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From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Wei Yang <richard.weiyang@linux.alibaba.com>
Subject: [for-linus][PATCH 02/17] tracing: Save one trace_event->type by using __TRACE_LAST_TYPE
Date: Tue, 04 Aug 2020 16:57:45 -0400	[thread overview]
Message-ID: <20200804205812.216460366@goodmis.org> (raw)
In-Reply-To: 20200804205743.419135730@goodmis.org

From: Wei Yang <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.

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>
---
 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 a35232d61601..4d1893564912 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;
-- 
2.26.2



  parent reply	other threads:[~2020-08-04 20:58 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-04 20:57 [for-linus][PATCH 00/17] tracing: Last minute fixes for this merge window Steven Rostedt
2020-08-04 20:57 ` [for-linus][PATCH 01/17] tracing: Simplify defining of the next event id Steven Rostedt
2020-08-04 20:57 ` Steven Rostedt [this message]
2020-08-04 20:57 ` [for-linus][PATCH 03/17] tracing/hwlat: Drop the duplicate assignment in start_kthread() Steven Rostedt
2020-08-04 20:57 ` [for-linus][PATCH 04/17] tracing/hwlat: Honor the tracing_cpumask Steven Rostedt
2020-08-04 20:57 ` [for-linus][PATCH 05/17] ftrace: Setup correct FTRACE_FL_REGS flags for module Steven Rostedt
2020-08-09 15:53   ` Sasha Levin
2020-08-04 20:57 ` [for-linus][PATCH 06/17] ftrace: Do not let direct or IPMODIFY ftrace_ops be added to module and set trampolines Steven Rostedt
2020-08-04 20:57 ` [for-linus][PATCH 07/17] tracing: Remove outdated comment in stack handling Steven Rostedt
2020-08-04 20:57 ` [for-linus][PATCH 09/17] tracepoint: Mark __tracepoint_strings __used Steven Rostedt
2020-08-04 20:57 ` [for-linus][PATCH 10/17] tracepoint: Use __used attribute definitions from compiler_attributes.h Steven Rostedt
2020-08-04 20:57 ` [for-linus][PATCH 11/17] ftrace: Fix ftrace_trace_task return value Steven Rostedt
2020-08-04 20:57 ` [for-linus][PATCH 12/17] kprobes: Fix NULL pointer dereference at kprobe_ftrace_handler Steven Rostedt
2020-08-04 20:57 ` [for-linus][PATCH 13/17] tracing/uprobe: Remove dead code in trace_uprobe_register() Steven Rostedt
2020-08-04 20:57 ` [for-linus][PATCH 14/17] kprobes: Remove show_registers() function prototype Steven Rostedt
2020-08-04 20:57 ` [for-linus][PATCH 15/17] lib/bootconfig: Add override operator support Steven Rostedt
2020-08-04 20:57 ` [for-linus][PATCH 16/17] tools/bootconfig: Add testcases for value override operator Steven Rostedt
2020-08-04 20:58 ` [for-linus][PATCH 17/17] Documentation: bootconfig: Add bootconfig " Steven Rostedt

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