diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index a159ae07d66f86546887091757f9cb1c413cfb12..184ad34b9c582b1b4dce703201fa66149d7c3799 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -409,6 +409,9 @@ void __init efi_find_mirror(void)
 	efi_memory_desc_t *md;
 	u64 mirror_size = 0, total_size = 0;
 
+	if (!mirrored_kernelcore)
+		return;
+
 	for_each_efi_memory_desc(md) {
 		unsigned long long start = md->phys_addr;
 		unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
diff --git a/include/linux/mm.h b/include/linux/mm.h
index b318e9c6cc43dde5bb7fd63eeec248066582c3e2..460b8d4cae8772e5bdfe8336e66cccc132dbbf68 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2270,6 +2270,8 @@ extern void free_bootmem_with_active_regions(int nid,
 						unsigned long max_low_pfn);
 extern void sparse_memory_present_with_active_regions(int nid);
 
+extern bool mirrored_kernelcore;
+
 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
 
 #if !defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP) && \
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 200e19fe216ae662e4b707143cfb7aa25a4c710b..14b4debd998e90d77596c34b0a710e83088a79c3 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -319,7 +319,7 @@ static unsigned long required_kernelcore_percent __initdata;
 static unsigned long required_movablecore __initdata;
 static unsigned long required_movablecore_percent __initdata;
 static unsigned long zone_movable_pfn[MAX_NUMNODES] __meminitdata;
-static bool mirrored_kernelcore __meminitdata;
+bool mirrored_kernelcore __meminitdata;
 
 /* movable_zone is the "real" zone pages in ZONE_MOVABLE are taken from */
 int movable_zone;