linux-kernel - arch/x86/kvm/../../../virt/kvm/kvm_main.c:4326:17: sparse: struct kvm_vcpu Documentation Kbuild Makefile crypto include sound usr <asn:3> kvm_get_running

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Date:   Thu, 2 Jul 2020 17:18:48 +0800
From:   kernel test robot <lkp@...el.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Peter Xu <peterx@...hat.com>
Subject: arch/x86/kvm/../../../virt/kvm/kvm_main.c:4326:17: sparse: struct
 kvm_vcpu Documentation Kbuild Makefile crypto include sound usr <asn:3>
 kvm_get_running_vcpus( ... )

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   cd77006e01b3198c75fb7819b3d0ff89709539bb
commit: 7495e22bb165e7030bae4d9c6e84addb5ea17b29 KVM: Move running VCPU from ARM to common code
date:   5 months ago
config: x86_64-randconfig-s031-20200701 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-14) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.2-3-gfa153962-dirty
        git checkout 7495e22bb165e7030bae4d9c6e84addb5ea17b29
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 

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


sparse warnings: (new ones prefixed by >>)

   arch/x86/kvm/../../../virt/kvm/kvm_main.c:3023:57: sparse: sparse: cast removes address space '<asn:1>' of expression
   arch/x86/kvm/../../../virt/kvm/kvm_main.c:3023:57: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected struct compat_sigset_t const [noderef] [usertype] <asn:1> *compat @@     got void * @@
   arch/x86/kvm/../../../virt/kvm/kvm_main.c:3023:57: sparse:     expected struct compat_sigset_t const [noderef] [usertype] <asn:1> *compat
   arch/x86/kvm/../../../virt/kvm/kvm_main.c:3023:57: sparse:     got void *
   arch/x86/kvm/../../../virt/kvm/kvm_main.c:4326:17: sparse: sparse: symbol 'kvm_get_running_vcpus' redeclared with different type (different address spaces):
>> arch/x86/kvm/../../../virt/kvm/kvm_main.c:4326:17: sparse:    struct kvm_vcpu *[noderef] <asn:3> *extern [addressable] [toplevel] kvm_get_running_vcpus( ... )
   include/linux/kvm_host.h:1339:26: sparse: note: previously declared as:
   include/linux/kvm_host.h:1339:26: sparse:    struct kvm_vcpu [noderef] <asn:3> **extern [addressable] [toplevel] kvm_get_running_vcpus( ... )

vim +4326 arch/x86/kvm/../../../virt/kvm/kvm_main.c

  4322	
  4323	/**
  4324	 * kvm_get_running_vcpus - get the per-CPU array of currently running vcpus.
  4325	 */
> 4326	struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void)
  4327	{
  4328	        return &kvm_running_vcpu;
  4329	}
  4330	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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