linux-kernel - Re: [kbuild-all] Re: [paulmck-rcu:dev.2022.02.17a 73/73] make[3]: *** No rule to make target 'kernel/rcu/typesafe.o', needed by 'kernel/rcu/built-in.a'.

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Message-ID: <b481fd02-7b4f-7752-8852-d1a61b4916f1@intel.com>
Date:   Tue, 22 Feb 2022 16:30:40 +0800
From:   "Chen, Rong A" <rong.a.chen@...el.com>
To:     paulmck@...nel.org, kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: Re: [kbuild-all] Re: [paulmck-rcu:dev.2022.02.17a 73/73] make[3]: ***
 No rule to make target 'kernel/rcu/typesafe.o', needed by
 'kernel/rcu/built-in.a'.



On 2/22/2022 5:47 AM, Paul E. McKenney wrote:
> On Tue, Feb 22, 2022 at 03:05:27AM +0800, kernel test robot wrote:
>> Hi Paul,
>>
>> First bad commit (maybe != root cause):
>>
>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2022.02.17a
>> head:   f5b2eaf791ebbd6af881947ab7c40ed70681e534
>> commit: f5b2eaf791ebbd6af881947ab7c40ed70681e534 [73/73] EXP torture: Add tests demoing SLAB_TYPESAFE_BY_RCU
>> config: arc-allyesconfig (https://download.01.org/0day-ci/archive/20220222/202202220308.TNib9D2v-lkp@intel.com/config)
>> compiler: arceb-elf-gcc (GCC) 11.2.0
>> reproduce (this is a W=1 build):
>>          wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>>          chmod +x ~/bin/make.cross
>>          # https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git/commit/?id=f5b2eaf791ebbd6af881947ab7c40ed70681e534
>>          git remote add paulmck-rcu https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
>>          git fetch --no-tags paulmck-rcu dev.2022.02.17a
>>          git checkout f5b2eaf791ebbd6af881947ab7c40ed70681e534
>>          # save the config file to linux build tree
>>          mkdir build_dir
>>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash
>>
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot <lkp@...el.com>
>>
>> All errors (new ones prefixed by >>):
>>
>>>> make[3]: *** No rule to make target 'kernel/rcu/typesafe.o', needed by 'kernel/rcu/built-in.a'.
>>     make[3]: Target '__build' not remade because of errors.
> 
> This is the only commit involving kernel/rcu/typesafe.o, so...
> 
> One the one hand, I do not plan to upstream this, so maybe it doesn't
> matter.
> 
> I have been building this using the rcutorture scripting for some time,
> same RCU-related .config as you are using.  But when I pulled it into
> a clone in a neighboring directory, it failed just as it did for you.
> The problem was that the update to kernel/rcu/Makefile somehow didn't
> come across, so this line was missing:
> 
> 	obj-$(CONFIG_RCU_TYPESAFE_TEST) += typesafe.o
> 
> Which of course explains the build failure.
> 
> I blew away that clone and re-cloned it.  And it still failed, both
> with "make" from the commandline and under rcutorture.
> 
> Hahahahahahaahaha!!!
> 
> I forgot "git add kernel/rcu/typesafe.c".
> 
> There is now a new typesafe.2022.02.21a tag with this file added.
> 
> Good catch!  That file happened to still be lying around.  The first
> "git reset --hard" would have destroyed.  Thank you!!!
> 
> And with that fixed, my clone now builds correctly.  Does this fix
> it for you?

Hi Paul,

I can't find the tag 'typesafe.2022.02.21a' from 
https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git/refs/tags

Best Regards,
Rong Chen

> 
> 							Thanx, Paul
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