kernel/sched/ext.c:6509:18: sparse: sparse: symbol 'scx_bpf_reenqueue_local___v2' was not declared. Should it be static?

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   af4e9ef3d78420feb8fe58cd9a1ab80c501b3c08
commit: a3f5d48222532484c1e85ef27cc6893803e4cd17 sched_ext: Allow scx_bpf_reenqueue_local() to be called from anywhere
date:   4 months ago
config: sparc-randconfig-r122-20260302 (https://download.01.org/0day-ci/archive/20260304/202603040332.o3BbPAat-lkp@xxxxxxxxx/config)
compiler: sparc64-linux-gcc (GCC) 8.5.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260304/202603040332.o3BbPAat-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202603040332.o3BbPAat-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
   kernel/sched/ext.c:1527:33: sparse:     expected struct scx_sched *sch
   kernel/sched/ext.c:1527:33: sparse:     got struct scx_sched [noderef] __rcu *static [toplevel] scx_root
   kernel/sched/ext.c:1528:38: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *from @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/ext.c:1528:38: sparse:     expected struct task_struct *from
   kernel/sched/ext.c:1528:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/ext.c:2082:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [toplevel] scx_root @@
   kernel/sched/ext.c:2082:33: sparse:     expected struct scx_sched *sch
   kernel/sched/ext.c:2082:33: sparse:     got struct scx_sched [noderef] __rcu *static [toplevel] scx_root
   kernel/sched/ext.c:2225:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [toplevel] scx_root @@
   kernel/sched/ext.c:2225:33: sparse:     expected struct scx_sched *sch
   kernel/sched/ext.c:2225:33: sparse:     got struct scx_sched [noderef] __rcu *static [toplevel] scx_root
   kernel/sched/ext.c:2281:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [toplevel] scx_root @@
   kernel/sched/ext.c:2281:33: sparse:     expected struct scx_sched *sch
   kernel/sched/ext.c:2281:33: sparse:     got struct scx_sched [noderef] __rcu *static [toplevel] scx_root
   kernel/sched/ext.c:2322:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [toplevel] scx_root @@
   kernel/sched/ext.c:2322:33: sparse:     expected struct scx_sched *sch
   kernel/sched/ext.c:2322:33: sparse:     got struct scx_sched [noderef] __rcu *static [toplevel] scx_root
   kernel/sched/ext.c:2376:38: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *prev @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/ext.c:2376:38: sparse:     expected struct task_struct *prev
   kernel/sched/ext.c:2376:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/ext.c:2469:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root @@
   kernel/sched/ext.c:2469:33: sparse:     expected struct scx_sched *sch
   kernel/sched/ext.c:2469:33: sparse:     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root
   kernel/sched/ext.c:2489:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root @@
   kernel/sched/ext.c:2489:33: sparse:     expected struct scx_sched *sch
   kernel/sched/ext.c:2489:33: sparse:     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root
   kernel/sched/ext.c:2550:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root @@
   kernel/sched/ext.c:2550:33: sparse:     expected struct scx_sched *sch
   kernel/sched/ext.c:2550:33: sparse:     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root
   kernel/sched/ext.c:2569:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root @@
   kernel/sched/ext.c:2569:33: sparse:     expected struct scx_sched *sch
   kernel/sched/ext.c:2569:33: sparse:     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root
   kernel/sched/ext.c:2691:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root @@
   kernel/sched/ext.c:2691:33: sparse:     expected struct scx_sched *sch
   kernel/sched/ext.c:2691:33: sparse:     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root
   kernel/sched/ext.c:2770:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root @@
   kernel/sched/ext.c:2770:33: sparse:     expected struct scx_sched *sch
   kernel/sched/ext.c:2770:33: sparse:     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root
   kernel/sched/ext.c:2823:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root @@
   kernel/sched/ext.c:2823:33: sparse:     expected struct scx_sched *sch
   kernel/sched/ext.c:2823:33: sparse:     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root
   kernel/sched/ext.c:2851:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root @@
   kernel/sched/ext.c:2851:33: sparse:     expected struct scx_sched *sch
   kernel/sched/ext.c:2851:33: sparse:     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root
   kernel/sched/ext.c:2864:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root @@
   kernel/sched/ext.c:2864:33: sparse:     expected struct scx_sched *sch
   kernel/sched/ext.c:2864:33: sparse:     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root
   kernel/sched/ext.c:2994:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root @@
   kernel/sched/ext.c:2994:33: sparse:     expected struct scx_sched *sch
   kernel/sched/ext.c:2994:33: sparse:     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root
   kernel/sched/ext.c:3010:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root @@
   kernel/sched/ext.c:3010:33: sparse:     expected struct scx_sched *sch
   kernel/sched/ext.c:3010:33: sparse:     got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root
   kernel/sched/ext.c:3919:50: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_kick_syncs **ksyncs @@     got struct scx_kick_syncs [noderef] __rcu ** @@
   kernel/sched/ext.c:3919:50: sparse:     expected struct scx_kick_syncs **ksyncs
   kernel/sched/ext.c:3919:50: sparse:     got struct scx_kick_syncs [noderef] __rcu **
   kernel/sched/ext.c:3922:27: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/ext.c:3922:27: sparse:    struct scx_kick_syncs [noderef] __rcu *
   kernel/sched/ext.c:3922:27: sparse:    struct scx_kick_syncs *
   kernel/sched/ext.c:3922:27: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/ext.c:3922:27: sparse:    struct scx_kick_syncs [noderef] __rcu *
   kernel/sched/ext.c:3922:27: sparse:    struct scx_kick_syncs *
   kernel/sched/ext.c:4203:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [addressable] [assigned] [toplevel] scx_root @@
   kernel/sched/ext.c:4246:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [addressable] [assigned] [toplevel] scx_root @@
   kernel/sched/ext.c:4357:52: sparse: sparse: incorrect type in argument 3 (different address spaces) @@     expected struct task_struct *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/ext.c:4434:50: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_kick_syncs **ksyncs @@     got struct scx_kick_syncs [noderef] __rcu ** @@
   kernel/sched/ext.c:4437:17: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/ext.c:4437:17: sparse:    struct scx_kick_syncs [noderef] __rcu *
   kernel/sched/ext.c:4437:17: sparse:    struct scx_kick_syncs *
   kernel/sched/ext.c:4446:17: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/ext.c:4446:17: sparse:    struct scx_kick_syncs [noderef] __rcu *
   kernel/sched/ext.c:4446:17: sparse:    struct scx_kick_syncs *
   kernel/sched/ext.c:5141:32: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct const *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/ext.c:5268:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [addressable] [assigned] [toplevel] scx_root @@
   kernel/sched/ext.c:5595:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [addressable] [assigned] [toplevel] scx_root @@
>> kernel/sched/ext.c:6509:18: sparse: sparse: symbol 'scx_bpf_reenqueue_local___v2' was not declared. Should it be static?
   kernel/sched/ext.c:6683:33: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/ext.c:6683:33: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/ext.c:6683:33: sparse:    struct task_struct const *
   kernel/sched/build_policy.c: note: in included file:
   kernel/sched/ext_idle.c:736:33: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct scx_sched *sch @@     got struct scx_sched [noderef] __rcu *static [addressable] [assigned] [toplevel] scx_root @@
   kernel/sched/ext_idle.c:756:49: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct const *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/build_policy.c: note: in included file:
   kernel/sched/syscalls.c:185:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/syscalls.c:185:22: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/syscalls.c:185:22: sparse:    struct task_struct *
   kernel/sched/syscalls.c:230:48: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/syscalls.c:230:48: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/syscalls.c:230:48: sparse:    struct task_struct *
   kernel/sched/build_policy.c: note: in included file:
   kernel/sched/sched.h:2282:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2282:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2282:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2282:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2282:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2282:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2293:26: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2293:26: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2293:26: sparse:    struct task_struct *
   kernel/sched/sched.h:2282:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2282:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2282:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2293:26: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2293:26: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2293:26: sparse:    struct task_struct *
   kernel/sched/sched.h:2282:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2282:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2282:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2282:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2282:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2282:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2293:26: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2293:26: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2293:26: sparse:    struct task_struct *
   kernel/sched/sched.h:2282:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2282:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2282:25: sparse:    struct task_struct *
   kernel/sched/sched.h:2282:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2282:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2282:25: sparse:    struct task_struct *
   kernel/sched/build_policy.c: note: in included file:
   kernel/sched/syscalls.c:1257:6: sparse: sparse: context imbalance in 'sched_getaffinity' - wrong count at exit
   kernel/sched/build_policy.c: note: in included file:
   kernel/sched/rt.c:1659:15: sparse: sparse: dereference of noderef expression

vim +/scx_bpf_reenqueue_local___v2 +6509 kernel/sched/ext.c

  6501	
  6502	/**
  6503	 * scx_bpf_reenqueue_local - Re-enqueue tasks on a local DSQ
  6504	 *
  6505	 * Iterate over all of the tasks currently enqueued on the local DSQ of the
  6506	 * caller's CPU, and re-enqueue them in the BPF scheduler. Can be called from
  6507	 * anywhere.
  6508	 */
> 6509	__bpf_kfunc void scx_bpf_reenqueue_local___v2(void)
  6510	{
  6511		struct rq *rq;
  6512	
  6513		guard(preempt)();
  6514	
  6515		rq = this_rq();
  6516		local_set(&rq->scx.reenq_local_deferred, 1);
  6517		schedule_deferred(rq);
  6518	}
  6519	

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