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=-12.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 34A2EC2D0E0 for ; Sat, 12 Sep 2020 05:46:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E970E2078B for ; Sat, 12 Sep 2020 05:46:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="qYbXJe5u" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725847AbgILFhj (ORCPT ); Sat, 12 Sep 2020 01:37:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52452 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725801AbgILFhe (ORCPT ); Sat, 12 Sep 2020 01:37:34 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CA7EFC061573 for ; Fri, 11 Sep 2020 22:37:33 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id x10so11001270ybj.19 for ; Fri, 11 Sep 2020 22:37:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:message-id:mime-version:subject:from:to:cc; bh=IzEAqsDDn5rXz1ixs09fPDPhKK47SPxCXjigiPSAcAM=; b=qYbXJe5uG2SoGqbfJaDZ7O2YNLK6DQbJHIYaV8oyHdxcOXj2XcIw92uIxg5Cl8x/+n nAssu7L83NN/6NV64UnDwF1yhho1hqMhHrBXB+90+D/IWeOisrfjSjHSVvCY6yOjUlLO jF6vpdmA8oCQV+35xHgoCEbQhXRp11vnZUv7Gpz71sQNj+umA3VuEw68tjYsDxToxGRR Z8Eb9h5OlV/CZaEs30J3UDbSYo9c/1c8OsQzYzeO3VkASsda+dlpupvaoGxwh0wP/Syr KToVkShjuEhu2N8l0tTEWPL8tfduThjkueAKrAB1Kwio7LYF1R7zS8K5DrBg/Xctihv7 0asQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:message-id:mime-version:subject:from :to:cc; bh=IzEAqsDDn5rXz1ixs09fPDPhKK47SPxCXjigiPSAcAM=; b=JJcsVb0QUm6mlrgw4P9pklNcpGcil2sGrMsVWCMYugSn7oq220FNJukmNvRz6MMiIj MJ9pc/vvd3YSiGhi7qcurLW2ElY1AzdgoTqDIdeySLFZoTyPwj246+CErx0GhBvTFkzm OA7MWvW2KSuLJgH7Qu+WrStNXOeKcRYl0K85uBco1J2X5U8MjARRSDmjR7Rs+6jOglv0 rlX+6Z17/Z4QfOd/AwI0kgL4Fx6sXlgf+SnUXLMvBbbvkSx6WgHgWffD8bAVOzCjLRsQ boIa9645wgjW8/6xTAPRsLHIf+sgBx5VOiDXwRD5GXBlogYMYzphJQ3Zh0olAEJos+IZ G2nw== X-Gm-Message-State: AOAM53354DlKByI97s2C31NFI5DxPeRIOxcZondbQ4SSGntjtFzxDTCz WGYr2bE2ZcaMj4Y0JWhtK36OI7JPDEuo X-Google-Smtp-Source: ABdhPJx4OjnsCmz/CCNYqPCe/IM3s6/SKrc6qCYpww46Iu2G3WgO31mRgD/dxPg41xASaSMtf2bcAfxfzrig X-Received: from irogers.svl.corp.google.com ([2620:15c:2cd:2:f693:9fff:fef4:4583]) (user=irogers job=sendgmr) by 2002:a25:8404:: with SMTP id u4mr7376373ybk.176.1599889048784; Fri, 11 Sep 2020 22:37:28 -0700 (PDT) Date: Fri, 11 Sep 2020 22:37:25 -0700 Message-Id: <20200912053725.1405857-1-irogers@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.28.0.618.gf4bc123cb7-goog Subject: [PATCH] perf bench: Fix 2 memory sanitizer warnings From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , linux-kernel@vger.kernel.org Cc: Stephane Eranian , Ian Rogers Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Memory sanitizer warns if a write is performed where the memory being read for the write is uninitialized. Avoid this warning by initializing the memory. Signed-off-by: Ian Rogers --- tools/perf/bench/sched-messaging.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/perf/bench/sched-messaging.c b/tools/perf/bench/sched-messaging.c index 71d830d7b923..cecce93ccc63 100644 --- a/tools/perf/bench/sched-messaging.c +++ b/tools/perf/bench/sched-messaging.c @@ -66,11 +66,10 @@ static void fdpair(int fds[2]) /* Block until we're ready to go */ static void ready(int ready_out, int wakefd) { - char dummy; struct pollfd pollfd = { .fd = wakefd, .events = POLLIN }; /* Tell them we're ready. */ - if (write(ready_out, &dummy, 1) != 1) + if (write(ready_out, "R", 1) != 1) err(EXIT_FAILURE, "CLIENT: ready write"); /* Wait for "GO" signal */ @@ -85,6 +84,7 @@ static void *sender(struct sender_context *ctx) unsigned int i, j; ready(ctx->ready_out, ctx->wakefd); + memset(data, 'S', sizeof(data)); /* Now pump to every receiver. */ for (i = 0; i < nr_loops; i++) { -- 2.28.0.618.gf4bc123cb7-goog