Fair enough, you get a compiler warning:

kernel/trace/trace_kprobe.c: In function ‘validate_probe_symbol’:
kernel/trace/trace_kprobe.c:810:23: error: implicit declaration of function ‘find_module’; did you mean init_module’? [-Wimplicit-function-declaration]
  810 |                 mod = find_module(modname);
      |                       ^~~~~~~~~~~
      |                       init_module
kernel/trace/trace_kprobe.c:810:21: error: assignment to ‘struct module *’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
  810 |                 mod = find_module(modname);
      |    

but there is no find_module symbol when CONFIG_MODULES is disabled.