From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) (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 B2A065CB9; Sun, 4 Jun 2023 16:08:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1685894939; x=1717430939; h=date:from:to:cc:subject:message-id:mime-version; bh=wUWTk6zRjgY3dY35Db6TK/S5kI1m01GuZLAw3jtnZ78=; b=Xt6/7u8OXaA48gockp8w6H9t6AdDCKhWziY5laH9Qsw8vXpOW1mJ7aSh N9fsYeVTPoKQ5IkaiKVylPv3XN8R5H+zRPU5TzZOjgCAaUs0g01dHzZNh cbTPiOrs6QbHJUijDKJ3BnNh2nUMXqToTCwWpNJTb1LjjvAEEYLTJKvGk nBKiOx292QQW+wyXV2CJgnVQTigBkM8N1LLsG2V31HSoAzla5Jf++wh3L Vn5USo50KXOo2QvtIKqXIG/sjauyXXr9TRIAVWSUJUZW+dWzUVpE6fApt ocsjAjEqed2C1vzfmDB/ukY6jHUnI8FwE36Z6OjX3zfJHL3/1zhyIqsHz A==; X-IronPort-AV: E=McAfee;i="6600,9927,10731"; a="340836897" X-IronPort-AV: E=Sophos;i="6.00,217,1681196400"; d="scan'208";a="340836897" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Jun 2023 09:08:59 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10731"; a="685866421" X-IronPort-AV: E=Sophos;i="6.00,217,1681196400"; d="scan'208";a="685866421" Received: from lkp-server01.sh.intel.com (HELO 15ab08e44a81) ([10.239.97.150]) by orsmga006.jf.intel.com with ESMTP; 04 Jun 2023 09:08:57 -0700 Received: from kbuild by 15ab08e44a81 with local (Exim 4.96) (envelope-from ) id 1q5qHp-00035N-0R; Sun, 04 Jun 2023 16:08:57 +0000 Date: Mon, 5 Jun 2023 00:08:10 +0800 From: kernel test robot To: "Paul E. McKenney" Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev Subject: [wtarreau-nolibc:20230604-nolibc-rv32+stkp6 78/118] kernel/rcu/tasks.h:1932:9: error: use of undeclared identifier 'rcu_tasks' Message-ID: <202306050029.1dxeRWhd-lkp@intel.com> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev 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/wtarreau/nolibc.git 20230604-nolibc-rv32+stkp6 head: a76324560e0f8f916d89452dd6aec1104e97a3c6 commit: 9486af7280fda4a0b8347a1abcdcaba70a67d89b [78/118] rcuscale: Measure RCU Tasks grace-period kthread CPU time config: s390-buildonly-randconfig-r006-20230604 (https://download.01.org/0day-ci/archive/20230605/202306050029.1dxeRWhd-lkp@intel.com/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 4faf3aaf28226a4e950c103a14f6fc1d1fdabb1b) reproduce (this is a W=1 build): mkdir -p ~/bin wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/nolibc.git/commit/?id=9486af7280fda4a0b8347a1abcdcaba70a67d89b git remote add wtarreau-nolibc https://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/nolibc.git git fetch --no-tags wtarreau-nolibc 20230604-nolibc-rv32+stkp6 git checkout 9486af7280fda4a0b8347a1abcdcaba70a67d89b # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=s390 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash kernel/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202306050029.1dxeRWhd-lkp@intel.com/ All error/warnings (new ones prefixed by >>): In file included from kernel/rcu/update.c:39: In file included from include/linux/tick.h:8: In file included from include/linux/clockchips.h:14: In file included from include/linux/clocksource.h:22: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x)) ^ include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16' #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x)) ^ In file included from kernel/rcu/update.c:39: In file included from include/linux/tick.h:8: In file included from include/linux/clockchips.h:14: In file included from include/linux/clocksource.h:22: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32' #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x)) ^ In file included from kernel/rcu/update.c:39: In file included from include/linux/tick.h:8: In file included from include/linux/clockchips.h:14: In file included from include/linux/clocksource.h:22: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ In file included from kernel/rcu/update.c:649: >> kernel/rcu/tasks.h:1932:9: error: use of undeclared identifier 'rcu_tasks' return rcu_tasks.kthread_ptr; ^ >> kernel/rcu/tasks.h:1930:21: warning: no previous prototype for function 'get_rcu_tasks_gp_kthread' [-Wmissing-prototypes] struct task_struct *get_rcu_tasks_gp_kthread(void) ^ kernel/rcu/tasks.h:1930:1: note: declare 'static' if the function is not intended to be used outside of this translation unit struct task_struct *get_rcu_tasks_gp_kthread(void) ^ static 13 warnings and 1 error generated. vim +/rcu_tasks +1932 kernel/rcu/tasks.h 1929 > 1930 struct task_struct *get_rcu_tasks_gp_kthread(void) 1931 { > 1932 return rcu_tasks.kthread_ptr; 1933 } 1934 EXPORT_SYMBOL_GPL(get_rcu_tasks_gp_kthread); 1935 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki