diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 9e7b3ee78089..b379a75ac6a6 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -94,8 +94,9 @@ static void __init setup_initrd(void)
 	initrd_end = 0;
 }
 
-void free_initrd_mem(unsigned long start, unsigned long end)
+void __init free_initrd_mem(unsigned long start, unsigned long end)
 {
+	free_reserved_area((void *)start, (void *)end, -1, "initrd");
 }
 #endif /* CONFIG_BLK_DEV_INITRD */