linux-kernel - [intel-tdx:kvm-upstream-workaround 49/308] ./usr/include/asm/kvm.h:606:22: warning: field 'cpuid' with variable sized type 'struct kvm_cpuid2' not at the end of a struct or class is a GNU extension

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Message-ID: <202208170516.hBUfXo8O-lkp@intel.com>
Date:   Wed, 17 Aug 2022 06:07:28 +0800
From:   kernel test robot <lkp@...el.com>
To:     Xiaoyao Li <xiaoyao.li@...el.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Isaku Yamahata <isaku.yamahata@...el.com>
Subject: [intel-tdx:kvm-upstream-workaround 49/308]
 ./usr/include/asm/kvm.h:606:22: warning: field 'cpuid' with variable sized
 type 'struct kvm_cpuid2' not at the end of a struct or class is a GNU
 extension

tree:   https://github.com/intel/tdx.git kvm-upstream-workaround
head:   85c097fdd1667a842a9e75d8f658fc16bd72981a
commit: b20b2fef887cd148f6997b362c235f72ee971052 [49/308] KVM: TDX: initialize VM with TDX specific parameters
config: x86_64-randconfig-a011-20220815 (https://download.01.org/0day-ci/archive/20220817/202208170516.hBUfXo8O-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project aed5e3bea138ce581d682158eb61c27b3cfdd6ec)
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/tdx/commit/b20b2fef887cd148f6997b362c235f72ee971052
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx kvm-upstream-workaround
        git checkout b20b2fef887cd148f6997b362c235f72ee971052
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   In file included from <built-in>:1:
>> ./usr/include/asm/kvm.h:606:22: warning: field 'cpuid' with variable sized type 'struct kvm_cpuid2' not at the end of a struct or class is a GNU extension [-Wgnu-variable-sized-type-not-at-end]
                           struct kvm_cpuid2 cpuid;
                                             ^
   1 warning generated.

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp