Subject: Re: [PATCH 2/2] powerpc/mobility: disabling hard lockup watchdog during LPM

From: kernel test robot <[email-masked]>
Date: Mon, 6 Jun 2022 09:41:56 +0800

Hi Laurent,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[also build test ERROR on v5.18 next-20220603]
[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]

url:    https://github.com/intel-lab-lkp/linux/commits/Laurent-Dufour/Disabling-NMI-watchdog-during-LPM-s-memory-transfer/20220601-235741
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc64-randconfig-r002-20220605 (https://download.01.org/0day-ci/archive/20220606/[email-masked]/config)
compiler: powerpc64-linux-gcc (GCC) 11.3.0
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://github.com/intel-lab-lkp/linux/commit/d409d8549db37257e33691523100679a23cfd887
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Laurent-Dufour/Disabling-NMI-watchdog-during-LPM-s-memory-transfer/20220601-235741
        git checkout d409d8549db37257e33691523100679a23cfd887
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <[email-masked]>

All errors (new ones prefixed by >>):

   powerpc64-linux-ld: warning: discarding dynamic section .glink
   powerpc64-linux-ld: warning: discarding dynamic section .plt
   powerpc64-linux-ld: linkage table error against `watchdog_nmi_stop'
   powerpc64-linux-ld: stubs don't match calculated size
   powerpc64-linux-ld: can not build stubs: bad value
   powerpc64-linux-ld: arch/powerpc/platforms/pseries/mobility.o: in function `.pseries_migrate_partition':
>> arch/powerpc/platforms/pseries/mobility.c:705: undefined reference to `.watchdog_nmi_stop'
>> powerpc64-linux-ld: arch/powerpc/platforms/pseries/mobility.c:715: undefined reference to `.watchdog_nmi_start'

vim +705 arch/powerpc/platforms/pseries/mobility.c

   693	
   694	static int pseries_migrate_partition(u64 handle)
   695	{
   696		int ret;
   697	
   698		ret = wait_for_vasi_session_suspending(handle);
   699		if (ret)
   700			return ret;
   701	
   702		vas_migration_handler(VAS_SUSPEND);
   703	
   704		pr_debug("Disabling the NMI watchdog\n");
 > 705		watchdog_nmi_stop();
   706	
   707		ret = pseries_suspend(handle);
   708		if (ret == 0) {
   709			post_mobility_fixup();
   710			wait_for_vasi_session_completed(handle);
   711		} else
   712			pseries_cancel_migration(handle, ret);
   713	
   714		pr_debug("Enabling the NMI watchdog again\n");
 > 715		watchdog_nmi_start();
   716	
   717		vas_migration_handler(VAS_RESUME);
   718	
   719		return ret;
   720	}
   721	

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