linux-kernel - Re: [PATCH v3 2/2] spi: loongson: add bus driver for the loongson spi controller

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Message-ID: <5de5ca5f-d920-9ed9-a6d2-983a46d3b740@loongson.cn>
Date:   Mon, 27 Mar 2023 15:47:38 +0800
From:   zhuyinbo <zhuyinbo@...ngson.cn>
To:     kernel test robot <lkp@...el.com>, Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-spi@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     oe-kbuild-all@...ts.linux.dev, Jianmin Lv <lvjianmin@...ngson.cn>,
        wanghongliang@...ngson.cn, Liu Peibao <liupeibao@...ngson.cn>,
        loongson-kernel@...ts.loongnix.cn, zhuyinbo@...ngson.cn
Subject: Re: [PATCH v3 2/2] spi: loongson: add bus driver for the loongson spi
 controller



在 2023/3/25 上午5:53, kernel test robot 写道:
> Hi Yinbo,
> 
> I love your patch! Yet something to improve:
> 
> [auto build test ERROR on broonie-spi/for-next]
> [also build test ERROR on robh/for-next krzk-dt/for-next linus/master v6.3-rc3 next-20230324]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Yinbo-Zhu/dt-bindings-spi-add-loongson-spi/20230324-143432
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
> patch link:    https://lore.kernel.org/r/20230324063317.14664-3-zhuyinbo%40loongson.cn
> patch subject: [PATCH v3 2/2] spi: loongson: add bus driver for the loongson spi controller
> config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20230325/202303250536.OV1LR58y-lkp@intel.com/config)
> compiler: powerpc-linux-gcc (GCC) 12.1.0
> 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/intel-lab-lkp/linux/commit/3742622c455d25c4a110d2caf2f5b2ceefe88f91
>          git remote add linux-review https://github.com/intel-lab-lkp/linux
>          git fetch --no-tags linux-review Yinbo-Zhu/dt-bindings-spi-add-loongson-spi/20230324-143432
>          git checkout 3742622c455d25c4a110d2caf2f5b2ceefe88f91
>          # save the config file
>          mkdir build_dir && cp config build_dir/.config
>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash
> 
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@...el.com>
> | Link: https://lore.kernel.org/oe-kbuild-all/202303250536.OV1LR58y-lkp@intel.com/
> 
> All errors (new ones prefixed by >>, old ones prefixed by <<):
> 
>>> ERROR: modpost: "loongson_spi_dev_pm_ops" [drivers/spi/spi-loongson-pci.ko] undefined!
>>> ERROR: modpost: "loongson_spi_dev_pm_ops" [drivers/spi/spi-loongson-plat.ko] undefined!
> 
This compile issue when spi config was set as module then 
"loongson_spi_dev_pm_ops undefined" will occur, but if set spi config as 
built-in and not this issue, and my patch was tested that use spi config 
built-in so not this error occur,  and this compile fail issue's reason 
was "loongson_spi_dev_pm_ops" not use EXPORT_SYMBOL_GPL to export, I 
will add following change to fix this compile error issue.

--- a/drivers/spi/spi-loongson-core.c
+++ b/drivers/spi/spi-loongson-core.c
@@ -297,6 +297,7 @@ const struct dev_pm_ops loongson_spi_dev_pm_ops = {
         .suspend = loongson_spi_suspend,
         .resume = loongson_spi_resume,
  };
+EXPORT_SYMBOL_GPL(loongson_spi_dev_pm_ops);