linux-kernel - Re: [PATCH v3 09/12] um: use nolibc for the --showconfig implementation

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Message-ID: <516b490d30be6d0676ffe3be5942954bc3c08a39.camel@sipsolutions.net>
Date: Wed, 29 Oct 2025 15:07:12 +0100
From: Benjamin Berg <benjamin@...solutions.net>
To: Thomas Weißschuh <linux@...ssschuh.net>
Cc: linux-um@...ts.infradead.org, Willy Tarreau <w@....eu>, 
	linux-kselftest@...r.kernel.org, kernel test robot <lkp@...el.com>, Arnaldo
 Carvalho de Melo	 <acme@...hat.com>, oe-kbuild-all@...ts.linux.dev,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 09/12] um: use nolibc for the --showconfig
 implementation

Hi Thomas,

On Mon, 2025-10-20 at 17:21 +0300, Thomas Weißschuh wrote:
> Hi Benjamin,
> 
> Sep 26, 2025 15:57:43 kernel test robot <lkp@...el.com>:
> 
> > kernel test robot noticed the following build warnings:
> > 
> > [auto build test WARNING on uml/next]
> > [also build test WARNING on uml/fixes shuah-kselftest/next shuah-
> > kselftest/fixes linus/master v6.17-rc7 next-20250925]
> > [If your patch is applied to the wrong git tree, kindly drop us a
> > note.
> > And when submitting patch, we suggest to use '--base' as documented
> > in
> > https://git-scm.com/docs/git-format-patch#_base_tree_information]
> > 
> > url:   
> > https://github.com/intel-lab-lkp/linux/commits/Benjamin-Berg/tools-compiler-h-fix-__used-definition/20250924-222547
> > base:  
> > https://git.kernel.org/pub/scm/linux/kernel/git/uml/linux next
> > patch link:   
> > https://lore.kernel.org/r/20250924142059.527768-10-benjamin%40sipsolutions.net
> > patch subject: [PATCH v3 09/12] um: use nolibc for the --showconfig
> > implementation
> > :::::: branch date: 2 days ago
> > :::::: commit date: 2 days ago
> > config: um-randconfig-r111-20250926
> > (https://download.01.org/0day-ci/archive/20250926/202509261452.g5pe
> > aXCc-lkp@...el.com/config)
> > compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
> > reproduce (this is a W=1 build):
> > (https://download.01.org/0day-ci/archive/20250926/202509261452.g5pe
> > aXCc-lkp@...el.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@...el.com>
> > > Closes:
> > > https://lore.kernel.org/r/202509261452.g5peaXCc-lkp@intel.com/
> > 
> > sparse warnings: (new ones prefixed by >>)
> >    command-line: note: in included file (through
> > tools/include/nolibc/nolibc.h, tools/include/nolibc/stddef.h,
> > arch/um/include/shared/user.h, builtin):
> > > > tools/include/nolibc/sys.h:109:29: sparse: sparse: Using plain
> > > > integer as NULL pointer
> >   unistd.h:70:30: sparse: sparse: Using plain integer as NULL
> > pointer
> >    tools/include/nolibc/unistd.h:70:33: sparse: sparse: Using plain
> > integer as NULL pointer
> 
> Do you intend to work on your UML with nolibc patches this cycle?
> If not I would fix these sparse warnings in the nolibc tree and also
> apply your nolibc patches.

We are not in a hurry for the UML part and while it shouldn't be too
much work, I obviously didn't get around to it in the last week.

So, feel free to pull the patches in via your tree. Then I'll submit
the UML part again in the next cycle.

Benjamin