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Date:   Thu, 22 Jul 2021 11:03:44 +0800
From:   "Zhu, Lingshan" <lingshan.zhu@...el.com>
To:     Like Xu <like.xu.linux@...il.com>
Cc:     bp@...en8.de, seanjc@...gle.com, vkuznets@...hat.com,
        wanpengli@...cent.com, jmattson@...gle.com, joro@...tes.org,
        kan.liang@...ux.intel.com, ak@...ux.intel.com,
        wei.w.wang@...el.com, eranian@...gle.com, liuxiangdong5@...wei.com,
        linux-kernel@...r.kernel.org, x86@...nel.org, kvm@...r.kernel.org,
        boris.ostrvsky@...cle.com, Like Xu <like.xu@...ux.intel.com>,
        Will Deacon <will@...nel.org>, Marc Zyngier <maz@...nel.org>,
        Guo Ren <guoren@...nel.org>, Nick Hu <nickhu@...estech.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-csky@...r.kernel.org, linux-riscv@...ts.infradead.org,
        xen-devel@...ts.xenproject.org,
        Peter Zijlstra <peterz@...radead.org>,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: [PATCH V8 01/18] perf/core: Use static_call to optimize
 perf_guest_info_callbacks



On 7/21/2021 7:57 PM, Like Xu wrote:
> On 16/7/2021 4:53 pm, Zhu Lingshan wrote:
>> +    } else if (xenpmu_data->pmu.r.regs.cpl & 3)
>
> Lingshan, serious for this version ?
>
> arch/x86/xen/pmu.c:438:9: error: expected identifier or ‘(’ before 
> ‘return’
>   438 |         return state;
>       |         ^~~~~~
> arch/x86/xen/pmu.c:439:1: error: expected identifier or ‘(’ before ‘}’ 
> token
>   439 | }
>       | ^
> arch/x86/xen/pmu.c: In function ‘xen_guest_state’:
> arch/x86/xen/pmu.c:436:9: error: control reaches end of non-void 
> function [-Werror=return-type]
>   436 |         }
>       |         ^
> cc1: some warnings being treated as errors
>
>> +            state |= PERF_GUEST_USER;
>>       }
forgot to enable XEN build in .config, V9 fixes this will come soon

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