linux-kernel - [PATCH 7/7] tracing: change filter_free_subsystem_*() to check ->subsystem rather then ->name

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Message-ID: <20140711190655.GA19549@redhat.com>
Date:	Fri, 11 Jul 2014 21:06:55 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Tom Zanussi <tom.zanussi@...ux.intel.com>,
	"zhangwei(Jovi)" <jovi.zhangwei@...wei.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 7/7] tracing: change filter_free_subsystem_*() to check
	->subsystem rather then ->name

filter_free_subsystem_preds() and filter_free_subsystem_filters()
can rely on file->system->subsystem and avoid strcmp().

Signed-off-by: Oleg Nesterov <oleg@...hat.com>
---
 kernel/trace/trace_events_filter.c |    9 ++-------
 1 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 54a125c..59655bc 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -846,13 +846,10 @@ static void filter_free_subsystem_preds(struct event_subsystem *system,
 					struct trace_array *tr)
 {
 	struct ftrace_event_file *file;
-	struct ftrace_event_call *call;
 
 	list_for_each_entry(file, &tr->events, list) {
-		call = file->event_call;
-		if (strcmp(call->class->system, system->name) != 0)
+		if (file->system->subsystem != system)
 			continue;
-
 		__remove_filter(file);
 	}
 }
@@ -874,11 +871,9 @@ static void filter_free_subsystem_filters(struct event_subsystem *system,
 					  struct trace_array *tr)
 {
 	struct ftrace_event_file *file;
-	struct ftrace_event_call *call;
 
 	list_for_each_entry(file, &tr->events, list) {
-		call = file->event_call;
-		if (strcmp(call->class->system, system->name) != 0)
+		if (file->system->subsystem != system)
 			continue;
 		__free_subsystem_filter(file);
 	}
-- 
1.5.5.1

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