--- a/kernel/sched/MuQSS.c
+++ b/kernel/sched/MuQSS.c
@@ -227,6 +227,7 @@
 
 #ifdef CONFIG_SCHED_SMT
 DEFINE_STATIC_KEY_FALSE(sched_smt_present);
+EXPORT_SYMBOL_GPL(sched_smt_present);
 #endif
 
 #else