linux-kernel - Re: [PATCH net-next v4 1/2] net: Add a WWAN subsystem

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Date:   Fri, 12 Mar 2021 02:52:27 +0800
From:   kernel test robot <lkp@...el.com>
To:     Loic Poulain <loic.poulain@...aro.org>, kuba@...nel.org,
        davem@...emloft.net, gregkh@...uxfoundation.org
Cc:     kbuild-all@...ts.01.org, linux-arm-msm@...r.kernel.org,
        aleksander@...ksander.es, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, bjorn.andersson@...aro.org,
        manivannan.sadhasivam@...aro.org, hemantk@...eaurora.org
Subject: Re: [PATCH net-next v4 1/2] net: Add a WWAN subsystem

Hi Loic,

I love your patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Loic-Poulain/net-Add-a-WWAN-subsystem/20210312-003256
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 34bb975126419e86bc3b95e200dc41de6c6ca69c
config: m68k-allmodconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/259571a34d6f035f99a8343c5fcd12b6dfc92c40
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Loic-Poulain/net-Add-a-WWAN-subsystem/20210312-003256
        git checkout 259571a34d6f035f99a8343c5fcd12b6dfc92c40
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=m68k 

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/wwan/wwan_core.c:22:21: warning: no previous prototype for '__wwan_find_by_parent' [-Wmissing-prototypes]
      22 | struct wwan_device *__wwan_find_by_parent(struct device *parent)
         |                     ^~~~~~~~~~~~~~~~~~~~~


vim +/__wwan_find_by_parent +22 drivers/net/wwan/wwan_core.c

    21	
  > 22	struct wwan_device *__wwan_find_by_parent(struct device *parent)
    23	{
    24		struct wwan_device *wwandev;
    25	
    26		if (!parent)
    27			return NULL;
    28	
    29		list_for_each_entry(wwandev, &wwan_list, list) {
    30			if (wwandev->dev.parent == parent)
    31				return wwandev;
    32		}
    33	
    34		return NULL;
    35	}
    36	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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