[for-linus][PATCH 04/15] tracing: Modify print_fields() for fields output order

[Steven Rostedt]

From: sunliming <sunliming@xxxxxxxxxx>

Now the print_fields() print trace event fields in reverse order. Modify
it to the positive sequence.

Example outputs for a user event:
	test0 u32 count1; u32 count2

Output before:
	example-2547    [000] .....   325.666387: test0: count2=0x2 (2) count1=0x1 (1)

Output after:
	example-2742    [002] .....   429.769370: test0: count1=0x1 (1) count2=0x2 (2)

Link: https://lore.kernel.org/linux-trace-kernel/20230525085232.5096-1-sunliming@xxxxxxxxxx

Fixes: 80a76994b2d88 ("tracing: Add "fields" option to show raw trace event fields")
Signed-off-by: sunliming <sunliming@xxxxxxxxxx>
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
---
 kernel/trace/trace_output.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 15f05faaae44..1e33f367783e 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -847,7 +847,7 @@ static void print_fields(struct trace_iterator *iter, struct trace_event_call *c
 	int ret;
 	void *pos;
 
-	list_for_each_entry(field, head, link) {
+	list_for_each_entry_reverse(field, head, link) {
 		trace_seq_printf(&iter->seq, " %s=", field->name);
 		if (field->offset + field->size > iter->ent_size) {
 			trace_seq_puts(&iter->seq, "<OVERFLOW>");
-- 
2.39.2