From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 58BAFC6FA8E for ; Thu, 2 Mar 2023 13:47:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230096AbjCBNrV (ORCPT ); Thu, 2 Mar 2023 08:47:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44248 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229480AbjCBNrT (ORCPT ); Thu, 2 Mar 2023 08:47:19 -0500 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0848130B24 for ; Thu, 2 Mar 2023 05:47:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1677764837; x=1709300837; h=date:from:to:cc:subject:message-id:mime-version; bh=74uO7+KfA34hp7SC7YFi68Y3Lewfq+9vwVsNne1TVTE=; b=E/y6m3nVdwbRzZwybATtovlz2IESkuxYl8X/32DGxEk10xgVqqN+DKlg 4qYDTSWeFooZYH4jR4I249iQncrbQst2I3mgAv1h+lF15vF6YZoNNGDNK EHwXT1Zo4qqVradOCghzBFMY2bQw0hEq6AJ8ZQjp36dwkVh2q29XrY8vS IF6I1lHKEaH/Y08gTdhd0qiiJB0Nwf9SXbp6zTuaOpMfts4ZucHw43HSd ZVMiZ+hVkRsW5xi4IjtuHg299pzlXkjYzwzli3iqO9jna+ZcnpC36IQ8A iV0Xu3NHbg3iaWcocz1KJmk6vlEPubCuDaax7MD0OSBfQWPOGr/mVC/pQ Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10636"; a="322996247" X-IronPort-AV: E=Sophos;i="5.98,227,1673942400"; d="scan'208";a="322996247" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Mar 2023 05:47:16 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10636"; a="705251418" X-IronPort-AV: E=Sophos;i="5.98,227,1673942400"; d="scan'208";a="705251418" Received: from lkp-server01.sh.intel.com (HELO 776573491cc5) ([10.239.97.150]) by orsmga008.jf.intel.com with ESMTP; 02 Mar 2023 05:47:15 -0800 Received: from kbuild by 776573491cc5 with local (Exim 4.96) (envelope-from ) id 1pXjH8-0000VE-1w; Thu, 02 Mar 2023 13:47:14 +0000 Date: Thu, 2 Mar 2023 21:46:59 +0800 From: kernel test robot To: Jens Axboe Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org Subject: io_uring/io_uring.c:2932:40: error: variable 'prev' set but not used Message-ID: <202303022133.y7FMQVJo-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Jens, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: ee3f96b164688dae21e2466a57f2e806b64e8a37 commit: ed29b0b4fd835b058ddd151c49d021e28d631ee6 io_uring: move to separate directory date: 7 months ago config: x86_64-sof-customedconfig-edison-defconfig (https://download.01.org/0day-ci/archive/20230302/202303022133.y7FMQVJo-lkp@intel.com/config) compiler: gcc-11 (Debian 11.3.0-8) 11.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ed29b0b4fd835b058ddd151c49d021e28d631ee6 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout ed29b0b4fd835b058ddd151c49d021e28d631ee6 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 olddefconfig make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot | Link: https://lore.kernel.org/oe-kbuild-all/202303022133.y7FMQVJo-lkp@intel.com/ All errors (new ones prefixed by >>): io_uring/io_uring.c: In function '__io_submit_flush_completions': >> io_uring/io_uring.c:2932:40: error: variable 'prev' set but not used [-Werror=unused-but-set-variable] 2932 | struct io_wq_work_node *node, *prev; | ^~~~ cc1: all warnings being treated as errors vim +/prev +2932 io_uring/io_uring.c 7a743e225b2a9d fs/io_uring.c Pavel Begunkov 2020-03-03 2928 c450178d9be9dc fs/io_uring.c Pavel Begunkov 2021-09-08 2929 static void __io_submit_flush_completions(struct io_ring_ctx *ctx) a141dd896f544d fs/io_uring.c Jens Axboe 2021-08-12 2930 __must_hold(&ctx->uring_lock) 905c172f32c56f fs/io_uring.c Pavel Begunkov 2021-02-10 2931 { 6f33b0bc4ea43f fs/io_uring.c Pavel Begunkov 2021-09-24 @2932 struct io_wq_work_node *node, *prev; cd0ca2e048dc0d fs/io_uring.c Pavel Begunkov 2021-08-09 2933 struct io_submit_state *state = &ctx->submit_state; 905c172f32c56f fs/io_uring.c Pavel Begunkov 2021-02-10 2934 3d4aeb9f98058c fs/io_uring.c Pavel Begunkov 2021-11-10 2935 if (state->flush_cqes) { 79ebeaee8a21a0 fs/io_uring.c Jens Axboe 2021-08-10 2936 spin_lock(&ctx->completion_lock); 6f33b0bc4ea43f fs/io_uring.c Pavel Begunkov 2021-09-24 2937 wq_list_for_each(node, prev, &state->compl_reqs) { 6f33b0bc4ea43f fs/io_uring.c Pavel Begunkov 2021-09-24 2938 struct io_kiocb *req = container_of(node, struct io_kiocb, 6f33b0bc4ea43f fs/io_uring.c Pavel Begunkov 2021-09-24 2939 comp_list); 5182ed2e332e8e fs/io_uring.c Pavel Begunkov 2021-06-26 2940 f43de1f88841d5 fs/io_uring.c Pavel Begunkov 2022-06-15 2941 if (!(req->flags & REQ_F_CQE_SKIP)) 91ef75a7db0d08 fs/io_uring.c Pavel Begunkov 2022-06-15 2942 __io_fill_cqe_req(ctx, req); 905c172f32c56f fs/io_uring.c Pavel Begunkov 2021-02-10 2943 } 3d4aeb9f98058c fs/io_uring.c Pavel Begunkov 2021-11-10 2944 905c172f32c56f fs/io_uring.c Pavel Begunkov 2021-02-10 2945 io_commit_cqring(ctx); 79ebeaee8a21a0 fs/io_uring.c Jens Axboe 2021-08-10 2946 spin_unlock(&ctx->completion_lock); 905c172f32c56f fs/io_uring.c Pavel Begunkov 2021-02-10 2947 io_cqring_ev_posted(ctx); 3d4aeb9f98058c fs/io_uring.c Pavel Begunkov 2021-11-10 2948 state->flush_cqes = false; 3d4aeb9f98058c fs/io_uring.c Pavel Begunkov 2021-11-10 2949 } 5182ed2e332e8e fs/io_uring.c Pavel Begunkov 2021-06-26 2950 1cce17aca621c3 fs/io_uring.c Pavel Begunkov 2021-09-24 2951 io_free_batch_list(ctx, state->compl_reqs.first); 6f33b0bc4ea43f fs/io_uring.c Pavel Begunkov 2021-09-24 2952 INIT_WQ_LIST(&state->compl_reqs); 7a743e225b2a9d fs/io_uring.c Pavel Begunkov 2020-03-03 2953 } 7a743e225b2a9d fs/io_uring.c Pavel Begunkov 2020-03-03 2954 :::::: The code at line 2932 was first introduced by commit :::::: 6f33b0bc4ea43f5c5ce7b7c9ab66051f80837862 io_uring: use slist for completion batching :::::: TO: Pavel Begunkov :::::: CC: Jens Axboe -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests