Re: [Drbd-dev] [PATCH drbd-9.0] compat: __vmalloc() pgprot argument was removed in v5.8

[Lukas Wunner <lukas@wunner.de>]

Hi Elimar,

my apologies for the delay.

On Mon, Oct 12, 2020 at 01:14:39PM +0200, Elimar Riesebieter wrote:
> * Lukas Wunner <lukas@wunner.de> [2020-10-12 02:54 +0200]:
> > If you're unsuccessful debugging the build failure on your own,
> > maybe you can upload your drbd build directory somewhere so I
> > can take a look.
> 
> https://lxtec.de/drbd/drbd_dkms_buildir_hsh_201012.tar.xz

If coccinelle is not available, drbd-kernel-compat/gen_compat_patch.sh
attempts to fetch the coccinelle-generated patch from the cloud by
sending a POST request to https://drbd.io:2020/api/v1/spatch/9.0.25-1
with the locally-generated compat.h.

Because the cloud service generates the patch for the release version
9.0.25-1 and not for your locally-patched source, you end up with a
patch which doesn't work.

The solution is to disable usage of the cloud service by setting the
environment variable SPAAS=false and adding coccinelle >= 1.0.8 to
the drbd-dkms package's prerequisites.  It's not safe to use the
cloud service if you apply custom patches to the source code.

I was unable to reproduce the issue because I built from the git repo
and gen_compat_patch.sh never uses the cloud service in that case.

HTH,

Lukas