[Kgdb-bugreport] Fix connect failed

[Amit K. <ami...@li...>]

Hi,

Attached patch fixes connection failed errors (E22) and the ?? gdb shows on an 
early connect from kgdbwait.

smp_num_cpus() returns a 0 before smp framework is initialized. This causes 
kgdb shadow thread logic to go heywire, resulting in kgdb refusing to return 
registers of the initial thread reported as id 0x8000. This is seen as gdb 
showing the control to be at an unknown location (??) or a connection failed 
error with E22 as the error code. Attached patch fixes this by checking 
whether smp_num_cpus returns non-zero and proceeds for shadow threads only if 
it does.
-- 
Amit Kale
LinSysSoft Technologies
Ask me about KGDB Pro
http://www.linsyssoft.com/Kgdbpro.html