* [thomas-weissschuh:b4/auxclock-nanosleep 18/44] kernel/time/benchmarks.c:38:3: warning: variable 'count' is uninitialized when used here
@ 2026-03-20 17:56 kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2026-03-20 17:56 UTC (permalink / raw)
To: Thomas Weißschuh (Schneider Electric); +Cc: llvm, oe-kbuild-all
tree: https://git.kernel.org/pub/scm/linux/kernel/git/thomas.weissschuh/linux.git b4/auxclock-nanosleep
head: 40e3ab4d08362c43874fd99e70d6ef6f57f086ef
commit: 7fe24e0ff2f96db84d1ce465aca76bd42c169ab7 [18/44] benchmarks
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260320/202603201851.3zVB9KXq-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260320/202603201851.3zVB9KXq-lkp@intel.com/reproduce)
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
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202603201851.3zVB9KXq-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> kernel/time/benchmarks.c:38:3: warning: variable 'count' is uninitialized when used here [-Wuninitialized]
38 | count++;
| ^~~~~
kernel/time/benchmarks.c:33:11: note: initialize the variable 'count' to silence this warning
33 | u64 count;
| ^
| = 0
kernel/time/benchmarks.c:56:3: warning: variable 'count' is uninitialized when used here [-Wuninitialized]
56 | count++;
| ^~~~~
kernel/time/benchmarks.c:50:11: note: initialize the variable 'count' to silence this warning
50 | u64 count;
| ^
| = 0
2 warnings generated.
vim +/count +38 kernel/time/benchmarks.c
29
30 static int benchmark_ktime_get_read(void *data, u64 *value)
31 {
32 ktime_t end;
33 u64 count;
34
35 end = ktime_get() + BENCHMARK_TIME;
36
37 do {
> 38 count++;
39 } while (ktime_get() < end);
40
41 *value = count;
42 return 0;
43 }
44
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 2+ messages in thread* [thomas-weissschuh:b4/auxclock-nanosleep 18/44] kernel/time/benchmarks.c:38:3: warning: variable 'count' is uninitialized when used here
@ 2026-03-20 19:54 kernel test robot
0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2026-03-20 19:54 UTC (permalink / raw)
To: Thomas Weißschuh (Schneider Electric); +Cc: llvm, oe-kbuild-all
tree: https://git.kernel.org/pub/scm/linux/kernel/git/thomas.weissschuh/linux.git b4/auxclock-nanosleep
head: 40e3ab4d08362c43874fd99e70d6ef6f57f086ef
commit: 7fe24e0ff2f96db84d1ce465aca76bd42c169ab7 [18/44] benchmarks
config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20260321/202603210311.uHxUmzdy-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260321/202603210311.uHxUmzdy-lkp@intel.com/reproduce)
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
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202603210311.uHxUmzdy-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> kernel/time/benchmarks.c:38:3: warning: variable 'count' is uninitialized when used here [-Wuninitialized]
38 | count++;
| ^~~~~
kernel/time/benchmarks.c:33:11: note: initialize the variable 'count' to silence this warning
33 | u64 count;
| ^
| = 0
kernel/time/benchmarks.c:56:3: warning: variable 'count' is uninitialized when used here [-Wuninitialized]
56 | count++;
| ^~~~~
kernel/time/benchmarks.c:50:11: note: initialize the variable 'count' to silence this warning
50 | u64 count;
| ^
| = 0
2 warnings generated.
vim +/count +38 kernel/time/benchmarks.c
29
30 static int benchmark_ktime_get_read(void *data, u64 *value)
31 {
32 ktime_t end;
33 u64 count;
34
35 end = ktime_get() + BENCHMARK_TIME;
36
37 do {
> 38 count++;
39 } while (ktime_get() < end);
40
41 *value = count;
42 return 0;
43 }
44
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 2+ messages in thread
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