Reverting "powerpc/64/signal: Balance return predictor stack in signal trampoline" gets the test passing, so that does appear to be the cause. I'm not sure what needs to happen here to resolve the test failure though.
Reverting "powerpc/64/signal: Balance return predictor stack in signal trampoline" gets the test passing, so that does appear to be the cause. I'm not sure what needs to happen here to resolve the test failure though.