forked from Minki/linux
tracing: Rearrange functions in trace_sched_wakeup.c
Rearrange the functions in trace_sched_wakeup.c so that there are fewer #ifdef CONFIG_FUNCTION_TRACER and #ifdef CONFIG_FUNCTION_GRAPH_TRACER, instead of having the #ifdefs spread all over. No functional change is made. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (VMware)
parent
e73e679f65
commit
317e04ca90
@ -35,26 +35,19 @@ static arch_spinlock_t wakeup_lock =
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static void wakeup_reset(struct trace_array *tr);
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static void __wakeup_reset(struct trace_array *tr);
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static int start_func_tracer(struct trace_array *tr, int graph);
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static void stop_func_tracer(struct trace_array *tr, int graph);
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static int save_flags;
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#ifdef CONFIG_FUNCTION_GRAPH_TRACER
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static int wakeup_display_graph(struct trace_array *tr, int set);
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# define is_graph(tr) ((tr)->trace_flags & TRACE_ITER_DISPLAY_GRAPH)
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#else
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static inline int wakeup_display_graph(struct trace_array *tr, int set)
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{
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return 0;
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}
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# define is_graph(tr) false
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#endif
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#ifdef CONFIG_FUNCTION_TRACER
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static int wakeup_graph_entry(struct ftrace_graph_ent *trace);
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static void wakeup_graph_return(struct ftrace_graph_ret *trace);
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static bool function_enabled;
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/*
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@ -104,122 +97,8 @@ out_enable:
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return 0;
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}
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/*
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* wakeup uses its own tracer function to keep the overhead down:
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*/
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static void
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wakeup_tracer_call(unsigned long ip, unsigned long parent_ip,
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struct ftrace_ops *op, struct pt_regs *pt_regs)
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{
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struct trace_array *tr = wakeup_trace;
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struct trace_array_cpu *data;
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unsigned long flags;
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int pc;
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if (!func_prolog_preempt_disable(tr, &data, &pc))
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return;
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local_irq_save(flags);
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trace_function(tr, ip, parent_ip, flags, pc);
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local_irq_restore(flags);
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atomic_dec(&data->disabled);
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preempt_enable_notrace();
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}
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static int register_wakeup_function(struct trace_array *tr, int graph, int set)
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{
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int ret;
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/* 'set' is set if TRACE_ITER_FUNCTION is about to be set */
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if (function_enabled || (!set && !(tr->trace_flags & TRACE_ITER_FUNCTION)))
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return 0;
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if (graph)
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ret = register_ftrace_graph(&wakeup_graph_return,
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&wakeup_graph_entry);
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else
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ret = register_ftrace_function(tr->ops);
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if (!ret)
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function_enabled = true;
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return ret;
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}
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static void unregister_wakeup_function(struct trace_array *tr, int graph)
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{
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if (!function_enabled)
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return;
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if (graph)
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unregister_ftrace_graph();
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else
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unregister_ftrace_function(tr->ops);
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function_enabled = false;
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}
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static int wakeup_function_set(struct trace_array *tr, u32 mask, int set)
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{
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if (!(mask & TRACE_ITER_FUNCTION))
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return 0;
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if (set)
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register_wakeup_function(tr, is_graph(tr), 1);
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else
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unregister_wakeup_function(tr, is_graph(tr));
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return 1;
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}
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#else
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static int register_wakeup_function(struct trace_array *tr, int graph, int set)
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{
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return 0;
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}
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static void unregister_wakeup_function(struct trace_array *tr, int graph) { }
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static int wakeup_function_set(struct trace_array *tr, u32 mask, int set)
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{
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return 0;
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}
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#endif /* CONFIG_FUNCTION_TRACER */
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static int wakeup_flag_changed(struct trace_array *tr, u32 mask, int set)
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{
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struct tracer *tracer = tr->current_trace;
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if (wakeup_function_set(tr, mask, set))
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return 0;
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#ifdef CONFIG_FUNCTION_GRAPH_TRACER
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if (mask & TRACE_ITER_DISPLAY_GRAPH)
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return wakeup_display_graph(tr, set);
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#endif
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return trace_keep_overwrite(tracer, mask, set);
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}
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static int start_func_tracer(struct trace_array *tr, int graph)
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{
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int ret;
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ret = register_wakeup_function(tr, graph, 0);
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if (!ret && tracing_is_enabled())
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tracer_enabled = 1;
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else
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tracer_enabled = 0;
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return ret;
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}
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static void stop_func_tracer(struct trace_array *tr, int graph)
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{
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tracer_enabled = 0;
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unregister_wakeup_function(tr, graph);
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}
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#ifdef CONFIG_FUNCTION_GRAPH_TRACER
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static int wakeup_display_graph(struct trace_array *tr, int set)
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{
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if (!(is_graph(tr) ^ set))
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@ -318,6 +197,107 @@ static void wakeup_print_header(struct seq_file *s)
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else
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trace_default_header(s);
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}
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#else /* CONFIG_FUNCTION_GRAPH_TRACER */
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static int wakeup_graph_entry(struct ftrace_graph_ent *trace)
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{
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return -1;
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}
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static void wakeup_graph_return(struct ftrace_graph_ret *trace) { }
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#endif /* else CONFIG_FUNCTION_GRAPH_TRACER */
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/*
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* wakeup uses its own tracer function to keep the overhead down:
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*/
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static void
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wakeup_tracer_call(unsigned long ip, unsigned long parent_ip,
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struct ftrace_ops *op, struct pt_regs *pt_regs)
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{
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struct trace_array *tr = wakeup_trace;
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struct trace_array_cpu *data;
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unsigned long flags;
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int pc;
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if (!func_prolog_preempt_disable(tr, &data, &pc))
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return;
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local_irq_save(flags);
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trace_function(tr, ip, parent_ip, flags, pc);
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local_irq_restore(flags);
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atomic_dec(&data->disabled);
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preempt_enable_notrace();
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}
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static int register_wakeup_function(struct trace_array *tr, int graph, int set)
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{
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int ret;
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/* 'set' is set if TRACE_ITER_FUNCTION is about to be set */
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if (function_enabled || (!set && !(tr->trace_flags & TRACE_ITER_FUNCTION)))
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return 0;
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if (graph)
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ret = register_ftrace_graph(&wakeup_graph_return,
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&wakeup_graph_entry);
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else
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ret = register_ftrace_function(tr->ops);
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if (!ret)
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function_enabled = true;
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return ret;
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}
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static void unregister_wakeup_function(struct trace_array *tr, int graph)
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{
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if (!function_enabled)
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return;
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if (graph)
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unregister_ftrace_graph();
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else
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unregister_ftrace_function(tr->ops);
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function_enabled = false;
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}
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static int wakeup_function_set(struct trace_array *tr, u32 mask, int set)
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{
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if (!(mask & TRACE_ITER_FUNCTION))
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return 0;
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if (set)
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register_wakeup_function(tr, is_graph(tr), 1);
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else
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unregister_wakeup_function(tr, is_graph(tr));
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return 1;
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}
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#else /* CONFIG_FUNCTION_TRACER */
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static int register_wakeup_function(struct trace_array *tr, int graph, int set)
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{
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return 0;
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}
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static void unregister_wakeup_function(struct trace_array *tr, int graph) { }
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static int wakeup_function_set(struct trace_array *tr, u32 mask, int set)
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{
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return 0;
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}
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#endif /* else CONFIG_FUNCTION_TRACER */
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#ifndef CONFIG_FUNCTION_GRAPH_TRACER
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static enum print_line_t wakeup_print_line(struct trace_iterator *iter)
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{
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return TRACE_TYPE_UNHANDLED;
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}
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static void wakeup_trace_open(struct trace_iterator *iter) { }
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static void wakeup_trace_close(struct trace_iterator *iter) { }
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static void wakeup_print_header(struct seq_file *s)
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{
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trace_default_header(s);
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}
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#endif /* !CONFIG_FUNCTION_GRAPH_TRACER */
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static void
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__trace_function(struct trace_array *tr,
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@ -329,34 +309,42 @@ __trace_function(struct trace_array *tr,
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else
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trace_function(tr, ip, parent_ip, flags, pc);
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}
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#else
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#define __trace_function trace_function
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static enum print_line_t wakeup_print_line(struct trace_iterator *iter)
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static int wakeup_flag_changed(struct trace_array *tr, u32 mask, int set)
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{
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return TRACE_TYPE_UNHANDLED;
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struct tracer *tracer = tr->current_trace;
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if (wakeup_function_set(tr, mask, set))
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return 0;
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#ifdef CONFIG_FUNCTION_GRAPH_TRACER
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if (mask & TRACE_ITER_DISPLAY_GRAPH)
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return wakeup_display_graph(tr, set);
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#endif
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return trace_keep_overwrite(tracer, mask, set);
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}
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static void wakeup_trace_open(struct trace_iterator *iter) { }
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static void wakeup_trace_close(struct trace_iterator *iter) { }
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static int start_func_tracer(struct trace_array *tr, int graph)
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{
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int ret;
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#ifdef CONFIG_FUNCTION_TRACER
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static int wakeup_graph_entry(struct ftrace_graph_ent *trace)
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{
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return -1;
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ret = register_wakeup_function(tr, graph, 0);
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if (!ret && tracing_is_enabled())
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tracer_enabled = 1;
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else
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tracer_enabled = 0;
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return ret;
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}
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static void wakeup_graph_return(struct ftrace_graph_ret *trace) { }
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static void wakeup_print_header(struct seq_file *s)
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static void stop_func_tracer(struct trace_array *tr, int graph)
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{
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trace_default_header(s);
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tracer_enabled = 0;
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unregister_wakeup_function(tr, graph);
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}
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#else
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static void wakeup_print_header(struct seq_file *s)
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{
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trace_latency_header(s);
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}
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#endif /* CONFIG_FUNCTION_TRACER */
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#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
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/*
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* Should this new latency be reported/recorded?
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