diff --git a/kernel/kmod.c b/kernel/kmod.c
index ff2c7cb86d770aaf51712e330dc0f1e8a72a26e6..2a8351516a0ea875a0ca062e149a76bfa9682396 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -577,6 +577,12 @@ int call_usermodehelper_exec(struct subprocess_info *sub_info, int wait)
 	return retval;
 }
 
+/*
+ * call_usermodehelper_fns() will not run the caller-provided cleanup function
+ * if a memory allocation failure is experienced.  So the caller might need to
+ * check the call_usermodehelper_fns() return value: if it is -ENOMEM, perform
+ * the necessaary cleanup within the caller.
+ */
 int call_usermodehelper_fns(
 	char *path, char **argv, char **envp, int wait,
 	int (*init)(struct subprocess_info *info, struct cred *new),