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Commit 0aeb1def authored by Cong Wang's avatar Cong Wang Committed by Steven Rostedt (VMware)
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tracing: Make trace_get_fields() global 

trace_get_fields() is the only way to read tracepoint fields at
run time, as their fields are defined at compile-time with macros.
Make this function visible to all users and it will be used by
trace event injection code to calculate the size of a tracepoint
entry.
Link: http://lkml.kernel.org/r/20190525165802.25944-4-xiyou.wangcong@gmail.com



Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
parent 5967bd5c

include/linux/trace_events.h

+8 −0
Original line number Diff line number Diff line
@@ -318,6 +318,14 @@ trace_event_name(struct trace_event_call *call) 
		return call->name;

}



static inline struct list_head *

trace_get_fields(struct trace_event_call *event_call)

{

	if (!event_call->class->get_fields)

		return &event_call->class->fields;

	return event_call->class->get_fields(event_call);

}



struct trace_array;

struct trace_subsystem_dir;

kernel/trace/trace_events.c

+0 −8
Original line number Diff line number Diff line
@@ -70,14 +70,6 @@ static int system_refcount_dec(struct event_subsystem *system) 
#define while_for_each_event_file()		\

	}



static struct list_head *

trace_get_fields(struct trace_event_call *event_call)

{

	if (!event_call->class->get_fields)

		return &event_call->class->fields;

	return event_call->class->get_fields(event_call);

}



static struct ftrace_event_field *

__find_event_field(struct list_head *head, char *name)

{