Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Masami Hiramatsu <mhiramat@kernel.org>
To:     Steven Rostedt <rostedt@goodmis.org>
Cc:     Ingo Molnar <mingo@redhat.com>,
        Frank Rowand <frowand.list@gmail.com>,
        Randy Dunlap <rdunlap@infradead.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Tim Bird <Tim.Bird@sony.com>, Jiri Olsa <jolsa@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Tom Zanussi <tom.zanussi@linux.intel.com>,
        Rob Herring <robh+dt@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Alexey Dobriyan <adobriyan@gmail.com>,
        Jonathan Corbet <corbet@lwn.net>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH v6 13/22] tracing: Accept different type for synthetic event fields
Date:   Sat, 11 Jan 2020 01:05:53 +0900
Message-Id: <157867235358.17873.61732996461602171.stgit@devnote2>
In-Reply-To: <157867220019.17873.13377985653744804396.stgit@devnote2>
References: <157867220019.17873.13377985653744804396.stgit@devnote2>
User-Agent: StGit/0.17.1-dirty
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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 f62de5f43e79..dae2c25b209a 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;
 }