From: Gustavo Luiz Duarte on
gitlab.com
https://gitlab.com/cki-project/kernel-ark/-/merge_requests/560#note_51753...
FWIW, I contacted the powerpc upstream maintainer and we agree that
CONFIG_PPC_QUEUED_SPINLOCKS should be enabled in Fedora and RHEL9. It is
on by default in mainline now.