trace: code style clean up

Ingo Molnar suggested using goto logic to keep the indentation
down and to be able to remove the nasty line breaks. This actually
makes the code a bit more readable.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 1d4ff56..3536ef4 100644 (file)
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -522,23 +522,24 @@ int register_tracer(struct tracer *type)
        tracing_selftest_running = false;
        mutex_unlock(&trace_types_lock);
 
-       if (!ret && default_bootup_tracer) {
-               if (!strncmp(default_bootup_tracer, type->name,
-                            BOOTUP_TRACER_SIZE)) {
-                       printk(KERN_INFO "Starting tracer '%s'\n",
-                              type->name);
-                       /* Do we want this tracer to start on bootup? */
-                       tracing_set_tracer(type->name);
-                       default_bootup_tracer = NULL;
-                       /* disable other selftests, since this will break it. */
-                       tracing_selftest_disabled = 1;
+       if (ret || !default_bootup_tracer)
+               goto out_unlock;
+
+       if (strncmp(default_bootup_tracer, type->name, BOOTUP_TRACER_SIZE))
+               goto out_unlock;
+
+       printk(KERN_INFO "Starting tracer '%s'\n", type->name);
+       /* Do we want this tracer to start on bootup? */
+       tracing_set_tracer(type->name);
+       default_bootup_tracer = NULL;
+       /* disable other selftests, since this will break it. */
+       tracing_selftest_disabled = 1;
 #ifdef CONFIG_FTRACE_STARTUP_TEST
-                       printk(KERN_INFO "Disabling FTRACE selftests due"
-                              " to running tracer '%s'\n", type->name);
+       printk(KERN_INFO "Disabling FTRACE selftests due to running tracer '%s'\n",
+              type->name);
 #endif
-               }
-       }
 
+ out_unlock:
        lock_kernel();
        return ret;
 }