[gpio:ib-for-each-clump 4/4] include/linux/bitmap.h:639:45: sparse: sparse: shift too big (64) for type unsigned long

[kernel test robot <lkp@intel.com>]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git ib-for-each-clump
head:   3358c938236d6a1be51124fbbb2698e50689d382
commit: 3358c938236d6a1be51124fbbb2698e50689d382 [4/4] gpio: xilinx: Utilize generic bitmap_get_value and _set_value.
config: alpha-randconfig-s031-20200716 (attached as .config)
compiler: alpha-linux-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: v0.6.2-49-g707c5017-dirty
        git checkout 3358c938236d6a1be51124fbbb2698e50689d382
        # 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=alpha 

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 >>)

>> include/linux/bitmap.h:639:45: sparse: sparse: shift too big (64) for type unsigned long
>> include/linux/bitmap.h:639:45: sparse: sparse: shift too big (64) for type unsigned long
   include/linux/bitmap.h:594:63: sparse: sparse: shift too big (64) for type unsigned long
>> include/linux/bitmap.h:639:45: sparse: sparse: shift too big (64) for type unsigned long
>> include/linux/bitmap.h:638:17: sparse: sparse: invalid access past the end of 'old' (8 8)

vim +639 include/linux/bitmap.h

169c474fb22d8a5 William Breathitt Gray 2019-12-04  613  
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  614  /**
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  615   * bitmap_set_value - set n-bit value within a memory region
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  616   * @map: address to the bitmap memory region
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  617   * @value: value of nbits
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  618   * @start: bit offset of the n-bit value
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  619   * @nbits: size of value in bits
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  620   */
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  621  static inline void bitmap_set_value(unsigned long *map,
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  622  				    unsigned long value,
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  623  				    unsigned long start, unsigned long nbits)
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  624  {
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  625  	const size_t index = BIT_WORD(start);
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  626  	const unsigned long offset = start % BITS_PER_LONG;
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  627  	const unsigned long ceiling = roundup(start + 1, BITS_PER_LONG);
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  628  	const unsigned long space = ceiling - start;
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  629  
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  630  	value &= GENMASK(nbits - 1, 0);
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  631  
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  632  	if (space >= nbits) {
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  633  		map[index] &= ~(GENMASK(nbits + offset - 1, offset));
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  634  		map[index] |= value << offset;
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  635  	} else {
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  636  		map[index] &= ~BITMAP_FIRST_WORD_MASK(start);
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  637  		map[index] |= value << offset;
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27 @638  		map[index + 1] &= ~BITMAP_LAST_WORD_MASK(start + nbits);
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27 @639  		map[index + 1] |= (value >> space);
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  640  	}
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  641  }
e77c9b6f35c4bdf Syed Nayyar Waris      2020-06-27  642  

:::::: The code at line 639 was first introduced by commit
:::::: e77c9b6f35c4bdfa60c52f137a4b48c04ab87627 bitops: Introduce the for_each_set_clump macro

:::::: TO: Syed Nayyar Waris <syednwaris@gmail.com>
:::::: CC: Linus Walleij <linus.walleij@linaro.org>

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

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