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 397C4C072A2 for ; Fri, 17 Nov 2023 18:53:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231562AbjKQSxC (ORCPT ); Fri, 17 Nov 2023 13:53:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34816 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229535AbjKQSxA (ORCPT ); Fri, 17 Nov 2023 13:53:00 -0500 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D141D90 for ; Fri, 17 Nov 2023 10:52:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1700247176; x=1731783176; h=date:from:to:cc:subject:message-id:mime-version; bh=eAtpTQ3wMl0uO+JUbnTPU9wK1M2iiRCqPZrPjmYZfAY=; b=E9ulgZNUr1S+7OoG16bzwWlOyYQxhr9T78eEoj9veRZTdG9aR7khjCEI IXw3a9ZPjlgKlMVcTt8AjTV+h5aM30+XeB300/her9OMxM8+vJGUfFLdG 4Qicr1J+IVTsNUKT25ihm4egiPgBIMwRv5Xk5tYSIe3PhA/X4Lk2eFO0L 4akO9s6WNbPqQVat/OXAXpg8LpFKJjJVhEhTlelNAYz/nZbG5gMWSKY0E mx/Z1OoKP0vGhHhlW0JlRT1/yweJXu+xDq+vebrJ8t9eK2RL4oIK0X5H/ DCiowaJq+JYUZH1Ymep6+HlL2kZeAteglgxK9YseZUbxCmAd0OciaXPjM g==; X-IronPort-AV: E=McAfee;i="6600,9927,10897"; a="422444917" X-IronPort-AV: E=Sophos;i="6.04,206,1695711600"; d="scan'208";a="422444917" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Nov 2023 10:52:56 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.04,206,1695711600"; d="scan'208";a="6928611" Received: from lkp-server02.sh.intel.com (HELO b8de5498638e) ([10.239.97.151]) by orviesa002.jf.intel.com with ESMTP; 17 Nov 2023 10:52:55 -0800 Received: from kbuild by b8de5498638e with local (Exim 4.96) (envelope-from ) id 1r43xU-00032x-2J; Fri, 17 Nov 2023 18:52:52 +0000 Date: Sat, 18 Nov 2023 02:52:32 +0800 From: kernel test robot To: Jens Axboe Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org Subject: fs/splice.c:53:19: sparse: sparse: cast from restricted fmode_t Message-ID: <202311180228.sLGuM7AA-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 tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 6bc40e44f1ddef16a787f3501b97f1fff909177c commit: 0f99fc513ddd28de155c58547824a9fd63daacea splice: clear FMODE_NOWAIT on file if splice/vmsplice is used date: 7 months ago config: sparc-randconfig-r021-20230427 (https://download.01.org/0day-ci/archive/20231118/202311180228.sLGuM7AA-lkp@intel.com/config) compiler: sparc-linux-gcc (GCC) 12.3.0 reproduce: (https://download.01.org/0day-ci/archive/20231118/202311180228.sLGuM7AA-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/202311180228.sLGuM7AA-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) >> fs/splice.c:53:19: sparse: sparse: cast from restricted fmode_t >> fs/splice.c:53:19: sparse: sparse: cast from restricted fmode_t >> fs/splice.c:53:19: sparse: sparse: cast to restricted fmode_t fs/splice.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/xarray.h, ...): include/linux/page-flags.h:246:46: sparse: sparse: self-comparison always evaluates to false vim +53 fs/splice.c 39 40 /* 41 * Splice doesn't support FMODE_NOWAIT. Since pipes may set this flag to 42 * indicate they support non-blocking reads or writes, we must clear it 43 * here if set to avoid blocking other users of this pipe if splice is 44 * being done on it. 45 */ 46 static noinline void noinline pipe_clear_nowait(struct file *file) 47 { 48 fmode_t fmode = READ_ONCE(file->f_mode); 49 50 do { 51 if (!(fmode & FMODE_NOWAIT)) 52 break; > 53 } while (!try_cmpxchg(&file->f_mode, &fmode, fmode & ~FMODE_NOWAIT)); 54 } 55 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki