[intel-tdx:kvm-upstream-workaround 434/442] arch/x86/kvm/mmu/mmu.c:981:21: error: variable 'type' set but not used
From: kernel test robot
Date: Wed Jun 29 2022 - 11:15:11 EST
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: i386-randconfig-a002 (https://download.01.org/0day-ci/archive/20220629/202206292314.Byr20MEd-lkp@xxxxxxxxx/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project a774ba7f60d1fef403b5507b1b1a7475d3684d71)
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=i386 SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All errors (new ones prefixed by >>):
In file included from arch/x86/kvm/mmu/mmu.c:18:
In file included from arch/x86/kvm/irq.h:15:
In file included from include/linux/kvm_host.h:47:
include/linux/memfile_notifier.h:87:57: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
static int memfile_register_notifier(struct file *file, flags,
^
int
>> arch/x86/kvm/mmu/mmu.c:981:21: error: variable 'type' set but not used [-Werror,-Wunused-but-set-variable]
enum kvm_page_type type;
^
2 errors generated.
vim +/type +981 arch/x86/kvm/mmu/mmu.c
aa7e272e931503d Xiaoyao Li 2021-08-31 976
dbe93493d574730 Xiaoyao Li 2022-05-25 977 static void split_page_type(gfn_t gfn, struct kvm_memory_slot *slot,
dbe93493d574730 Xiaoyao Li 2022-05-25 978 enum pg_level level)
aa7e272e931503d Xiaoyao Li 2021-08-31 979 {
aa7e272e931503d Xiaoyao Li 2021-08-31 980 struct kvm_page_attr *page_attr = page_attr_slot(gfn, slot, level);
aa7e272e931503d Xiaoyao Li 2021-08-31 @981 enum kvm_page_type type;
aa7e272e931503d Xiaoyao Li 2021-08-31 982 gfn_t base_gfn;
aa7e272e931503d Xiaoyao Li 2021-08-31 983
aa7e272e931503d Xiaoyao Li 2021-08-31 984 if (WARN_ON_ONCE(!kvm_page_type_valid(page_attr) || level <= PG_LEVEL_4K))
aa7e272e931503d Xiaoyao Li 2021-08-31 985 return;
aa7e272e931503d Xiaoyao Li 2021-08-31 986
aa7e272e931503d Xiaoyao Li 2021-08-31 987 base_gfn = gfn & ~(KVM_PAGES_PER_HPAGE(level) - 1);
aa7e272e931503d Xiaoyao Li 2021-08-31 988 type = page_attr->type;
dbe93493d574730 Xiaoyao Li 2022-05-25 989
aa7e272e931503d Xiaoyao Li 2021-08-31 990 /*
aa7e272e931503d Xiaoyao Li 2021-08-31 991 * Set the type to KVM_PAGE_TYPE_MIXED in advance since when a large
aa7e272e931503d Xiaoyao Li 2021-08-31 992 * page needs to be split means one of the 4K page of it needs to be
aa7e272e931503d Xiaoyao Li 2021-08-31 993 * changed to oppsite type
aa7e272e931503d Xiaoyao Li 2021-08-31 994 */
2cf2a8208ae24b9 Isaku Yamahata 2022-06-02 995 page_type_set(page_attr, KVM_PAGE_TYPE_MIXED, base_gfn, slot, level);
aa7e272e931503d Xiaoyao Li 2021-08-31 996 }
aa7e272e931503d 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 <xiaoyao.li@xxxxxxxxx>
:::::: CC: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>
--
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https://01.org/lkp