ftrace: move ftrace_special to trace.c

[karo-tx-linux.git] / kernel / trace / trace.c

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 0567f51bbea4a4070876f3a2f59cfba11bdfb795..583fe24903d39c35240bc66f976dd4a1b156ad02 100644 (file)
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -941,6 +941,30 @@ tracing_sched_wakeup_trace(struct trace_array *tr,
        trace_wake_up();
 }
 
+void
+ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3)
+{
+       struct trace_array *tr = &global_trace;
+       struct trace_array_cpu *data;
+       unsigned long flags;
+       long disabled;
+       int cpu;
+
+       if (tracing_disabled || current_trace == &no_tracer || !tr->ctrl)
+               return;
+
+       local_irq_save(flags);
+       cpu = raw_smp_processor_id();
+       data = tr->data[cpu];
+       disabled = atomic_inc_return(&data->disabled);
+
+       if (likely(disabled == 1))
+               __trace_special(tr, data, arg1, arg2, arg3);
+
+       atomic_dec(&data->disabled);
+       local_irq_restore(flags);
+}
+
 #ifdef CONFIG_FTRACE
 static void
 function_trace_call(unsigned long ip, unsigned long parent_ip)
@@ -2941,8 +2965,6 @@ __init static int tracer_alloc_buffers(void)
        int ret = -ENOMEM;
        int i;
 
-       global_trace.ctrl = tracer_enabled;
-
        /* TODO: make the number of buffers hot pluggable with CPUS */
        tracing_nr_buffers = num_possible_cpus();
        tracing_buffer_mask = cpu_possible_map;
@@ -3012,6 +3034,7 @@ __init static int tracer_alloc_buffers(void)
        current_trace = &no_tracer;
 
        /* All seems OK, enable tracing */
+       global_trace.ctrl = tracer_enabled;
        tracing_disabled = 0;
 
        return 0;