Hi JC, I love your patch! Perhaps something to improve: [auto build test WARNING on tegra/for-next] [also build test WARNING on robh/for-next usb/usb-testing char-misc/char-misc-testing staging/staging-testing driver-core/driver-core-testing v5.9-rc3 next-20200828] [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/0day-ci/linux/commits/JC-Kuo/Tegra-XHCI-controller-ELPG-support/20200831-124234 base: https://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux.git for-next config: arm64-randconfig-r014-20200901 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c10e63677f5d20f18010f8f68c631ddc97546f7d) 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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/phy/tegra/xusb-tegra186.c:1561:5: warning: no previous prototype for function 'tegra186_xusb_padctl_remote_wake_detected' [-Wmissing-prototypes] int tegra186_xusb_padctl_remote_wake_detected(struct phy *phy) ^ drivers/phy/tegra/xusb-tegra186.c:1561:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int tegra186_xusb_padctl_remote_wake_detected(struct phy *phy) ^ static 1 warning generated. # https://github.com/0day-ci/linux/commit/405a5b91f6af8144ded6842a07a86e53f967fde2 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review JC-Kuo/Tegra-XHCI-controller-ELPG-support/20200831-124234 git checkout 405a5b91f6af8144ded6842a07a86e53f967fde2 vim +/tegra186_xusb_padctl_remote_wake_detected +1561 drivers/phy/tegra/xusb-tegra186.c 1560 > 1561 int tegra186_xusb_padctl_remote_wake_detected(struct phy *phy) 1562 { 1563 struct tegra_xusb_lane *lane; 1564 struct tegra_xusb_padctl *padctl; 1565 unsigned int index; 1566 1567 if (!phy) 1568 return 0; 1569 1570 lane = phy_get_drvdata(phy); 1571 padctl = lane->pad->padctl; 1572 index = lane->index; 1573 1574 if (is_utmi_phy(phy)) 1575 return tegra186_utmi_phy_remote_wake_detected(padctl, index); 1576 else if (is_usb3_phy(phy)) 1577 return tegra186_usb3_phy_remote_wake_detected(padctl, index); 1578 else 1579 return -EINVAL; 1580 } 1581 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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