diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c
index c180a64..d58b5e7 100644
--- a/arch/riscv/kernel/smp.c
+++ b/arch/riscv/kernel/smp.c
@@ -43,6 +43,7 @@ enum ipi_message_type {
 unsigned long __cpuid_to_hartid_map[NR_CPUS] __ro_after_init = {
 	[0 ... NR_CPUS-1] = INVALID_HARTID
 };
+EXPORT_SYMBOL_GPL(__cpuid_to_hartid_map);
 
 void __init smp_setup_processor_id(void)
 {