From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753132AbZBHFxy (ORCPT ); Sun, 8 Feb 2009 00:53:54 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752091AbZBHFxn (ORCPT ); Sun, 8 Feb 2009 00:53:43 -0500 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.123]:35511 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751520AbZBHFxm (ORCPT ); Sun, 8 Feb 2009 00:53:42 -0500 Message-Id: <20090208055341.008385061@goodmis.org> References: <20090208054955.777429253@goodmis.org> User-Agent: quilt/0.46-1 Date: Sun, 08 Feb 2009 00:49:58 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , Thomas Gleixner , Peter Zijlstra , Arnaldo Carvalho de Melo , Frederic Weisbecker , Steven Rostedt Subject: [PATCH 3/8] ring-buffer: allow tracing_off to be used in core kernel code Content-Disposition: inline; filename=0003-ring-buffer-allow-tracing_off-to-be-used-in-core-ke.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Steven Rostedt tracing_off() is the fastest way to stop recording to the ring buffers. This may be used in places like panic and die, just before the ftrace_dump is called. This patch adds the appropriate CPP conditionals to make it a stub function when the ring buffer is not configured it. Signed-off-by: Steven Rostedt --- include/linux/ring_buffer.h | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-) diff --git a/include/linux/ring_buffer.h b/include/linux/ring_buffer.h index b3b3596..ac94c06 100644 --- a/include/linux/ring_buffer.h +++ b/include/linux/ring_buffer.h @@ -124,9 +124,18 @@ unsigned long ring_buffer_overrun_cpu(struct ring_buffer *buffer, int cpu); u64 ring_buffer_time_stamp(int cpu); void ring_buffer_normalize_time_stamp(int cpu, u64 *ts); +/* + * The below functions are fine to use outside the tracing facility. + */ +#ifdef CONFIG_RING_BUFFER void tracing_on(void); void tracing_off(void); void tracing_off_permanent(void); +#else +static inline void tracing_on(void) { } +static inline void tracing_off(void) { } +static inline void tracing_off_permanent(void) { } +#endif void *ring_buffer_alloc_read_page(struct ring_buffer *buffer); void ring_buffer_free_read_page(struct ring_buffer *buffer, void *data); -- 1.5.6.5 --