Re: [brauner-github:vfs.all 205/231] WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0x0 (section: .data) -> initramfs_test_extract (section: .init.text)

[David Disseldorp <ddiss@suse.de>]

[cc'ing linux-kselftest and kunit-dev]

Hi,

On Wed, 5 Mar 2025 01:47:55 +0800, kernel test robot wrote:

> tree:   https://github.com/brauner/linux.git vfs.all
> head:   ea47e99a3a234837d5fea0d1a20bb2ad1eaa6dd4
> commit: b6736cfccb582b7c016cba6cd484fbcf30d499af [205/231] initramfs_test: kunit tests for initramfs unpacking
> config: x86_64-buildonly-randconfig-002-20250304 (https://download.01.org/0day-ci/archive/20250305/202503050109.t5Ab93hX-lkp@intel.com/config)
> compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250305/202503050109.t5Ab93hX-lkp@intel.com/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 <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202503050109.t5Ab93hX-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>, old ones prefixed by <<):
> 
> >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0x0 (section: .data) -> initramfs_test_extract (section: .init.text)
> >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0x30 (section: .data) -> initramfs_test_fname_overrun (section: .init.text)
> >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0x60 (section: .data) -> initramfs_test_data (section: .init.text)
> >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0x90 (section: .data) -> initramfs_test_csum (section: .init.text)
> >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0xc0 (section: .data) -> initramfs_test_hardlink (section: .init.text)
> >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0xf0 (section: .data) -> initramfs_test_many (section: .init.text)  

These new warnings are covered in the commit message. The
kunit_test_init_section_suites() registered tests aren't in the .init
section as debugfs entries are retained for results reporting (without
an ability to rerun them).
IIUC, the __kunit_init_test_suites->CONCATENATE(..., _probe) suffix is
intended to suppress the modpost warning - @kunit-dev: any ideas why
this isn't working as intended?

Thanks, David