linux-kernel - drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c:362:19: warning: unused function 'dsi

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Message-ID: <202301182053.u5GGxLuQ-lkp@intel.com>
Date:   Wed, 18 Jan 2023 20:09:50 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org, Heiko Stuebner <heiko@...ech.de>
Subject: drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c:362:19: warning:
 unused function 'dsi_read'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c1649ec55708ae42091a2f1bca1ab49ecd722d55
commit: 3daf391fee830f2343cc6b1ba131b1b5115dea1f drm/rockchip: dsi: Remove the unused function dsi_update_bits()
date:   3 months ago
config: arm64-randconfig-r036-20230116
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 4196ca3278f78c6e19246e54ab0ecb364e37d66a)
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
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3daf391fee830f2343cc6b1ba131b1b5115dea1f
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 3daf391fee830f2343cc6b1ba131b1b5115dea1f
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/gpu/drm/rockchip/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c:362:19: warning: unused function 'dsi_read' [-Wunused-function]
   static inline u32 dsi_read(struct dw_mipi_dsi_rockchip *dsi, u32 reg)
                     ^
   1 warning generated.


vim +/dsi_read +362 drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c

2d4f7bdafd709a Nickey Yang 2018-10-01  361  
2d4f7bdafd709a Nickey Yang 2018-10-01 @362  static inline u32 dsi_read(struct dw_mipi_dsi_rockchip *dsi, u32 reg)
2d4f7bdafd709a Nickey Yang 2018-10-01  363  {
2d4f7bdafd709a Nickey Yang 2018-10-01  364  	return readl(dsi->base + reg);
2d4f7bdafd709a Nickey Yang 2018-10-01  365  }
2d4f7bdafd709a Nickey Yang 2018-10-01  366  

:::::: The code at line 362 was first introduced by commit
:::::: 2d4f7bdafd709a5cf38f42358bd4c31c621a3e1b drm/rockchip: dsi: migrate to use dw-mipi-dsi bridge driver

:::::: TO: Nickey Yang <nickey.yang@...k-chips.com>
:::::: CC: Andrzej Hajda <a.hajda@...sung.com>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests

View attachment "config" of type "text/plain" (184809 bytes)