tree: https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git ftrace/core head: c8d01c02b46e599b057d7d24d1342ae9fcf828c2 commit: eff05923d317af757bb800c1dabc25388abda36b [1/2] tracing: Place trace_pid_list logic into abstract functions config: x86_64-randconfig-a014-20210928 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git/commit/?id=eff05923d317af757bb800c1dabc25388abda36b git remote add rostedt-trace https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git git fetch --no-tags rostedt-trace ftrace/core git checkout eff05923d317af757bb800c1dabc25388abda36b # save the attached .config to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): In file included from include/linux/workqueue.h:16, from kernel/trace/trace_events.c:14: kernel/trace/trace_events.c: In function 'trace_event_ignore_this_pid': >> include/linux/rcupdate.h:404:11: error: dereferencing pointer to incomplete type 'struct trace_pid_list' 404 | ((typeof(*p) __force __kernel *)(________p1)); \ kernel/trace/trace_events.c:450:13: note: in expansion of macro 'rcu_dereference_raw' 450 | pid_list = rcu_dereference_raw(tr->filtered_pids); | ^~~~~~~~~~~~~~~~~~~ vim +404 include/linux/rcupdate.h 76c8eaafe4f061f Paul E. McKenney 2021-04-21 379 ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 380 #define __rcu_access_pointer(p, space) \ ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 381 ({ \ 7d0ae8086b82831 Paul E. McKenney 2015-03-03 382 typeof(*p) *_________p1 = (typeof(*p) *__force)READ_ONCE(p); \ 423a86a610cad12 Joel Fernandes (Google 2018-12-12 383) rcu_check_sparse(p, space); \ ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 384 ((typeof(*p) __force __kernel *)(_________p1)); \ ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 385 }) ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 386 #define __rcu_dereference_check(p, c, space) \ ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 387 ({ \ ac59853c06993a4 Pranith Kumar 2014-11-13 388 /* Dependency order vs. p above. */ \ 506458efaf153c1 Will Deacon 2017-10-24 389 typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \ f78f5b90c4ffa55 Paul E. McKenney 2015-06-18 390 RCU_LOCKDEP_WARN(!(c), "suspicious rcu_dereference_check() usage"); \ 423a86a610cad12 Joel Fernandes (Google 2018-12-12 391) rcu_check_sparse(p, space); \ ac59853c06993a4 Pranith Kumar 2014-11-13 392 ((typeof(*p) __force __kernel *)(________p1)); \ ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 393 }) ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 394 #define __rcu_dereference_protected(p, c, space) \ ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 395 ({ \ f78f5b90c4ffa55 Paul E. McKenney 2015-06-18 396 RCU_LOCKDEP_WARN(!(c), "suspicious rcu_dereference_protected() usage"); \ 423a86a610cad12 Joel Fernandes (Google 2018-12-12 397) rcu_check_sparse(p, space); \ ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 398 ((typeof(*p) __force __kernel *)(p)); \ ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 399 }) 995f1405610bd84 Paul E. McKenney 2016-07-01 400 #define rcu_dereference_raw(p) \ 995f1405610bd84 Paul E. McKenney 2016-07-01 401 ({ \ 995f1405610bd84 Paul E. McKenney 2016-07-01 402 /* Dependency order vs. p above. */ \ 506458efaf153c1 Will Deacon 2017-10-24 403 typeof(p) ________p1 = READ_ONCE(p); \ 995f1405610bd84 Paul E. McKenney 2016-07-01 @404 ((typeof(*p) __force __kernel *)(________p1)); \ 995f1405610bd84 Paul E. McKenney 2016-07-01 405 }) ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 406 :::::: The code at line 404 was first introduced by commit :::::: 995f1405610bd8446c5be37d2ffc031a7729e406 rcu: Suppress sparse warnings for rcu_dereference_raw() :::::: TO: Paul E. McKenney :::::: CC: David Howells --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org