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tracing: Make trace_get_fields() global

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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: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Cong Wang 2019-05-25 09:58:01 -07:00 committed by Steven Rostedt (VMware)
parent 5967bd5c42
commit 0aeb1def44
2 changed files with 8 additions and 8 deletions
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8
include/linux/trace_events.h
View File

@ -318,6 +318,14 @@ trace_event_name(struct trace_event_call *call)
return call->name; 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_array;
struct trace_subsystem_dir; struct trace_subsystem_dir;

8
kernel/trace/trace_events.c
View File

@ -70,14 +70,6 @@ static int system_refcount_dec(struct event_subsystem *system)
#define while_for_each_event_file() \ #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 * static struct ftrace_event_field *
__find_event_field(struct list_head *head, char *name) __find_event_field(struct list_head *head, char *name)
{ {