[linux-next:master 11199/11507] init/initramfs_test.c:580:22: error: implicit declaration of function '__override_init_fs'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   415606a7be939835db9b0d6b711887586646346d
commit: da46f0e1053c98355c2d7803ff1cc46617ca81bf [11199/11507] initramfs_test: use test init/exit hooks to override init fs
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20260801/[email protected]/config)
compiler: alpha-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260801/[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/initramfs_test.c: In function 'initramfs_test_init':
>> init/initramfs_test.c:580:22: error: implicit declaration of function '__override_init_fs' [-Wimplicit-function-declaration]
     580 |         test->priv = __override_init_fs();
         |                      ^~~~~~~~~~~~~~~~~~
>> init/initramfs_test.c:580:20: error: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
     580 |         test->priv = __override_init_fs();
         |                    ^
   init/initramfs_test.c: In function 'initramfs_test_exit':
>> init/initramfs_test.c:586:9: error: implicit declaration of function '__revert_init_fs' [-Wimplicit-function-declaration]
     586 |         __revert_init_fs(test->priv);
         |         ^~~~~~~~~~~~~~~~


vim +/__override_init_fs +580 init/initramfs_test.c

   576	
   577	/* Tests run in a nullfs kthread; always use the init fs for path resolution. */
   578	static int __init initramfs_test_init(struct kunit *test)
   579	{
 > 580		test->priv = __override_init_fs();
   581		return 0;
   582	}
   583	
   584	static void __init initramfs_test_exit(struct kunit *test)
   585	{
 > 586		__revert_init_fs(test->priv);
   587	}
   588	

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki