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Date: Fri, 18 Dec 2020 13:01:38 +0100 From: Jessica Yu <jeyu@...nel.org> To: Will McVicker <willmcvicker@...gle.com> Cc: Masahiro Yamada <masahiroy@...nel.org>, Michal Marek <michal.lkml@...kovi.net>, 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 Subject: Re: [PATCH v4] modules: introduce the MODULE_SCMVERSION config +++ Will McVicker [16/12/20 22:08 +0000]: >Config MODULE_SCMVERSION introduces a new module attribute -- >`scmversion` -- which can be used to identify a given module's SCM >version. This is very useful for developers that update their kernel >independently from their kernel modules or vice-versa since the SCM >version provided by UTS_RELEASE (`uname -r`) will now differ from the >module's vermagic attribute. > >For example, we have a CI setup that tests new kernel changes on the >hikey960 and db845c devices without updating their kernel modules. When >these tests fail, we need to be able to identify the exact device >configuration the test was using. By including MODULE_SCMVERSION, we can >identify the exact kernel and modules' SCM versions for debugging the >failures. > >Additionally, by exposing the SCM version via the sysfs node >/sys/module/MODULENAME/scmversion, one can also verify the SCM versions >of the modules loaded from the initramfs. Currently, modinfo can only >retrieve module attributes from the module's ko on disk and not from the >actual module that is loaded in RAM. > >You can retrieve the SCM version in two ways, > >1) By using modinfo: > > modinfo -F scmversion MODULENAME >2) By module sysfs node: > > cat /sys/module/MODULENAME/scmversion > >Signed-off-by: Will McVicker <willmcvicker@...gle.com> Hi Will, thanks for v4. I'm on vacation for the next two weeks and with the current merge window almost over, I hope it'd be OK with you if we revisit this early January. Just wanted to give you a heads up. Thanks and happy holidays! Jessica
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