CC: kbuild-all(a)lists.01.org
TO: Gabriel Somlo <gsomlo@gmail.com>
CC: 0day robot <lkp@intel.com>

tree:   https://github.com/0day-ci/linux/commits/UPDATE-20201223-061018/Gabriel-Somlo/drivers-soc-litex-support-32-bit-subregisters-64-bit-CPUs/20201222-225133
head:   84b136c64cb0afb95001ebb64456bd6aacf84383
commit: 84b136c64cb0afb95001ebb64456bd6aacf84383 drivers/soc/litex: support 32-bit subregisters, 64-bit CPUs
date:   4 days ago
:::::: branch date: 4 days ago
:::::: commit date: 4 days ago
config: arm-randconfig-s032-20201221 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-184-g1b896707-dirty
        # https://github.com/0day-ci/linux/commit/84b136c64cb0afb95001ebb64456bd6aacf84383
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review UPDATE-20201223-061018/Gabriel-Somlo/drivers-soc-litex-support-32-bit-subregisters-64-bit-CPUs/20201222-225133
        git checkout 84b136c64cb0afb95001ebb64456bd6aacf84383
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm 

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


"sparse warnings: (new ones prefixed by >>)"
   drivers/soc/litex/litex_soc_ctrl.c: note: in included file:
>> include/linux/litex.h:112:23: sparse: sparse: shift too big (32) for type unsigned long
>> include/linux/litex.h:112:23: sparse: sparse: shift too big (32) for type unsigned long

vim +112 include/linux/litex.h

84b136c64cb0afb Gabriel Somlo   2020-12-22   94  
84b136c64cb0afb Gabriel Somlo   2020-12-22   95  /**
84b136c64cb0afb Gabriel Somlo   2020-12-22   96   * litex_get_reg() - Reads the value of the LiteX CSR (Control&Status Register)
84b136c64cb0afb Gabriel Somlo   2020-12-22   97   * @reg: Address of the CSR
84b136c64cb0afb Gabriel Somlo   2020-12-22   98   * @reg_size: The width of the CSR expressed in the number of bytes
84b136c64cb0afb Gabriel Somlo   2020-12-22   99   *
84b136c64cb0afb Gabriel Somlo   2020-12-22  100   * Return: Value read from the CSR
84b136c64cb0afb Gabriel Somlo   2020-12-22  101   *
84b136c64cb0afb Gabriel Somlo   2020-12-22  102   * This function generates a series of subregister reads with a proper offset
84b136c64cb0afb Gabriel Somlo   2020-12-22  103   * and joins their results into a single (possibly multi-byte) LiteX CSR value.
84b136c64cb0afb Gabriel Somlo   2020-12-22  104   */
84b136c64cb0afb Gabriel Somlo   2020-12-22  105  static inline ulong litex_get_reg(void __iomem *reg, ulong reg_size)
84b136c64cb0afb Gabriel Somlo   2020-12-22  106  {
84b136c64cb0afb Gabriel Somlo   2020-12-22  107  	ulong r;
84b136c64cb0afb Gabriel Somlo   2020-12-22  108  	u8 i;
84b136c64cb0afb Gabriel Somlo   2020-12-22  109  
84b136c64cb0afb Gabriel Somlo   2020-12-22  110  	r = _read_litex_subregister(reg);
84b136c64cb0afb Gabriel Somlo   2020-12-22  111  	for (i = 1; i < _litex_num_subregs(reg_size); i++) {
84b136c64cb0afb Gabriel Somlo   2020-12-22 @112  		r <<= LITEX_SUBREG_SIZE_BIT;
84b136c64cb0afb Gabriel Somlo   2020-12-22  113  		reg += LITEX_SUBREG_ALIGN;
84b136c64cb0afb Gabriel Somlo   2020-12-22  114  		r |= _read_litex_subregister(reg);
84b136c64cb0afb Gabriel Somlo   2020-12-22  115  	}
84b136c64cb0afb Gabriel Somlo   2020-12-22  116  	return r;
84b136c64cb0afb Gabriel Somlo   2020-12-22  117  }
22447a99c97e353 Pawel Czarnecki 2020-10-13  118  

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0-DAY CI Kernel Test Service, Intel Corporation
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