Adding patch author to CC.

Hi Qii Wang,

can you send an incremental patch to replace the 64-bit division with
either do_div() or some apropriate div64_* function?

While there, it might also be good to double check if the divisor is
always non-zero to prevent "division by zero" OOPSes, if you haven't
done this already.

Thanks,

   Wolfram


On Sat, May 16, 2020 at 08:40:16AM +0800, kbuild test robot wrote:
> tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git  i2c/for-next
> branch HEAD: 41895bfee70e7b8a5af7deae458fbf02c1fe782a  Merge branch 'i2c/for-current-fixed' into i2c/for-next
> 
> Error/Warning in current branch:
> 
> arm-linux-gnueabi-ld: i2c-mt65xx.c:(.text+0xa34): undefined reference to `__aeabi_ldivmod'
> i2c-mt65xx.c:(.text+0x3e5): undefined reference to `__divdi3'
> i2c-mt65xx.c:(.text+0x532): undefined reference to `__divdi3'
> i2c-mt65xx.c:(.text+0x5d2): undefined reference to `__divdi3'
> i2c-mt65xx.c:(.text+0x9ac): undefined reference to `__aeabi_ldivmod'
> i2c-mt65xx.c:(.text.mtk_i2c_calculate_speed+0x2d4): undefined reference to `__divdi3'
> ld: i2c-mt65xx.c:(.text+0x60f): undefined reference to `__divdi3'
> m68k-linux-ld: i2c-mt65xx.c:(.text+0x57e): undefined reference to `__divdi3'
> mips-linux-ld: i2c-mt65xx.c:(.text.mtk_i2c_calculate_speed+0x368): undefined reference to `__divdi3'
> 
> Error/Warning ids grouped by kconfigs:
> 
> recent_errors
> |-- arm-allyesconfig
> |   |-- arm-linux-gnueabi-ld:i2c-mt65xx.c:(.text):undefined-reference-to-__aeabi_ldivmod
> |   `-- i2c-mt65xx.c:(.text):undefined-reference-to-__aeabi_ldivmod
> |-- h8300-allyesconfig
> |   `-- i2c-mt65xx.c:(.text):undefined-reference-to-__divdi3
> |-- i386-allyesconfig
> |   |-- i2c-mt65xx.c:(.text):undefined-reference-to-__divdi3
> |   `-- ld:i2c-mt65xx.c:(.text):undefined-reference-to-__divdi3
> |-- m68k-allyesconfig
> |   |-- i2c-mt65xx.c:(.text):undefined-reference-to-__divdi3
> |   `-- m68k-linux-ld:i2c-mt65xx.c:(.text):undefined-reference-to-__divdi3
> `-- mips-allyesconfig
>     |-- i2c-mt65xx.c:(.text.mtk_i2c_calculate_speed):undefined-reference-to-__divdi3
>     `-- mips-linux-ld:i2c-mt65xx.c:(.text.mtk_i2c_calculate_speed):undefined-reference-to-__divdi3
> 
> elapsed time: 482m
> 
> configs tested: 109
> configs skipped: 3
> 
> arm                                 defconfig
> arm                              allyesconfig
> arm                              allmodconfig
> arm                               allnoconfig
> arm64                            allyesconfig
> arm64                               defconfig
> arm64                            allmodconfig
> arm64                             allnoconfig
> sparc                            allyesconfig
> m68k                             allyesconfig
> mips                             allyesconfig
> arm                         at91_dt_defconfig
> arm                           sama5_defconfig
> arm                        realview_defconfig
> arm                       spear13xx_defconfig
> powerpc                     pq2fads_defconfig
> c6x                        evmc6678_defconfig
> parisc                              defconfig
> arm                            u300_defconfig
> powerpc                         ps3_defconfig
> arm                         bcm2835_defconfig
> arm                           spitz_defconfig
> arm                           tegra_defconfig
> i386                             allyesconfig
> i386                                defconfig
> i386                              debian-10.3
> i386                              allnoconfig
> ia64                             allmodconfig
> ia64                                defconfig
> ia64                              allnoconfig
> ia64                             allyesconfig
> m68k                             allmodconfig
> m68k                              allnoconfig
> m68k                           sun3_defconfig
> m68k                                defconfig
> nios2                               defconfig
> nios2                            allyesconfig
> openrisc                            defconfig
> c6x                              allyesconfig
> c6x                               allnoconfig
> openrisc                         allyesconfig
> nds32                               defconfig
> nds32                             allnoconfig
> csky                             allyesconfig
> csky                                defconfig
> alpha                               defconfig
> alpha                            allyesconfig
> xtensa                           allyesconfig
> h8300                            allyesconfig
> h8300                            allmodconfig
> xtensa                              defconfig
> arc                                 defconfig
> arc                              allyesconfig
> sh                               allmodconfig
> sh                                allnoconfig
> microblaze                        allnoconfig
> mips                              allnoconfig
> mips                             allmodconfig
> parisc                            allnoconfig
> parisc                           allyesconfig
> parisc                           allmodconfig
> powerpc                             defconfig
> powerpc                          allyesconfig
> powerpc                          rhel-kconfig
> powerpc                          allmodconfig
> powerpc                           allnoconfig
> i386                 randconfig-a006-20200515
> i386                 randconfig-a005-20200515
> i386                 randconfig-a003-20200515
> i386                 randconfig-a001-20200515
> i386                 randconfig-a004-20200515
> i386                 randconfig-a002-20200515
> i386                 randconfig-a012-20200515
> i386                 randconfig-a016-20200515
> i386                 randconfig-a014-20200515
> i386                 randconfig-a011-20200515
> i386                 randconfig-a013-20200515
> i386                 randconfig-a015-20200515
> x86_64               randconfig-a005-20200515
> x86_64               randconfig-a003-20200515
> x86_64               randconfig-a006-20200515
> x86_64               randconfig-a004-20200515
> x86_64               randconfig-a001-20200515
> x86_64               randconfig-a002-20200515
> riscv                            allyesconfig
> riscv                             allnoconfig
> riscv                               defconfig
> riscv                            allmodconfig
> s390                             allyesconfig
> s390                              allnoconfig
> s390                             allmodconfig
> s390                                defconfig
> x86_64                              defconfig
> sparc                               defconfig
> sparc64                             defconfig
> sparc64                           allnoconfig
> sparc64                          allyesconfig
> sparc64                          allmodconfig
> um                               allmodconfig
> um                                allnoconfig
> um                               allyesconfig
> um                                  defconfig
> x86_64                                   rhel
> x86_64                               rhel-7.6
> x86_64                    rhel-7.6-kselftests
> x86_64                         rhel-7.2-clear
> x86_64                                    lkp
> x86_64                              fedora-25
> x86_64                                  kexec
> 
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org