SMP - CPU local run queues

- each CPU has its own runqueues

- processes on BSP are put on the runqueues later after a switch to
  the final stack when cpuid works to avoid special cases

- enqueue() and dequeue() use the run queues of the cpu the process is
  assigned to

- pick_proc() uses the local run queues

- printing of per-CPU run queues ('2') on serial console

kernel/cpulocals.h

@@ -5,6 +5,7 @@
 #ifndef __ASSEMBLY__
 
 #include "kernel.h"
+#include "proc.h"
 
 #ifdef CONFIG_SMP
 
@@ -68,6 +69,10 @@ DECLARE_CPULOCAL(int, pagefault_handled);
  */
 DECLARE_CPULOCAL(struct proc *, ptproc);
 
+/* CPU private run queues */
+DECLARE_CPULOCAL(struct proc *, run_q_head[NR_SCHED_QUEUES]); /* ptrs to ready list headers */
+DECLARE_CPULOCAL(struct proc *, run_q_tail[NR_SCHED_QUEUES]); /* ptrs to ready list tails */
+
 DECLARE_CPULOCAL_END
 
 #endif /* __ASSEMBLY__ */