topology: make core_mask include at least cluster_siblings
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2047951
Ampere Altra defines CPU clusters in the ACPI PPTT. They share a Snoop Control Unit, but have no shared CPU-side last level cache. This leads to topology confusion and this message at boot:
BUG: arch topology borken
This patch just landed 5.18-rc7 to correct the problem.
Signed-off-by: Mark Salter msalter@redhat.com
Edited by Mark Salter