From patchwork Mon Nov 27 21:34:14 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andi Kleen X-Patchwork-Id: 10078245 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 6E864602BD for ; Mon, 27 Nov 2017 21:40:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5E90229081 for ; Mon, 27 Nov 2017 21:40:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 523AA2908F; Mon, 27 Nov 2017 21:40:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C6C5029081 for ; Mon, 27 Nov 2017 21:40:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753038AbdK0VkV (ORCPT ); Mon, 27 Nov 2017 16:40:21 -0500 Received: from mga09.intel.com ([134.134.136.24]:35216 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752259AbdK0Veb (ORCPT ); Mon, 27 Nov 2017 16:34:31 -0500 Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 27 Nov 2017 13:34:30 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.44,465,1505804400"; d="scan'208";a="153793270" Received: from tassilo.jf.intel.com (HELO tassilo.localdomain) ([10.7.201.35]) by orsmga004.jf.intel.com with ESMTP; 27 Nov 2017 13:34:30 -0800 Received: by tassilo.localdomain (Postfix, from userid 1000) id 97BD03010A1; Mon, 27 Nov 2017 13:34:29 -0800 (PST) From: Andi Kleen To: linux-kernel@vger.kernel.org Cc: x86@kernel.org, samitolvanen@google.com, alxmtvv@gmail.com, linux-kbuild@vger.kernel.org, yamada.masahiro@socionext.com, akpm@linux-foundation.org, Andi Kleen Subject: [PATCH 12/21] ftrace: Mark function tracer test functions noinline/noclone Date: Mon, 27 Nov 2017 13:34:14 -0800 Message-Id: <20171127213423.27218-13-andi@firstfloor.org> X-Mailer: git-send-email 2.13.6 In-Reply-To: <20171127213423.27218-1-andi@firstfloor.org> References: <20171127213423.27218-1-andi@firstfloor.org> Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Andi Kleen The ftrace function tracer self tests calls some functions to verify the get traced. This relies on them not being inlined. Previously this was ensured by putting them into another file, but with LTO the compiler can inline across files, which makes the tests fail. Mark these functions as noinline and noclone. Signed-off-by: Andi Kleen --- kernel/trace/trace_selftest_dynamic.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/kernel/trace/trace_selftest_dynamic.c b/kernel/trace/trace_selftest_dynamic.c index 8cda06a10d66..c364cf777e1a 100644 --- a/kernel/trace/trace_selftest_dynamic.c +++ b/kernel/trace/trace_selftest_dynamic.c @@ -1,13 +1,14 @@ // SPDX-License-Identifier: GPL-2.0 +#include #include "trace.h" -int DYN_FTRACE_TEST_NAME(void) +noinline __noclone int DYN_FTRACE_TEST_NAME(void) { /* used to call mcount */ return 0; } -int DYN_FTRACE_TEST_NAME2(void) +noinline __noclone int DYN_FTRACE_TEST_NAME2(void) { /* used to call mcount */ return 0;