tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.19 head: 45baa007ba13bc516470dbd9379b2f7525a087e1 commit: 1727d28632e4f124f314bc19ad4f40ec183fe60e [52/59] FROMLIST: sched/fair: core wide vruntime comparison config: um-allnoconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce (this is a W=1 build): git checkout 1727d28632e4f124f314bc19ad4f40ec183fe60e # save the attached .config to linux build tree make W=1 ARCH=um If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>, old ones prefixed by <<): cc1: warning: arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] In file included from include/asm-generic/bug.h:5, from ./arch/um/include/generated/asm/bug.h:1, from include/linux/bug.h:5, from include/linux/thread_info.h:12, from include/asm-generic/current.h:5, from ./arch/um/include/generated/asm/current.h:1, from include/linux/sched.h:12, from kernel/sched/sched.h:5, from kernel/sched/fair.c:23: include/asm-generic/fixmap.h: In function 'fix_to_virt': include/asm-generic/fixmap.h:31:19: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] 31 | BUILD_BUG_ON(idx >= __end_of_fixed_addresses); | ^~ include/linux/compiler.h:328:9: note: in definition of macro '__compiletime_assert' 328 | if (!(condition)) | ^~~~~~~~~ include/linux/compiler.h:348:2: note: in expansion of macro '_compiletime_assert' 348 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:45:37: note: in expansion of macro 'compiletime_assert' 45 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) | ^~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:69:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' 69 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) | ^~~~~~~~~~~~~~~~ include/asm-generic/fixmap.h:31:2: note: in expansion of macro 'BUILD_BUG_ON' 31 | BUILD_BUG_ON(idx >= __end_of_fixed_addresses); | ^~~~~~~~~~~~ In file included from include/linux/memremap.h:7, from include/linux/mm.h:27, from include/linux/cpuset.h:17, from kernel/sched/sched.h:44, from kernel/sched/fair.c:23: include/linux/mm.h: In function 'pgtable_init': arch/um/include/asm/pgtable.h:35:33: warning: suggest braces around empty body in 'do' statement [-Wempty-body] 35 | #define pgtable_cache_init() do ; while (0) | ^ include/linux/mm.h:1932:2: note: in expansion of macro 'pgtable_cache_init' 1932 | pgtable_cache_init(); | ^~~~~~~~~~~~~~~~~~ kernel/sched/fair.c: In function 'cfs_prio_less': 539 | while (!is_same_group(sea, seb)) { | ^~~~~~~~~~~~~ 540 | int sea_depth = sea->depth; | ^~ kernel/sched/fair.c:541:23: error: 'struct sched_entity' has no member named 'depth' 541 | int seb_depth = seb->depth; | ^~ 554 | while (sea->parent) | ^~ kernel/sched/fair.c:555:12: error: 'struct sched_entity' has no member named 'parent' 555 | sea = sea->parent; | ^~ kernel/sched/fair.c:556:12: error: 'struct sched_entity' has no member named 'parent' 556 | while (seb->parent) | ^~ kernel/sched/fair.c:557:12: error: 'struct sched_entity' has no member named 'parent' 557 | seb = seb->parent; | ^~ kernel/sched/fair.c: At top level: kernel/sched/fair.c:5214:6: warning: no previous prototype for 'init_cfs_bandwidth' [-Wmissing-prototypes] 5214 | void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {} | ^~~~~~~~~~~~~~~~~~ kernel/sched/fair.c:11366:6: warning: no previous prototype for 'free_fair_sched_group' [-Wmissing-prototypes] 11366 | void free_fair_sched_group(struct task_group *tg) { } | ^~~~~~~~~~~~~~~~~~~~~ kernel/sched/fair.c:11368:5: warning: no previous prototype for 'alloc_fair_sched_group' [-Wmissing-prototypes] 11368 | int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent) | ^~~~~~~~~~~~~~~~~~~~~~ kernel/sched/fair.c:11373:6: warning: no previous prototype for 'online_fair_sched_group' [-Wmissing-prototypes] 11373 | void online_fair_sched_group(struct task_group *tg) { } | ^~~~~~~~~~~~~~~~~~~~~~~ kernel/sched/fair.c:11375:6: warning: no previous prototype for 'unregister_fair_sched_group' [-Wmissing-prototypes] 11375 | void unregister_fair_sched_group(struct task_group *tg) { } | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/sched/fair.c:7613:1: warning: 'pick_task_fair' defined but not used [-Wunused-function] 7613 | pick_task_fair(struct rq *rq) | ^~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/is_same_group +539 kernel/sched/fair.c 528 529 bool cfs_prio_less(struct task_struct *a, struct task_struct *b) 530 { 531 struct sched_entity *sea = &a->se; 532 struct sched_entity *seb = &b->se; 533 bool samecpu = task_cpu(a) == task_cpu(b); 534 struct task_struct *p; 535 s64 delta; 536 537 if (samecpu) { 538 /* vruntime is per cfs_rq */ 541 int seb_depth = seb->depth; 542 543 if (sea_depth >= seb_depth) 544 sea = parent_entity(sea); 545 if (sea_depth <= seb_depth) 546 seb = parent_entity(seb); 547 } 548 549 delta = (s64)(sea->vruntime - seb->vruntime); 550 goto out; 551 } 552 553 /* crosscpu: compare root level se's vruntime to decide priority */ 555 sea = sea->parent; 556 while (seb->parent) 557 seb = seb->parent; 558 delta = (s64)(sea->vruntime - seb->vruntime); 559 560 out: 561 p = delta > 0 ? b : a; 562 trace_printk("picked %s/%d %s: %Ld %Ld %Ld\n", p->comm, p->pid, 563 samecpu ? "samecpu" : "crosscpu", 564 sea->vruntime, seb->vruntime, delta); 565 566 return delta > 0; 567 } 568 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org