ftrace: move ftrace_special to trace.c

Move the ftrace_special out of sched_switch to trace.c.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Cc: pq@iki.fi
Cc: proski@gnu.org
Cc: sandmann@redhat.com
Cc: a.p.zijlstra@chello.nl
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 25 insertions, 2 deletions

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 0567f51bbea4..583fe24903d3 100644
--- 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;