This test was written very early. Spinlocks are required for SMP
implementation. They couldn't be tested in terms of it, so the test
used the low level MP API instead. But of course that breaks if SMP
is actually working and the CPU is already started.
No need for that now. Just spawn a thread like any other, and filter
the test to run only on SMP systems.
Fixes#19319
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Simple test of spinlock semantics. Bounce between two CPUs locking
and releasing, validating that nothing changes at unexpected times.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Andy Ross