[for-next][PATCH 18/21] tracing: Use WARN instead of printk and WARN_ON

Steven Rostedt
2022-04-27T19:38:18Z

From: Guo Zhengkui <guozhengkui@vivo.com>

Use `WARN(cond, ...)` instead of `if (cond)` + `printk(...)` +
`WARN_ON(1)`.

Link: https://lkml.kernel.org/r/20220424131932.3606-1-guozhengkui@vivo.com

Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Guo Zhengkui <guozhengkui@vivo.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
kernel/trace/trace_output.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 8aa493d25c73..d89e3f7e26eb 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -778,9 +778,8 @@ int register_trace_event(struct trace_event *event)

list_add_tail(&event->list, list);

- } else if (event->type > __TRACE_LAST_TYPE) {
- printk(KERN_WARNING "Need to add type to trace.h\n");
- WARN_ON(1);
+ } else if (WARN(event->type > __TRACE_LAST_TYPE,
+ "Need to add type to trace.h")) {
goto out;
} else {
/* Is this event already used */
@@ -1571,13 +1570,8 @@ __init static int init_events(void)

for (i = 0; events[i]; i++) {
event = events[i];
-
ret = register_trace_event(event);
- if (!ret) {
- printk(KERN_WARNING "event %d failed to register\n",
- event->type);
- WARN_ON_ONCE(1);
- }
+ WARN_ONCE(!ret, "event %d failed to register", event->type);
}

return 0;
--
2.35.1