linux-kernel - [linux-next:master 911/10933] arch/x86/kvm/mmu/mmu.c:102:22: sparse: sparse: symbol 'tdp_mmu_allowed' was not declared. Should it be static?

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Date:   Tue, 7 Feb 2023 20:50:11 +0800
From:   kernel test robot <lkp@...el.com>
To:     David Matlack <dmatlack@...gle.com>
Cc:     oe-kbuild-all@...ts.linux.dev,
        Linux Memory Management List <linux-mm@...ck.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Kai Huang <kai.huang@...el.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [linux-next:master 911/10933] arch/x86/kvm/mmu/mmu.c:102:22: sparse:
 sparse: symbol 'tdp_mmu_allowed' was not declared. Should it be static?

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   49a8133221c71b935f36a7c340c0271c2a9ee2db
commit: 3af15ff47c4df3af7b36ea8315f43c6b0af49253 [911/10933] KVM: x86/mmu: Change tdp_mmu to a read-only parameter
config: x86_64-randconfig-s023-20230206 (https://download.01.org/0day-ci/archive/20230207/202302072055.odjDVd5V-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=3af15ff47c4df3af7b36ea8315f43c6b0af49253
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 3af15ff47c4df3af7b36ea8315f43c6b0af49253
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 olddefconfig
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' 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 <lkp@...el.com>

sparse warnings: (new ones prefixed by >>)
>> arch/x86/kvm/mmu/mmu.c:102:22: sparse: sparse: symbol 'tdp_mmu_allowed' was not declared. Should it be static?
   arch/x86/kvm/mmu/mmu.c:621:9: sparse: sparse: context imbalance in 'walk_shadow_page_lockless_begin' - different lock contexts for basic block
   arch/x86/kvm/mmu/mmu.c: note: in included file (through include/linux/rbtree.h, include/linux/mm_types.h, arch/x86/kvm/irq.h):
   include/linux/rcupdate.h:769:9: sparse: sparse: context imbalance in 'walk_shadow_page_lockless_end' - unexpected unlock
   arch/x86/kvm/mmu/mmu.c:2741:9: sparse: sparse: context imbalance in 'mmu_try_to_unsync_pages' - different lock contexts for basic block
   arch/x86/kvm/mmu/mmu.c: note: in included file:
   arch/x86/kvm/mmu/paging_tmpl.h:106:24: sparse: sparse: cast truncates bits from constant value (ffffffffff000 becomes fffff000)
   arch/x86/kvm/mmu/paging_tmpl.h:426:24: sparse: sparse: cast truncates bits from constant value (ffffffffff000 becomes fffff000)
   arch/x86/kvm/mmu/mmu.c:4871:57: sparse: sparse: cast truncates bits from constant value (ffffff33 becomes 33)
   arch/x86/kvm/mmu/mmu.c:4873:56: sparse: sparse: cast truncates bits from constant value (ffffff0f becomes f)
   arch/x86/kvm/mmu/mmu.c:4875:57: sparse: sparse: cast truncates bits from constant value (ffffff55 becomes 55)

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests