Make irq_*_affinity depend on CONFIG_GENERIC_HARDIRQS too.

[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 ece6cfb..7c2e326 100644 (file)
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -63,7 +63,7 @@ irq_trace(void)
  */
 static __cacheline_aligned_in_smp      unsigned long max_sequence;
 
-#ifdef CONFIG_FTRACE
+#ifdef CONFIG_FUNCTION_TRACER
 /*
  * irqsoff uses its own tracer function to keep the overhead down:
  */
@@ -95,7 +95,7 @@ irqsoff_tracer_call(unsigned long ip, unsigned long parent_ip)
        disabled = atomic_inc_return(&data->disabled);
 
        if (likely(disabled == 1))
-               trace_function(tr, data, ip, parent_ip, flags);
+               trace_function(tr, data, ip, parent_ip, flags, preempt_count());
 
        atomic_dec(&data->disabled);
 }
@@ -104,7 +104,7 @@ static struct ftrace_ops trace_ops __read_mostly =
 {
        .func = irqsoff_tracer_call,
 };
-#endif /* CONFIG_FTRACE */
+#endif /* CONFIG_FUNCTION_TRACER */
 
 /*
  * Should this new latency be reported/recorded?
@@ -130,6 +130,7 @@ check_critical_timing(struct trace_array *tr,
        unsigned long latency, t0, t1;
        cycle_t T0, T1, delta;
        unsigned long flags;
+       int pc;
 
        /*
         * usecs conversion is slow so we try to delay the conversion
@@ -141,6 +142,8 @@ check_critical_timing(struct trace_array *tr,
 
        local_save_flags(flags);
 
+       pc = preempt_count();
+
        if (!report_latency(delta))
                goto out;
 
@@ -150,7 +153,7 @@ check_critical_timing(struct trace_array *tr,
        if (!report_latency(delta))
                goto out_unlock;
 
-       trace_function(tr, data, CALLER_ADDR0, parent_ip, flags);
+       trace_function(tr, data, CALLER_ADDR0, parent_ip, flags, pc);
 
        latency = nsecs_to_usecs(delta);
 
@@ -173,8 +176,8 @@ out_unlock:
 out:
        data->critical_sequence = max_sequence;
        data->preempt_timestamp = ftrace_now(cpu);
-       tracing_reset(data);
-       trace_function(tr, data, CALLER_ADDR0, parent_ip, flags);
+       tracing_reset(tr, cpu);
+       trace_function(tr, data, CALLER_ADDR0, parent_ip, flags, pc);
 }
 
 static inline void
@@ -203,11 +206,11 @@ start_critical_timing(unsigned long ip, unsigned long parent_ip)
        data->critical_sequence = max_sequence;
        data->preempt_timestamp = ftrace_now(cpu);
        data->critical_start = parent_ip ? : ip;
-       tracing_reset(data);
+       tracing_reset(tr, cpu);
 
        local_save_flags(flags);
 
-       trace_function(tr, data, ip, parent_ip, flags);
+       trace_function(tr, data, ip, parent_ip, flags, preempt_count());
 
        per_cpu(tracing_cpu, cpu) = 1;
 
@@ -234,14 +237,14 @@ stop_critical_timing(unsigned long ip, unsigned long parent_ip)
 
        data = tr->data[cpu];
 
-       if (unlikely(!data) || unlikely(!head_page(data)) ||
+       if (unlikely(!data) ||
            !data->critical_start || atomic_read(&data->disabled))
                return;
 
        atomic_inc(&data->disabled);
 
        local_save_flags(flags);
-       trace_function(tr, data, ip, parent_ip, flags);
+       trace_function(tr, data, ip, parent_ip, flags, preempt_count());
        check_critical_timing(tr, data, parent_ip ? : ip, cpu);
        data->critical_start = 0;
        atomic_dec(&data->disabled);
@@ -350,15 +353,28 @@ 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);
-       tracer_enabled = 1;
+       if (tracing_is_enabled()) {
+               tracer_enabled = 1;
+               save_tracer_enabled = 1;
+       } 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);
 }
 
@@ -367,53 +383,55 @@ static void __irqsoff_tracer_init(struct trace_array *tr)
        irqsoff_trace = tr;
        /* make sure that the tracer is visible */
        smp_wmb();
-
-       if (tr->ctrl)
-               start_irqsoff_tracer(tr);
+       start_irqsoff_tracer(tr);
 }
 
 static void irqsoff_tracer_reset(struct trace_array *tr)
 {
-       if (tr->ctrl)
-               stop_irqsoff_tracer(tr);
+       stop_irqsoff_tracer(tr);
 }
 
-static void irqsoff_tracer_ctrl_update(struct trace_array *tr)
+static void irqsoff_tracer_start(struct trace_array *tr)
 {
-       if (tr->ctrl)
-               start_irqsoff_tracer(tr);
-       else
-               stop_irqsoff_tracer(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 */
-       if (iter->tr->ctrl)
-               stop_irqsoff_tracer(iter->tr);
+       tracer_enabled = 0;
 }
 
 static void irqsoff_tracer_close(struct trace_iterator *iter)
 {
-       if (iter->tr->ctrl)
-               start_irqsoff_tracer(iter->tr);
+       /* restart tracing */
+       tracer_enabled = save_tracer_enabled;
 }
 
 #ifdef CONFIG_IRQSOFF_TRACER
-static void irqsoff_tracer_init(struct trace_array *tr)
+static int irqsoff_tracer_init(struct trace_array *tr)
 {
        trace_type = TRACER_IRQS_OFF;
 
        __irqsoff_tracer_init(tr);
+       return 0;
 }
 static struct tracer irqsoff_tracer __read_mostly =
 {
        .name           = "irqsoff",
        .init           = irqsoff_tracer_init,
        .reset          = irqsoff_tracer_reset,
+       .start          = irqsoff_tracer_start,
+       .stop           = irqsoff_tracer_stop,
        .open           = irqsoff_tracer_open,
        .close          = irqsoff_tracer_close,
-       .ctrl_update    = irqsoff_tracer_ctrl_update,
        .print_max      = 1,
 #ifdef CONFIG_FTRACE_SELFTEST
        .selftest    = trace_selftest_startup_irqsoff,
@@ -425,11 +443,12 @@ static struct tracer irqsoff_tracer __read_mostly =
 #endif
 
 #ifdef CONFIG_PREEMPT_TRACER
-static void preemptoff_tracer_init(struct trace_array *tr)
+static int preemptoff_tracer_init(struct trace_array *tr)
 {
        trace_type = TRACER_PREEMPT_OFF;
 
        __irqsoff_tracer_init(tr);
+       return 0;
 }
 
 static struct tracer preemptoff_tracer __read_mostly =
@@ -437,9 +456,10 @@ static struct tracer preemptoff_tracer __read_mostly =
        .name           = "preemptoff",
        .init           = preemptoff_tracer_init,
        .reset          = irqsoff_tracer_reset,
+       .start          = irqsoff_tracer_start,
+       .stop           = irqsoff_tracer_stop,
        .open           = irqsoff_tracer_open,
        .close          = irqsoff_tracer_close,
-       .ctrl_update    = irqsoff_tracer_ctrl_update,
        .print_max      = 1,
 #ifdef CONFIG_FTRACE_SELFTEST
        .selftest    = trace_selftest_startup_preemptoff,
@@ -453,11 +473,12 @@ static struct tracer preemptoff_tracer __read_mostly =
 #if defined(CONFIG_IRQSOFF_TRACER) && \
        defined(CONFIG_PREEMPT_TRACER)
 
-static void preemptirqsoff_tracer_init(struct trace_array *tr)
+static int preemptirqsoff_tracer_init(struct trace_array *tr)
 {
        trace_type = TRACER_IRQS_OFF | TRACER_PREEMPT_OFF;
 
        __irqsoff_tracer_init(tr);
+       return 0;
 }
 
 static struct tracer preemptirqsoff_tracer __read_mostly =
@@ -465,9 +486,10 @@ static struct tracer preemptirqsoff_tracer __read_mostly =
        .name           = "preemptirqsoff",
        .init           = preemptirqsoff_tracer_init,
        .reset          = irqsoff_tracer_reset,
+       .start          = irqsoff_tracer_start,
+       .stop           = irqsoff_tracer_stop,
        .open           = irqsoff_tracer_open,
        .close          = irqsoff_tracer_close,
-       .ctrl_update    = irqsoff_tracer_ctrl_update,
        .print_max      = 1,
 #ifdef CONFIG_FTRACE_SELFTEST
        .selftest    = trace_selftest_startup_preemptirqsoff,