CS8 kernels needs a patch from upstream OpenAFS (https://gerrit.openafs.org/#/c/14248/) that has not yet landed in a release. Upstream ticket: https://rt.central.org/rt/Ticket/Display.html?id=135209 Build error looks like
/builds/linuxsupport/rpms/openafs/build/BUILD/openafs-1.8.7/src/libafs/MODLOAD-4.18.0-277.el8.x86_64-SP/osi_vfsops.c:124:14: error: 'struct backing_dev_info' has no member named 'name'
3164 sb->s_bdi->name = "openafs";