Re: [PATCH v2] module: Extend module_blacklist parameter to built-in modules

Hi Aaron,

kernel test robot noticed the following build errors:

[auto build test ERROR on soc/for-next]
[also build test ERROR on linus/master arnd-asm-generic/master v7.2-rc6 next-20260805]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Aaron-Tomlin/module-Extend-module_blacklist-parameter-to-built-in-modules/20260805-123559
base:   https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next
patch link:    https://lore.kernel.org/r/20260622140259.2974-1-atomlin%40atomlin.com
patch subject: [PATCH v2] module: Extend module_blacklist parameter to built-in modules
config: powerpc64-randconfig-002-20260806 (https://download.01.org/0day-ci/archive/20260806/[email protected]/config)
compiler: clang version 22.1.3 (https://github.com/llvm/llvm-project e9846648fd6183ee6d8cbdb4502213fcf902a211)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260806/[email protected]/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All errors (new ones prefixed by >>):

>> init/main.c:1364:17: error: call to undeclared function 'module_is_blacklisted'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1364 |         if (modname && module_is_blacklisted(modname)) {
         |                        ^
   1 error generated.


vim +/module_is_blacklisted +1364 init/main.c

  1355	
  1356	int __init_or_module do_one_initcall(initcall_t fn)
  1357	{
  1358		int count = preempt_count();
  1359		char msgbuf[64];
  1360		const char *modname;
  1361		int ret;
  1362	
  1363		modname = initcall_get_modname(fn);
> 1364		if (modname && module_is_blacklisted(modname)) {
  1365			pr_info("Skipping initcall for blacklisted built-in module %s\n",
  1366				modname);
  1367			return 0;
  1368		}
  1369	
  1370		if (initcall_blacklisted(fn))
  1371			return -EPERM;
  1372	
  1373		do_trace_initcall_start(fn);
  1374		ret = fn();
  1375		do_trace_initcall_finish(fn, ret);
  1376	
  1377		msgbuf[0] = 0;
  1378	
  1379		if (preempt_count() != count) {
  1380			sprintf(msgbuf, "preemption imbalance ");
  1381			preempt_count_set(count);
  1382		}
  1383		if (irqs_disabled()) {
  1384			strlcat(msgbuf, "disabled interrupts ", sizeof(msgbuf));
  1385			local_irq_enable();
  1386		}
  1387		WARN(msgbuf[0], "initcall %pS returned with %s\n", fn, msgbuf);
  1388	
  1389		add_latent_entropy();
  1390		return ret;
  1391	}
  1392	

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