net/sched/bpf_qdisc.c:205:18: sparse: sparse: symbol 'bpf_kfree_skb_dtor' 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:   502d801f0ab03e4f32f9a33d203154ce84887921
commit: c99d97b46631c4bea0c14b7581b7a59214601e63 bpf: net_sched: Use the correct destructor kfunc type
date:   5 months ago
config: riscv-randconfig-r111-20260623 (https://download.01.org/0day-ci/archive/20260623/202606231739.u9sdVZuA-lkp@xxxxxxxxx/config)
compiler: riscv64-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/20260623/202606231739.u9sdVZuA-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
| Fixes: c99d97b46631 ("bpf: net_sched: Use the correct destructor kfunc type")
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202606231739.u9sdVZuA-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
>> net/sched/bpf_qdisc.c:205:18: sparse: sparse: symbol 'bpf_kfree_skb_dtor' was not declared. Should it be static?
   net/sched/bpf_qdisc.c:234:17: sparse: sparse: symbol 'bpf_qdisc_init_prologue' was not declared. Should it be static?
   net/sched/bpf_qdisc.c:261:18: sparse: sparse: symbol 'bpf_qdisc_reset_destroy_epilogue' was not declared. Should it be static?

vim +/bpf_kfree_skb_dtor +205 net/sched/bpf_qdisc.c

   204	
 > 205	__bpf_kfunc void bpf_kfree_skb_dtor(void *skb)
   206	{
   207		bpf_kfree_skb(skb);
   208	}
   209	CFI_NOSEAL(bpf_kfree_skb_dtor);
   210	

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