From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755500AbZBQFQt (ORCPT ); Tue, 17 Feb 2009 00:16:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752740AbZBQFOR (ORCPT ); Tue, 17 Feb 2009 00:14:17 -0500 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.125]:33858 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751782AbZBQFOI (ORCPT ); Tue, 17 Feb 2009 00:14:08 -0500 Message-Id: <20090217051407.234082938@goodmis.org> References: <20090217051227.957864159@goodmis.org> User-Agent: quilt/0.46-1 Date: Tue, 17 Feb 2009 00:12:38 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , Peter Zijlstra , Frederic Weisbecker , Arnaldo Carvalho de Melo , Steven Rostedt Subject: [PATCH 11/15] ring-buffer: add tracing_is_on to test if ring buffer is enabled Content-Disposition: inline; filename=0011-ring-buffer-add-tracing_is_on-to-test-if-ring-buffe.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Steven Rostedt This patch adds the tracing_is_on() interface to tell if the ring buffer is turned on or not. Signed-off-by: Steven Rostedt --- include/linux/ring_buffer.h | 2 ++ kernel/trace/ring_buffer.c | 9 +++++++++ 2 files changed, 11 insertions(+), 0 deletions(-) diff --git a/include/linux/ring_buffer.h b/include/linux/ring_buffer.h index 8e6646a..f5e793d 100644 --- a/include/linux/ring_buffer.h +++ b/include/linux/ring_buffer.h @@ -128,10 +128,12 @@ void ring_buffer_normalize_time_stamp(int cpu, u64 *ts); void tracing_on(void); void tracing_off(void); void tracing_off_permanent(void); +int tracing_is_on(void); #else static inline void tracing_on(void) { } static inline void tracing_off(void) { } static inline void tracing_off_permanent(void) { } +static inline int tracing_is_on(void) { return 0; } #endif void *ring_buffer_alloc_read_page(struct ring_buffer *buffer); diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 2b4626c..8f19f1a 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -98,6 +98,15 @@ void tracing_off_permanent(void) set_bit(RB_BUFFERS_DISABLED_BIT, &ring_buffer_flags); } +/** + * tracing_is_on - show state of ring buffers enabled + */ +int tracing_is_on(void) +{ + return ring_buffer_flags == RB_BUFFERS_ON; +} +EXPORT_SYMBOL_GPL(tracing_is_on); + #include "trace.h" /* Up this if you want to test the TIME_EXTENTS and normalization */ -- 1.5.6.5 --