lttng-modules: backport patches to fix build against 5.12+ kernel
There are four changes in addition to the 2.12.5 release that we
need to build against the 5.12 kernel. Rather than only rely on
people knowing to use devupstream support to build against newer
kernels, we backport the 4 patches while waiting for release.
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
