[RFC PATCH v2 05/15] tracing: Accept different type for synthetic event fields

[Masami Hiramatsu]

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 <mhira...@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 ca6b0dff60c5..a7f447195143 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -4063,8 +4063,11 @@ 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;
 }