Hi, does ReactOS support x86 multiprocessor completely for now?

[Xiaoming Gao]

Hello everyone
   I'm a new comer,i'm reading the kernel source ,but i found that "jz
NotBusy " in ctxswitch.S (line 351),the NotBusy label is not defined.I have
searched the whole source code,but not found it. So, would someone tell me
some information about this?