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X-CSE-ConnectionGUID: mOciJhoIQo2SDQnV4J7EEQ== X-CSE-MsgGUID: 68vCE72sTF+gex+P8OKGTg== X-IronPort-AV: E=McAfee;i="6800,10657,11755"; a="76626051" X-IronPort-AV: E=Sophos;i="6.23,173,1770624000"; d="scan'208";a="76626051" Received: from fmviesa005.fm.intel.com ([10.60.135.145]) by orvoesa112.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Apr 2026 04:36:20 -0700 X-CSE-ConnectionGUID: 2dzaLPxZR0CmqYAad4KcYQ== X-CSE-MsgGUID: A8Bed5hTQmiAzSROkQYSPQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,173,1770624000"; d="scan'208";a="234262013" Received: from igk-lkp-server01.igk.intel.com (HELO 9958d990ccf2) ([10.211.93.152]) by fmviesa005.fm.intel.com with ESMTP; 11 Apr 2026 04:36:19 -0700 Received: from kbuild by 9958d990ccf2 with local (Exim 4.98.2) (envelope-from ) id 1wBWdM-00000000B4H-3Hd7; Sat, 11 Apr 2026 11:36:16 +0000 Date: Sat, 11 Apr 2026 13:35:35 +0200 From: kernel test robot To: Eduard Zingerman Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, 0day robot Subject: kernel/bpf/liveness.c:371:34: warning: variable 'cnt' set but not used Message-ID: <202604111314.SCpV3BPU-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: tree: https://github.com/intel-lab-lkp/linux/commits/Eduard-Zingerman/bpf-share-several-utility-functions-as-internal-API/20260411-114028 head: ad9095e5b6b2e04ae837fa578308a4f7f48fb24e commit: dc02669dbcd7fae4c4ec1cbcf98f86002d462772 bpf: change logging scheme for live stack analysis date: 8 hours ago config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260411/202604111314.SCpV3BPU-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/20260411/202604111314.SCpV3BPU-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/202604111314.SCpV3BPU-lkp@intel.com/ All warnings (new ones prefixed by >>): >> kernel/bpf/liveness.c:371:34: warning: variable 'cnt' set but not used [-Wunused-but-set-variable] 371 | u32 i, frame, po_start, po_end, cnt; | ^ 1 warning generated. vim +/cnt +371 kernel/bpf/liveness.c b3698c356ad92b Eduard Zingerman 2025-09-18 367 5c742328a727cd Eduard Zingerman 2026-04-10 368 /* Fixed-point computation of @live_before marks */ 5c742328a727cd Eduard Zingerman 2026-04-10 369 static void update_instance(struct bpf_verifier_env *env, struct func_instance *instance) b3698c356ad92b Eduard Zingerman 2025-09-18 370 { 5c742328a727cd Eduard Zingerman 2026-04-10 @371 u32 i, frame, po_start, po_end, cnt; b3698c356ad92b Eduard Zingerman 2025-09-18 372 int *insn_postorder = env->cfg.insn_postorder; b3698c356ad92b Eduard Zingerman 2025-09-18 373 struct bpf_subprog_info *subprog; b3698c356ad92b Eduard Zingerman 2025-09-18 374 bool changed; b3698c356ad92b Eduard Zingerman 2025-09-18 375 5c742328a727cd Eduard Zingerman 2026-04-10 376 instance->must_write_initialized = true; 5c742328a727cd Eduard Zingerman 2026-04-10 377 subprog = &env->subprog_info[instance->subprog]; b3698c356ad92b Eduard Zingerman 2025-09-18 378 po_start = subprog->postorder_start; b3698c356ad92b Eduard Zingerman 2025-09-18 379 po_end = (subprog + 1)->postorder_start; b3698c356ad92b Eduard Zingerman 2025-09-18 380 cnt = 0; b3698c356ad92b Eduard Zingerman 2025-09-18 381 /* repeat until fixed point is reached */ b3698c356ad92b Eduard Zingerman 2025-09-18 382 do { b3698c356ad92b Eduard Zingerman 2025-09-18 383 cnt++; b3698c356ad92b Eduard Zingerman 2025-09-18 384 changed = false; 5c742328a727cd Eduard Zingerman 2026-04-10 385 for (frame = 0; frame <= instance->depth; frame++) { b3698c356ad92b Eduard Zingerman 2025-09-18 386 if (!instance->frames[frame]) b3698c356ad92b Eduard Zingerman 2025-09-18 387 continue; b3698c356ad92b Eduard Zingerman 2025-09-18 388 b3698c356ad92b Eduard Zingerman 2025-09-18 389 for (i = po_start; i < po_end; i++) b3698c356ad92b Eduard Zingerman 2025-09-18 390 changed |= update_insn(env, instance, frame, insn_postorder[i]); b3698c356ad92b Eduard Zingerman 2025-09-18 391 } b3698c356ad92b Eduard Zingerman 2025-09-18 392 } while (changed); b3698c356ad92b Eduard Zingerman 2025-09-18 393 } b3698c356ad92b Eduard Zingerman 2025-09-18 394 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki