From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752836AbZJZPOk (ORCPT ); Mon, 26 Oct 2009 11:14:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752691AbZJZPOj (ORCPT ); Mon, 26 Oct 2009 11:14:39 -0400 Received: from mail-qy0-f174.google.com ([209.85.221.174]:45568 "EHLO mail-qy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752651AbZJZPOh (ORCPT ); Mon, 26 Oct 2009 11:14:37 -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=aEDpHrnzSfwDMwJ7zoACaJLYUNnEkbk10TQRVb0kcAFrPHMXlgriJJBIpz6uFKs+Gz Tc/ckdMaIMrrbNkMiZZP9JKVr4KxiBVMC4dkjYD6c+aD8UcFSmfmBs70j6y8jSk1ujyj JV8oGBiZJmBruOCxYUkA0Cz+9UpjjtKL/bgT4= From: Wu Zhangjin To: linux-mips@linux-mips.org, linux-kernel@vger.kernel.org Cc: Wu Zhangjin , Frederic Weisbecker , rostedt@goodmis.org, Thomas Gleixner , Ralf Baechle , Richard Sandiford , Nicholas Mc Guire , David Daney , Adam Nemet , Patrik Kluba Subject: [PATCH -v6 05/13] tracing: enable HAVE_FUNCTION_TRACE_MCOUNT_TEST for MIPS Date: Mon, 26 Oct 2009 23:13:22 +0800 Message-Id: <374da7039d2e1b97083edd8bcd7811356884d427.1256569489.git.wuzhangjin@gmail.com> X-Mailer: git-send-email 1.6.2.1 In-Reply-To: <07dc907ec62353b1aca99b2850d3b2e4b734189a.1256569489.git.wuzhangjin@gmail.com> References: <747deea2f18d5ccffe842df95a9dd1c86251a958.1256569489.git.wuzhangjin@gmail.com> <3f47087b70a965fd679b17a59521671296457df1.1256569489.git.wuzhangjin@gmail.com> <07dc907ec62353b1aca99b2850d3b2e4b734189a.1256569489.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