linux-kernel - Re: [PATCH v2 2/2] KVM: X86: Add Force Emulation Prefix for "emulate the next instruction"

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Date:   Wed, 28 Mar 2018 05:15:58 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Wanpeng Li <kernellwp@...il.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Andrew Cooper <andrew.cooper3@...rix.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Liran Alon <liran.alon@...cle.com>
Subject: Re: [PATCH v2 2/2] KVM: X86: Add Force Emulation Prefix for "emulate
 the next instruction"

Hi Wanpeng,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on kvm/linux-next]
[also build test WARNING on next-20180327]
[cannot apply to v4.16-rc7]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Wanpeng-Li/KVM-X86-Add-Force-Emulation-Prefix-for-emulate-the-next-instruction/20180328-025804
base:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

>> arch/x86/kvm/x86.c:149:20: sparse: symbol 'force_emulation_prefix' was not declared. Should it be static?
   arch/x86/kvm/x86.c:2196:38: sparse: incorrect type in argument 1 (different address spaces) @@    expected void const [noderef] <asn:1>*<noident> @@    got d const [noderef] <asn:1>*<noident> @@
   arch/x86/kvm/x86.c:2196:38:    expected void const [noderef] <asn:1>*<noident>
   arch/x86/kvm/x86.c:2196:38:    got unsigned char [usertype] *
   arch/x86/kvm/x86.c:7911:5: sparse: symbol 'kvm_valid_sregs' was not declared. Should it be static?
   arch/x86/kvm/x86.c:8786:16: sparse: incompatible types in comparison expression (different address spaces)
   arch/x86/include/asm/paravirt.h:783:9: sparse: context imbalance in 'vcpu_enter_guest' - unexpected unlock

Please review and possibly fold the followup patch.

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