Unexpected warning: SIGSEGV handler flags expected:SA_RESTART|SA_SIGINFO found:SA_RESTART|SA_SIGINFO

After JDK-8253742: "POSIX signal code cleanup" we are seeing unexpected warnings generated by the VM for all the key signals e.g.

Warning: SIGSEGV handler flags expected:SA_RESTART|SA_SIGINFO found:SA_RESTART|SA_SIGINFO

Note that what was expected and what was found appear to be the same at this level, but that is likely an artifact of how we print human readable strings for the flags.

The only change I can see that relates to the flags is the removal of the SIGNIFICANT_SIGNAL_MASK.