From: Wei Yang <richard.weiyang@linux.alibaba.com>
To: rostedt@goodmis.org, mingo@redhat.com
Cc: linux-kernel@vger.kernel.org,
Wei Yang <richard.weiyang@linux.alibaba.com>
Subject: [PATCH 3/5] tracing: save one trace_event->type by using __TRACE_LAST_TYPE
Date: Fri, 3 Jul 2020 10:06:10 +0800 [thread overview]
Message-ID: <20200703020612.12930-3-richard.weiyang@linux.alibaba.com> (raw)
In-Reply-To: <20200703020612.12930-1-richard.weiyang@linux.alibaba.com>
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.
Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
---
kernel/trace/trace_output.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index b704b3ef4264..818f0c9d10c5 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -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;
--
2.20.1 (Apple Git-117)
next prev parent reply other threads:[~2020-07-03 2:06 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-03 2:06 [PATCH 1/5] tracing: use union to simplify the trace_event_functions initialization Wei Yang
2020-07-03 2:06 ` [PATCH 2/5] tracing: simplify the logic by defining next to be "lasst + 1" Wei Yang
2020-07-09 21:59 ` Steven Rostedt
2020-07-03 2:06 ` Wei Yang [this message]
2020-07-09 22:04 ` [PATCH 3/5] tracing: save one trace_event->type by using __TRACE_LAST_TYPE Steven Rostedt
2020-07-03 2:06 ` [PATCH 4/5] tracing: use NULL directly to create root level tracefs Wei Yang
2020-07-03 2:06 ` [PATCH 5/5] tracing: toplevel d_entry already initialized Wei Yang
2020-07-09 22:13 ` Steven Rostedt
2020-07-10 1:11 ` Wei Yang
2020-07-10 13:08 ` Steven Rostedt
2020-07-09 21:57 ` [PATCH 1/5] tracing: use union to simplify the trace_event_functions initialization Steven Rostedt
2020-07-10 1:10 ` Wei Yang
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