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    SubjectRe: [PATCH v2 3/3] clk: X1000: Add support for calculat REFCLK of USB PHY.
    Hi "周琰杰,

    Thank you for the patch! Yet something to improve:

    [auto build test ERROR on clk/clk-next]
    [also build test ERROR on linux/master linus/master v5.8-rc3 next-20200629]
    [If your patch is applied to the wrong git tree, kindly drop us a note.
    And when submitting patch, we suggest to use as documented in
    https://git-scm.com/docs/git-format-patch]

    url: https://github.com/0day-ci/linux/commits/Zhou-Yanjie/Add-functions-to-operate-USB-PHY-related-clock/20200629-011858
    base: https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-next
    config: mips-randconfig-r012-20200629 (attached as .config)
    compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project a28d38a6bca1726d56c9b373f4c7dc5264fc7716)
    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 mips cross compiling tool for clang build
    # apt-get install binutils-mips-linux-gnu
    # save the attached .config to linux build tree
    COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips

    If you fix the issue, kindly add following tag as appropriate
    Reported-by: kernel test robot <lkp@intel.com>

    All errors (new ones prefixed by >>):

    >> drivers/clk/ingenic/x1000-cgu.c:83:2: error: expected expression
    WARN();
    ^
    include/asm-generic/bug.h:127:34: note: expanded from macro 'WARN'
    int __ret_warn_on = !!(condition); \
    ^
    >> drivers/clk/ingenic/x1000-cgu.c:83:2: error: expected expression
    include/asm-generic/bug.h:129:3: note: expanded from macro 'WARN'
    __WARN_printf(TAINT_WARN, format); \
    ^
    include/asm-generic/bug.h:88:51: note: expanded from macro '__WARN_printf'
    warn_slowpath_fmt(__FILE__, __LINE__, taint, arg); \
    ^
    2 errors generated.

    vim +83 drivers/clk/ingenic/x1000-cgu.c

    62
    63 static unsigned long x1000_otg_phy_recalc_rate(struct clk_hw *hw,
    64 unsigned long parent_rate)
    65 {
    66 u32 usbpcr1;
    67 unsigned refclk_div;
    68
    69 usbpcr1 = readl(cgu->base + CGU_REG_USBPCR1);
    70 refclk_div = usbpcr1 & USBPCR1_REFCLKDIV_MASK;
    71
    72 switch (refclk_div) {
    73 case USBPCR1_REFCLKDIV_12:
    74 return 12000000;
    75
    76 case USBPCR1_REFCLKDIV_24:
    77 return 48000000;
    78
    79 case USBPCR1_REFCLKDIV_48:
    80 return 48000000;
    81 }
    82
    > 83 WARN();
    84 return parent_rate;
    85 }
    86

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