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Commit ca65ef1a authored by Steven Rostedt (Red Hat)'s avatar Steven Rostedt (Red Hat) Committed by Steven Rostedt
Browse files

Merge branch 'trace/ftrace/urgent' into trace/ftrace/core 

Needed 099ed151 "tracing: Remove ftrace_stop/start() from
 reading the trace file" for the removal of ftrace_start/stop().
parents d048a8c7 099ed151

kernel/events/uprobes.c

+3 −3
Original line number Diff line number Diff line
@@ -846,7 +846,7 @@ static void __uprobe_unregister(struct uprobe *uprobe, struct uprobe_consumer *u 
{

	int err;



	if (!consumer_del(uprobe, uc))	/* WARN? */

	if (WARN_ON(!consumer_del(uprobe, uc)))

		return;



	err = register_for_each_vma(uprobe, NULL);
@@ -927,7 +927,7 @@ int uprobe_apply(struct inode *inode, loff_t offset, 
	int ret = -ENOENT;



	uprobe = find_uprobe(inode, offset);

	if (!uprobe)

	if (WARN_ON(!uprobe))

		return ret;



	down_write(&uprobe->register_rwsem);
@@ -952,7 +952,7 @@ void uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consume 
	struct uprobe *uprobe;



	uprobe = find_uprobe(inode, offset);

	if (!uprobe)

	if (WARN_ON(!uprobe))

		return;



	down_write(&uprobe->register_rwsem);

kernel/trace/trace.c

+0 −2
Original line number Diff line number Diff line
@@ -1372,7 +1372,6 @@ void tracing_start(void) 


	arch_spin_unlock(&global_trace.max_lock);



	ftrace_start();

 out:

	raw_spin_unlock_irqrestore(&global_trace.start_lock, flags);

}
@@ -1419,7 +1418,6 @@ void tracing_stop(void) 
	struct ring_buffer *buffer;

	unsigned long flags;



	ftrace_stop();

	raw_spin_lock_irqsave(&global_trace.start_lock, flags);

	if (global_trace.stop_count++)

		goto out;

kernel/trace/trace_uprobe.c

+27 −19
Original line number Diff line number Diff line
@@ -893,6 +893,9 @@ probe_event_enable(struct trace_uprobe *tu, struct ftrace_event_file *file, 
	int ret;



	if (file) {

		if (tu->tp.flags & TP_FLAG_PROFILE)

			return -EINTR;



		link = kmalloc(sizeof(*link), GFP_KERNEL);

		if (!link)

			return -ENOMEM;
@@ -901,29 +904,40 @@ probe_event_enable(struct trace_uprobe *tu, struct ftrace_event_file *file, 
		list_add_tail_rcu(&link->list, &tu->tp.files);



		tu->tp.flags |= TP_FLAG_TRACE;

	} else

		tu->tp.flags |= TP_FLAG_PROFILE;

	} else {

		if (tu->tp.flags & TP_FLAG_TRACE)

			return -EINTR;



	ret = uprobe_buffer_enable();

	if (ret < 0)

		return ret;

		tu->tp.flags |= TP_FLAG_PROFILE;

	}



	WARN_ON(!uprobe_filter_is_empty(&tu->filter));



	if (enabled)

		return 0;



	ret = uprobe_buffer_enable();

	if (ret)

		goto err_flags;



	tu->consumer.filter = filter;

	ret = uprobe_register(tu->inode, tu->offset, &tu->consumer);

	if (ret) {

	if (ret)

		goto err_buffer;



	return 0;



 err_buffer:

	uprobe_buffer_disable();



 err_flags:

	if (file) {

		list_del(&link->list);

		kfree(link);

		tu->tp.flags &= ~TP_FLAG_TRACE;

		} else

	} else {

		tu->tp.flags &= ~TP_FLAG_PROFILE;

	}



	return ret;

}
@@ -1201,12 +1215,6 @@ static int uprobe_dispatcher(struct uprobe_consumer *con, struct pt_regs *regs) 


	current->utask->vaddr = (unsigned long) &udd;



#ifdef CONFIG_PERF_EVENTS

	if ((tu->tp.flags & TP_FLAG_TRACE) == 0 &&

	    !uprobe_perf_filter(&tu->consumer, 0, current->mm))

		return UPROBE_HANDLER_REMOVE;

#endif



	if (WARN_ON_ONCE(!uprobe_cpu_buffer))

		return 0;