drivers/iio/common/scmi_sensors/scmi_iio.c:247:1-7: WARNING: do_div() does a 64-by-32 division, please consider using div64_u64 instead.
From: kernel test robot
Date: Wed Jun 03 2026 - 14:36:23 EST
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: ba3e43a9e601636f5edb54e259a74f96ca3b8fd8
commit: a0e2cb6a90634f3dc80f16e882a683ee5761b0b0 um: Add VFIO-based virtual PCI driver
date: 1 year, 1 month ago
config: um-randconfig-r052-20260603 (https://download.01.org/0day-ci/archive/20260604/202606040245.XfmRpBhA-lkp@xxxxxxxxx/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project e5ab4f8a1f766febdc65ce89c00dec85393cfd68)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Fixes: a0e2cb6a9063 ("um: Add VFIO-based virtual PCI driver")
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202606040245.XfmRpBhA-lkp@xxxxxxxxx/
cocci warnings: (new ones prefixed by >>)
>> drivers/iio/common/scmi_sensors/scmi_iio.c:247:1-7: WARNING: do_div() does a 64-by-32 division, please consider using div64_u64 instead.
drivers/iio/common/scmi_sensors/scmi_iio.c:507:2-8: WARNING: do_div() does a 64-by-32 division, please consider using div64_u64 instead.
drivers/iio/common/scmi_sensors/scmi_iio.c:273:2-8: WARNING: do_div() does a 64-by-32 division, please consider using div64_u64 instead.
drivers/iio/common/scmi_sensors/scmi_iio.c:166:1-7: WARNING: do_div() does a 64-by-32 division, please consider using div64_u64 instead.
vim +247 drivers/iio/common/scmi_sensors/scmi_iio.c
f774117c96f94c Jyoti Bhayana 2021-03-09 238
f774117c96f94c Jyoti Bhayana 2021-03-09 239 static void convert_ns_to_freq(u64 interval_ns, u64 *hz, u64 *uhz)
f774117c96f94c Jyoti Bhayana 2021-03-09 240 {
f774117c96f94c Jyoti Bhayana 2021-03-09 241 u64 rem, freq;
f774117c96f94c Jyoti Bhayana 2021-03-09 242
f774117c96f94c Jyoti Bhayana 2021-03-09 243 freq = NSEC_PER_SEC;
f774117c96f94c Jyoti Bhayana 2021-03-09 244 rem = do_div(freq, interval_ns);
f774117c96f94c Jyoti Bhayana 2021-03-09 245 *hz = freq;
f774117c96f94c Jyoti Bhayana 2021-03-09 246 *uhz = rem * 1000000UL;
f774117c96f94c Jyoti Bhayana 2021-03-09 @247 do_div(*uhz, interval_ns);
f774117c96f94c Jyoti Bhayana 2021-03-09 248 }
f774117c96f94c Jyoti Bhayana 2021-03-09 249
:::::: The code at line 247 was first introduced by commit
:::::: f774117c96f94c7c4d2f076e4cacc80218b0df48 iio/scmi: Adding support for IIO SCMI Based Sensors
:::::: TO: Jyoti Bhayana <jbhayana@xxxxxxxxxx>
:::::: CC: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
--
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