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

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Message-ID: <99359472-8b1e-4d51-adb8-5b16f1f90a9f@weissschuh.net>
Date: Mon, 20 Oct 2025 17:21:56 +0300 (GMT+03:00)
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Benjamin Berg <benjamin@...solutions.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,
	Benjamin Berg <benjamin.berg@...el.com>
Subject: Re: [PATCH v3 09/12] um: use nolibc for the --showconfig
 implementation

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.g5peaXCc-lkp@intel.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.g5peaXCc-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@...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.


Thomas