From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752774AbZJYPRu (ORCPT ); Sun, 25 Oct 2009 11:17:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752597AbZJYPRt (ORCPT ); Sun, 25 Oct 2009 11:17:49 -0400 Received: from mail-pz0-f171.google.com ([209.85.222.171]:50689 "EHLO mail-pz0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752230AbZJYPRr (ORCPT ); Sun, 25 Oct 2009 11:17:47 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; b=SGaYcg4CGVEm1lzWtXNkMvSKTGVRXjPvA5S5d8SFhARM7K2shV9bsAQEJrzt5kvSHM Th1RNZCMc46RCROyjEKwak7JR6fHIwu57ZJWXTsl9354ix+nQ4ITvneG6yC/bgiwtKrv cR/tkvLf7OfCVirjCJdHdp7wnzl8R2zEuoaqg= From: Wu Zhangjin To: linux-mips@linux-mips.org, linux-kernel@vger.kernel.org Cc: Wu Zhangjin , rostedt@goodmis.org, Thomas Gleixner , Ralf Baechle , Nicholas Mc Guire , Richard Sandiford , David Daney , Adam Nemet , Patrik Kluba Subject: [PATCH -v5 05/11] tracing: enable HAVE_FUNCTION_TRACE_MCOUNT_TEST for MIPS Date: Sun, 25 Oct 2009 23:16:56 +0800 Message-Id: <29bccff04932e993ecd9f516d8b6dcf84e2ceecf.1256483735.git.wuzhangjin@gmail.com> X-Mailer: git-send-email 1.6.2.1 In-Reply-To: <54c417629e91f40b2bbb4e08cda2a4e6527824c0.1256483735.git.wuzhangjin@gmail.com> References: <028867b99ec532b84963a35e7d552becc783cafc.1256483735.git.wuzhangjin@gmail.com> <2f73eae542c47ac5bbb9f7280e6c0271d193e90d.1256483735.git.wuzhangjin@gmail.com> <3e0c2d7d8b8f196a8153beb41ea7f3cbf42b3d84.1256483735.git.wuzhangjin@gmail.com> <54c417629e91f40b2bbb4e08cda2a4e6527824c0.1256483735.git.wuzhangjin@gmail.com> In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There is an exisiting common ftrace_test_stop_func() in kernel/trace/ftrace.c, which is used to check the global variable ftrace_trace_stop to determine whether stop the function tracing. This patch implepment the MIPS specific one to speedup the procedure. Thanks goes to Zhang Le for Cleaning it up. Signed-off-by: Wu Zhangjin --- arch/mips/Kconfig | 1 + arch/mips/kernel/mcount.S | 4 ++++ 2 files changed, 5 insertions(+), 0 deletions(-) diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 6b33e88..a9bd992 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -5,6 +5,7 @@ config MIPS select HAVE_OPROFILE select HAVE_ARCH_KGDB select HAVE_FUNCTION_TRACER + select HAVE_FUNCTION_TRACE_MCOUNT_TEST # Horrible source of confusion. Die, die, die ... select EMBEDDED select RTC_LIB if !LEMOTE_FULOONG2E diff --git a/arch/mips/kernel/mcount.S b/arch/mips/kernel/mcount.S index 0c39bc8..5dfaca8 100644 --- a/arch/mips/kernel/mcount.S +++ b/arch/mips/kernel/mcount.S @@ -64,6 +64,10 @@ .endm NESTED(_mcount, PT_SIZE, ra) + lw t0, function_trace_stop + bnez t0, ftrace_stub + nop + PTR_LA t0, ftrace_stub PTR_L t1, ftrace_trace_function /* Prepare t1 for (1) */ bne t0, t1, static_trace -- 1.6.2.1