From `linux-ppc64le-buildlet` (https://build.golang.org/log/1e46452b18adf5f3b2ec28dfcee7bc28bf55be10): ``` --- FAIL: TestSchedSetaffinity (0.00s) syscall_linux_test.go:366: SchedSetaffinity: invalid argument FAIL FAIL golang.org/x/sys/unix 0.568s ``` See previously #27875. CC @tklauser @laboger