linux-kernel - Re: [PATCH v4 15/17] x86/hyperv: implement an MSI domain for root partition

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Message-ID: <20210107150557.2pa3qsd4qbni4iaa@liuwe-devbox-debian-v2>
Date:   Thu, 7 Jan 2021 15:05:58 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     kernel test robot <lkp@...el.com>
Cc:     Wei Liu <wei.liu@...nel.org>,
        Linux on Hyper-V List <linux-hyperv@...r.kernel.org>,
        kbuild-all@...ts.01.org, virtualization@...ts.linux-foundation.org,
        Linux Kernel List <linux-kernel@...r.kernel.org>,
        Michael Kelley <mikelley@...rosoft.com>,
        Vineeth Pillai <viremana@...ux.microsoft.com>,
        Sunil Muthuswamy <sunilmut@...rosoft.com>,
        Nuno Das Neves <nunodasneves@...ux.microsoft.com>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>
Subject: Re: [PATCH v4 15/17] x86/hyperv: implement an MSI domain for root
 partition

On Thu, Jan 07, 2021 at 06:21:24AM +0800, kernel test robot wrote:
> Hi Wei,
> 
> I love your patch! Perhaps something to improve:
> 
> [auto build test WARNING on e71ba9452f0b5b2e8dc8aa5445198cd9214a6a62]
> 
> url:    https://github.com/0day-ci/linux/commits/Wei-Liu/Introducing-Linux-root-partition-support-for-Microsoft-Hypervisor/20210107-044149
> base:    e71ba9452f0b5b2e8dc8aa5445198cd9214a6a62
> config: i386-randconfig-m021-20210106 (attached as .config)
> compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
> reproduce (this is a W=1 build):
>         # https://github.com/0day-ci/linux/commit/376aee69c6ab18dc23b0386590bee82d59555be8
>         git remote add linux-review https://github.com/0day-ci/linux
>         git fetch --no-tags linux-review Wei-Liu/Introducing-Linux-root-partition-support-for-Microsoft-Hypervisor/20210107-044149
>         git checkout 376aee69c6ab18dc23b0386590bee82d59555be8
>         # save the attached .config to linux build tree
>         make W=1 ARCH=i386 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
> 
> All warnings (new ones prefixed by >>):
> 
> >> arch/x86/hyperv/irqdomain.c:317:28: warning: no previous prototype for 'hv_create_pci_msi_domain' [-Wmissing-prototypes]
>      317 | struct irq_domain * __init hv_create_pci_msi_domain(void)
>          |                            ^~~~~~~~~~~~~~~~~~~~~~~~
> 
> 
> vim +/hv_create_pci_msi_domain +317 arch/x86/hyperv/irqdomain.c

I've fixed this locally by moving the prototype to a header file --
previously it was left in a C file.

Wei.