From patchwork Tue Oct 20 23:51:09 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fenghua Yu X-Patchwork-Id: 285871 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7976C4363D for ; Tue, 20 Oct 2020 23:52:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 67B5221D6C for ; Tue, 20 Oct 2020 23:52:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2410624AbgJTXwc (ORCPT ); Tue, 20 Oct 2020 19:52:32 -0400 Received: from mga04.intel.com ([192.55.52.120]:54960 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2410708AbgJTXvb (ORCPT ); Tue, 20 Oct 2020 19:51:31 -0400 IronPort-SDR: dR+1YH3fiTNCgxlJVZ4PU5uBysjLGtUvfNRaxDqrnaYabItjGXu6vaWHVBBooZ7CinxJHxHqxT NOZZ7oV+cRCA== X-IronPort-AV: E=McAfee;i="6000,8403,9780"; a="164686723" X-IronPort-AV: E=Sophos;i="5.77,399,1596524400"; d="scan'208";a="164686723" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Oct 2020 16:51:30 -0700 IronPort-SDR: JsBpaXDUtVVUTRdEYrIjdmzlvym7X67C1SI00YYXWVLCt+dsnom5T7CIWV1y8fmAv0x4U8EYKp 1sjr0WDc4EBw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,399,1596524400"; d="scan'208";a="320833823" Received: from otcwcpicx6.sc.intel.com ([172.25.55.29]) by orsmga006.jf.intel.com with ESMTP; 20 Oct 2020 16:51:29 -0700 From: Fenghua Yu To: "Shuah Khan" , "Reinette Chatre" , "Tony Luck" , "Babu Moger" , "James Morse" , "Borislav Petkov" , "Thomas Gleixner" , "Ravi V Shankar" Cc: "linux-kselftest" , "linux-kernel" , Fenghua Yu Subject: [PATCH v3 04/21] selftests/resctrl: Declare global variables as extern Date: Tue, 20 Oct 2020 23:51:09 +0000 Message-Id: <20201020235126.1871815-5-fenghua.yu@intel.com> X-Mailer: git-send-email 2.29.0 In-Reply-To: <20201020235126.1871815-1-fenghua.yu@intel.com> References: <20201020235126.1871815-1-fenghua.yu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org resctrl test suite uses global variables (E.g: bm_pid, ppid, llc_occup_path and is_amd) that are used across .c files. These global variables are defined in resctrl.h file and the header file is included in .c files where needed. Sparse tool isn't very happy about defining global variables in .h file and hence complains as below resctrl.h:65:7: warning: symbol 'bm_pid' was not declared. Should it be static? resctrl.h:65:15: warning: symbol 'ppid' was not declared. Should it be static? resctrl.h:66:5: warning: symbol 'tests_run' was not declared. Should it be static? resctrl.h:68:6: warning: symbol 'llc_occup_path' was not declared. Should it be static? resctrl.h:69:6: warning: symbol 'is_amd' was not declared. Should it be static? Sparse tool thinks that since the variables are defined and not declared, it assumes that the scope of these variables is limited to a .c file and hence suggests making them static variables. But these variables are used across .c files and hence cannot be static variables. Fix these warnings by declaring the variables (i.e. use extern keyword) rather than defining them in resctrl.h file. Please note that sparse tool still complains about other issues and they will be fixed in later patches. Fixes: 591a6e8588fc ("selftests/resctrl: Add basic resctrl file system operations and data") Reported-by: Reinette Chatre Signed-off-by: Fenghua Yu --- tools/testing/selftests/resctrl/resctrl.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h index 68522b19b235..814d0dd517a4 100644 --- a/tools/testing/selftests/resctrl/resctrl.h +++ b/tools/testing/selftests/resctrl/resctrl.h @@ -62,11 +62,11 @@ struct resctrl_val_param { int (*setup)(int num, ...); }; -pid_t bm_pid, ppid; -int tests_run; +extern pid_t bm_pid, ppid; +extern int tests_run; -char llc_occup_path[1024]; -bool is_amd; +extern char llc_occup_path[1024]; +extern bool is_amd; bool check_resctrlfs_support(void); int filter_dmesg(void);