------- Comment From vasily.gorbik@de.ibm.com 2023-03-27 09:58 EDT------- Looking at "last built kernel available under: https://download.opensuse.org/ports/zsystems/tumbleweed/repo/oss/s390x/kernel-default-6.2.6-1.1.s390x.rpm" It seems 6.2.6 has been built with gcc 12.2.1. Looking at the failed build logs for 6.2.8: [ 62s] [160/168] cumulate gcc13-13.0.1+git6669-1.1 [ 62s] [161/168] cumulate gcc13-PIE-13.0.1+git6669-1.1 are you trying to use unreleased gcc 13 for the build?