[kkdwivedi:coroutine 14/19] kernel/bpf/helpers.c:2451:18: sparse: sparse: symbol 'bpf_coro_suspend' was not declared. Should it be static?

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/kkdwivedi/linux coroutine
head:   010227bd8fe1e7e1bcd7ac230700d24c9be9b714
commit: d53fe5798cf63f95f210cd13d1371a9578ab35bc [14/19] bpf: Add no-op bpf_coro_suspend() kfunc
config: x86_64-randconfig-r2309-20261029 (https://download.01.org/0day-ci/archive/20261029/202610291254.CEY38DsM-lkp@intel.com/config)
compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1)
sparse: v0.6.5-rc1-1-gc4640450
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261029/202610291254.CEY38DsM-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/202610291254.CEY38DsM-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   kernel/bpf/helpers.c:1269:21: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected unsigned long long ( *[usertype] callback_fn )( ... ) @@     got void [noderef] __rcu * @@
   kernel/bpf/helpers.c:1269:21: sparse:     expected unsigned long long ( *[usertype] callback_fn )( ... )
   kernel/bpf/helpers.c:1269:21: sparse:     got void [noderef] __rcu *
   kernel/bpf/helpers.c:2095:29: sparse: sparse: symbol 'bpf_get_current_task_proto' was not declared. Should it be static?
   kernel/bpf/helpers.c:2096:29: sparse: sparse: symbol 'bpf_get_current_task_btf_proto' was not declared. Should it be static?
   kernel/bpf/helpers.c:2097:29: sparse: sparse: symbol 'bpf_probe_read_user_proto' was not declared. Should it be static?
   kernel/bpf/helpers.c:2098:29: sparse: sparse: symbol 'bpf_probe_read_user_str_proto' was not declared. Should it be static?
   kernel/bpf/helpers.c:2099:29: sparse: sparse: symbol 'bpf_probe_read_kernel_proto' was not declared. Should it be static?
   kernel/bpf/helpers.c:2100:29: sparse: sparse: symbol 'bpf_probe_read_kernel_str_proto' was not declared. Should it be static?
   kernel/bpf/helpers.c:2101:29: sparse: sparse: symbol 'bpf_task_pt_regs_proto' was not declared. Should it be static?
   kernel/bpf/helpers.c:2102:29: sparse: sparse: symbol 'bpf_perf_event_read_proto' was not declared. Should it be static?
   kernel/bpf/helpers.c:2103:29: sparse: sparse: symbol 'bpf_send_signal_proto' was not declared. Should it be static?
   kernel/bpf/helpers.c:2104:29: sparse: sparse: symbol 'bpf_send_signal_thread_proto' was not declared. Should it be static?
   kernel/bpf/helpers.c:2107:29: sparse: sparse: symbol 'bpf_get_branch_snapshot_proto' was not declared. Should it be static?
   kernel/bpf/helpers.c:2393:18: sparse: sparse: symbol 'bpf_obj_new' was not declared. Should it be static?
   kernel/bpf/helpers.c:2407:18: sparse: sparse: symbol 'bpf_obj_new_impl' was not declared. Should it be static?
   kernel/bpf/helpers.c:2423:18: sparse: sparse: symbol 'bpf_percpu_obj_new' was not declared. Should it be static?
   kernel/bpf/helpers.c:2431:18: sparse: sparse: symbol 'bpf_percpu_obj_new_impl' was not declared. Should it be static?
   kernel/bpf/helpers.c:2446:18: sparse: sparse: symbol 'bpf_coro_frame_free' was not declared. Should it be static?
>> kernel/bpf/helpers.c:2451:18: sparse: sparse: symbol 'bpf_coro_suspend' was not declared. Should it be static?
   kernel/bpf/helpers.c:2486:18: sparse: sparse: symbol 'bpf_obj_drop' was not declared. Should it be static?
   kernel/bpf/helpers.c:2505:18: sparse: sparse: symbol 'bpf_percpu_obj_drop' was not declared. Should it be static?
   kernel/bpf/helpers.c:2526:18: sparse: sparse: symbol 'bpf_refcount_acquire' was not declared. Should it be static?
   kernel/bpf/helpers.c:2543:18: sparse: sparse: symbol 'bpf_refcount_acquire_impl' was not declared. Should it be static?
   kernel/bpf/helpers.c:2601:17: sparse: sparse: symbol 'bpf_list_push_front' was not declared. Should it be static?
   kernel/bpf/helpers.c:2612:17: sparse: sparse: symbol 'bpf_list_push_front_impl' was not declared. Should it be static?
   kernel/bpf/helpers.c:2631:17: sparse: sparse: symbol 'bpf_list_push_back' was not declared. Should it be static?
   kernel/bpf/helpers.c:2642:17: sparse: sparse: symbol 'bpf_list_push_back_impl' was not declared. Should it be static?
   kernel/bpf/helpers.c:2649:17: sparse: sparse: symbol 'bpf_list_add' was not declared. Should it be static?
   kernel/bpf/helpers.c:2685:34: sparse: sparse: symbol 'bpf_list_pop_front' was not declared. Should it be static?
   kernel/bpf/helpers.c:2692:34: sparse: sparse: symbol 'bpf_list_pop_back' was not declared. Should it be static?
   kernel/bpf/helpers.c:2699:34: sparse: sparse: symbol 'bpf_list_del' was not declared. Should it be static?
   kernel/bpf/helpers.c:2708:34: sparse: sparse: symbol 'bpf_list_front' was not declared. Should it be static?
   kernel/bpf/helpers.c:2718:34: sparse: sparse: symbol 'bpf_list_back' was not declared. Should it be static?
   kernel/bpf/helpers.c:2728:18: sparse: sparse: symbol 'bpf_list_is_first' was not declared. Should it be static?
   kernel/bpf/helpers.c:2740:18: sparse: sparse: symbol 'bpf_list_is_last' was not declared. Should it be static?
   kernel/bpf/helpers.c:2752:18: sparse: sparse: symbol 'bpf_list_empty' was not declared. Should it be static?
   kernel/bpf/helpers.c:2765:32: sparse: sparse: symbol 'bpf_rbtree_remove' was not declared. Should it be static?
   kernel/bpf/helpers.c:2850:26: sparse: sparse: symbol 'bpf_rbtree_add' was not declared. Should it be static?
   kernel/bpf/helpers.c:2862:26: sparse: sparse: symbol 'bpf_rbtree_add_impl' was not declared. Should it be static?
   kernel/bpf/helpers.c:2873:32: sparse: sparse: symbol 'bpf_rbtree_first' was not declared. Should it be static?
   kernel/bpf/helpers.c:2880:32: sparse: sparse: symbol 'bpf_rbtree_root' was not declared. Should it be static?
   kernel/bpf/helpers.c:2887:32: sparse: sparse: symbol 'bpf_rbtree_left' was not declared. Should it be static?
   kernel/bpf/helpers.c:2897:32: sparse: sparse: symbol 'bpf_rbtree_right' was not declared. Should it be static?
   kernel/bpf/helpers.c:2913:32: sparse: sparse: symbol 'bpf_task_acquire' was not declared. Should it be static?
   kernel/bpf/helpers.c:2924:18: sparse: sparse: symbol 'bpf_task_release' was not declared. Should it be static?
   kernel/bpf/helpers.c:2929:18: sparse: sparse: symbol 'bpf_task_release_dtor' was not declared. Should it be static?
   kernel/bpf/helpers.c:2942:27: sparse: sparse: symbol 'bpf_cgroup_acquire' was not declared. Should it be static?
   kernel/bpf/helpers.c:2954:18: sparse: sparse: symbol 'bpf_cgroup_release' was not declared. Should it be static?
   kernel/bpf/helpers.c:2959:18: sparse: sparse: symbol 'bpf_cgroup_release_dtor' was not declared. Should it be static?
   kernel/bpf/helpers.c:2972:27: sparse: sparse: symbol 'bpf_cgroup_ancestor' was not declared. Should it be static?
   kernel/bpf/helpers.c:2992:27: sparse: sparse: symbol 'bpf_cgroup_from_id' was not declared. Should it be static?
   kernel/bpf/helpers.c:3012:18: sparse: sparse: symbol 'bpf_task_under_cgroup' was not declared. Should it be static?
   kernel/bpf/helpers.c:3055:27: sparse: sparse: symbol 'bpf_task_get_cgroup1' was not declared. Should it be static?
   kernel/bpf/helpers.c:3072:32: sparse: sparse: symbol 'bpf_task_from_pid' was not declared. Should it be static?
   kernel/bpf/helpers.c:3091:32: sparse: sparse: symbol 'bpf_task_from_vpid' was not declared. Should it be static?
   kernel/bpf/helpers.c:3134:18: sparse: sparse: symbol 'bpf_dynptr_slice' was not declared. Should it be static?
   kernel/bpf/helpers.c:3257:17: sparse: sparse: symbol 'bpf_dynptr_adjust' was not declared. Should it be static?
   kernel/bpf/helpers.c:3276:18: sparse: sparse: symbol 'bpf_dynptr_is_null' was not declared. Should it be static?
   kernel/bpf/helpers.c:3283:18: sparse: sparse: symbol 'bpf_dynptr_is_rdonly' was not declared. Should it be static?
   kernel/bpf/helpers.c:3293:17: sparse: sparse: symbol 'bpf_dynptr_size' was not declared. Should it be static?
   kernel/bpf/helpers.c:3303:17: sparse: sparse: symbol 'bpf_dynptr_clone' was not declared. Should it be static?
   kernel/bpf/helpers.c:3330:17: sparse: sparse: symbol 'bpf_dynptr_copy' was not declared. Should it be static?
   kernel/bpf/helpers.c:3385:17: sparse: sparse: symbol 'bpf_dynptr_memset' was not declared. Should it be static?
   kernel/bpf/helpers.c:3420:18: sparse: sparse: symbol 'bpf_cast_to_kern_ctx' was not declared. Should it be static?
   kernel/bpf/helpers.c:3425:18: sparse: sparse: symbol 'bpf_rdonly_cast' was not declared. Should it be static?
   kernel/bpf/helpers.c:3430:18: sparse: sparse: symbol 'bpf_rcu_read_lock' was not declared. Should it be static?
   kernel/bpf/helpers.c:3440:18: sparse: sparse: symbol 'bpf_throw' was not declared. Should it be static?
   kernel/bpf/helpers.c:3445:17: sparse: sparse: symbol 'bpf_wq_init' was not declared. Should it be static?
   kernel/bpf/helpers.c:3459:17: sparse: sparse: symbol 'bpf_wq_start' was not declared. Should it be static?
   kernel/bpf/helpers.c:3483:17: sparse: sparse: symbol 'bpf_wq_set_callback' was not declared. Should it be static?
   kernel/bpf/helpers.c:3496:18: sparse: sparse: symbol 'bpf_preempt_disable' was not declared. Should it be static?
   kernel/bpf/helpers.c:3560:1: sparse: sparse: symbol 'bpf_iter_bits_new' was not declared. Should it be static?
   kernel/bpf/helpers.c:3621:17: sparse: sparse: symbol 'bpf_iter_bits_next' was not declared. Should it be static?
   kernel/bpf/helpers.c:3647:18: sparse: sparse: symbol 'bpf_iter_bits_destroy' was not declared. Should it be static?
   kernel/bpf/helpers.c:3677:17: sparse: sparse: symbol 'bpf_copy_from_user_str' was not declared. Should it be static?
   kernel/bpf/helpers.c:3718:17: sparse: sparse: symbol 'bpf_copy_from_user_mm' was not declared. Should it be static?
   kernel/bpf/helpers.c:3762:17: sparse: sparse: symbol 'bpf_copy_from_user_mm_str' was not declared. Should it be static?
   kernel/bpf/helpers.c:3808:17: sparse: sparse: symbol 'bpf_copy_from_user_task_str' was not declared. Should it be static?
   kernel/bpf/helpers.c:3842:18: sparse: sparse: symbol 'bpf_local_irq_save' was not declared. Should it be static?
   kernel/bpf/helpers.c:3852:18: sparse: sparse: symbol '__bpf_trap' was not declared. Should it be static?
   kernel/bpf/helpers.c:3907:17: sparse: sparse: symbol 'bpf_strcmp' was not declared. Should it be static?
   kernel/bpf/helpers.c:3925:17: sparse: sparse: symbol 'bpf_strcasecmp' was not declared. Should it be static?
   kernel/bpf/helpers.c:3944:17: sparse: sparse: symbol 'bpf_strncasecmp' was not declared. Should it be static?
   kernel/bpf/helpers.c:3965:17: sparse: sparse: symbol 'bpf_strnchr' was not declared. Should it be static?
   kernel/bpf/helpers.c:4002:17: sparse: sparse: symbol 'bpf_strchr' was not declared. Should it be static?
   kernel/bpf/helpers.c:4019:17: sparse: sparse: symbol 'bpf_strchrnul' was not declared. Should it be static?
   kernel/bpf/helpers.c:4051:17: sparse: sparse: symbol 'bpf_strrchr' was not declared. Should it be static?
   kernel/bpf/helpers.c:4084:17: sparse: sparse: symbol 'bpf_strnlen' was not declared. Should it be static?
   kernel/bpf/helpers.c:4114:17: sparse: sparse: symbol 'bpf_strlen' was not declared. Should it be static?
   kernel/bpf/helpers.c:4132:17: sparse: sparse: symbol 'bpf_strspn' was not declared. Should it be static?
   kernel/bpf/helpers.c:4176:17: sparse: sparse: symbol 'bpf_strcspn' was not declared. Should it be static?
   kernel/bpf/helpers.c:4267:17: sparse: sparse: symbol 'bpf_strstr' was not declared. Should it be static?
   kernel/bpf/helpers.c:4286:17: sparse: sparse: symbol 'bpf_strcasestr' was not declared. Should it be static?
   kernel/bpf/helpers.c:4305:17: sparse: sparse: symbol 'bpf_strnstr' was not declared. Should it be static?
   kernel/bpf/helpers.c:4326:17: sparse: sparse: symbol 'bpf_strncasestr' was not declared. Should it be static?
   kernel/bpf/helpers.c:4820:17: sparse: sparse: symbol 'bpf_task_work_schedule_signal' was not declared. Should it be static?
   kernel/bpf/helpers.c:4838:17: sparse: sparse: symbol 'bpf_task_work_schedule_resume' was not declared. Should it be static?
   kernel/bpf/helpers.c:4921:17: sparse: sparse: symbol 'bpf_call_rcu' was not declared. Should it be static?
   kernel/bpf/helpers.c:4939:17: sparse: sparse: symbol 'bpf_call_rcu_tasks_trace' was not declared. Should it be static?
   kernel/bpf/helpers.c:4969:17: sparse: sparse: symbol 'bpf_dynptr_from_file' was not declared. Should it be static?
   kernel/bpf/helpers.c:4979:17: sparse: sparse: symbol 'bpf_dynptr_file_discard' was not declared. Should it be static?
   kernel/bpf/helpers.c:5008:17: sparse: sparse: symbol 'bpf_timer_cancel_async' was not declared. Should it be static?
   kernel/bpf/helpers.c: note: in included file:
   include/linux/bpf_unwind.h:137:48: sparse: sparse: undefined identifier '__builtin_dwarf_cfa'
   include/linux/bpf_unwind.h:137:32: sparse: sparse: cast from unknown type
   include/linux/bpf_unwind.h:137:32: sparse: sparse: cast from unknown type

vim +/bpf_coro_suspend +2451 kernel/bpf/helpers.c

  2450	
> 2451	__bpf_kfunc void bpf_coro_suspend(void *p__ign)
  2452	{
  2453	}
  2454	

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