linux-kernel - Re: [PATCH] KVM: Check the allocation of pv cpu mask

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Message-ID: <202009020129.H90h8RdM%lkp@intel.com>
Date:   Wed, 2 Sep 2020 01:35:52 +0800
From:   kernel test robot <lkp@...el.com>
To:     Haiwei Li <lihaiwei.kernel@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        "hpa@...or.com" <hpa@...or.com>, "bp@...en8.de" <bp@...en8.de>,
        "mingo@...hat.com" <mingo@...hat.com>, tglx@...utronix.de,
        joro@...tes.org, jmattson@...gle.com,
        "wanpengli@...cent.com" <wanpengli@...cent.com>
Subject: Re: [PATCH] KVM: Check the allocation of pv cpu mask

Hi Haiwei,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on kvm/linux-next]
[also build test ERROR on linus/master v5.9-rc3 next-20200828]
[cannot apply to linux/master vhost/linux-next]
[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/Haiwei-Li/KVM-Check-the-allocation-of-pv-cpu-mask/20200901-195412
base:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next
config: x86_64-randconfig-a011-20200901 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c10e63677f5d20f18010f8f68c631ddc97546f7d)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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 >>):

>> arch/x86/kernel/kvm.c:801:35: error: use of undeclared identifier 'kvm_send_ipi_mask_allbutself'
           apic->send_IPI_mask_allbutself = kvm_send_ipi_mask_allbutself;
                                            ^
   1 error generated.

# https://github.com/0day-ci/linux/commit/13dd13ab0aefbb5c31bd8681831e6a11ac381509
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Haiwei-Li/KVM-Check-the-allocation-of-pv-cpu-mask/20200901-195412
git checkout 13dd13ab0aefbb5c31bd8681831e6a11ac381509
vim +/kvm_send_ipi_mask_allbutself +801 arch/x86/kernel/kvm.c

   791	
   792		if (alloc)
   793			for_each_possible_cpu(cpu) {
   794				if (!zalloc_cpumask_var_node(
   795					per_cpu_ptr(&__pv_cpu_mask, cpu),
   796					GFP_KERNEL, cpu_to_node(cpu))) {
   797					goto zalloc_cpumask_fail;
   798				}
   799			}
   800	
 > 801		apic->send_IPI_mask_allbutself = kvm_send_ipi_mask_allbutself;
   802		pv_ops.mmu.flush_tlb_others = kvm_flush_tlb_others;
   803		return 0;
   804	
   805	zalloc_cpumask_fail:
   806		kvm_free_pv_cpu_mask();
   807		return -ENOMEM;
   808	}
   809	arch_initcall(kvm_alloc_cpumask);
   810	

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

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