lib/tests/string_kunit.c:866:9: sparse: sparse: not a function __func

:::::: 
:::::: Manual check reason: "low confidence static check warning: lib/tests/string_kunit.c:866:9: sparse: sparse: not a function __func"
:::::: 

BCC: [email protected]
CC: [email protected]
CC: [email protected]
TO: Feng Jiang <[email protected]>
CC: Paul Walmsley <[email protected]>
CC: Kees Cook <[email protected]>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3a0dd7ba4f44cdc116d83712f61e7c1a95be3588
commit: 0020240a431187628e2636284023e63b9b7a2aa1 lib/string_kunit: add performance benchmark for strlen()
date:   5 months ago
:::::: branch date: 6 hours ago
:::::: commit date: 5 months ago
config: s390-randconfig-r132-20260818 (https://download.01.org/0day-ci/archive/20260819/[email protected]/config)
compiler: s390-linux-gcc (GCC) 15.2.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260819/[email protected]/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
| Fixes: 0020240a4311 ("lib/string_kunit: add performance benchmark for strlen()")
| Reported-by: kernel test robot <[email protected]>
| Closes: https://lore.kernel.org/r/[email protected]/

sparse warnings: (new ones prefixed by >>)
   lib/tests/string_kunit.c:866:9: sparse: sparse: undefined identifier 'strlen'
   lib/tests/string_kunit.c:866:9: sparse: sparse: undefined identifier 'strlen'
>> lib/tests/string_kunit.c:866:9: sparse: sparse: not a function __func
>> lib/tests/string_kunit.c:866:9: sparse: sparse: not a function __func

vim +866 lib/tests/string_kunit.c

0020240a431187 Feng Jiang 2026-04-03  863  
0020240a431187 Feng Jiang 2026-04-03  864  static void string_bench_strlen(struct kunit *test)
0020240a431187 Feng Jiang 2026-04-03  865  {
0020240a431187 Feng Jiang 2026-04-03 @866  	STRING_BENCH_BUF(test, buf, len, strlen, buf);
0020240a431187 Feng Jiang 2026-04-03  867  }
0020240a431187 Feng Jiang 2026-04-03  868  

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