VMM - free_page deos not unset P2 entry if not asked to

src/kernel/memory/vmm.c

@@ -83,6 +83,8 @@ void free_page(void *P4, uintptr_t addr, int free)
     return;
   P1e(P4, addr).value = 0;
 
+  if(!free) return;
+
   union PTE *pt;
 
   pt = PT(P2e(P4, addr).value);

src/kernel/memory/vmm.tt

@@ -146,3 +146,12 @@ TEST(free_page_unsets_P2_entry_if_P1_is_empty)
 
   ASSERT_EQ_PTR(p2[3], 0);
 }
+TEST(free_page_does_not_unset_P2_entry_if_not_asked_to)
+{
+  BUILD_PT(1,2,3);
+  p1[4] = PAGE_PRESENT;
+
+  free_page(p4, ADDR1234, 0);
+
+  ASSERT_NEQ_PTR(p2[3], 0);
+}