From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.21]) (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 1A0711A681B for ; Sun, 3 May 2026 00:39:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.21 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777768791; cv=none; b=hlneo1DuRc8KpNz4VUpfuIQqhUlIpSD7KJ55oddmjDywej/aP8KJz3SBTTE2kbmvFL3DcRpEfHxS0NA6KrMihGHbNkbnFcndQpVK64UhRFDqiS+KxpMnXzjXBGx91YCo3zCQ+uZuwFoNagTXOP94shRVIQuCqvakaskkLOcU3Qk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777768791; c=relaxed/simple; bh=9DMdj+lxAK0PyvUwtzn0SS6CKoLBEVzOEwQjkKhaOrk=; h=Date:From:To:Cc:Subject:Message-ID; b=JZ++rf6l4820M3xVrWkL1a/Bu99DKOiuf7pH4DdS50Ux513IrHYU+jLyd1UMxsuMXfX2JSSuDItmK2ppbdx7B0MAR8ITqPgThtt1XE3e+WzPjtc6IkTH7BCrcijRKpkqtKu3IRKK5DL5jkBtu2YBF49J/Q+mQ0aQ8kbZWVuABNU= 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=KU8WStx6; arc=none smtp.client-ip=198.175.65.21 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="KU8WStx6" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1777768791; x=1809304791; h=date:from:to:cc:subject:message-id; bh=9DMdj+lxAK0PyvUwtzn0SS6CKoLBEVzOEwQjkKhaOrk=; b=KU8WStx6itC7YLndcIFLE/spRPW6OEopFD4f/vE+rYGWOwXshsEdjs98 OWlhnfIbRsC99p3zS+RN0AnA/7VxyKNHPcMnDVyJpaJ1H3bPI+H1hbeJN SIIrkcU6kqpGUtaLGnMfX5P5F6w+mct/d9gZHUsKxd0zshiEvm1bAVBjB RGDBQ53u4FCi3IYvS0vRZn+W8EsHYOfK/omM70uSLvVsSXNYjhwwZ3nAm Y8aoYeOlv7KqUWHfUEr3r5KBOSk7ULQDXPqNuCuz8fy6jEakvkRSPRgbQ xpIUh3t+voMJG1Mu6SYYtqJQGuVQwkaNdi2v5cMNiZoY7ZtFdjATKkh7K Q==; X-CSE-ConnectionGUID: gW5TclVQT/yqaDrKsawojg== X-CSE-MsgGUID: lSikc4k5QVuRbXbVqnLq1A== X-IronPort-AV: E=McAfee;i="6800,10657,11774"; a="78579730" X-IronPort-AV: E=Sophos;i="6.23,213,1770624000"; d="scan'208";a="78579730" Received: from orviesa005.jf.intel.com ([10.64.159.145]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 May 2026 17:39:50 -0700 X-CSE-ConnectionGUID: l2Cc0s/zQnSj/1q/ZNLfRA== X-CSE-MsgGUID: l071KC9xS52TIgqR10TMIA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,213,1770624000"; d="scan'208";a="240180158" Received: from lkp-server01.sh.intel.com (HELO 781826d00641) ([10.239.97.150]) by orviesa005.jf.intel.com with ESMTP; 02 May 2026 17:39:48 -0700 Received: from kbuild by 781826d00641 with local (Exim 4.98.2) (envelope-from ) id 1wJKs5-000000001xR-2ojV; Sun, 03 May 2026 00:39:45 +0000 Date: Sun, 03 May 2026 08:39:29 +0800 From: kernel test robot To: "Harry Yoo (Oracle)" Cc: oe-kbuild-all@lists.linux.dev Subject: [harry:kvfree-rcu-improvements-rfc-v2r1-wip 1/9] include/linux/build_bug.h:78:41: error: static assertion failed: "sizeof(struct rcu_head) == sizeof(struct rcu_ptr)" Message-ID: <202605030815.Ko3pJXtp-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: oe-kbuild-all@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: tree: https://git.kernel.org/pub/scm/linux/kernel/git/harry/linux.git kvfree-rcu-improvements-rfc-v2r1-wip head: 1e4fd024c798fbeff0b5a3c5f55cdcf710367c59 commit: dd7b7336ad2c3f9589f28e095aed50717e65f0d5 [1/9] mm/slab: introduce k[v]free_rcu() with struct rcu_ptr config: mips-allnoconfig (https://download.01.org/0day-ci/archive/20260503/202605030815.Ko3pJXtp-lkp@intel.com/config) compiler: mips-linux-gcc (GCC) 15.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260503/202605030815.Ko3pJXtp-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/202605030815.Ko3pJXtp-lkp@intel.com/ Note: the harry/kvfree-rcu-improvements-rfc-v2r1-wip HEAD 1e4fd024c798fbeff0b5a3c5f55cdcf710367c59 builds fine. It only hurts bisectability. All error/warnings (new ones prefixed by >>): In file included from include/uapi/linux/time.h:5, from include/vdso/auxclock.h:5, from lib/vdso/gettimeofday.c:5, from : >> include/linux/types.h:257:29: warning: declaration does not declare anything 257 | struct callback_head; | ^ In file included from include/linux/container_of.h:5, from include/linux/kernel.h:22, from arch/mips/include/asm/page.h:14, from include/linux/mm_types_task.h:14, from include/linux/mm_types.h:5, from arch/mips/include/asm/vdso.h:10, from arch/mips/include/asm/vdso/vdso.h:15, from arch/mips/include/asm/vdso/gettimeofday.h:16, from include/vdso/datapage.h:196, from lib/vdso/gettimeofday.c:6: >> include/linux/build_bug.h:78:41: error: static assertion failed: "sizeof(struct rcu_head) == sizeof(struct rcu_ptr)" 78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) | ^~~~~~~~~~~~~~ include/linux/build_bug.h:77:34: note: in expansion of macro '__static_assert' 77 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) | ^~~~~~~~~~~~~~~ include/linux/rcupdate.h:1127:1: note: in expansion of macro 'static_assert' 1127 | static_assert(sizeof(struct rcu_head) == sizeof(struct rcu_ptr)); | ^~~~~~~~~~~~~ vim +78 include/linux/build_bug.h bc6245e5efd70c4 Ian Abbott 2017-07-10 60 6bab69c65013bed Rasmus Villemoes 2019-03-07 61 /** 6bab69c65013bed Rasmus Villemoes 2019-03-07 62 * static_assert - check integer constant expression at build time 6bab69c65013bed Rasmus Villemoes 2019-03-07 63 * 6bab69c65013bed Rasmus Villemoes 2019-03-07 64 * static_assert() is a wrapper for the C11 _Static_assert, with a 6bab69c65013bed Rasmus Villemoes 2019-03-07 65 * little macro magic to make the message optional (defaulting to the 6bab69c65013bed Rasmus Villemoes 2019-03-07 66 * stringification of the tested expression). 6bab69c65013bed Rasmus Villemoes 2019-03-07 67 * 6bab69c65013bed Rasmus Villemoes 2019-03-07 68 * Contrary to BUILD_BUG_ON(), static_assert() can be used at global 6bab69c65013bed Rasmus Villemoes 2019-03-07 69 * scope, but requires the expression to be an integer constant 6bab69c65013bed Rasmus Villemoes 2019-03-07 70 * expression (i.e., it is not enough that __builtin_constant_p() is 6bab69c65013bed Rasmus Villemoes 2019-03-07 71 * true for expr). 6bab69c65013bed Rasmus Villemoes 2019-03-07 72 * 6bab69c65013bed Rasmus Villemoes 2019-03-07 73 * Also note that BUILD_BUG_ON() fails the build if the condition is 6bab69c65013bed Rasmus Villemoes 2019-03-07 74 * true, while static_assert() fails the build if the expression is 6bab69c65013bed Rasmus Villemoes 2019-03-07 75 * false. 6bab69c65013bed Rasmus Villemoes 2019-03-07 76 */ 6bab69c65013bed Rasmus Villemoes 2019-03-07 77 #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) 6bab69c65013bed Rasmus Villemoes 2019-03-07 @78 #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) 6bab69c65013bed Rasmus Villemoes 2019-03-07 79 07a368b3f55a79d Maxim Levitsky 2022-10-25 80 :::::: The code at line 78 was first introduced by commit :::::: 6bab69c65013bed5fce9f101a64a84d0385b3946 build_bug.h: add wrapper for _Static_assert :::::: TO: Rasmus Villemoes :::::: CC: Linus Torvalds -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki