[xilinx-xlnx:xlnx_rebase_v5.15_LTS 498/1197] include/vdso/bits.h:7:40: warning: left shift count >= width of type

Hi Harini,

FYI, the error/warning still remains.

tree:   https://github.com/Xilinx/linux-xlnx xlnx_rebase_v5.15_LTS
head:   1e67f149fb5eb4f5eb4e0d4f69194eac6d2497d7
commit: 98c6cc90c5d398e87b8602a47eb26f9702064a0d [498/1197] ptp: Add Xilinx PTP timer driver
config: mips-allmodconfig
compiler: mips-linux-gcc (GCC) 11.3.0
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/Xilinx/linux-xlnx/commit/98c6cc90c5d398e87b8602a47eb26f9702064a0d
        git remote add xilinx-xlnx https://github.com/Xilinx/linux-xlnx
        git fetch --no-tags xilinx-xlnx xlnx_rebase_v5.15_LTS
        git checkout 98c6cc90c5d398e87b8602a47eb26f9702064a0d
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/gpu/drm/xlnx/ drivers/media/platform/xilinx/ drivers/phy/xilinx/ drivers/ptp/ drivers/staging/ drivers/uio/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <redacted>

All warnings (new ones prefixed by >>):

   In file included from include/linux/ratelimit_types.h:5,
                    from include/linux/ratelimit.h:5,
                    from include/linux/dev_printk.h:16,
                    from include/linux/device.h:15,
                    from drivers/ptp/ptp_xilinx.c:8:
   drivers/ptp/ptp_xilinx.c: In function 'xlnx_tod_read':
   include/linux/bits.h:36:18: warning: right shift count is negative [-Wshift-count-negative]
      36 |          (~UL(0) >> (BITS_PER_LONG - 1 - (h))))
         |                  ^~
   include/linux/bits.h:38:38: note: in expansion of macro '__GENMASK'
      38 |         (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
         |                                      ^~~~~~~~~
   drivers/ptp/ptp_xilinx.c:53:41: note: in expansion of macro 'GENMASK'
      53 | #define XPTPTIMER_MAX_SEC_MASK          GENMASK(XPTPTIMER_MAX_SEC_SIZE - 1, 0)
         |                                         ^~~~~~~
   drivers/ptp/ptp_xilinx.c:107:51: note: in expansion of macro 'XPTPTIMER_MAX_SEC_MASK'
     107 |         ts->tv_sec = (((u64)sech << 32) | secl) & XPTPTIMER_MAX_SEC_MASK;
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/bits.h:6,
                    from include/linux/ratelimit_types.h:5,
                    from include/linux/ratelimit.h:5,
                    from include/linux/dev_printk.h:16,
                    from include/linux/device.h:15,
                    from drivers/ptp/ptp_xilinx.c:8:
   drivers/ptp/ptp_xilinx.c: In function 'xlnx_ptp_adjtime':

quoted

include/vdso/bits.h:7:40: warning: left shift count >= width of type [-Wshift-count-overflow]

       7 | #define BIT(nr)                 (UL(1) << (nr))
         |                                        ^~
   drivers/ptp/ptp_xilinx.c:55:41: note: in expansion of macro 'BIT'
      55 | #define XPTPTIMER_TOD_OFFSET_NEG        BIT(47)
         |                                         ^~~
   drivers/ptp/ptp_xilinx.c:216:24: note: in expansion of macro 'XPTPTIMER_TOD_OFFSET_NEG'
     216 |                 sign = XPTPTIMER_TOD_OFFSET_NEG;
         |                        ^~~~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/ratelimit_types.h:5,
                    from include/linux/ratelimit.h:5,
                    from include/linux/dev_printk.h:16,
                    from include/linux/device.h:15,
                    from drivers/ptp/ptp_xilinx.c:8:
   drivers/ptp/ptp_xilinx.c: In function 'xlnx_ptp_timer_probe':
   include/linux/bits.h:36:18: warning: right shift count is negative [-Wshift-count-negative]
      36 |          (~UL(0) >> (BITS_PER_LONG - 1 - (h))))
         |                  ^~
   include/linux/bits.h:38:38: note: in expansion of macro '__GENMASK'
      38 |         (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
         |                                      ^~~~~~~~~
   drivers/ptp/ptp_xilinx.c:53:41: note: in expansion of macro 'GENMASK'
      53 | #define XPTPTIMER_MAX_SEC_MASK          GENMASK(XPTPTIMER_MAX_SEC_SIZE - 1, 0)
         |                                         ^~~~~~~
   drivers/ptp/ptp_xilinx.c:347:50: note: in expansion of macro 'XPTPTIMER_MAX_SEC_MASK'
     347 |         ts.tv_sec = (((u64)sech << 32) | secl) & XPTPTIMER_MAX_SEC_MASK;
         |                                                  ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/bits.h:36:18: warning: right shift count is negative [-Wshift-count-negative]
      36 |          (~UL(0) >> (BITS_PER_LONG - 1 - (h))))
         |                  ^~
   include/linux/bits.h:38:38: note: in expansion of macro '__GENMASK'
      38 |         (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
         |                                      ^~~~~~~~~
   drivers/ptp/ptp_xilinx.c:53:41: note: in expansion of macro 'GENMASK'
      53 | #define XPTPTIMER_MAX_SEC_MASK          GENMASK(XPTPTIMER_MAX_SEC_SIZE - 1, 0)
         |                                         ^~~~~~~
   drivers/ptp/ptp_xilinx.c:353:51: note: in expansion of macro 'XPTPTIMER_MAX_SEC_MASK'
     353 |         tsp.tv_sec = (((u64)sech << 32) | secl) & XPTPTIMER_MAX_SEC_MASK;
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~


vim +7 include/vdso/bits.h

3945ff37d2f48d Vincenzo Frascino 2020-03-20  6  
3945ff37d2f48d Vincenzo Frascino 2020-03-20 @7  #define BIT(nr)			(UL(1) << (nr))
3945ff37d2f48d Vincenzo Frascino 2020-03-20  8  

:::::: The code at line 7 was first introduced by commit
:::::: 3945ff37d2f48d39fd1751d282c80176654049e4 linux/bits.h: Extract common header for vDSO

:::::: TO: Vincenzo Frascino [off-list ref]
:::::: CC: Thomas Gleixner [off-list ref]

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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