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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 7B3D5C76186 for ; Mon, 29 Jul 2019 19:53:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4A9CF217D4 for ; Mon, 29 Jul 2019 19:53:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564430002; bh=AdRfg07wYRZs/1CXoKUxgRtQxKpsPAOTu12g9s8NZcA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=pffZhenYl4KtwUjZmr5na/OrFqChSoPAkwHgNk2NiJ6S1+0Bo2Igk/Jbk9HHmXtuB ZdpHh3Ip+u15+p8NeYJdX37aD/P6BhifgBZwmS4cQ9Kx1e9o67Mx+BSaEm/PLxo4jN maS47vDcGr+wpvHHxSzLGEFr+NR2DHo1totl7qTM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390887AbfG2TxU (ORCPT ); Mon, 29 Jul 2019 15:53:20 -0400 Received: from mail.kernel.org ([198.145.29.99]:44904 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403809AbfG2Tw6 (ORCPT ); Mon, 29 Jul 2019 15:52:58 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id BBB4B21773; Mon, 29 Jul 2019 19:52:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564429977; bh=AdRfg07wYRZs/1CXoKUxgRtQxKpsPAOTu12g9s8NZcA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=m8k5+i4FkLIxI66kTEQiLfhb7w0c/wWu/ytGdDHDt71rhwG6Xo8npTdOeuUNm9ejb RnSS2mVoNw56pLHvoiZ/euWgl/49LTWQ3kitGpXkdE5NsPlb4SNnc/6PDpSXxk+mEo QG36imUx619/1aKEGT4NuxLy3MUXwc1YDTLBEVF4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Numfor Mbiziwo-Tiapo , Alexander Shishkin , Ian Rogers , Jiri Olsa , Mark Drayton , Namhyung Kim , Peter Zijlstra , Song Liu , Stephane Eranian , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH 5.2 119/215] perf test mmap-thread-lookup: Initialize variable to suppress memory sanitizer warning Date: Mon, 29 Jul 2019 21:21:55 +0200 Message-Id: <20190729190759.712792229@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190729190739.971253303@linuxfoundation.org> References: <20190729190739.971253303@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [ Upstream commit 4e4cf62b37da5ff45c904a3acf242ab29ed5881d ] Running the 'perf test' command after building perf with a memory sanitizer causes a warning that says: WARNING: MemorySanitizer: use-of-uninitialized-value... in mmap-thread-lookup.c Initializing the go variable to 0 silences this harmless warning. Committer warning: This was harmless, just a simple test writing whatever was at that sizeof(int) memory area just to signal another thread blocked reading that file created with pipe(). Initialize it tho so that we don't get this warning. Signed-off-by: Numfor Mbiziwo-Tiapo Cc: Alexander Shishkin Cc: Ian Rogers Cc: Jiri Olsa Cc: Mark Drayton Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Song Liu Cc: Stephane Eranian Link: http://lkml.kernel.org/r/20190702173716.181223-1-nums@google.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/tests/mmap-thread-lookup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/tests/mmap-thread-lookup.c b/tools/perf/tests/mmap-thread-lookup.c index ba87e6e8d18c..0a4301a5155c 100644 --- a/tools/perf/tests/mmap-thread-lookup.c +++ b/tools/perf/tests/mmap-thread-lookup.c @@ -53,7 +53,7 @@ static void *thread_fn(void *arg) { struct thread_data *td = arg; ssize_t ret; - int go; + int go = 0; if (thread_init(td)) return NULL; -- 2.20.1