linux-kernel - Re: [PATCH 2/3] selftests: lib.mk: Simplify TEST_GEN_MODS

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Date: Fri, 23 Feb 2024 11:40:00 +0800
From: Yujie Liu <yujie.liu@...el.com>
To: Marcos Paulo de Souza <mpdesouza@...e.com>
CC: kernel test robot <lkp@...el.com>, Shuah Khan <skhan@...uxfoundation.org>,
	Josh Poimboeuf <jpoimboe@...nel.org>, Jiri Kosina <jikos@...nel.org>,
	Miroslav Benes <mbenes@...e.cz>, Petr Mladek <pmladek@...e.com>, Joe Lawrence
	<joe.lawrence@...hat.com>, <oe-kbuild-all@...ts.linux.dev>,
	<linux-kselftest@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<live-patching@...r.kernel.org>
Subject: Re: [PATCH 2/3] selftests: lib.mk: Simplify TEST_GEN_MODS_DIR
 handling

On Wed, Feb 21, 2024 at 09:29:47AM -0300, Marcos Paulo de Souza wrote:
> On Mon, 19 Feb 2024 15:16:51 +0800 kernel test robot <lkp@...el.com> wrote:
> 
> > Hi Marcos,
> > 
> > kernel test robot noticed the following build warnings:
> > 
> > [auto build test WARNING on 345e8abe4c355bc24bab3f4a5634122e55be8665]
> > 
> > url:    https://github.com/intel-lab-lkp/linux/commits/Marcos-Paulo-de-Souza/selftests-lib-mk-Do-not-process-TEST_GEN_MODS_DIR/20240216-021601
> > base:   345e8abe4c355bc24bab3f4a5634122e55be8665
> > patch link:    https://lore.kernel.org/r/20240215-lp-selftests-fixes-v1-2-89f4a6f5cddc%40suse.com
> > patch subject: [PATCH 2/3] selftests: lib.mk: Simplify TEST_GEN_MODS_DIR handling
> > compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
> > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240219/202402191502.dALlSRz0-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/oe-kbuild-all/202402191502.dALlSRz0-lkp@intel.com/
> > 
> > All warnings (new ones prefixed by >>):
> > 
> > >> Makefile:11: warning: overriding recipe for target 'all'
> > >> ../lib.mk:62: warning: ignoring old recipe for target 'all'
> 
> I couldn't reproduce this one locally. Shuah, have you seen this issue in your
> setup? I followed the steps to reproduce this issue (it's the same sequence
> already reported in earlier patches...)

Hi Marcos,

This seems to be a warning when compiling futex selftest.

linux/tools/testing/selftests/futex$ make
Makefile:11: warning: overriding recipe for target 'all'
./lib.mk:62: warning: ignoring old recipe for target 'all'

There is no such warning if this patch is not applied. Looks like it is
due to the "all" target is defined in lib.mk but overridden in futex
Makefile? Could you please help take a look?

Thanks,
Yujie