From mboxrd@z Thu Jan  1 00:00:00 1970
From: jbernard@debian.org (Jon Bernard)
Date: Fri, 24 Apr 2015 12:59:35 -0400
Subject: [lttng-dev] Debian 3.16.7-ckt9-2 issue with lttng-modules kmem
	probe
In-Reply-To: <844104542.35292.1429823245769.JavaMail.zimbra@efficios.com>
References: <1082981755.35270.1429823095435.JavaMail.zimbra@efficios.com>
 <844104542.35292.1429823245769.JavaMail.zimbra@efficios.com>
Message-ID: <20150424165935.GA5843@helmut>

* Mathieu Desnoyers <mathieu.desnoyers at efficios.com> wrote:
> Hi Jon,
> 
> It appears that lttng-modules cannot build on the
> Debian kernel 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt9-2 (2015-04-13)
> x86_64 GNU/Linux.
> 
> It appears that their exported kmem.h header differs from
> the upstream stable branch, but AFAIK there is no Debian-specific
> version number available to distinguish between upstream stable
> and the Debian kernel.

Indeed.  The only distinguishing characteristic I see is EXTRAVERSION
defined to '-ckt9'.  I haven't had a chance to try yet, but could that
be acceptable?

> We have been hit by this in the past for Ubuntu kernels, and the
> solution has been to introduce a UTS_UBUNTU_RELEASE_ABI define
> into their kernels, which can be used to follow their own kernel
> versions.
> 
> Do you think we could ask Debian to do the same ?

I'm happy to ask, the argument is certainly sound.

-- 
Jon