[RFC PATCH v4 13/22] tracing: Accept different type for synthetic event fields

Masami Hiramatsu
2019-12-02T10:15:51Z

Make the synthetic event accepts a different type field to record.
However, the size and signed flag must be same.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
kernel/trace/trace_events_hist.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index f49d1a36d3ae..06d91bb59297 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -4091,8 +4091,11 @@ static int check_synth_field(struct synth_event *event,

field = event->fields[field_pos];

- if (strcmp(field->type, hist_field->type) != 0)
- return -EINVAL;
+ if (strcmp(field->type, hist_field->type) != 0) {
+ if (field->size != hist_field->size ||
+ field->is_signed != hist_field->is_signed)
+ return -EINVAL;
+ }

return 0;
}