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=-10.0 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,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 9A959C06511 for ; Tue, 2 Jul 2019 08:05:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6A3CB21852 for ; Tue, 2 Jul 2019 08:05:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562054749; bh=7RaYogAMaffMqsV7Hx9/3pdVa+O2RtBwSE/a+ve2qWw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=v77SHk7GJWml4Hwc0qqMKNH2CjgwtmbCLxKI/srxKL+H85/Z50ysxiG6lMMQtdhRu pC1DxP8FPuS3wyVGS0i4YK6UWSQDBKlDZqt9Q0rB7k/DH/sWcx+dAPw9gI8OPOc4d+ djpeR3j1THomrlXOUYSFdQ+QzvaP0vY6UyBL0lho= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728000AbfGBIFq (ORCPT ); Tue, 2 Jul 2019 04:05:46 -0400 Received: from mail.kernel.org ([198.145.29.99]:52016 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727965AbfGBIFq (ORCPT ); Tue, 2 Jul 2019 04:05:46 -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 DB62F2183F; Tue, 2 Jul 2019 08:05:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562054745; bh=7RaYogAMaffMqsV7Hx9/3pdVa+O2RtBwSE/a+ve2qWw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RMHXHEyjl8DsKQeEREANlhGFKfx7LK+81Zysj0a4+ykLIlRtyDk0HwKZ4/v4o4i/3 8UeIT60MyaOLBdMbA4yGFP0kB4x8sSGDAqwxaSOsyRGRMUh1BAkeeP92jKhDZhQvHs P/xT9iVm3E0k/xVjrO0IzVUno2IVATLxpwWXqY24= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sasha Levin Subject: [PATCH 4.19 05/72] Revert "x86/uaccess, ftrace: Fix ftrace_likely_update() vs. SMAP" Date: Tue, 2 Jul 2019 10:01:06 +0200 Message-Id: <20190702080124.848495406@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190702080124.564652899@linuxfoundation.org> References: <20190702080124.564652899@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org This reverts commit 1a3188d737ceb922166d8fe78a5fc4f89907e31b, which was upstream commit 4a6c91fbdef846ec7250b82f2eeeb87ac5f18cf9. On Tue, Jun 25, 2019 at 09:39:45AM +0200, Sebastian Andrzej Siewior wrote: >Please backport commit e74deb11931ff682b59d5b9d387f7115f689698e to >stable _or_ revert the backport of commit 4a6c91fbdef84 ("x86/uaccess, >ftrace: Fix ftrace_likely_update() vs. SMAP"). It uses >user_access_{save|restore}() which has been introduced in the following >commit. Signed-off-by: Sasha Levin --- kernel/trace/trace_branch.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c index 3ea65cdff30d..4ad967453b6f 100644 --- a/kernel/trace/trace_branch.c +++ b/kernel/trace/trace_branch.c @@ -205,8 +205,6 @@ void trace_likely_condition(struct ftrace_likely_data *f, int val, int expect) void ftrace_likely_update(struct ftrace_likely_data *f, int val, int expect, int is_constant) { - unsigned long flags = user_access_save(); - /* A constant is always correct */ if (is_constant) { f->constant++; @@ -225,8 +223,6 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val, f->data.correct++; else f->data.incorrect++; - - user_access_restore(flags); } EXPORT_SYMBOL(ftrace_likely_update); -- 2.20.1