Hi Jianjun, I love your patch! Yet something to improve: [auto build test ERROR on robh/for-next] [also build test ERROR on linus/master v5.18-rc3 next-20220421] [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] url: https://github.com/intel-lab-lkp/linux/commits/Jianjun-Wang/phy-mediatek-Add-PCIe-PHY-driver/20220422-121407 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next config: arc-allyesconfig (https://download.01.org/0day-ci/archive/20220422/202204221513.SZZHW8dq-lkp@xxxxxxxxx/config) compiler: arceb-elf-gcc (GCC) 11.2.0 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/c2ea770ff29995df64bc82ad12ece5b671415a62 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Jianjun-Wang/phy-mediatek-Add-PCIe-PHY-driver/20220422-121407 git checkout c2ea770ff29995df64bc82ad12ece5b671415a62 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): drivers/phy/mediatek/phy-mtk-pcie.c: In function 'mtk_pcie_efuse_set_lane': >> drivers/phy/mediatek/phy-mtk-pcie.c:92:29: error: implicit declaration of function 'FIELD_PREP' [-Werror=implicit-function-declaration] 92 | FIELD_PREP(EFUSE_LN_TX_PMOS_SEL, data->tx_pmos)); | ^~~~~~~~~~ cc1: some warnings being treated as errors vim +/FIELD_PREP +92 drivers/phy/mediatek/phy-mtk-pcie.c 78 79 static void mtk_pcie_efuse_set_lane(struct mtk_pcie_phy *pcie_phy, 80 unsigned int lane) 81 { 82 struct mtk_pcie_lane_efuse *data = &pcie_phy->efuse[lane]; 83 void __iomem *addr; 84 85 if (!data->lane_efuse_supported) 86 return; 87 88 addr = pcie_phy->sif_base + PEXTP_ANA_LN0_TRX_REG + 89 lane * PEXTP_ANA_LANE_OFFSET; 90 91 mtk_phy_update_bits(addr + PEXTP_ANA_TX_REG, EFUSE_LN_TX_PMOS_SEL, > 92 FIELD_PREP(EFUSE_LN_TX_PMOS_SEL, data->tx_pmos)); 93 94 mtk_phy_update_bits(addr + PEXTP_ANA_TX_REG, EFUSE_LN_TX_NMOS_SEL, 95 FIELD_PREP(EFUSE_LN_TX_NMOS_SEL, data->tx_nmos)); 96 97 mtk_phy_update_bits(addr + PEXTP_ANA_RX_REG, EFUSE_LN_RX_SEL, 98 FIELD_PREP(EFUSE_LN_RX_SEL, data->rx_data)); 99 } 100 -- 0-DAY CI Kernel Test Service https://01.org/lkp