallsyms.c                      |  502 +++++
>  kernel/module/livepatch.c                     |   74 +
>  kernel/{module.c => module/main.c}            | 1879 +----------------
>  kernel/module/procfs.c                        |  142 ++
>  .../signature.c}                              |    0
>  kernel/module/signing.c                       |  120 ++
>  kernel/module/strict_rwx.c                    |   83 +
>  kernel/module/sysfs.c                         |  425 ++++
>  kernel/module/tree_lookup.c                   |  108 +
>  kernel/module/version.c                       |  110 +
>  kernel/module_signing.c                       |   45 -
>  21 files changed, 2032 insertions(+), 1906 deletions(-)
>  delete mode 100644 kernel/module-internal.h
>  create mode 100644 kernel/module/Makefile
>  create mode 100644 kernel/module/arch_strict_rwx.c
>  create mode 100644 kernel/module/debug_kmemleak.c
>  rename kernel/{module_decompress.c => module/decompress.c} (99%)
>  create mode 100644 kernel/module/internal.h
>  create mode 100644 kernel/module/kallsyms.c
>  create mode 100644 kernel/module/livepatch.c
>  rename kernel/{module.c => module/main.c} (63%)
>  create mode 100644 kernel/module/procfs.c
>  rename kernel/{module_signature.c => module/signature.c} (100%)
>  create mode 100644 kernel/module/signing.c
>  create mode 100644 kernel/module/strict_rwx.c
>  create mode 100644 kernel/module/sysfs.c
>  create mode 100644 kernel/module/tree_lookup.c
>  create mode 100644 kernel/module/version.c
>  delete mode 100644 kernel/module_signing.c
> 
> 
> base-commit: a97ac8cb24a3c3ad74794adb83717ef1605d1b47
> 


-- 
Oleksandr Natalenko (post-factum)