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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS 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 1194FC433EF for ; Sun, 19 Sep 2021 18:28:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E696C610EA for ; Sun, 19 Sep 2021 18:28:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231366AbhISS3j (ORCPT ); Sun, 19 Sep 2021 14:29:39 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:37698 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231217AbhISS3f (ORCPT ); Sun, 19 Sep 2021 14:29:35 -0400 From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1632076089; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=2KYUazECIPvhMA6qgZL1vhKItWC+1Q+3MI69AJhSdp0=; b=AvxfHfShGKasW4gMIEZgFRhGnqiIBOL/e35Hf8OUivzAglGntV2G0OTHdWCT1pfMahi8Do yWPTMZLHdUOwUCzw3RkVyCxbqabzW/tPpwvHhTKuEZGPr1bs4LQCwdZcEJi10ayDnUZ69i wmFeEp7iNHpa4Y/PtHhiPH1T0TbKrmhTZHQwX93mN84DMl+xKaOikFlsVOxXX8zOspn+yO gW0Vm/AqwUfD33TzSNt4ZW8PrzsytbKhXfBqPnVfNBcLAA4noKoKJ5vj2iymPixNctvxVT J8u7GzCy23V7BB5qbgXNDuWQgUeME00wXn/uJbjKTfUNrR3Z/5q/V+0UZmQC5w== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1632076089; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=2KYUazECIPvhMA6qgZL1vhKItWC+1Q+3MI69AJhSdp0=; b=DvgJXsZKdh0Bo7YXIFPXBe1TZcMV8218HE6LjdzCpjUzryJF7q/0Czb2I/aQpW5LDoopAi dkYqq8PqM1KcXlCA== To: Linus Torvalds Cc: linux-kernel@vger.kernel.org, x86@kernel.org Subject: [GIT pull] perf/urgent for v5.15-rc2 References: <163207602242.947088.16824174748243890514.tglx@xen13> Message-ID: <163207602394.947088.16084244161007584223.tglx@xen13> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Date: Sun, 19 Sep 2021 20:28:09 +0200 (CEST) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Linus, please pull the latest perf/urgent branch from: git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf-urgent-2021= -09-19 up to: b89a05b21f46: events: Reuse value read using READ_ONCE instead of re-= reading it A single fix for the perf core where a value read with READ_ONCE() was checked and then reread which makes all the checks invalid. Reuse the already read value instead. Thanks, tglx ------------------> Baptiste Lepers (1): events: Reuse value read using READ_ONCE instead of re-reading it kernel/events/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/events/core.c b/kernel/events/core.c index 744e8726c5b2..0c000cb01eeb 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -10193,7 +10193,7 @@ static void perf_event_addr_filters_apply(struct perf= _event *event) return; =20 if (ifh->nr_file_filters) { - mm =3D get_task_mm(event->ctx->task); + mm =3D get_task_mm(task); if (!mm) goto restart; =20