Re: [kvm:queue 27/38] arch/x86/kvm/hyperv.c:186:41: sparse: incorrect type in argument 2 (different modifiers)

["Denis V. Lunev" <den@openvz.org>]

On 09/18/2015 04:39 PM, kbuild test robot wrote:
> tree:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue
> head:   ed393e4134de0dd02d8ba98ca8ce3ae65d1eb567
> commit: 46f4c309534b10ca1026273abe38955d3cff4023 [27/38] kvm/x86: Hyper-V HV_X64_MSR_VP_RUNTIME support
> reproduce:
>    # apt-get install sparse
>    git checkout 46f4c309534b10ca1026273abe38955d3cff4023
>    make ARCH=x86_64 allmodconfig
>    make C=1 CF=-D__CHECK_ENDIAN__
>
>
> sparse warnings: (new ones prefixed by >>)
>
>>> arch/x86/kvm/hyperv.c:186:41: sparse: incorrect type in argument 2 (different modifiers)
>     arch/x86/kvm/hyperv.c:186:41:    expected unsigned long [nocast] [usertype] *ut
>     arch/x86/kvm/hyperv.c:186:41:    got unsigned long *<noident>
>>> arch/x86/kvm/hyperv.c:186:41: sparse: implicit cast to nocast type
>>> arch/x86/kvm/hyperv.c:186:49: sparse: incorrect type in argument 3 (different modifiers)
>     arch/x86/kvm/hyperv.c:186:49:    expected unsigned long [nocast] [usertype] *st
>     arch/x86/kvm/hyperv.c:186:49:    got unsigned long *<noident>
>     arch/x86/kvm/hyperv.c:186:49: sparse: implicit cast to nocast type
>
> vim +186 arch/x86/kvm/hyperv.c
>
>     170				kvm_make_request(KVM_REQ_HV_RESET, vcpu);
>     171			}
>     172			break;
>     173		default:
>     174			vcpu_unimpl(vcpu, "Hyper-V uhandled wrmsr: 0x%x data 0x%llx\n",
>     175				    msr, data);
>     176			return 1;
>     177		}
>     178		return 0;
>     179	}
>     180	
>     181	/* Calculate cpu time spent by current task in 100ns units */
>     182	static u64 current_task_runtime_100ns(void)
>     183	{
>     184		cputime_t utime, stime;
>     185	
>   > 186		task_cputime_adjusted(current, &utime, &stime);
>     187		return div_u64(cputime_to_nsecs(utime + stime), 100);
>     188	}
>     189	
>     190	static int kvm_hv_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
>     191	{
>     192		struct kvm_vcpu_hv *hv = &vcpu->arch.hyperv;
>     193	
>     194		switch (msr) {
>
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
can not get an idea what is this warning about...
For me it looks pretty lame.

Den