netdev - Re: [PATCH v2 01/15] net: rnpgbe: Add build support for rnpgbe

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Message-ID: <20250723200934.GO1036606@horms.kernel.org>
Date: Wed, 23 Jul 2025 21:09:34 +0100
From: Simon Horman <horms@...nel.org>
To: Yibo Dong <dong100@...se.com>
Cc: andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, corbet@....net,
	gur.stavi@...wei.com, maddy@...ux.ibm.com, mpe@...erman.id.au,
	danishanwar@...com, lee@...ger.us, gongfan1@...wei.com,
	lorenzo@...nel.org, geert+renesas@...der.be,
	Parthiban.Veerasooran@...rochip.com, lukas.bulwahn@...hat.com,
	alexanderduyck@...com, richardcochran@...il.com,
	netdev@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 01/15] net: rnpgbe: Add build support for rnpgbe

On Wed, Jul 23, 2025 at 11:01:11AM +0800, Yibo Dong wrote:
> On Tue, Jul 22, 2025 at 12:29:09PM +0100, Simon Horman wrote:
> > On Mon, Jul 21, 2025 at 07:32:24PM +0800, Dong Yibo wrote:

...

> 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
> ---
> if I compile it with 'make W=1 C=1 -j 20', some errors like this:
> ---
> ./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
> ---
> 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.
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.

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)