diff --git a/arch/loongarch/kernel/setup.c b/arch/loongarch/kernel/setup.c
index 9c7760c31e5012..65d1adaf9b58e0 100644
--- a/arch/loongarch/kernel/setup.c
+++ b/arch/loongarch/kernel/setup.c
@@ -372,10 +372,6 @@ static void reserve_oldmem_region(void)
 
 void __init platform_init(void)
 {
-	arch_reserve_vmcore();
-	arch_reserve_crashkernel();
-	reserve_oldmem_region();
-
 #ifdef CONFIG_ACPI_TABLE_UPGRADE
 	acpi_table_upgrade();
 #endif
@@ -413,6 +409,10 @@ static void __init check_kernel_sections_mem(void)
  */
 static void __init arch_mem_init(char **cmdline_p)
 {
+	arch_reserve_vmcore();
+	arch_reserve_crashkernel();
+	reserve_oldmem_region();
+
 	if (usermem)
 		pr_info("User-defined physical RAM map overwrite\n");