On Thu, Jul 24, 2025 at 02:10:47PM +0800, Yibo Dong wrote:

On Wed, Jul 23, 2025 at 09:09:34PM +0100, Simon Horman wrote:

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On Wed, Jul 23, 2025 at 11:01:11AM +0800, Yibo Dong wrote:

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On Tue, Jul 22, 2025 at 12:29:09PM +0100, Simon Horman wrote:

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On Mon, Jul 21, 2025 at 07:32:24PM +0800, Dong Yibo wrote:

...

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But I can't get this warning follow steps in my local:
---
- make x86_64_defconfig
- make menuconfig  (select my driver rnpgbe to *)
- make W=1 -j 20
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if I compile it with 'make W=1 C=1 -j 20', some errors like this:
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./include/linux/skbuff.h:978:1: error: directive in macro's argument list
./include/linux/skbuff.h:981:1: error: directive in macro's argument list
........
Segmentation fault
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I also tried to use nipa/tests/patch/build_allmodconfig_warn
/build_allmodconfig.sh (not run the bot, just copy this sh to source
code). It seems the same with 'make W=1 C=1 -j 20'.
Is there something wrong for me? I want to get the warnings locally,
then I can check it before sending patches. Any suggestions to me, please?
Thanks for your feedback.

I would expect what you are trying to work.

I want to reproduce the warning locally, like this: 
'warning: symbol 'rnpgbe_driver_name' was not declared. Should it be static'
Then, I can check codes before sending patches.

Yes, I think that is a very good plan.

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And I certainly would not expect a segmentation fault.

I suspect that the version of Sparse you have is causing this problem
(although it is just a wild guess). I would suggest installing
from git. http://git.kernel.org/pub/scm/devel/sparse/sparse.git

The current HEAD is commit 0196afe16a50 ("Merge branch 'riscv'").
I have exercised it quite a lot.

nice, after installation, it works. I reproduced the warning, thanks.

Excellent.

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For reference, I also use:
GCC 15.1.0 from here: https://mirrors.edge.kernel.org/pub/tools/crosstool/
Clang 20.1.8 from here: https://mirrors.edge.kernel.org/pub/tools/llvm/
(Because they are the latest non -rc compilers available there)