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X-CSE-ConnectionGUID: nZz+iT0FT4Gtjjrm6UyFQQ== X-CSE-MsgGUID: KfBD+IXyTKe88OgG+1xkNg== X-IronPort-AV: E=McAfee;i="6800,10657,11909"; a="107844602" X-IronPort-AV: E=Sophos;i="6.27,109,1787036400"; d="scan'208";a="107844602" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Sep 2026 01:28:21 -0700 X-CSE-ConnectionGUID: J2F95I88S7isZx+eMxkUjQ== X-CSE-MsgGUID: bnPZekHQTfOn3kCKw9GsAw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,109,1787036400"; d="scan'208";a="298197932" Received: from lkp-server01.sh.intel.com (HELO 462990a40a85) ([10.239.97.150]) by fmviesa002.fm.intel.com with ESMTP; 19 Sep 2026 01:28:20 -0700 Received: from kbuild by 462990a40a85 with local (Exim 4.98.2) (envelope-from ) id 1x7qQg-00000000Am1-02Iy; Sat, 19 Sep 2026 08:28:14 +0000 Date: Sat, 19 Sep 2026 16:28:02 +0800 From: kernel test robot To: oe-kbuild@lists.linux.dev Cc: lkp@intel.com Subject: [android-common:android13-5.10 1/1] arch/x86/kernel/static_call.c:19:17: warning: 'tramp_ud' defined but not used Message-ID: <202609191635.PJEhAHNl-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: oe-kbuild@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: :::::: :::::: Manual check reason: "extra build warning to Peter Zijlstra" :::::: BCC: lkp@intel.com CC: oe-kbuild-all@lists.linux.dev TO: cros-kernel-buildreports@googlegroups.com Hi Peter, FYI, the error/warning still remains. tree: https://android.googlesource.com/kernel/common android13-5.10 head: 428b47f4651829663d19455bcf5132040b155e86 commit: 7723edf5edfdfdabd8234e45142be86598a04cad [1/1] x86,static_call: Use alternative RET encoding :::::: branch date: 33 hours ago :::::: commit date: 4 years, 2 months ago config: i386-randconfig-r1307-20260917 (https://download.01.org/0day-ci/archive/20260919/202609191635.PJEhAHNl-lkp@intel.com/config) compiler: gcc-13 (Debian 13.3.0-16) 13.3.0 sparse: v0.6.5-rc1 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260919/202609191635.PJEhAHNl-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/r/202609191635.PJEhAHNl-lkp@intel.com/ All warnings (new ones prefixed by >>): >> arch/x86/kernel/static_call.c:19:17: warning: 'tramp_ud' defined but not used [-Wunused-const-variable=] 19 | static const u8 tramp_ud[] = { 0x0f, 0xb9, 0xcc }; | ^~~~~~~~ vim +/tramp_ud +19 arch/x86/kernel/static_call.c 452cddbff74b6a Peter Zijlstra 2020-08-18 13 7723edf5edfdfd Peter Zijlstra 2022-06-14 14 /* 7723edf5edfdfd Peter Zijlstra 2022-06-14 15 * ud1 %esp, %ecx - a 3 byte #UD that is unique to trampolines, chosen such 7723edf5edfdfd Peter Zijlstra 2022-06-14 16 * that there is no false-positive trampoline identification while also being a 7723edf5edfdfd Peter Zijlstra 2022-06-14 17 * speculation stop. 7723edf5edfdfd Peter Zijlstra 2022-06-14 18 */ 7723edf5edfdfd Peter Zijlstra 2022-06-14 @19 static const u8 tramp_ud[] = { 0x0f, 0xb9, 0xcc }; 7723edf5edfdfd Peter Zijlstra 2022-06-14 20 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki