ci: use prebuilt Linux kernel binaries for Gentoo container

Also remove dmsetup. It does not build and it is not required for ci.

diff --git a/test/container/Dockerfile-Gentoo b/test/container/Dockerfile-Gentoo
index 4c2669cc004fc7b36a6e47a60c65ac31a8b6915a..2c741064b3ead3dce154b8ca8d108c35578d67c3 100644 (file)
--- a/test/container/Dockerfile-Gentoo
+++ b/test/container/Dockerfile-Gentoo
@@ -3,7 +3,7 @@ FROM docker.io/gentoo/portage:latest as portage
 # kernel and its dependencies in a separate builder
 FROM docker.io/gentoo/stage3:musl as kernel
 COPY --from=portage /var/db/repos/gentoo /var/db/repos/gentoo
-RUN emerge -qv virtual/dist-kernel
+RUN emerge -qv sys-kernel/gentoo-kernel-bin
 
 FROM docker.io/gentoo/stage3:musl
 COPY --from=portage /var/db/repos/gentoo /var/db/repos/gentoo