linux-kernel - net/sched/bpf_qdisc.c:224:18: sparse: sparse: symbol 'bpf_qdisc_init_prologue' was not declared. Should it be static?

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Message-ID: <202601191053.nOFAvLPG-lkp@intel.com>
Date: Mon, 19 Jan 2026 10:51:05 +0800
From: kernel test robot <lkp@...el.com>
To: Amery Hung <amery.hung@...edance.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
 Martin KaFai Lau <martin.lau@...nel.org>
Subject: net/sched/bpf_qdisc.c:224:18: sparse: sparse: symbol
 'bpf_qdisc_init_prologue' was not declared. Should it be static?

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   e84d960149e71e8d5e4db69775ce31305898ed0c
commit: 7a2dafda950b78611dc441c83d105dfdc7082681 bpf: net_sched: Add a qdisc watchdog timer
date:   9 months ago
config: s390-randconfig-r133-20260115 (https://download.01.org/0day-ci/archive/20260119/202601191053.nOFAvLPG-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9b8addffa70cee5b2acc5454712d9cf78ce45710)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260119/202601191053.nOFAvLPG-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601191053.nOFAvLPG-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> net/sched/bpf_qdisc.c:224:18: sparse: sparse: symbol 'bpf_qdisc_init_prologue' was not declared. Should it be static?
>> net/sched/bpf_qdisc.c:234:18: sparse: sparse: symbol 'bpf_qdisc_reset_destroy_epilogue' was not declared. Should it be static?

vim +/bpf_qdisc_init_prologue +224 net/sched/bpf_qdisc.c

   222	
   223	/* bpf_qdisc_init_prologue - Hidden kfunc called in prologue of .init. */
 > 224	__bpf_kfunc void bpf_qdisc_init_prologue(struct Qdisc *sch)
   225	{
   226		struct bpf_sched_data *q = qdisc_priv(sch);
   227	
   228		qdisc_watchdog_init(&q->watchdog, sch);
   229	}
   230	
   231	/* bpf_qdisc_reset_destroy_epilogue - Hidden kfunc called in epilogue of .reset
   232	 * and .destroy
   233	 */
 > 234	__bpf_kfunc void bpf_qdisc_reset_destroy_epilogue(struct Qdisc *sch)
   235	{
   236		struct bpf_sched_data *q = qdisc_priv(sch);
   237	
   238		qdisc_watchdog_cancel(&q->watchdog);
   239	}
   240	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki