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Mon, 27 Jun 2022 21:29:51 +0000 Date: Tue, 28 Jun 2022 05:29:12 +0800 From: kernel test robot To: Isaku Yamahata Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, linux-kernel@vger.kernel.org Subject: [intel-tdx:kvm-upstream-workaround 434/442] arch/x86/kvm/mmu/mmu.c:981:21: warning: variable 'type' set but not used Message-ID: <202206280555.alASo2T9-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://github.com/intel/tdx.git kvm-upstream-workaround head: 8af973ebaf30642129fc1ca63f155a469f9615ed commit: 2cf2a8208ae24b96f074aac76f0feef63489137d [434/442] KVM: x86/mmu: update lpage_info on changing page_type config: x86_64-randconfig-a004-20220627 (https://download.01.org/0day-ci/archive/20220628/202206280555.alASo2T9-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 016342e319fd31e41cf5ed16a6140a8ea2de74dd) 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/2cf2a8208ae24b96f074aac76f0feef63489137d git remote add intel-tdx https://github.com/intel/tdx.git git fetch --no-tags intel-tdx kvm-upstream-workaround git checkout 2cf2a8208ae24b96f074aac76f0feef63489137d # 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 arch/x86/kvm/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> arch/x86/kvm/mmu/mmu.c:981:21: warning: variable 'type' set but not used [-Wunused-but-set-variable] enum kvm_page_type type; ^ 1 warning generated. vim +/type +981 arch/x86/kvm/mmu/mmu.c aa7e272e931503 Xiaoyao Li 2021-08-31 976 dbe93493d57473 Xiaoyao Li 2022-05-25 977 static void split_page_type(gfn_t gfn, struct kvm_memory_slot *slot, dbe93493d57473 Xiaoyao Li 2022-05-25 978 enum pg_level level) aa7e272e931503 Xiaoyao Li 2021-08-31 979 { aa7e272e931503 Xiaoyao Li 2021-08-31 980 struct kvm_page_attr *page_attr = page_attr_slot(gfn, slot, level); aa7e272e931503 Xiaoyao Li 2021-08-31 @981 enum kvm_page_type type; aa7e272e931503 Xiaoyao Li 2021-08-31 982 gfn_t base_gfn; aa7e272e931503 Xiaoyao Li 2021-08-31 983 aa7e272e931503 Xiaoyao Li 2021-08-31 984 if (WARN_ON_ONCE(!kvm_page_type_valid(page_attr) || level <= PG_LEVEL_4K)) aa7e272e931503 Xiaoyao Li 2021-08-31 985 return; aa7e272e931503 Xiaoyao Li 2021-08-31 986 aa7e272e931503 Xiaoyao Li 2021-08-31 987 base_gfn = gfn & ~(KVM_PAGES_PER_HPAGE(level) - 1); aa7e272e931503 Xiaoyao Li 2021-08-31 988 type = page_attr->type; dbe93493d57473 Xiaoyao Li 2022-05-25 989 aa7e272e931503 Xiaoyao Li 2021-08-31 990 /* aa7e272e931503 Xiaoyao Li 2021-08-31 991 * Set the type to KVM_PAGE_TYPE_MIXED in advance since when a large aa7e272e931503 Xiaoyao Li 2021-08-31 992 * page needs to be split means one of the 4K page of it needs to be aa7e272e931503 Xiaoyao Li 2021-08-31 993 * changed to oppsite type aa7e272e931503 Xiaoyao Li 2021-08-31 994 */ 2cf2a8208ae24b Isaku Yamahata 2022-06-02 995 page_type_set(page_attr, KVM_PAGE_TYPE_MIXED, base_gfn, slot, level); aa7e272e931503 Xiaoyao Li 2021-08-31 996 } aa7e272e931503 Xiaoyao Li 2021-08-31 997 :::::: The code at line 981 was first introduced by commit :::::: aa7e272e931503dda524bd4f15d098a0d4ac28d7 KVM: MMU: Update page_attr->type when guest converts the page :::::: TO: Xiaoyao Li :::::: CC: Isaku Yamahata -- 0-DAY CI Kernel Test Service https://01.org/lkp