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X-IronPort-AV: E=McAfee;i="6200,9189,10226"; a="224141291" X-IronPort-AV: E=Sophos;i="5.88,287,1635231600"; d="scan'208";a="224141291" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jan 2022 17:28:19 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,287,1635231600"; d="scan'208";a="692020034" Received: from lkp-server01.sh.intel.com (HELO 276f1b88eecb) ([10.239.97.150]) by orsmga005.jf.intel.com with ESMTP; 13 Jan 2022 17:28:18 -0800 Received: from kbuild by 276f1b88eecb with local (Exim 4.92) (envelope-from ) id 1n8BO5-0007ti-QM; Fri, 14 Jan 2022 01:28:17 +0000 Date: Fri, 14 Jan 2022 09:27:33 +0800 From: kernel test robot To: Ingo Molnar Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org Subject: [mingo-tip:master 1471/2382] include/linux/rcupdate.h:380:9: error: dereferencing pointer to incomplete type 'struct task_struct' Message-ID: <202201140915.k0d5wA8g-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git master head: 1a880941a087613ed42f77001229edfcf75ea8a5 commit: 2343c4a8035421263b16ea777e945cc1b0cbd22f [1471/2382] headers/deps: rcu/wait: Remove from config: i386-randconfig-a003 (https://download.01.org/0day-ci/archive/20220114/202201140915.k0d5wA8g-lkp@intel.com/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/mingo/tip.git/commit/?id=2343c4a8035421263b16ea777e945cc1b0cbd22f 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 2343c4a8035421263b16ea777e945cc1b0cbd22f # 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 All errors (new ones prefixed by >>): In file included from include/linux/workqueue.h:16, from include/linux/workqueue_api.h:2, from arch/x86/kvm/lapic.c:19: include/linux/rcuwait.h: In function 'rcuwait_active': >> include/linux/rcupdate.h:380:9: error: dereferencing pointer to incomplete type 'struct task_struct' 380 | typeof(*p) *_________p1 = (typeof(*p) *__force)READ_ONCE(p); \ | ^ include/linux/rcupdate.h:490:31: note: in expansion of macro '__rcu_access_pointer' 490 | #define rcu_access_pointer(p) __rcu_access_pointer((p), __rcu) | ^~~~~~~~~~~~~~~~~~~~ include/linux/rcuwait.h:33:11: note: in expansion of macro 'rcu_access_pointer' 33 | return !!rcu_access_pointer(w->task); | ^~~~~~~~~~~~~~~~~~ In file included from include/linux/rcuwait_api.h:1, from arch/x86/kvm/lapic.c:20: include/linux/rcuwait.h:34:1: error: control reaches end of non-void function [-Werror=return-type] 34 | } | ^ cc1: some warnings being treated as errors -- In file included from include/linux/rcuwait.h:5, from include/linux/irq_work.h:7, from arch/x86/include/asm/nmi.h:5, from arch/x86/kernel/cpu/perfctr-watchdog.c:20: include/linux/rcuwait.h: In function 'rcuwait_active': >> include/linux/rcupdate.h:380:9: error: dereferencing pointer to incomplete type 'struct task_struct' 380 | typeof(*p) *_________p1 = (typeof(*p) *__force)READ_ONCE(p); \ | ^ include/linux/rcupdate.h:490:31: note: in expansion of macro '__rcu_access_pointer' 490 | #define rcu_access_pointer(p) __rcu_access_pointer((p), __rcu) | ^~~~~~~~~~~~~~~~~~~~ include/linux/rcuwait.h:33:11: note: in expansion of macro 'rcu_access_pointer' 33 | return !!rcu_access_pointer(w->task); | ^~~~~~~~~~~~~~~~~~ vim +380 include/linux/rcupdate.h 76c8eaafe4f061f Paul E. McKenney 2021-04-21 377 ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 378 #define __rcu_access_pointer(p, space) \ ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 379 ({ \ 7d0ae8086b82831 Paul E. McKenney 2015-03-03 @380 typeof(*p) *_________p1 = (typeof(*p) *__force)READ_ONCE(p); \ 423a86a610cad12 Joel Fernandes (Google 2018-12-12 381) rcu_check_sparse(p, space); \ ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 382 ((typeof(*p) __force __kernel *)(_________p1)); \ ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 383 }) ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 384 #define __rcu_dereference_check(p, c, space) \ ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 385 ({ \ ac59853c06993a4 Pranith Kumar 2014-11-13 386 /* Dependency order vs. p above. */ \ 506458efaf153c1 Will Deacon 2017-10-24 387 typeof(*p) *________p1 = (typeof(*p) *__force)READ_ONCE(p); \ f78f5b90c4ffa55 Paul E. McKenney 2015-06-18 388 RCU_LOCKDEP_WARN(!(c), "suspicious rcu_dereference_check() usage"); \ 423a86a610cad12 Joel Fernandes (Google 2018-12-12 389) rcu_check_sparse(p, space); \ ac59853c06993a4 Pranith Kumar 2014-11-13 390 ((typeof(*p) __force __kernel *)(________p1)); \ ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 391 }) ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 392 #define __rcu_dereference_protected(p, c, space) \ ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 393 ({ \ f78f5b90c4ffa55 Paul E. McKenney 2015-06-18 394 RCU_LOCKDEP_WARN(!(c), "suspicious rcu_dereference_protected() usage"); \ 423a86a610cad12 Joel Fernandes (Google 2018-12-12 395) rcu_check_sparse(p, space); \ ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 396 ((typeof(*p) __force __kernel *)(p)); \ ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 397 }) 995f1405610bd84 Paul E. McKenney 2016-07-01 398 #define rcu_dereference_raw(p) \ 995f1405610bd84 Paul E. McKenney 2016-07-01 399 ({ \ 995f1405610bd84 Paul E. McKenney 2016-07-01 400 /* Dependency order vs. p above. */ \ 506458efaf153c1 Will Deacon 2017-10-24 401 typeof(p) ________p1 = READ_ONCE(p); \ 995f1405610bd84 Paul E. McKenney 2016-07-01 402 ((typeof(*p) __force __kernel *)(________p1)); \ 995f1405610bd84 Paul E. McKenney 2016-07-01 403 }) ca5ecddfa8fcbd9 Paul E. McKenney 2010-04-28 404 :::::: The code at line 380 was first introduced by commit :::::: 7d0ae8086b828311250c6afdf800b568ac9bd693 rcu: Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE() :::::: TO: Paul E. McKenney :::::: CC: Paul E. McKenney --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org