diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 2449d9279131..8ef030828e9d 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -1774,6 +1774,7 @@ out_unlock:
 	return retval ?: nbytes;
 }
 
+#ifdef CONFIG_CPUSETS_ASSIST
 static ssize_t cpuset_write_resmask_assist(struct kernfs_open_file *of,
 					   struct cs_target tgt, size_t nbytes,
 					   loff_t off)
@@ -1781,6 +1782,7 @@ static ssize_t cpuset_write_resmask_assist(struct kernfs_open_file *of,
 	pr_info("cpuset_assist: setting %s to %s\n", tgt.name, tgt.cpus);
 	return cpuset_write_resmask(of, tgt.cpus, nbytes, off);
 }
+#endif
 
 static ssize_t cpuset_write_resmask_wrapper(struct kernfs_open_file *of,
 					 char *buf, size_t nbytes, loff_t off)