diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index b55be44ff9bdf3ebad11a952b56b366ab2310ed7..5b813532db596d352e3b1ad44dd01fe3ebb774a2 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -150,7 +150,8 @@ void __init setup_bootmem(void)
 	memblock_reserve(vmlinux_start, vmlinux_end - vmlinux_start);
 
 	set_max_mapnr(PFN_DOWN(mem_size));
-	max_low_pfn = PFN_DOWN(memblock_end_of_DRAM());
+	max_pfn = PFN_DOWN(memblock_end_of_DRAM());
+	max_low_pfn = max_pfn;
 
 #ifdef CONFIG_BLK_DEV_INITRD
 	setup_initrd();