tree: https://github.com/congwang/linux.git sch_bpf head: aa61f170d88b706060a1977b7b7bef9d08e33ff1 commit: aa61f170d88b706060a1977b7b7bef9d08e33ff1 [2/2] sch_bpf: draft config: arm-randconfig-r015-20210812 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 10.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/congwang/linux/commit/aa61f170d88b706060a1977b7b7bef9d... git remote add congwang https://github.com/congwang/linux.git git fetch --no-tags congwang sch_bpf git checkout aa61f170d88b706060a1977b7b7bef9d08e33ff1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): In file included from include/linux/rbtree.h:22, from include/linux/mm_types.h:10, from include/linux/buildid.h:5, from include/linux/module.h:14, from net/sched/sch_bpf.c:7: net/sched/sch_bpf.c: In function 'sch_bpf_enqueue': 389 | typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \ | ^ include/linux/rcupdate.h:528:2: note: in expansion of macro '__rcu_dereference_check' 528 | __rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu) | ^~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:596:28: note: in expansion of macro 'rcu_dereference_check' 596 | #define rcu_dereference(p) rcu_dereference_check(p, 0) | ^~~~~~~~~~~~~~~~~~~~~ net/sched/sch_bpf.c:174:13: note: in expansion of macro 'rcu_dereference' 174 | enqueue = rcu_dereference(q->enqueue_prog); | ^~~~~~~~~~~~~~~ include/linux/rcupdate.h:389:35: error: invalid type argument of unary '*' (have 'struct sch_bpf_prog') 389 | typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \ | ^ include/linux/rcupdate.h:528:2: note: in expansion of macro '__rcu_dereference_check' 528 | __rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu) | ^~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:596:28: note: in expansion of macro 'rcu_dereference_check' 596 | #define rcu_dereference(p) rcu_dereference_check(p, 0) | ^~~~~~~~~~~~~~~~~~~~~ net/sched/sch_bpf.c:174:13: note: in expansion of macro 'rcu_dereference' 174 | enqueue = rcu_dereference(q->enqueue_prog); | ^~~~~~~~~~~~~~~ include/linux/rcupdate.h:392:11: error: invalid type argument of unary '*' (have 'struct sch_bpf_prog') 392 | ((typeof(*p) __force __kernel *)(________p1)); \ | ^ include/linux/rcupdate.h:528:2: note: in expansion of macro '__rcu_dereference_check' 528 | __rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu) | ^~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:596:28: note: in expansion of macro 'rcu_dereference_check' 596 | #define rcu_dereference(p) rcu_dereference_check(p, 0) | ^~~~~~~~~~~~~~~~~~~~~ net/sched/sch_bpf.c:174:13: note: in expansion of macro 'rcu_dereference' 174 | enqueue = rcu_dereference(q->enqueue_prog); | ^~~~~~~~~~~~~~~ net/sched/sch_bpf.c: In function 'sch_bpf_dequeue': 389 | typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \ | ^ include/linux/rcupdate.h:528:2: note: in expansion of macro '__rcu_dereference_check' 528 | __rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu) | ^~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:596:28: note: in expansion of macro 'rcu_dereference_check' 596 | #define rcu_dereference(p) rcu_dereference_check(p, 0) | ^~~~~~~~~~~~~~~~~~~~~ net/sched/sch_bpf.c:219:12: note: in expansion of macro 'rcu_dereference' 219 | dequeue = rcu_dereference(q->dequeue_prog); | ^~~~~~~~~~~~~~~ include/linux/rcupdate.h:389:35: error: invalid type argument of unary '*' (have 'struct sch_bpf_prog') 389 | typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \ | ^ include/linux/rcupdate.h:528:2: note: in expansion of macro '__rcu_dereference_check' 528 | __rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu) | ^~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:596:28: note: in expansion of macro 'rcu_dereference_check' 596 | #define rcu_dereference(p) rcu_dereference_check(p, 0) | ^~~~~~~~~~~~~~~~~~~~~ net/sched/sch_bpf.c:219:12: note: in expansion of macro 'rcu_dereference' 219 | dequeue = rcu_dereference(q->dequeue_prog); | ^~~~~~~~~~~~~~~ include/linux/rcupdate.h:392:11: error: invalid type argument of unary '*' (have 'struct sch_bpf_prog') 392 | ((typeof(*p) __force __kernel *)(________p1)); \ | ^ include/linux/rcupdate.h:528:2: note: in expansion of macro '__rcu_dereference_check' 528 | __rcu_dereference_check((p), (c) || rcu_read_lock_held(), __rcu) | ^~~~~~~~~~~~~~~~~~~~~~~ include/linux/rcupdate.h:596:28: note: in expansion of macro 'rcu_dereference_check' 596 | #define rcu_dereference(p) rcu_dereference_check(p, 0) | ^~~~~~~~~~~~~~~~~~~~~ net/sched/sch_bpf.c:219:12: note: in expansion of macro 'rcu_dereference' 219 | dequeue = rcu_dereference(q->dequeue_prog); | ^~~~~~~~~~~~~~~ 220 | bpf_compute_data_pointers(skb); | ^~~ net/sched/sch_bpf.c:220:28: note: each undeclared identifier is reported only once for each function it appears in 231 | ctx.skb = pq_pop(&cl->pq); | ^ 237 | if (res == SCH_BPF_RET_OK) { | ^~~~~~~~~~~~~~ 239 | } else if (res == SCH_BPF_RET_REQUEUE) { | ^~~~~~~~~~~~~~~~~~~ net/sched/sch_bpf.c: In function 'sch_bpf_search': 284 | return (unsigned long)sch_bpf_find(handle, sch); | ^~~~~~ | | | u32 {aka unsigned int} net/sched/sch_bpf.c:115:57: note: expected 'struct Qdisc *' but argument is of type 'u32' {aka 'unsigned int'} 115 | static struct sch_bpf_class *sch_bpf_find(struct Qdisc *sch, u32 classid) | ~~~~~~~~~~~~~~^~~ 284 | return (unsigned long)sch_bpf_find(handle, sch); | ^~~ | | | struct Qdisc * net/sched/sch_bpf.c:115:66: note: expected 'u32' {aka 'unsigned int'} but argument is of type 'struct Qdisc *' 115 | static struct sch_bpf_class *sch_bpf_find(struct Qdisc *sch, u32 classid) | ~~~~^~~~~~~ net/sched/sch_bpf.c: At top level: 298 | [TCA_SCH_BPF_ENQUEUE_PROG_FD] = { .type = NLA_U32 }, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ | TCA_SCH_BPF_ENQUEUE_PROG_ID net/sched/sch_bpf.c:298:3: note: (near initialization for 'sch_bpf_policy') 301 | [TCA_SCH_BPF_DEQUEUE_PROG_FD] = { .type = NLA_U32 }, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ | TCA_SCH_BPF_DEQUEUE_PROG_ID net/sched/sch_bpf.c:301:3: error: array index in initializer not of integer type net/sched/sch_bpf.c:301:3: note: (near initialization for 'sch_bpf_policy') net/sched/sch_bpf.c: In function 'bpf_init_prog': 314 | fp = bpf_prog_get_type(bpf_fd, BPF_PROG_TYPE_SCHED_SCH); | ^~~~~~~~~~~~~~~~~~~~~~~ | BPF_PROG_TYPE_SCHED_ACT net/sched/sch_bpf.c: At top level: net/sched/sch_bpf.c:331:8: error: return type defaults to 'int' [-Werror=return-type] 331 | static bpf_cleanup_prog(struct sch_bpf_prog *prog) | ^~~~~~~~~~~~~~~~ net/sched/sch_bpf.c: In function 'sch_bpf_change': 354 | opt[TCA_SCH_BPF_ENQUEUE_PROG_NAME], &q->enqueue_prog); | ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | | | struct nlattr net/sched/sch_bpf.c:306:60: note: expected 'struct nlattr *' but argument is of type 'struct nlattr' 306 | static int bpf_init_prog(struct nlattr *fd, struct nlattr *name, struct sch_bpf_prog *prog) | ~~~~~~~~~~~~~~~^~~~ net/sched/sch_bpf.c:358:11: error: incompatible type for argument 2 of 'bpf_init_prog' 358 | opt[TCA_SCH_BPF_DEQUEUE_PROG_NAME], &q->dequeue_prog); | ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | | | struct nlattr net/sched/sch_bpf.c:306:60: note: expected 'struct nlattr *' but argument is of type 'struct nlattr' 306 | static int bpf_init_prog(struct nlattr *fd, struct nlattr *name, struct sch_bpf_prog *prog) | ~~~~~~~~~~~~~~~^~~~ net/sched/sch_bpf.c:343:6: warning: unused variable 'gen_flags' [-Wunused-variable] 343 | u32 gen_flags = 0; | ^~~~~~~~~ net/sched/sch_bpf.c: In function 'sch_bpf_init': 388 | err = sch_bpf_change(sch, opt, extack); | ^~~ net/sched/sch_bpf.c: In function 'sch_bpf_change_class': net/sched/sch_bpf.c:428:3: error: 'err' undeclared (first use in this function) 428 | err = -ENOBUFS; | ^~~ 431 | goto failure; | ^~~~ net/sched/sch_bpf.c:424:60: warning: unused variable 'parent' [-Wunused-variable] 424 | struct sch_bpf_class *cl = (struct sch_bpf_class *)*arg, *parent; | ^~~~~~ net/sched/sch_bpf.c: In function 'sch_bpf_delete': net/sched/sch_bpf.c:450:1: error: no return statement in function returning non-void [-Werror=return-type] 450 | } | ^ net/sched/sch_bpf.c: At top level: 481 | .delete = sch_bpf_delete, | ^~~~~~~~~~~~~~ net/sched/sch_bpf.c:481:13: note: (near initialization for 'sch_bpf_class_ops.delete') 485 | .dump = sch_bpf_dump_class, | ^~~~~~~~~~~~~~~~~~ | sch_bpf_dump_prog 486 | .dump_stats = sch_bpf_dump_class_stats, | ^~~~~~~~~~~~~~~~~~~~~~~~ 498 | .reset = sch_bpf_reset, | ^~~~~~~~~~~~~ | sch_bpf_delete 502 | .dump_stats = sch_bpf_dump_stats, | ^~~~~~~~~~~~~~~~~~ | sch_bpf_dump_prog net/sched/sch_bpf.c:506:19: error: conflicting types for 'sch_bpf_init' 506 | static int __init sch_bpf_init(void) | ^~~~~~~~~~~~ net/sched/sch_bpf.c:382:12: note: previous definition of 'sch_bpf_init' was here 382 | static int sch_bpf_init(struct Qdisc *sch, struct nlattr *opt, | ^~~~~~~~~~~~ cc1: some warnings being treated as errors vim +389 include/linux/rcupdate.h 76c8eaafe4f061 Paul E. McKenney 2021-04-21 379 ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 380 #define __rcu_access_pointer(p, space) \ ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 381 ({ \ 7d0ae8086b8283 Paul E. McKenney 2015-03-03 382 typeof(*p) *_________p1 = (typeof(*p) *__force)READ_ONCE(p); \ 423a86a610cad1 Joel Fernandes (Google 2018-12-12 383) rcu_check_sparse(p, space); \ ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 384 ((typeof(*p) __force __kernel *)(_________p1)); \ ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 385 }) ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 386 #define __rcu_dereference_check(p, c, space) \ ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 387 ({ \ ac59853c06993a Pranith Kumar 2014-11-13 388 /* Dependency order vs. p above. */ \ 506458efaf153c Will Deacon 2017-10-24 @389 typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \ f78f5b90c4ffa5 Paul E. McKenney 2015-06-18 390 RCU_LOCKDEP_WARN(!(c), "suspicious rcu_dereference_check() usage"); \ 423a86a610cad1 Joel Fernandes (Google 2018-12-12 391) rcu_check_sparse(p, space); \ ac59853c06993a Pranith Kumar 2014-11-13 392 ((typeof(*p) __force __kernel *)(________p1)); \ ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 393 }) ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 394 #define __rcu_dereference_protected(p, c, space) \ ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 395 ({ \ f78f5b90c4ffa5 Paul E. McKenney 2015-06-18 396 RCU_LOCKDEP_WARN(!(c), "suspicious rcu_dereference_protected() usage"); \ 423a86a610cad1 Joel Fernandes (Google 2018-12-12 397) rcu_check_sparse(p, space); \ ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 398 ((typeof(*p) __force __kernel *)(p)); \ ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 399 }) 995f1405610bd8 Paul E. McKenney 2016-07-01 400 #define rcu_dereference_raw(p) \ 995f1405610bd8 Paul E. McKenney 2016-07-01 401 ({ \ 995f1405610bd8 Paul E. McKenney 2016-07-01 402 /* Dependency order vs. p above. */ \ 506458efaf153c Will Deacon 2017-10-24 403 typeof(p) ________p1 = READ_ONCE(p); \ 995f1405610bd8 Paul E. McKenney 2016-07-01 404 ((typeof(*p) __force __kernel *)(________p1)); \ 995f1405610bd8 Paul E. McKenney 2016-07-01 405 }) ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 406 :::::: The code at line 389 was first introduced by commit :::::: 506458efaf153c1ea480591c5602a5a3ba5a3b76 locking/barriers: Convert users of lockless_dereference() to READ_ONCE() :::::: TO: Will Deacon <will.deacon(a)arm.com&gt; :::::: CC: Ingo Molnar <mingo(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org