diff --git a/qemu/exec.c b/qemu/exec.c
index 8b49d6b0..1bbddbb6 100644
--- a/qemu/exec.c
+++ b/qemu/exec.c
@@ -118,7 +118,7 @@ typedef struct subpage_t {
     MemoryRegion iomem;
     AddressSpace *as;
     hwaddr base;
-    uint16_t sub_section[TARGET_PAGE_SIZE];
+    uint16_t sub_section[];
 } subpage_t;
 
 #define PHYS_SECTION_UNASSIGNED 0
@@ -1673,7 +1673,7 @@ static subpage_t *subpage_init(AddressSpace *as, hwaddr base)
 {
     subpage_t *mmio;
 
-    mmio = g_malloc0(sizeof(subpage_t));
+    mmio = g_malloc0(sizeof(subpage_t) + TARGET_PAGE_SIZE * sizeof(uint16_t));
 
     mmio->as = as;
     mmio->base = base;
diff --git a/qemu/memory.c b/qemu/memory.c
index f6bd8f9f..16f1f050 100644
--- a/qemu/memory.c
+++ b/qemu/memory.c
@@ -1706,8 +1706,8 @@ bool memory_region_present(MemoryRegion *container, hwaddr addr)
     return mr && mr != container;
 }
 
-static void listener_add_address_space(MemoryListener *listener,
-                                       AddressSpace *as)
+static QEMU_UNUSED_FUNC void listener_add_address_space(MemoryListener *listener,
+                                                        AddressSpace *as)
 {
     FlatView *view;
     FlatRange *fr;