multi-cpu scheduling WIP

kernel/proc/mutex.c

@@ -6,6 +6,8 @@
 #include <proc/proc.h>
 #include <sync/spin_lock.h>
 #include <sys/debug.h>
+#include <sys/smp.h>
+#include <sys/spin_lock.h>
 
 bool proc_create_resource_mutex (struct proc_mutex* mutex) {
   memset (mutex, 0, sizeof (*mutex));
@@ -34,6 +36,8 @@ static void proc_mutex_suspend (struct proc* proc, struct proc_suspension_q* sq,
   proc->suspension_q = sq;
 
   list_remove (cpu->proc_run_q, &proc->cpu_run_q_link);
+  atomic_fetch_sub (&cpu->proc_run_q_count, 1);
+
   if (cpu->proc_current == proc)
     cpu->proc_current = NULL;
 
@@ -64,6 +68,7 @@ static void proc_mutex_resume (struct proc* proc) {
     atomic_store (&proc->state, PROC_READY);
 
     list_append (cpu->proc_run_q, &proc->cpu_run_q_link);
+    atomic_fetch_add (&cpu->proc_run_q_count, 1);
 
     spin_unlock (&sq->lock, &ctxsq);
   }