Pad and align percpu array elements

eae2f4cc · Silas Boyd-Wickizer · 8be977ab · eae2f4cc · eae2f4cc
--- a/include/percpu.hh
+++ b/include/percpu.hh
-struct pad {
-  __padout__;
-} __mpalign__;
-
 template <typename T>
 struct percpu {
  int myid() {
@@ -25,8 +21,11 @@ struct percpu {
  }

  T* cpu(int id) {
-    return &v_[id];
+    return &pad_[id].v_;
  }

-  T v_[NCPU] __mpalign__;
+  struct {
+    T v_ __mpalign__;
+    __padout__;
+  } pad_[NCPU];
 };
--- a/kernel/idle.cc
+++ b/kernel/idle.cc
@@ -8,7 +8,7 @@
 #include "sched.hh"
 #include "percpu.hh"

-struct idle : public pad {
+struct idle {
  struct proc *cur;
  struct proc *heir;
  SLIST_HEAD(zombies, proc) zombies;