Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753648AbZKNGee (ORCPT ); Sat, 14 Nov 2009 01:34:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753140AbZKNGec (ORCPT ); Sat, 14 Nov 2009 01:34:32 -0500 Received: from mail-pw0-f42.google.com ([209.85.160.42]:42859 "EHLO mail-pw0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752678AbZKNGea (ORCPT ); Sat, 14 Nov 2009 01:34:30 -0500 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=IR5lzP7kI69ajxU2ypIleRS1njVvNe+dIXKubaJfS1tHCcrVHWWwPVLMUwUfkCNqkD XB2XyS6DJKS9zo2x8Byd3aziAwxK9nc4Re79p2mYW5+hStnY5rdLUTTOwLnWEqYRG5m4 Ki3x39Jg00qVus84xKqFQv62FrjbIFZOhlVaY= From: Wu Zhangjin To: rostedt@goodmis.org, Ralf Baechle Cc: Wu Zhangjin , Frederic Weisbecker , Ingo Molnar , Nicholas Mc Guire , David Daney , Richard Sandiford , Patrik Kluba , Thomas Gleixner , Michal Simek , "Maciej W . Rozycki" , linux-mips@linux-mips.org, linux-kernel@vger.kernel.org, zhangfx@lemote.com, zhouqg@gmail.com Subject: [PATCH v8 05/16] tracing: enable HAVE_FUNCTION_TRACE_MCOUNT_TEST for MIPS Date: Sat, 14 Nov 2009 14:33:20 +0800 Message-Id: <7c7568247ad6cc109ec20387cfc3ca258d1d430f.1258177321.git.wuzhangjin@gmail.com> X-Mailer: git-send-email 1.6.2.1 In-Reply-To: References: <9dc81a7a9e5a292cccdf465c533a2b08d19d6021.1258177321.git.wuzhangjin@gmail.com> <8f579e2cece16cd22358a4ec143ef6a8c462639b.1258177321.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 Content-Length: 1557 Lines: 50 From: Wu Zhangjin 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 | 3 +++ 2 files changed, 4 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 cebcc3c..cbb45ed 100644 --- a/arch/mips/kernel/mcount.S +++ b/arch/mips/kernel/mcount.S @@ -59,6 +59,9 @@ .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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/