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Should it be static? Message-ID: <202604051832.E2GE9BJq-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 3aae9383f42f687221c011d7ee87529398e826b3 commit: a3f5d48222532484c1e85ef27cc6893803e4cd17 sched_ext: Allow scx_bpf_reenqueue_local() to be called from anywhere date: 5 months ago config: sparc-randconfig-r134-20260404 (https://download.01.org/0day-ci/archive/20260405/202604051832.E2GE9BJq-lkp@intel.com/config) compiler: sparc-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/20260405/202604051832.E2GE9BJq-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 | Fixes: a3f5d4822253 ("sched_ext: Allow scx_bpf_reenqueue_local() to be called from anywhere") | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202604051832.E2GE9BJq-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) 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:3078:33: 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:3078:33: sparse: expected struct scx_sched *sch kernel/sched/ext.c:3078:33: sparse: got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root kernel/sched/ext.c:3107:33: 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:3107:33: sparse: expected struct scx_sched *sch kernel/sched/ext.c:3107:33: sparse: got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root kernel/sched/ext.c:3120:33: 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:3120:33: sparse: expected struct scx_sched *sch kernel/sched/ext.c:3120:33: sparse: got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root kernel/sched/ext.c:3169:33: 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:3169:33: sparse: expected struct scx_sched *sch kernel/sched/ext.c:3169:33: sparse: got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root kernel/sched/ext.c:3188:33: 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:3188:33: sparse: expected struct scx_sched *sch kernel/sched/ext.c:3188:33: sparse: got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root kernel/sched/ext.c:3206:33: 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:3206:33: sparse: expected struct scx_sched *sch kernel/sched/ext.c:3206:33: sparse: got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root kernel/sched/ext.c:3222:33: 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:3222:33: sparse: expected struct scx_sched *sch kernel/sched/ext.c:3222:33: sparse: got struct scx_sched [noderef] __rcu *static [addressable] [toplevel] scx_root kernel/sched/ext.c:3239:33: 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:3239:33: sparse: expected struct scx_sched *sch kernel/sched/ext.c:3239:33: 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/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 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki