Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932779AbbFHVfb (ORCPT ); Mon, 8 Jun 2015 17:35:31 -0400 Received: from mga02.intel.com ([134.134.136.20]:4812 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752956AbbFHVcQ (ORCPT ); Mon, 8 Jun 2015 17:32:16 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,575,1427785200"; d="scan'208";a="707529639" From: Tom Zanussi To: rostedt@goodmis.org Cc: daniel.wagner@bmw-carit.de, masami.hiramatsu.pt@hitachi.com, namhyung@kernel.org, josh@joshtriplett.org, andi@firstfloor.org, linux-kernel@vger.kernel.org, Tom Zanussi Subject: [PATCH v3 01/10] tracing: Update cond flag when enabling or disabling a trigger Date: Mon, 8 Jun 2015 16:32:00 -0500 Message-Id: X-Mailer: git-send-email 1.9.3 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2303 Lines: 73 When a trigger is enabled, the cond flag should be set beforehand, otherwise a trigger that's expecting to process a trace record (e.g. one with post_trigger set) could be invoked without one. Likewise a trigger's cond flag should be reset after it's disabled, not before. Signed-off-by: Tom Zanussi Signed-off-by: Daniel Wagner --- kernel/trace/trace_events_trigger.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/kernel/trace/trace_events_trigger.c b/kernel/trace/trace_events_trigger.c index 42a4009..4d2f3cc 100644 --- a/kernel/trace/trace_events_trigger.c +++ b/kernel/trace/trace_events_trigger.c @@ -543,11 +543,12 @@ static int register_trigger(char *glob, struct event_trigger_ops *ops, list_add_rcu(&data->list, &file->triggers); ret++; + update_cond_flag(file); if (trace_event_trigger_enable_disable(file, 1) < 0) { list_del_rcu(&data->list); + update_cond_flag(file); ret--; } - update_cond_flag(file); out: return ret; } @@ -575,8 +576,8 @@ static void unregister_trigger(char *glob, struct event_trigger_ops *ops, if (data->cmd_ops->trigger_type == test->cmd_ops->trigger_type) { unregistered = true; list_del_rcu(&data->list); - update_cond_flag(file); trace_event_trigger_enable_disable(file, 0); + update_cond_flag(file); break; } } @@ -1319,11 +1320,12 @@ static int event_enable_register_trigger(char *glob, list_add_rcu(&data->list, &file->triggers); ret++; + update_cond_flag(file); if (trace_event_trigger_enable_disable(file, 1) < 0) { list_del_rcu(&data->list); + update_cond_flag(file); ret--; } - update_cond_flag(file); out: return ret; } @@ -1344,8 +1346,8 @@ static void event_enable_unregister_trigger(char *glob, (enable_data->file == test_enable_data->file)) { unregistered = true; list_del_rcu(&data->list); - update_cond_flag(file); trace_event_trigger_enable_disable(file, 0); + update_cond_flag(file); break; } } -- 1.9.3 -- 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/