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tracing: Modify print_fields() for fields output order 

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@kylinos.cn

Fixes: 80a76994b2 ("tracing: Add "fields" option to show raw trace event fields")
Signed-off-by: sunliming <sunliming@kylinos.cn>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
sunliming 2023-05-25 16:52:32 +08:00 committed by Steven Rostedt (Google)
parent cfac4ed727
commit e70bb54d7a
1 changed files with 1 additions and 1 deletions
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2
kernel/trace/trace_output.c
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@ -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>");