From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6C5BE2DF707 for ; Thu, 11 Dec 2025 16:10:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.8 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765469417; cv=none; b=t7cvOcGQHCPYgttUlrcFZdAxeaBcpzLoegbTFrVIXMIs3S72RT4EYD8M6lAyoNWr/+wNlj1VTSknBZtsXOn0z8bq2b6n9VM+9TUTmP3Y2nZ3EKGf0SPgPbDvY9IZcdxyYRXG/fWz2At9L6h1rU5muApwnB4mYre1dlRgK3ju/Tg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765469417; c=relaxed/simple; bh=adtK50VYFhJYnd7i6hkUCCdmwOdFQKv21zD+Kwtyb+M=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=Sq8BgluIJCx/agZEaivKIDhbIhjzF9RqXYffpm1ViTSTkCTAwWM1o6KpG5ZwjoH4Du61n5u/aftOwyjX2YptK46hz/J9FaPM+A3eMzhtMPUtRpR0gGK3/8dD93Ct8vza+PHooGz19gB2YhnT0wkb1DxjTX+ZgVvJDmq/ToI6IfE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=R5yXcNgH; arc=none smtp.client-ip=192.198.163.8 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="R5yXcNgH" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1765469415; x=1797005415; h=date:from:to:cc:subject:message-id:mime-version; bh=adtK50VYFhJYnd7i6hkUCCdmwOdFQKv21zD+Kwtyb+M=; b=R5yXcNgHOuKk79xLbkXT3SrhzhpZCwwbRw7jz5id3rOC+oFoKdQ0UOCn C0AFELboVg2OLw8ZV+aJVh9QK1IjoYAIsELB95UQX/vcpHscPUZm/IEas +O75YtR0Zd/KbVLF/BLEgm45cpW5HEZx8yJ9ZtsMwun6p4VuCyDeofAE0 ySloc4Lo2+OFoSA3aN5MNH6szPKfJfl6XSM2HrCFoe8wtcI8SPGeQSRyO jPT+H8sfj7dBkgUdwyLL12r/2hWwIUPo7g9Uurq3SZ6vKfOpbd1j2Vigi PtQrANjmBQd7jnySg25oJMISXs4dhd4OsFeaTvGFO/HqC1UrH26zE117t g==; X-CSE-ConnectionGUID: mIE+mhpzSiyoTsnjxRGorQ== X-CSE-MsgGUID: Cqw+F6nZRgyMtCPCmUWSHA== X-IronPort-AV: E=McAfee;i="6800,10657,11639"; a="85062052" X-IronPort-AV: E=Sophos;i="6.21,141,1763452800"; d="scan'208";a="85062052" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Dec 2025 08:10:13 -0800 X-CSE-ConnectionGUID: tz0pC+R0Rp+/XlakU7zitg== X-CSE-MsgGUID: z/ccmaG3RSW4Y1qu6AOhWw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,141,1763452800"; d="scan'208";a="196838829" Received: from lkp-server01.sh.intel.com (HELO d335e3c6db51) ([10.239.97.150]) by orviesa007.jf.intel.com with ESMTP; 11 Dec 2025 08:10:12 -0800 Received: from kbuild by d335e3c6db51 with local (Exim 4.98.2) (envelope-from ) id 1vTjF3-000000004rL-2FPe; Thu, 11 Dec 2025 16:10:09 +0000 Date: Fri, 12 Dec 2025 00:10:04 +0800 From: kernel test robot To: Ingo Molnar Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org Subject: kernel/sched/rt.c:1656:15: sparse: sparse: dereference of noderef expression Message-ID: <202512120039.K3b6g8aA-lkp@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: d358e5254674b70f34c847715ca509e46eb81e6f commit: ea100b31eed459ea32d6df4489cf70219fd83a07 sched/smp: Use the SMP version of task_on_cpu() date: 6 months ago config: arm-randconfig-r111-20251211 (https://download.01.org/0day-ci/archive/20251212/202512120039.K3b6g8aA-lkp@intel.com/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 6ec8c4351cfc1d0627d1633b02ea787bd29c77d8) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251212/202512120039.K3b6g8aA-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 | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202512120039.K3b6g8aA-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) kernel/sched/deadline.c:2634:23: sparse: got struct task_struct [noderef] __rcu *donor kernel/sched/deadline.c:2644:13: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/deadline.c:2644:13: sparse: struct task_struct * kernel/sched/deadline.c:2644:13: sparse: struct task_struct [noderef] __rcu * kernel/sched/deadline.c:2750:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/deadline.c:2750:25: sparse: struct task_struct * kernel/sched/deadline.c:2750:25: sparse: struct task_struct [noderef] __rcu * kernel/sched/deadline.c:2278:42: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct sched_dl_entity const *b @@ got struct sched_dl_entity [noderef] __rcu * @@ kernel/sched/deadline.c:2278:42: sparse: expected struct sched_dl_entity const *b kernel/sched/deadline.c:2278:42: sparse: got struct sched_dl_entity [noderef] __rcu * kernel/sched/deadline.c:2288:38: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *tsk @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/deadline.c:2288:38: sparse: expected struct task_struct *tsk kernel/sched/deadline.c:2288:38: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/deadline.c:1197:39: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/deadline.c:1197:39: sparse: expected struct task_struct *p kernel/sched/deadline.c:1197:39: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/deadline.c:1197:85: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct sched_dl_entity const *b @@ got struct sched_dl_entity [noderef] __rcu * @@ kernel/sched/deadline.c:1197:85: sparse: expected struct sched_dl_entity const *b kernel/sched/deadline.c:1197:85: sparse: got struct sched_dl_entity [noderef] __rcu * kernel/sched/deadline.c:1295:23: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *donor @@ kernel/sched/deadline.c:1295:23: sparse: expected struct task_struct *p kernel/sched/deadline.c:1295:23: sparse: got struct task_struct [noderef] __rcu *donor kernel/sched/deadline.c:1604:31: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/deadline.c:1604:31: sparse: expected struct task_struct *p kernel/sched/deadline.c:1604:31: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/deadline.c:1604:70: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct sched_dl_entity const *b @@ got struct sched_dl_entity [noderef] __rcu * @@ kernel/sched/deadline.c:1604:70: sparse: expected struct sched_dl_entity const *b kernel/sched/deadline.c:1604:70: sparse: got struct sched_dl_entity [noderef] __rcu * kernel/sched/deadline.c:1693:39: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *donor @@ got struct task_struct [noderef] __rcu *donor @@ kernel/sched/deadline.c:1693:39: sparse: expected struct task_struct *donor kernel/sched/deadline.c:1693:39: sparse: got struct task_struct [noderef] __rcu *donor kernel/sched/deadline.c:2495:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@ kernel/sched/deadline.c:2495:9: sparse: expected struct sched_domain *[assigned] sd kernel/sched/deadline.c:2495:9: sparse: got struct sched_domain [noderef] __rcu *parent kernel/sched/deadline.c:2164:14: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu * @@ kernel/sched/deadline.c:2164:14: sparse: expected struct task_struct *curr kernel/sched/deadline.c:2164:14: sparse: got struct task_struct [noderef] __rcu * kernel/sched/deadline.c:2165:15: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *donor @@ got struct task_struct [noderef] __rcu * @@ kernel/sched/deadline.c:2165:15: sparse: expected struct task_struct *donor kernel/sched/deadline.c:2165:15: sparse: got struct task_struct [noderef] __rcu * kernel/sched/deadline.c:2240:43: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *donor @@ kernel/sched/deadline.c:2240:43: sparse: expected struct task_struct *p kernel/sched/deadline.c:2240:43: sparse: got struct task_struct [noderef] __rcu *donor kernel/sched/deadline.c:2795:38: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *tsk @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/deadline.c:2795:38: sparse: expected struct task_struct *tsk kernel/sched/deadline.c:2795:38: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/deadline.c:2797:23: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *donor @@ kernel/sched/deadline.c:2797:23: sparse: expected struct task_struct *p kernel/sched/deadline.c:2797:23: sparse: got struct task_struct [noderef] __rcu *donor kernel/sched/deadline.c:2799:44: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct sched_dl_entity const *b @@ got struct sched_dl_entity [noderef] __rcu * @@ kernel/sched/deadline.c:2799:44: sparse: expected struct sched_dl_entity const *b kernel/sched/deadline.c:2799:44: sparse: got struct sched_dl_entity [noderef] __rcu * kernel/sched/deadline.c:2986:23: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/deadline.c:2986:23: sparse: struct task_struct [noderef] __rcu * kernel/sched/deadline.c:2986:23: sparse: struct task_struct * kernel/sched/deadline.c:3032:32: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/build_policy.c: note: in included file: kernel/sched/syscalls.c:206:22: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/syscalls.c:206:22: sparse: struct task_struct [noderef] __rcu * kernel/sched/syscalls.c:206:22: sparse: struct task_struct * kernel/sched/build_policy.c: note: in included file: kernel/sched/sched.h:2225:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:2225:25: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:2225:25: sparse: struct task_struct * kernel/sched/sched.h:2225:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:2225:25: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:2225:25: sparse: struct task_struct * kernel/sched/sched.h:2236:26: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:2236:26: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:2236:26: sparse: struct task_struct * kernel/sched/sched.h:2225:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:2225:25: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:2225:25: sparse: struct task_struct * kernel/sched/sched.h:2236:26: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:2236:26: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:2236:26: sparse: struct task_struct * kernel/sched/sched.h:2225:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:2225:25: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:2225:25: sparse: struct task_struct * kernel/sched/sched.h:2225:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:2225:25: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:2225:25: sparse: struct task_struct * kernel/sched/sched.h:2236:26: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:2236:26: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:2236:26: sparse: struct task_struct * kernel/sched/sched.h:2236:26: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:2236:26: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:2236:26: sparse: struct task_struct * kernel/sched/sched.h:2419:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:2419:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:2419:9: sparse: struct task_struct * kernel/sched/sched.h:2236:26: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:2236:26: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:2236:26: sparse: struct task_struct * kernel/sched/sched.h:2419:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:2419:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:2419:9: sparse: struct task_struct * kernel/sched/build_policy.c: note: in included file: kernel/sched/syscalls.c:1289:6: sparse: sparse: context imbalance in 'sched_getaffinity' - different lock contexts for basic block kernel/sched/build_policy.c: note: in included file: >> kernel/sched/rt.c:1656:15: sparse: sparse: dereference of noderef expression vim +1656 kernel/sched/rt.c bb44e5d1c6b3b7 kernel/sched_rt.c Ingo Molnar 2007-07-09 1635 a0e813f26ebcb2 kernel/sched/rt.c Peter Zijlstra 2019-11-08 1636 static inline void set_next_task_rt(struct rq *rq, struct task_struct *p, bool first) ff1cdc94de4d33 kernel/sched/rt.c Muchun Song 2018-10-26 1637 { 57a5c2dafca8e3 kernel/sched/rt.c Yafang Shao 2021-09-05 1638 struct sched_rt_entity *rt_se = &p->rt; 57a5c2dafca8e3 kernel/sched/rt.c Yafang Shao 2021-09-05 1639 struct rt_rq *rt_rq = &rq->rt; 57a5c2dafca8e3 kernel/sched/rt.c Yafang Shao 2021-09-05 1640 ff1cdc94de4d33 kernel/sched/rt.c Muchun Song 2018-10-26 1641 p->se.exec_start = rq_clock_task(rq); 57a5c2dafca8e3 kernel/sched/rt.c Yafang Shao 2021-09-05 1642 if (on_rt_rq(&p->rt)) 57a5c2dafca8e3 kernel/sched/rt.c Yafang Shao 2021-09-05 1643 update_stats_wait_end_rt(rt_rq, rt_se); ff1cdc94de4d33 kernel/sched/rt.c Muchun Song 2018-10-26 1644 ff1cdc94de4d33 kernel/sched/rt.c Muchun Song 2018-10-26 1645 /* The running task is never eligible for pushing */ ff1cdc94de4d33 kernel/sched/rt.c Muchun Song 2018-10-26 1646 dequeue_pushable_task(rq, p); f95d4eaee6d020 kernel/sched/rt.c Peter Zijlstra 2019-05-29 1647 a0e813f26ebcb2 kernel/sched/rt.c Peter Zijlstra 2019-11-08 1648 if (!first) a0e813f26ebcb2 kernel/sched/rt.c Peter Zijlstra 2019-11-08 1649 return; a0e813f26ebcb2 kernel/sched/rt.c Peter Zijlstra 2019-11-08 1650 f95d4eaee6d020 kernel/sched/rt.c Peter Zijlstra 2019-05-29 1651 /* f95d4eaee6d020 kernel/sched/rt.c Peter Zijlstra 2019-05-29 1652 * If prev task was rt, put_prev_task() has already updated the f95d4eaee6d020 kernel/sched/rt.c Peter Zijlstra 2019-05-29 1653 * utilization. We only care of the case where we start to schedule a f95d4eaee6d020 kernel/sched/rt.c Peter Zijlstra 2019-05-29 1654 * rt task f95d4eaee6d020 kernel/sched/rt.c Peter Zijlstra 2019-05-29 1655 */ af0c8b2bf67b25 kernel/sched/rt.c Peter Zijlstra 2024-10-09 @1656 if (rq->donor->sched_class != &rt_sched_class) f95d4eaee6d020 kernel/sched/rt.c Peter Zijlstra 2019-05-29 1657 update_rt_rq_load_avg(rq_clock_pelt(rq), rq, 0); f95d4eaee6d020 kernel/sched/rt.c Peter Zijlstra 2019-05-29 1658 f95d4eaee6d020 kernel/sched/rt.c Peter Zijlstra 2019-05-29 1659 rt_queue_push_tasks(rq); ff1cdc94de4d33 kernel/sched/rt.c Muchun Song 2018-10-26 1660 } ff1cdc94de4d33 kernel/sched/rt.c Muchun Song 2018-10-26 1661 :::::: The code at line 1656 was first introduced by commit :::::: af0c8b2bf67b25756f27644936e74fd9a6273bd2 sched: Split scheduler and execution contexts :::::: TO: Peter Zijlstra :::::: CC: Peter Zijlstra -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki