do not assume hardware has NCPU cores; use ncpu where it matters

6e31b597 · Nickolai Zeldovich · 07cc3f4f · 6e31b597 · 6e31b597
--- a/proc.cc
+++ b/proc.cc
@@ -76,7 +76,7 @@ migrate(struct proc *p)
  if (p == myproc())
    panic("migrate: myproc");

-  for (c = 0; c < NCPU; c++) {
+  for (c = 0; c < ncpu; c++) {
    if (c == mycpu()->id)
      continue;
    if (idle[c]) {    // OK if there is a race

--- a/sched.cc
+++ b/sched.cc
@@ -59,8 +59,8 @@ steal(void)

  pushcli();
  
-  for (i = 1; i < NCPU; i++) {
-    struct runq *q = &runq[(i+cpunum()) % NCPU];
+  for (i = 1; i < ncpu; i++) {
+    struct runq *q = &runq[(i+cpunum()) % ncpu];
    struct proc *p;

    // XXX(sbw) Look for a process to steal.  Acquiring q->lock