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X-CSE-ConnectionGUID: o/FTuDq9TLSWUYTBXhoubQ== X-CSE-MsgGUID: mBAPc7u2RgSI3nqxaN47tQ== X-IronPort-AV: E=McAfee;i="6800,10657,11675"; a="69217486" X-IronPort-AV: E=Sophos;i="6.21,237,1763452800"; d="scan'208";a="69217486" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Jan 2026 00:24:25 -0800 X-CSE-ConnectionGUID: 6JrKYD8FQiOuYUMvH+ySjQ== X-CSE-MsgGUID: qEu6BI5JSmWE3xRAdt9Yxw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,237,1763452800"; d="scan'208";a="228742759" Received: from lkp-server01.sh.intel.com (HELO 765f4a05e27f) ([10.239.97.150]) by fmviesa002.fm.intel.com with ESMTP; 19 Jan 2026 00:24:18 -0800 Received: from kbuild by 765f4a05e27f with local (Exim 4.98.2) (envelope-from ) id 1vhkYa-00000000Naz-080r; Mon, 19 Jan 2026 08:24:16 +0000 Date: Mon, 19 Jan 2026 16:23:31 +0800 From: kernel test robot To: Pingfan Liu , linux-arm-kernel@lists.infradead.org Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, Pingfan Liu , Alexei Starovoitov , Daniel Borkmann , John Fastabend , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , Jeremy Linton , Catalin Marinas , Will Deacon , Ard Biesheuvel , Simon Horman , Gerd Hoffmann , Vitaly Kuznetsov , Philipp Rudo , Viktor Malik , Jan Hendrik Farr , Baoquan He , Dave Young , Andrew Morton , Linux Memory Management List , kexec@lists.infradead.org, bpf@vger.kernel.org, systemd-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [PATCHv6 11/13] arm64/kexec: Select KEXEC_BPF to support UEFI-style kernel image Message-ID: <202601191626.CUD61tIS-lkp@intel.com> References: <20260119032424.10781-12-piliu@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260119032424.10781-12-piliu@redhat.com> X-Rspam-User: X-Stat-Signature: nh56widx4nwqcj88fk15xicgetywoq33 X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 70BC1C000C X-HE-Tag: 1768811066-907969 X-HE-Meta: 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 dxDs7Soy 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Pingfan, kernel test robot noticed the following build warnings: [auto build test WARNING on bpf-next/net] [also build test WARNING on bpf-next/master bpf/master akpm-mm/mm-nonmm-unstable linus/master v6.19-rc6 next-20260116] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Pingfan-Liu/bpf-Introduce-kfuncs-to-parser-buffer-content/20260119-112939 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git net patch link: https://lore.kernel.org/r/20260119032424.10781-12-piliu%40redhat.com patch subject: [PATCHv6 11/13] arm64/kexec: Select KEXEC_BPF to support UEFI-style kernel image config: arm64-randconfig-004-20260119 (https://download.01.org/0day-ci/archive/20260119/202601191626.CUD61tIS-lkp@intel.com/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260119/202601191626.CUD61tIS-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/202601191626.CUD61tIS-lkp@intel.com/ All warnings (new ones prefixed by >>): >> kernel/kexec_bpf_loader.c:103:22: warning: unknown attribute 'optimize' ignored [-Wunknown-attributes] 103 | __attribute__((used, optimize("O0"))) void kexec_image_parser_anchor( | ^~~~~~~~~~~~~~ 1 warning generated. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for KEXEC_BPF Depends on [n]: KEXEC_FILE [=y] && DEBUG_INFO_BTF [=y] && BPF_SYSCALL [=y] && KEEP_DECOMPRESSOR [=n] Selected by [y]: - ARCH_SELECTS_KEXEC_FILE [=y] && KEXEC_FILE [=y] && DEBUG_INFO_BTF [=y] && BPF_SYSCALL [=y] vim +/optimize +103 kernel/kexec_bpf_loader.c e683ae405ea0458 Pingfan Liu 2026-01-19 93 e683ae405ea0458 Pingfan Liu 2026-01-19 94 void kexec_image_parser_anchor(struct kexec_context *context, e683ae405ea0458 Pingfan Liu 2026-01-19 95 unsigned long parser_id); e683ae405ea0458 Pingfan Liu 2026-01-19 96 e683ae405ea0458 Pingfan Liu 2026-01-19 97 /* e683ae405ea0458 Pingfan Liu 2026-01-19 98 * optimize("O0") prevents inline, compiler constant propagation e683ae405ea0458 Pingfan Liu 2026-01-19 99 * e683ae405ea0458 Pingfan Liu 2026-01-19 100 * Let bpf be the program context pointer so that it will not be spilled into e683ae405ea0458 Pingfan Liu 2026-01-19 101 * stack. e683ae405ea0458 Pingfan Liu 2026-01-19 102 */ e683ae405ea0458 Pingfan Liu 2026-01-19 @103 __attribute__((used, optimize("O0"))) void kexec_image_parser_anchor( e683ae405ea0458 Pingfan Liu 2026-01-19 104 struct kexec_context *context, e683ae405ea0458 Pingfan Liu 2026-01-19 105 unsigned long parser_id) e683ae405ea0458 Pingfan Liu 2026-01-19 106 { e683ae405ea0458 Pingfan Liu 2026-01-19 107 /* e683ae405ea0458 Pingfan Liu 2026-01-19 108 * To prevent linker from Identical Code Folding (ICF) with kexec_image_parser_anchor, e683ae405ea0458 Pingfan Liu 2026-01-19 109 * making them have different code. e683ae405ea0458 Pingfan Liu 2026-01-19 110 */ e683ae405ea0458 Pingfan Liu 2026-01-19 111 volatile int dummy = 0; e683ae405ea0458 Pingfan Liu 2026-01-19 112 e683ae405ea0458 Pingfan Liu 2026-01-19 113 dummy += 1; e683ae405ea0458 Pingfan Liu 2026-01-19 114 } e683ae405ea0458 Pingfan Liu 2026-01-19 115 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki