linux-kernel - Re: [hyperv:hyperv-next 5/5] drivers/net/hyperv/netvsc.c:1026:5: warning: no previous prototype for 'netvsc_dma

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Date:   Sun, 19 Dec 2021 12:31:23 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     kernel test robot <lkp@...el.com>
Cc:     Tianyu Lan <Tianyu.Lan@...rosoft.com>, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Wei Liu <wei.liu@...nel.org>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Michael Kelley <mikelley@...rosoft.com>
Subject: Re: [hyperv:hyperv-next 5/5] drivers/net/hyperv/netvsc.c:1026:5:
 warning: no previous prototype for 'netvsc_dma_map'

On Sat, Dec 18, 2021 at 12:23:30PM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git hyperv-next
> head:   19fd7ca00201c0525452dcf5a490e4b01674ef4c
> commit: 19fd7ca00201c0525452dcf5a490e4b01674ef4c [5/5] net: netvsc: Add Isolation VM support for netvsc driver
> config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20211218/202112181204.uRIUsFfa-lkp@intel.com/config)
> compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
> reproduce (this is a W=1 build):
>         # https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/commit/?id=19fd7ca00201c0525452dcf5a490e4b01674ef4c
>         git remote add hyperv https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git
>         git fetch --no-tags hyperv hyperv-next
>         git checkout 19fd7ca00201c0525452dcf5a490e4b01674ef4c
>         # save the config file to linux build tree
>         mkdir build_dir
>         make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/net/
> 
> 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 >>):
> 
> >> drivers/net/hyperv/netvsc.c:1026:5: warning: no previous prototype for 'netvsc_dma_map' [-Wmissing-prototypes]
>     1026 | int netvsc_dma_map(struct hv_device *hv_dev,
>          |     ^~~~~~~~~~~~~~

Adding static should fix this issue.

I've fixed this and the other one in hyperv-next. No need for sending new
patches.

Wei.