WARNING: modpost: vmlinux: section mismatch in reference: mm_cmdline_setup+0x94 (section: .text.unlikely) -> memblock (section: .init.data)

WARNING: modpost: vmlinux: section mismatch in reference: mm_cmdline_setup+0x94 (section: .text.unlikely) -> memblock (section: .init.data)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   586de92313fcab8ed84ac5f78f4d2aae2db92c59
commit: 73db3abdca58c8a014ec4c88cf5ef925cbf63669 init/modpost: conditionally check section mismatch to __meminit*
date:   8 months ago
config: microblaze-randconfig-r061-20250323 (https://download.01.org/0day-ci/archive/20250324/202503241259.kJV3U7Xj-lkp@intel.com/config)
compiler: microblaze-linux-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250324/202503241259.kJV3U7Xj-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/202503241259.kJV3U7Xj-lkp@intel.com/

All warnings (new ones prefixed by >>, old ones prefixed by <<):

>> WARNING: modpost: vmlinux: section mismatch in reference: mm_cmdline_setup+0x94 (section: .text.unlikely) -> memblock (section: .init.data)
WARNING: modpost: missing MODULE_DESCRIPTION() in kernel/locking/test-ww_mutex.o
WARNING: modpost: missing MODULE_DESCRIPTION() in kernel/rcu/rcuscale.o
WARNING: modpost: missing MODULE_DESCRIPTION() in kernel/time/time_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in kernel/sysctl-test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in kernel/scftorture.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_cp861.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_cp863.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_cp865.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_cp866.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_cp869.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_cp1250.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_iso8859-4.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_iso8859-6.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_iso8859-14.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_iso8859-15.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/nls_utf8.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/mac-greek.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/nls/mac-roman.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/unicode/utf8data.o
WARNING: modpost: missing MODULE_DESCRIPTION() in fs/isofs/isofs.o
WARNING: modpost: missing MODULE_DESCRIPTION() in crypto/ecc.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/kunit/kunit-test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/kunit/kunit-example-test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/crypto/libarc4.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/string_helpers_kunit.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/test_bpf.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/test_printf.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/test_bitmap.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/list-test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/irqchip/irq-ts4800.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/irqchip/irq-meson-gpio.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/phy/broadcom/phy-bcm-ns-usb3.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pwm/pwm-imx1.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pwm/pwm-imx27.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pwm/pwm-samsung.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/pwm/pwm-spear.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt6779-mm.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt6779-ipe.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt6797-img.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt2712-apmixedsys.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt2712.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt2712-img.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt2712-jpgdec.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt2712-mfg.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt2712-vdec.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt7986-apmixed.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt7986-topckgen.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8183-apmixedsys.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8183.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8183-audio.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8183-cam.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8183-ipu0.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8183-ipu1.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8183-ipu_adl.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8183-ipu_conn.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8183-mm.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8183-vdec.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8183-venc.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8188-adsp_audio26m.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8188-cam.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8188-ccu.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8188-img.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8188-ipe.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8188-vdo0.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8188-vdo1.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8188-venc.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8365-apmixedsys.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8365.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8365-apu.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8365-cam.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8365-mfg.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8365-mm.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/mediatek/clk-mt8365-vdec.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/sunxi-ng/sun20i-d1-r-ccu.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/sunxi-ng/sun50i-a64-ccu.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/sunxi-ng/sun50i-a100-r-ccu.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/sunxi-ng/sun50i-h6-r-ccu.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/sunxi-ng/sun4i-a10-ccu.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/sunxi-ng/sun6i-a31-ccu.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/sunxi-ng/sun8i-a83t-ccu.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/sunxi-ng/sun8i-r40-ccu.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/sunxi-ng/sun8i-v3s-ccu.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/sunxi-ng/sun8i-r-ccu.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/clk-gate_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/clk-fractional-divider_test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/qcom/clk-qcom.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/qcom/lpass-gfm-sm8250.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/qcom/gcc-msm8976.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/clk/qcom/videocc-sdm845.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/dma/ti/omap-dma.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/dma/dmatest.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/soc/ixp4xx/ixp4xx-npe.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/soc/mediatek/mtk-cmdq-helper.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/soc/qcom/spm.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/virtio/virtio.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/virtio/virtio_ring.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/regulator/tps6286x-regulator.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/char/ttyprintk.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/char/lp.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/char/ppdev.o

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

Re: WARNING: modpost: vmlinux: section mismatch in reference: mm_cmdline_setup+0x94 (section: .text.unlikely) -> memblock (section: .init.data)

[Wei Yang]

On Mon, Mar 24, 2025 at 12:59:00PM +0800, kernel test robot wrote:
>tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>head:   586de92313fcab8ed84ac5f78f4d2aae2db92c59
>commit: 73db3abdca58c8a014ec4c88cf5ef925cbf63669 init/modpost: conditionally check section mismatch to __meminit*

Looks this is not the cause, after reverting this commit it still report
mismatch.

>date:   8 months ago
>config: microblaze-randconfig-r061-20250323 (https://download.01.org/0day-ci/archive/20250324/202503241259.kJV3U7Xj-lkp@intel.com/config)
>compiler: microblaze-linux-gcc (GCC) 10.5.0
>reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250324/202503241259.kJV3U7Xj-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/202503241259.kJV3U7Xj-lkp@intel.com/
>
>All warnings (new ones prefixed by >>, old ones prefixed by <<):
>
>>> WARNING: modpost: vmlinux: section mismatch in reference: mm_cmdline_setup+0x94 (section: .text.unlikely) -> memblock (section: .init.data)

The reason for this is gcc put mm_cmdline_setup into .text.unlikely section.
Since it is only used by mmu_init() which is annotated by __init, I think the
proper way is to add __init to mm_cmdline_setup.


diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index 4520c5741579..e98cfaf1c62b 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -143,7 +143,7 @@ int page_is_ram(unsigned long pfn)
 /*
  * Check for command-line options that affect what MMU_init will do.
  */
-static void mm_cmdline_setup(void)
+static void __init mm_cmdline_setup(void)
 {
 	unsigned long maxmem = 0;
 	char *p = cmd_line;


-- 
Wei Yang
Help you, Help me

Re: WARNING: modpost: vmlinux: section mismatch in reference: mm_cmdline_setup+0x94 (section: .text.unlikely) -> memblock (section: .init.data)

[Andrew Morton]

On Thu, 27 Mar 2025 01:13:12 +0000 Wei Yang <richard.weiyang@gmail.com> wrote:

> Since it is only used by mmu_init() which is annotated by __init, I think the
> proper way is to add __init to mm_cmdline_setup.
> 
> 
> diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
> index 4520c5741579..e98cfaf1c62b 100644
> --- a/arch/microblaze/mm/init.c
> +++ b/arch/microblaze/mm/init.c
> @@ -143,7 +143,7 @@ int page_is_ram(unsigned long pfn)
>  /*
>   * Check for command-line options that affect what MMU_init will do.
>   */
> -static void mm_cmdline_setup(void)
> +static void __init mm_cmdline_setup(void)
>  {
>  	unsigned long maxmem = 0;
>  	char *p = cmd_line;

That's a correct change anyway.  Please send along a patch sometime?

Re: WARNING: modpost: vmlinux: section mismatch in reference: mm_cmdline_setup+0x94 (section: .text.unlikely) -> memblock (section: .init.data)

[Wei Yang]

On Thu, Mar 27, 2025 at 12:36:24PM -0700, Andrew Morton wrote:
>On Thu, 27 Mar 2025 01:13:12 +0000 Wei Yang <richard.weiyang@gmail.com> wrote:
>
>> Since it is only used by mmu_init() which is annotated by __init, I think the
>> proper way is to add __init to mm_cmdline_setup.
>> 
>> 
>> diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
>> index 4520c5741579..e98cfaf1c62b 100644
>> --- a/arch/microblaze/mm/init.c
>> +++ b/arch/microblaze/mm/init.c
>> @@ -143,7 +143,7 @@ int page_is_ram(unsigned long pfn)
>>  /*
>>   * Check for command-line options that affect what MMU_init will do.
>>   */
>> -static void mm_cmdline_setup(void)
>> +static void __init mm_cmdline_setup(void)
>>  {
>>  	unsigned long maxmem = 0;
>>  	char *p = cmd_line;
>
>That's a correct change anyway.  Please send along a patch sometime?

Sure.

-- 
Wei Yang
Help you, Help me