[PATCH v2 0/2 gnumach] Parallel SMP init with early gs access

[Damien Zammit via Bug reports for the GNU Hurd]

Hi,

These two patches complete smp parallel init by preserving early gs access,
and makes the cpus all wake concurrently.  Care has been taken so memory
is not trampled on by other cpus during startup.

Thanks,
Damien