On Thu, Jul 02, 2020 at 05:18:48PM +0800, kernel test robot wrote:
> 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 <[email protected]>
>
>
> 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
Not the first time got confused with this report - this seems to have been
fixed by fcd07f9adc7d ("KVM: let declaration of kvm_get_running_vcpus match
implementation", 2020-02-28) already...
--
Peter Xu
