linux-kernel - Re: [PATCH v3 08/15] x86: add new features for paravirt patching

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Date:   Thu, 17 Dec 2020 21:12:57 +0800
From:   kernel test robot <lkp@...el.com>
To:     Juergen Gross <jgross@...e.com>, xen-devel@...ts.xenproject.org,
        x86@...nel.org, linux-kernel@...r.kernel.org
Cc:     kbuild-all@...ts.01.org, Juergen Gross <jgross@...e.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH v3 08/15] x86: add new features for paravirt patching

Hi Juergen,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.10]
[cannot apply to xen-tip/linux-next tip/x86/core tip/x86/asm next-20201217]
[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/0day-ci/linux/commits/Juergen-Gross/x86-major-paravirt-cleanup/20201217-173646
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git accefff5b547a9a1d959c7e76ad539bf2480e78b
config: i386-randconfig-r021-20201217 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/032ee351da7a8adab17b0306cf5908b02f5728d2
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Juergen-Gross/x86-major-paravirt-cleanup/20201217-173646
        git checkout 032ee351da7a8adab17b0306cf5908b02f5728d2
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

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 >>):

   ld: arch/x86/kernel/alternative.o: in function `paravirt_set_cap':
>> arch/x86/kernel/alternative.c:605: undefined reference to `pv_is_native_spin_unlock'
>> ld: arch/x86/kernel/alternative.c:608: undefined reference to `pv_is_native_vcpu_is_preempted'


vim +605 arch/x86/kernel/alternative.c

   601	
   602	#ifdef CONFIG_PARAVIRT
   603	static void __init paravirt_set_cap(void)
   604	{
 > 605		if (!pv_is_native_spin_unlock())
   606			setup_force_cpu_cap(X86_FEATURE_PVUNLOCK);
   607	
 > 608		if (!pv_is_native_vcpu_is_preempted())
   609			setup_force_cpu_cap(X86_FEATURE_VCPUPREEMPT);
   610	}
   611	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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