diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c
index ce4e939a7f07..2b89b6c53801 100644
--- a/arch/arc/mm/init.c
+++ b/arch/arc/mm/init.c
@@ -74,11 +74,6 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size)
 		base, TO_MB(size), !in_use ? "Not used":"");
 }
 
-bool arch_has_descending_max_zone_pfns(void)
-{
-	return !IS_ENABLED(CONFIG_ARC_HAS_PAE40);
-}
-
 /*
  * First memory setup routine called from setup_arch()
  * 1. setup swapper's mm @init_mm
diff --git a/include/linux/mm.h b/include/linux/mm.h
index e249208f8fbe..5e5ef6ee4003 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3035,7 +3035,6 @@ extern void setup_per_cpu_pageset(void);
 extern int min_free_kbytes;
 extern int watermark_boost_factor;
 extern int watermark_scale_factor;
-extern bool arch_has_descending_max_zone_pfns(void);
 
 /* nommu.c */
 extern atomic_long_t mmap_pages_allocated;
diff --git a/mm/mm_init.c b/mm/mm_init.c
index dd3a6ed9663f..a0ec3b3acb5e 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -1752,9 +1752,9 @@ static void __init free_area_init_memoryless_node(int nid)
  * Some architectures, e.g. ARC may have ZONE_HIGHMEM below ZONE_NORMAL. For
  * such cases we allow max_zone_pfn sorted in the descending order
  */
-bool __weak arch_has_descending_max_zone_pfns(void)
+static bool arch_has_descending_max_zone_pfns(void)
 {
-	return false;
+	return IS_ENABLED(CONFIG_ARC) && !IS_ENABLED(CONFIG_ARC_HAS_PAE40);
 }
 
 /**