Comment # 17 on bug 1224402 from Michal Suchanek

(In reply to Stefan Dirsch from comment #16)
> Which warning do you mean exactly?

The one shown in the bug title which is displayed every time the package is
installed on the user's system and builds the kernel modules.

This part of the conftest.sh ends up in the generated code, confuses gcc which
fails to eliminate some dead code which then confuses objtool.