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Commit c0a0d0d3 authored by Frederic Weisbecker's avatar Frederic Weisbecker
Browse files

tracing/core: Make the stack entry helpers global 



Make the stacktrace event insertion helpers globals.
This has two effects:

- Prepare for moving the sched events insertion helpers to
  the sched switch tracer file.
- Move some ifdef outside function definitions

Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
parent 5e5bf483

kernel/trace/trace.c

+8 −16
Original line number Diff line number Diff line
@@ -866,10 +866,6 @@ struct ring_buffer_event *trace_buffer_lock_reserve(struct trace_array *tr, 


	return event;

}

static void ftrace_trace_stack(struct trace_array *tr,

			       unsigned long flags, int skip, int pc);

static void ftrace_trace_userstack(struct trace_array *tr,

				   unsigned long flags, int pc);



static inline void __trace_buffer_unlock_commit(struct trace_array *tr,

					struct ring_buffer_event *event,
@@ -1003,11 +999,11 @@ ftrace(struct trace_array *tr, struct trace_array_cpu *data, 
		trace_function(tr, ip, parent_ip, flags, pc);

}



#ifdef CONFIG_STACKTRACE

static void __ftrace_trace_stack(struct trace_array *tr,

				 unsigned long flags,

				 int skip, int pc)

{

#ifdef CONFIG_STACKTRACE

	struct ftrace_event_call *call = &event_kernel_stack;

	struct ring_buffer_event *event;

	struct stack_entry *entry;
@@ -1028,12 +1024,10 @@ static void __ftrace_trace_stack(struct trace_array *tr, 
	save_stack_trace(&trace);

	if (!filter_check_discard(call, entry, tr->buffer, event))

		ring_buffer_unlock_commit(tr->buffer, event);

#endif

}



static void ftrace_trace_stack(struct trace_array *tr,

			       unsigned long flags,

			       int skip, int pc)

void ftrace_trace_stack(struct trace_array *tr, unsigned long flags, int skip,

			int pc)

{

	if (!(trace_flags & TRACE_ITER_STACKTRACE))

		return;
@@ -1041,17 +1035,14 @@ static void ftrace_trace_stack(struct trace_array *tr, 
	__ftrace_trace_stack(tr, flags, skip, pc);

}



void __trace_stack(struct trace_array *tr,

		   unsigned long flags,

		   int skip, int pc)

void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,

		   int pc)

{

	__ftrace_trace_stack(tr, flags, skip, pc);

}



static void ftrace_trace_userstack(struct trace_array *tr,

				   unsigned long flags, int pc)

void ftrace_trace_userstack(struct trace_array *tr, unsigned long flags, int pc)

{

#ifdef CONFIG_STACKTRACE

	struct ftrace_event_call *call = &event_user_stack;

	struct ring_buffer_event *event;

	struct userstack_entry *entry;
@@ -1076,7 +1067,6 @@ static void ftrace_trace_userstack(struct trace_array *tr, 
	save_stack_trace_user(&trace);

	if (!filter_check_discard(call, entry, tr->buffer, event))

		ring_buffer_unlock_commit(tr->buffer, event);

#endif

}



#ifdef UNUSED
@@ -1086,6 +1076,8 @@ static void __trace_userstack(struct trace_array *tr, unsigned long flags) 
}

#endif /* UNUSED */



#endif /* CONFIG_STACKTRACE */



static void

ftrace_trace_special(void *__tr,

		     unsigned long arg1, unsigned long arg2, unsigned long arg3,

kernel/trace/trace.h

+25 −3
Original line number Diff line number Diff line
@@ -489,10 +489,32 @@ void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu); 
void update_max_tr_single(struct trace_array *tr,

			  struct task_struct *tsk, int cpu);



void __trace_stack(struct trace_array *tr,

		   unsigned long flags,

#ifdef CONFIG_STACKTRACE

void ftrace_trace_stack(struct trace_array *tr, unsigned long flags,

			int skip, int pc);



void ftrace_trace_userstack(struct trace_array *tr, unsigned long flags,

			    int pc);



void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,

		   int pc);

#else

static inline void ftrace_trace_stack(struct trace_array *tr,

				      unsigned long flags, int skip, int pc)

{

}



static inline void ftrace_trace_userstack(struct trace_array *tr,

					  unsigned long flags, int pc)

{

}



static inline void __trace_stack(struct trace_array *tr, unsigned long flags,

				 int skip, int pc)

{

}

#endif /* CONFIG_STACKTRACE */



extern cycle_t ftrace_now(int cpu);



#ifdef CONFIG_CONTEXT_SWITCH_TRACER