diff --git a/mm/internal.h b/mm/internal.h
index cb0af847d7d9..f60c1edb2e02 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -1233,7 +1233,17 @@ static inline void vunmap_range_noflush(unsigned long start, unsigned long end)
 #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
 DECLARE_STATIC_KEY_TRUE(deferred_pages);
 
+static inline bool deferred_pages_enabled(void)
+{
+	return static_branch_unlikely(&deferred_pages);
+}
+
 bool __init deferred_grow_zone(struct zone *zone, unsigned int order);
+#else
+static inline bool deferred_pages_enabled(void)
+{
+	return false;
+}
 #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */
 
 void init_deferred_page(unsigned long pfn, int nid);
diff --git a/mm/memblock.c b/mm/memblock.c
index df4e3475fe39..6cf1de7a0dac 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -900,6 +900,11 @@ static unsigned long __free_reserved_area(phys_addr_t start, phys_addr_t end,
 {
 	unsigned long pages = 0, pfn;
 
+	if (deferred_pages_enabled()) {
+		WARN(1, "Cannot free reserved memory because of deferred initialization of the memory map");
+		return 0;
+	}
+
 	for_each_valid_pfn(pfn, PFN_UP(start), PFN_DOWN(end)) {
 		struct page *page = pfn_to_page(pfn);
 		void *direct_map_addr;
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index df3d61253001..9ac47bab2ea7 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -331,11 +331,6 @@ int page_group_by_mobility_disabled __read_mostly;
  */
 DEFINE_STATIC_KEY_TRUE(deferred_pages);
 
-static inline bool deferred_pages_enabled(void)
-{
-	return static_branch_unlikely(&deferred_pages);
-}
-
 /*
  * deferred_grow_zone() is __init, but it is called from
  * get_page_from_freelist() during early boot until deferred_pages permanently
@@ -348,11 +343,6 @@ _deferred_grow_zone(struct zone *zone, unsigned int order)
 	return deferred_grow_zone(zone, order);
 }
 #else
-static inline bool deferred_pages_enabled(void)
-{
-	return false;
-}
-
 static inline bool _deferred_grow_zone(struct zone *zone, unsigned int order)
 {
 	return false;