From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755838AbZCDCxK (ORCPT ); Tue, 3 Mar 2009 21:53:10 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753152AbZCDCwy (ORCPT ); Tue, 3 Mar 2009 21:52:54 -0500 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.123]:39964 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752648AbZCDCwx (ORCPT ); Tue, 3 Mar 2009 21:52:53 -0500 Message-Id: <20090304025250.164970857@goodmis.org> References: <20090304024921.153061228@goodmis.org> User-Agent: quilt/0.46-1 Date: Tue, 03 Mar 2009 21:49:22 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , Peter Zijlstra , Frederic Weisbecker , Theodore Tso , Arjan van de Ven , Pekka Paalanen , Arnaldo Carvalho de Melo , "H. Peter Anvin" , Mathieu Desnoyers , Martin Bligh , "Frank Ch. Eigler" , Tom Zanussi , Masami Hiramatsu , KOSAKI Motohiro , Jason Baron , Christoph Hellwig , Jiaying Zhang , Eduard - Gabriel Munteanu , mrubin@google.com, md@google.com, Steven Rostedt Subject: [PATCH 1/5] ring-buffer: reset write field for ring_buffer_read_page Content-Disposition: inline; filename=0001-ring-buffer-reset-write-field-for-ring_buffer_read_.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Steven Rostedt Impact: fix ring_buffer_read_page After a page is swapped into the ring buffer, the write field must also be reset. Signed-off-by: Steven Rostedt --- kernel/trace/ring_buffer.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index a8c275c..9baad7e 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -2492,6 +2492,7 @@ int ring_buffer_read_page(struct ring_buffer *buffer, rb_init_page(bpage); bpage = cpu_buffer->reader_page->page; cpu_buffer->reader_page->page = *data_page; + local_set(&cpu_buffer->reader_page->write, 0); cpu_buffer->reader_page->read = 0; *data_page = bpage; } -- 1.5.6.5 --