trace: remove internal irqsoff disabling for trace output

[safe/jmp/linux-2.6] / kernel / trace / trace_irqsoff.c

diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index 62a78d9..ed344b0 100644 (file)
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -353,28 +353,18 @@ void trace_preempt_off(unsigned long a0, unsigned long a1)
 }
 #endif /* CONFIG_PREEMPT_TRACER */
 
-/*
- * save_tracer_enabled is used to save the state of the tracer_enabled
- * variable when we disable it when we open a trace output file.
- */
-static int save_tracer_enabled;
-
 static void start_irqsoff_tracer(struct trace_array *tr)
 {
        register_ftrace_function(&trace_ops);
-       if (tracing_is_enabled()) {
+       if (tracing_is_enabled())
                tracer_enabled = 1;
-               save_tracer_enabled = 1;
-       } else {
+       else
                tracer_enabled = 0;
-               save_tracer_enabled = 0;
-       }
 }
 
 static void stop_irqsoff_tracer(struct trace_array *tr)
 {
        tracer_enabled = 0;
-       save_tracer_enabled = 0;
        unregister_ftrace_function(&trace_ops);
 }
 
@@ -395,25 +385,11 @@ static void irqsoff_tracer_reset(struct trace_array *tr)
 static void irqsoff_tracer_start(struct trace_array *tr)
 {
        tracer_enabled = 1;
-       save_tracer_enabled = 1;
 }
 
 static void irqsoff_tracer_stop(struct trace_array *tr)
 {
        tracer_enabled = 0;
-       save_tracer_enabled = 0;
-}
-
-static void irqsoff_tracer_open(struct trace_iterator *iter)
-{
-       /* stop the trace while dumping */
-       tracer_enabled = 0;
-}
-
-static void irqsoff_tracer_close(struct trace_iterator *iter)
-{
-       /* restart tracing */
-       tracer_enabled = save_tracer_enabled;
 }
 
 #ifdef CONFIG_IRQSOFF_TRACER
@@ -431,8 +407,6 @@ static struct tracer irqsoff_tracer __read_mostly =
        .reset          = irqsoff_tracer_reset,
        .start          = irqsoff_tracer_start,
        .stop           = irqsoff_tracer_stop,
-       .open           = irqsoff_tracer_open,
-       .close          = irqsoff_tracer_close,
        .print_max      = 1,
 #ifdef CONFIG_FTRACE_SELFTEST
        .selftest    = trace_selftest_startup_irqsoff,
@@ -459,8 +433,6 @@ static struct tracer preemptoff_tracer __read_mostly =
        .reset          = irqsoff_tracer_reset,
        .start          = irqsoff_tracer_start,
        .stop           = irqsoff_tracer_stop,
-       .open           = irqsoff_tracer_open,
-       .close          = irqsoff_tracer_close,
        .print_max      = 1,
 #ifdef CONFIG_FTRACE_SELFTEST
        .selftest    = trace_selftest_startup_preemptoff,
@@ -489,8 +461,6 @@ static struct tracer preemptirqsoff_tracer __read_mostly =
        .reset          = irqsoff_tracer_reset,
        .start          = irqsoff_tracer_start,
        .stop           = irqsoff_tracer_stop,
-       .open           = irqsoff_tracer_open,
-       .close          = irqsoff_tracer_close,
        .print_max      = 1,
 #ifdef CONFIG_FTRACE_SELFTEST
        .selftest    = trace_selftest_startup_preemptirqsoff,