tracing: Save one trace_event->type by using __TRACE_LAST_TYPE

Static defined trace_event->type stops at (__TRACE_LAST_TYPE - 1) and dynamic trace_event->type starts from (__TRACE_LAST_TYPE + 1). To save one trace_event->type index, let's use __TRACE_LAST_TYPE. Link: https://lkml.kernel.org/r/20200703020612.12930-3-richard.weiyang@linux.alibaba.com

Wei Yang committed 6 years ago

Commit 36b8aac1 parent 746cf341 file · +2 −2Browse files

Unified · Split

kernel/trace/trace_output.c+2−2

@@ -20,7 +20,7 @@ DECLARE_RWSEM(trace_event_sem); · 19 unmodified lines
20	20
21	21	static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
22	22
23		−static int next_event_type = __TRACE_LAST_TYPE + 1;
	23	+static int next_event_type = __TRACE_LAST_TYPE;
24	24
25	25	enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter)
26	26	{
@@ -675,7 +675,7 @@ static LIST_HEAD(ftrace_event_list); · 648 unmodified lines
675	675	static int trace_search_list(struct list_head **list)
676	676	{
677	677	struct trace_event *e;
678		− int next = __TRACE_LAST_TYPE + 1;
	678	+ int next = __TRACE_LAST_TYPE;
679	679
680	680	if (list_empty(&ftrace_event_list)) {
681	681	*list = &ftrace_event_list;