[for-next][PATCH 16/26] tracing: Accept different type for synthetic event fields

[Steven Rostedt]

From: Masami Hiramatsu <mhiramat@xxxxxxxxxx>

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

Link: 157867235358.17873.61732996461602171.stgit@devnote2">http://lkml.kernel.org/r/157867235358.17873.61732996461602171.stgit@devnote2

Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
---
 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 0454abaeb486..4f4759c6e972 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -4110,8 +4110,11 @@ 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;
 }
-- 
2.24.1