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

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Date:   Fri, 4 Dec 2020 18:18:08 +0000
From:   Christoph Hellwig <hch@...radead.org>
To:     Will McVicker <willmcvicker@...gle.com>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Jessica Yu <jeyu@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Saravana Kannan <saravanak@...gle.com>,
        linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
        kernel-team@...roid.com
Subject: Re: [PATCH v2 0/2] Adds support to capture module's SCM version

On Fri, Dec 04, 2020 at 10:13:56AM -0800, Will McVicker wrote:
> On Fri, Dec 04, 2020 at 07:51:59AM +0000, Christoph Hellwig wrote:
> > I think your decription still shows absolutely no benefit for the
> > kernel, so I'not sure why anyone would want to waste time on this.
> Hi Christoph,
> 
> Did you get a chance to read my earlier responses regarding the uses for
> in-tree modules?
> 
> The biggest benefit for the upstream community is being about to get the SCM
> version for *any* module (including in-tree modules) in the initramfs via the
> sysfs node. Currently there is no way to do that and there is no guarantee that

That assumes the SCM version of a module has any kind of meaning for
an in-tree module.  Which it doesn't.  If you care about the SCM version
of an in-tree module the only thing we need is one single global sysfs
file.