From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751930Ab3JTVH0 (ORCPT ); Sun, 20 Oct 2013 17:07:26 -0400 Received: from mga09.intel.com ([134.134.136.24]:47881 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751783Ab3JTVHZ (ORCPT ); Sun, 20 Oct 2013 17:07:25 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.93,534,1378882800"; d="scan'208";a="395837718" From: Andi Kleen To: mingo@kernel.org Cc: linux-kernel@vger.kernel.org, Andi Kleen , rostedt@goodmis.org, peterz@infradead.org Subject: [PATCH] perf: Allow ftracing perf code Date: Sun, 20 Oct 2013 14:07:16 -0700 Message-Id: <1382303236-23839-1-git-send-email-andi@firstfloor.org> X-Mailer: git-send-email 1.8.3.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andi Kleen According to Stephen there is no reason left not to allow function trace in perf code. Don't disable the function tracer instrumentation for the perf files. Changes the generic and the x86 files. I've been using variants of this patch for a long time and haven't seen any problems. It's really useful to figure out why a complex perf_event_open() syscall fails. Cc: rostedt@goodmis.org Cc: peterz@infradead.org Signed-off-by: Andi Kleen --- arch/x86/kernel/cpu/Makefile | 1 - kernel/events/Makefile | 4 ---- 2 files changed, 5 deletions(-) diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile index 47b56a7..190bf4a 100644 --- a/arch/x86/kernel/cpu/Makefile +++ b/arch/x86/kernel/cpu/Makefile @@ -5,7 +5,6 @@ # Don't trace early stages of a secondary CPU boot ifdef CONFIG_FUNCTION_TRACER CFLAGS_REMOVE_common.o = -pg -CFLAGS_REMOVE_perf_event.o = -pg endif # Make sure load_percpu_segment has no stackprotector diff --git a/kernel/events/Makefile b/kernel/events/Makefile index 103f5d1..a630994 100644 --- a/kernel/events/Makefile +++ b/kernel/events/Makefile @@ -1,7 +1,3 @@ -ifdef CONFIG_FUNCTION_TRACER -CFLAGS_REMOVE_core.o = -pg -endif - obj-y := core.o ring_buffer.o callchain.o obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o -- 1.8.3.1