* [peterz-queue:sched/task_h_load 25/27] kernel/sched/fair.c:2080:2: error: call to undeclared function 'cfs_of_of'; ISO C99 and later do not support implicit function declarations
@ 2026-09-03 0:28 kernel test robot
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From: kernel test robot @ 2026-09-03 0:28 UTC (permalink / raw)
To: Peter Zijlstra; +Cc: llvm, oe-kbuild-all
tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/task_h_load
head: 4cbbcdc1a5585407e918e633887e57d978ddf0c6
commit: 65fc965b77f4f7f70aff38ad18e2a4e09880dad4 [25/27] sched/fair: Fold cfs_rq_of(se) into for_each_sched_entity()
config: hexagon-allnoconfig (https://download.01.org/0day-ci/archive/20260903/202609030843.mfhuyAcC-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 2c2cffa015e9549aafba9e514384b08204c7cc4b)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260903/202609030843.mfhuyAcC-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/202609030843.mfhuyAcC-lkp@intel.com/
All errors (new ones prefixed by >>):
>> kernel/sched/fair.c:2080:2: error: call to undeclared function 'cfs_of_of'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
2080 | for_each_sched_entity(se, cfs_rq)
| ^
kernel/sched/fair.c:456:29: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^
kernel/sched/fair.c:2080:2: note: did you mean 'cfs_rq_of'?
kernel/sched/fair.c:456:29: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^
kernel/sched/sched.h:1765:30: note: 'cfs_rq_of' declared here
1765 | static inline struct cfs_rq *cfs_rq_of(const struct sched_entity *se)
| ^
>> kernel/sched/fair.c:2080:2: error: incompatible integer to pointer conversion assigning to 'struct cfs_rq *' from 'int' [-Wint-conversion]
2080 | for_each_sched_entity(se, cfs_rq)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/sched/fair.c:456:27: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^ ~~~~~~~~~~~~~
kernel/sched/fair.c:4815:2: error: call to undeclared function 'cfs_of_of'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
4815 | for_each_sched_entity(se, cfs_rq)
| ^
kernel/sched/fair.c:456:29: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^
kernel/sched/fair.c:4815:2: error: incompatible integer to pointer conversion assigning to 'struct cfs_rq *' from 'int' [-Wint-conversion]
4815 | for_each_sched_entity(se, cfs_rq)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/sched/fair.c:456:27: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^ ~~~~~~~~~~~~~
kernel/sched/fair.c:6399:2: error: call to undeclared function 'cfs_of_of'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
6399 | for_each_sched_entity(se, cfs_rq)
| ^
kernel/sched/fair.c:456:29: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^
kernel/sched/fair.c:6399:2: error: incompatible integer to pointer conversion assigning to 'struct cfs_rq *' from 'int' [-Wint-conversion]
6399 | for_each_sched_entity(se, cfs_rq)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/sched/fair.c:456:27: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^ ~~~~~~~~~~~~~
kernel/sched/fair.c:6418:2: error: call to undeclared function 'cfs_of_of'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
6418 | for_each_sched_entity(se, cfs_rq)
| ^
kernel/sched/fair.c:456:29: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^
kernel/sched/fair.c:6418:2: error: incompatible integer to pointer conversion assigning to 'struct cfs_rq *' from 'int' [-Wint-conversion]
6418 | for_each_sched_entity(se, cfs_rq)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/sched/fair.c:456:27: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^ ~~~~~~~~~~~~~
kernel/sched/fair.c:7941:2: error: call to undeclared function 'cfs_of_of'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
7941 | for_each_sched_entity(se, cfs_rq) {
| ^
kernel/sched/fair.c:456:29: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^
kernel/sched/fair.c:7941:2: error: incompatible integer to pointer conversion assigning to 'struct cfs_rq *' from 'int' [-Wint-conversion]
7941 | for_each_sched_entity(se, cfs_rq) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/sched/fair.c:456:27: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^ ~~~~~~~~~~~~~
kernel/sched/fair.c:8078:2: error: call to undeclared function 'cfs_of_of'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
8078 | for_each_sched_entity(se, cfs_rq) {
| ^
kernel/sched/fair.c:456:29: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^
kernel/sched/fair.c:8078:2: error: incompatible integer to pointer conversion assigning to 'struct cfs_rq *' from 'int' [-Wint-conversion]
8078 | for_each_sched_entity(se, cfs_rq) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/sched/fair.c:456:27: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^ ~~~~~~~~~~~~~
kernel/sched/fair.c:15056:3: error: call to undeclared function 'cfs_of_of'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
15056 | for_each_sched_entity(se, cfs_rq) {
| ^
kernel/sched/fair.c:456:29: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^
kernel/sched/fair.c:15056:3: error: incompatible integer to pointer conversion assigning to 'struct cfs_rq *' from 'int' [-Wint-conversion]
15056 | for_each_sched_entity(se, cfs_rq) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/sched/fair.c:456:27: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^ ~~~~~~~~~~~~~
kernel/sched/fair.c:15242:2: error: call to undeclared function 'cfs_of_of'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
15242 | for_each_sched_entity(se, cfs_rq) {
| ^
kernel/sched/fair.c:456:29: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^
kernel/sched/fair.c:15242:2: error: incompatible integer to pointer conversion assigning to 'struct cfs_rq *' from 'int' [-Wint-conversion]
15242 | for_each_sched_entity(se, cfs_rq) {
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/sched/fair.c:456:27: note: expanded from macro 'for_each_sched_entity'
456 | for (; (se) && ((cfs_rq) = cfs_of_of(se)); (se) = NULL)
| ^ ~~~~~~~~~~~~~
16 errors generated.
vim +/cfs_of_of +2080 kernel/sched/fair.c
2074
2075 static void update_curr_fair(struct rq *rq)
2076 {
2077 struct sched_entity *se = &rq->donor->se;
2078 struct cfs_rq *cfs_rq;
2079
> 2080 for_each_sched_entity(se, cfs_rq)
2081 update_curr(cfs_rq);
2082 }
2083
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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