This conflicted with and seems to be redundant with "sched/core: Fix
illegal RCU from offline CPUs". I think the previous resolution of
this conflict can result in a double free.
Refresh patch "pci/switchtec: Don't use completion's wait queue" which was
already done as well in previous rt patchset, due to context changes in
4.19.116 caused by 12ce9fd7fc87 ("PCI/switchtec: Fix init_completion race
condition with poll_wait()").