[intel-tdx:kvm-upstream-workaround 434/442] arch/x86/kvm/mmu/mmu.c:981:28: error: variable 'type' set but not used

kernel test robot
2022-06-30T01:12:27Z

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-m021-20220627 (https://download.01.org/0day-ci/archive/20220630/202206300915.FKqaMPoy-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
# 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
make 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@intel.com>

All errors (new ones prefixed by >>):

In file included from include/linux/kvm_host.h:47,
from arch/x86/kvm/irq.h:15,
from arch/x86/kvm/mmu/mmu.c:18:
include/linux/memfile_notifier.h:87:57: error: unknown type name 'flags'
87 | static int memfile_register_notifier(struct file *file, flags,
| ^~~~~
arch/x86/kvm/mmu/mmu.c: In function 'split_page_type':
>> arch/x86/kvm/mmu/mmu.c:981:28: error: variable 'type' set but not used [-Werror=unused-but-set-variable]
981 | enum kvm_page_type type;
| ^~~~
In file included from include/linux/kvm_host.h:47,
from arch/x86/kvm/irq.h:15,
from arch/x86/kvm/mmu/mmu.c:18:
At top level:
include/linux/memfile_notifier.h:93:13: error: 'memfile_unregister_notifier' defined but not used [-Werror=unused-function]
93 | static void memfile_unregister_notifier(struct memfile_notifier *notifier)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/memfile_notifier.h:82:13: error: 'memfile_notifier_invalidate' defined but not used [-Werror=unused-function]
82 | static void memfile_notifier_invalidate(struct memfile_node *node,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/memfile_notifier.h:77:13: error: 'memfile_notifier_populate' defined but not used [-Werror=unused-function]
77 | static void memfile_notifier_populate(struct memfile_node *node,
| ^~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/memfile_notifier.h:72:12: error: 'memfile_node_set_flags' defined but not used [-Werror=unused-function]
72 | static int memfile_node_set_flags(struct file *file, unsigned long flags)
| ^~~~~~~~~~~~~~~~~~~~~~
include/linux/memfile_notifier.h:68:13: error: 'memfile_register_backing_store' defined but not used [-Werror=unused-function]
68 | static void memfile_register_backing_store(struct memfile_backing_store *bs)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

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 <xiaoyao.li@intel.com>
:::::: CC: Isaku Yamahata <isaku.yamahata@intel.com>

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