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=-3.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,T_DKIMWL_WL_HIGH,URIBL_BLOCKED, 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 1CDEDC6778F for ; Fri, 27 Jul 2018 12:45:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B99892064D for ; Fri, 27 Jul 2018 12:45:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="Ai57f1jY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B99892064D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730575AbeG0OGm (ORCPT ); Fri, 27 Jul 2018 10:06:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:39856 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730354AbeG0OGm (ORCPT ); Fri, 27 Jul 2018 10:06:42 -0400 Received: from localhost.localdomain (NE2965lan1.rev.em-net.ne.jp [210.141.244.193]) (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 A62CE2064D; Fri, 27 Jul 2018 12:44:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1532695494; bh=TFg/fek37xIEtgEmLqWj8GoNP9CE90ZH0mMMYgWNlwQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=Ai57f1jYbKidQqOH1hkD4fhmuPMWWApIaEkVkNm5mm/ABFtZ0UA5bBYgXVW0oi7o0 Klsolz1CZaf0NwYRz34OjUuYz6JWEdfsGcOExMp4Qj9UrVih03tzCWxHAHgtSYUlmk guXy0qfVRKw7ptcm1rQqcuGhTZwXo495c186mJYo= From: Masami Hiramatsu To: rostedt@goodmis.org, Francis Deslauriers , peterz@infradead.org Cc: mhiramat@kernel.org, mathieu.desnoyers@efficios.com, linux-kernel@vger.kernel.org Subject: [PATCH v2.1 2/3] selftest/ftrace: Move kprobe selftest function to separate compile unit Date: Fri, 27 Jul 2018 21:44:31 +0900 Message-Id: <153269547167.6594.13831042233865966958.stgit@devbox> X-Mailer: git-send-email 2.13.6 In-Reply-To: <20180726192943.2499a61d@gandalf.local.home> References: <20180726192943.2499a61d@gandalf.local.home> In-Reply-To: <20180726192943.2499a61d@gandalf.local.home> References: <20180726192943.2499a61d@gandalf.local.home> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Francis Deslauriers Move selftest function to its own compile unit so it can be compiled with the ftrace cflags (CC_FLAGS_FTRACE) allowing it to be probed during the ftrace startup tests. Signed-off-by: Francis Deslauriers Signed-off-by: Masami Hiramatsu --- kernel/trace/Makefile | 5 +++++ kernel/trace/trace_kprobe.c | 12 +----------- kernel/trace/trace_kprobe_selftest.c | 10 ++++++++++ kernel/trace/trace_kprobe_selftest.h | 7 +++++++ 4 files changed, 23 insertions(+), 11 deletions(-) create mode 100644 kernel/trace/trace_kprobe_selftest.c create mode 100644 kernel/trace/trace_kprobe_selftest.h diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile index e2538c7638d4..e38771eccb2f 100644 --- a/kernel/trace/Makefile +++ b/kernel/trace/Makefile @@ -13,6 +13,11 @@ obj-y += trace_selftest_dynamic.o endif endif +ifdef CONFIG_FTRACE_STARTUP_TEST +CFLAGS_trace_kprobe_selftest.o = $(CC_FLAGS_FTRACE) +obj-$(CONFIG_KPROBE_EVENTS) += trace_kprobe_selftest.o +endif + # If unlikely tracing is enabled, do not trace these files ifdef CONFIG_TRACING_BRANCHES KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index 1f1b4d712a7e..859f7c310a00 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -23,6 +23,7 @@ #include #include +#include "trace_kprobe_selftest.h" #include "trace_probe.h" #define KPROBE_EVENT_SYSTEM "kprobes" @@ -1573,17 +1574,6 @@ fs_initcall(init_kprobe_trace); #ifdef CONFIG_FTRACE_STARTUP_TEST -/* - * The "__used" keeps gcc from removing the function symbol - * from the kallsyms table. 'noinline' makes sure that there - * isn't an inlined version used by the test method below - */ -static __used __init noinline int -kprobe_trace_selftest_target(int a1, int a2, int a3, int a4, int a5, int a6) -{ - return a1 + a2 + a3 + a4 + a5 + a6; -} - static __init struct trace_event_file * find_trace_probe_file(struct trace_kprobe *tk, struct trace_array *tr) { diff --git a/kernel/trace/trace_kprobe_selftest.c b/kernel/trace/trace_kprobe_selftest.c new file mode 100644 index 000000000000..16548ee4c8c6 --- /dev/null +++ b/kernel/trace/trace_kprobe_selftest.c @@ -0,0 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Function used during the kprobe self test. This function is in a separate + * compile unit so it can be compile with CC_FLAGS_FTRACE to ensure that it + * can be probed by the selftests. + */ +int kprobe_trace_selftest_target(int a1, int a2, int a3, int a4, int a5, int a6) +{ + return a1 + a2 + a3 + a4 + a5 + a6; +} diff --git a/kernel/trace/trace_kprobe_selftest.h b/kernel/trace/trace_kprobe_selftest.h new file mode 100644 index 000000000000..4e10ec41c013 --- /dev/null +++ b/kernel/trace/trace_kprobe_selftest.h @@ -0,0 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Function used during the kprobe self test. This function is in a separate + * compile unit so it can be compile with CC_FLAGS_FTRACE to ensure that it + * can be probed by the selftests. + */ +int kprobe_trace_selftest_target(int a1, int a2, int a3, int a4, int a5, int a6);