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tracing: Save one trace_event->type by using __TRACE_LAST_TYPE
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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

Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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Wei Yang authored and Steven Rostedt (VMware) committed Jul 9, 2020
1 parent 746cf34 commit 36b8aac
Showing 1 changed file with 2 additions and 2 deletions.
4 changes: 2 additions & 2 deletions kernel/trace/trace_output.c
Original file line number Diff line number Diff line change
@@ -20,7 +20,7 @@ DECLARE_RWSEM(trace_event_sem);

static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;

static int next_event_type = __TRACE_LAST_TYPE + 1;
static int next_event_type = __TRACE_LAST_TYPE;

enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter)
{
@@ -675,7 +675,7 @@ static LIST_HEAD(ftrace_event_list);
static int trace_search_list(struct list_head **list)
{
struct trace_event *e;
int next = __TRACE_LAST_TYPE + 1;
int next = __TRACE_LAST_TYPE;

if (list_empty(&ftrace_event_list)) {
*list = &ftrace_event_list;

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