Messages in this thread | | | Date | Thu, 17 Mar 2022 12:17:31 +0800 | From | kernel test robot <> | Subject | [mingo-tip:master 1440/2335] include/linux/rcupdate.h:381:9: error: dereferencing pointer to incomplete type 'struct task_struct' |
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tree: git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git master head: 85293bf3fca6d85608cff1447ce3097583f15fab commit: 60aa8b48a7618b32090b091987090a4795b278cb [1440/2335] headers/deps: rcu/wait: Remove <linux/sched/task_flags.h> from <linux/rcuwait.h> config: i386-randconfig-a001-20220314 (https://download.01.org/0day-ci/archive/20220317/202203171240.Swhj47Ft-lkp@intel.com/config) compiler: gcc-9 (Ubuntu 9.4.0-1ubuntu1~20.04) 9.4.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git/commit/?id=60aa8b48a7618b32090b091987090a4795b278cb git remote add mingo-tip git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git git fetch --no-tags mingo-tip master git checkout 60aa8b48a7618b32090b091987090a4795b278cb # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
In file included from include/linux/rcuwait.h:5, from include/linux/percpu_rwsem.h:7, from include/linux/percpu_rwsem_api.h:2, from fs/ext4/migrate.c:10: include/linux/rcuwait.h: In function 'rcuwait_active': >> include/linux/rcupdate.h:381:9: error: dereferencing pointer to incomplete type 'struct task_struct' 381 | typeof(*p) *local = (typeof(*p) *__force)READ_ONCE(p); \ | ^ include/linux/rcupdate.h:492:31: note: in expansion of macro '__rcu_access_pointer' 492 | #define rcu_access_pointer(p) __rcu_access_pointer((p), __UNIQUE_ID(rcu), __rcu) | ^~~~~~~~~~~~~~~~~~~~ include/linux/rcuwait.h:33:11: note: in expansion of macro 'rcu_access_pointer' 33 | return !!rcu_access_pointer(w->task); | ^~~~~~~~~~~~~~~~~~
vim +381 include/linux/rcupdate.h
76c8eaafe4f061 Paul E. McKenney 2021-04-21 378 24ba53017e188e Chun-Hung Tseng 2021-09-15 379 #define __rcu_access_pointer(p, local, space) \ ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 380 ({ \ 24ba53017e188e Chun-Hung Tseng 2021-09-15 @381 typeof(*p) *local = (typeof(*p) *__force)READ_ONCE(p); \ 423a86a610cad1 Joel Fernandes (Google 2018-12-12 382) rcu_check_sparse(p, space); \ 24ba53017e188e Chun-Hung Tseng 2021-09-15 383 ((typeof(*p) __force __kernel *)(local)); \ ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 384 }) 24ba53017e188e Chun-Hung Tseng 2021-09-15 385 #define __rcu_dereference_check(p, local, c, space) \ ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 386 ({ \ ac59853c06993a Pranith Kumar 2014-11-13 387 /* Dependency order vs. p above. */ \ 24ba53017e188e Chun-Hung Tseng 2021-09-15 388 typeof(*p) *local = (typeof(*p) *__force)READ_ONCE(p); \ f78f5b90c4ffa5 Paul E. McKenney 2015-06-18 389 RCU_LOCKDEP_WARN(!(c), "suspicious rcu_dereference_check() usage"); \ 423a86a610cad1 Joel Fernandes (Google 2018-12-12 390) rcu_check_sparse(p, space); \ 24ba53017e188e Chun-Hung Tseng 2021-09-15 391 ((typeof(*p) __force __kernel *)(local)); \ ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 392 }) 24ba53017e188e Chun-Hung Tseng 2021-09-15 393 #define __rcu_dereference_protected(p, local, c, space) \ ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 394 ({ \ f78f5b90c4ffa5 Paul E. McKenney 2015-06-18 395 RCU_LOCKDEP_WARN(!(c), "suspicious rcu_dereference_protected() usage"); \ 423a86a610cad1 Joel Fernandes (Google 2018-12-12 396) rcu_check_sparse(p, space); \ ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 397 ((typeof(*p) __force __kernel *)(p)); \ ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 398 }) 24ba53017e188e Chun-Hung Tseng 2021-09-15 399 #define __rcu_dereference_raw(p, local) \ 995f1405610bd8 Paul E. McKenney 2016-07-01 400 ({ \ 995f1405610bd8 Paul E. McKenney 2016-07-01 401 /* Dependency order vs. p above. */ \ 24ba53017e188e Chun-Hung Tseng 2021-09-15 402 typeof(p) local = READ_ONCE(p); \ 24ba53017e188e Chun-Hung Tseng 2021-09-15 403 ((typeof(*p) __force __kernel *)(local)); \ 995f1405610bd8 Paul E. McKenney 2016-07-01 404 }) 24ba53017e188e Chun-Hung Tseng 2021-09-15 405 #define rcu_dereference_raw(p) __rcu_dereference_raw(p, __UNIQUE_ID(rcu)) ca5ecddfa8fcbd Paul E. McKenney 2010-04-28 406
:::::: The code at line 381 was first introduced by commit :::::: 24ba53017e188e031f9cb8b290286fad52d2af00 rcu: Replace ________p1 and _________p1 with __UNIQUE_ID(rcu)
:::::: TO: Chun-Hung Tseng <henrybear327@gmail.com> :::::: CC: Paul E. McKenney <paulmck@kernel.org>
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