linux-kernel - [PATCH v2 0/2] Adds support to capture module's SCM version

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Date:   Wed, 25 Nov 2020 01:05:39 +0000
From:   Will McVicker <willmcvicker@...gle.com>
To:     Jessica Yu <jeyu@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Christoph Hellwig <hch@...radead.org>,
        Saravana Kannan <saravanak@...gle.com>,
        linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
        kernel-team@...roid.com, Will McVicker <willmcvicker@...gle.com>
Subject: [PATCH v2 0/2] Adds support to capture module's SCM version

Hi All,

I have updated the patchset to:

 *) Include Documentation.
 *) Use a consistent output pattern for the SCM version.

In my debugging, I found that the vermagic reported by modinfo can actually
vary based on how the module was loaded. For example, if you have a module in
the initramfs that is newer than the module on disk, then the initramfs module
will be loaded (not the one on disk) during boot. Then, when you run the
command:

  $ modinfo MODULENAME

The vermagic returned will actually be the vermagic of the module on disk and
not the one in the initramfs which was actually loaded. With that being said,
adding this scmversion attribute ensures that you can *always* get the correct
SCM version of the module that loaded.

Please take a look at the updated patch and provide any comments you find.

Thanks,
Will

Will McVicker (2):
  scripts/setlocalversion: allow running in a subdir
  modules: add scmversion field

 Documentation/ABI/stable/sysfs-module | 17 +++++++++++++++++
 include/linux/module.h                |  1 +
 kernel/module.c                       |  2 ++
 scripts/Makefile.modpost              | 20 ++++++++++++++++++++
 scripts/mod/modpost.c                 | 24 +++++++++++++++++++++++-
 scripts/setlocalversion               |  5 ++---
 6 files changed, 65 insertions(+), 4 deletions(-)

-- 
2.29.2.454.gaff20da3a2-goog