Revert "Merging in 1.0.2."

This reverts commit 50cf3276e7.

kern/arch/mips/vm/dumbvm.c

@@ -126,6 +126,21 @@ free_kpages(vaddr_t addr)
 	(void)addr;
 }
 
+unsigned
+int
+coremap_used_bytes() {
+
+	/* dumbvm doesn't track page allocations. Return 0 so that khu works. */
+
+	return 0;
+}
+
+void
+vm_tlbshootdown_all(void)
+{
+	panic("dumbvm tried to do tlb shootdown?!\n");
+}
+
 void
 vm_tlbshootdown(const struct tlbshootdown *ts)
 {