linux-kernel - [PATCH 10/13] scsi: iscsi: tracing: Use the new _

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Date:   Tue, 05 Jul 2022 18:45:03 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     linux-kernel@...r.kernel.org
Cc:     Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Fred Herard <fred.herard@...cle.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 10/13] scsi: iscsi: tracing: Use the new __vstring() helper

From: "Steven Rostedt (Google)" <rostedt@...dmis.org>

Instead of open coding a __dynamic_array() with a fixed length (which
defeats the purpose of the dynamic array in the first place). Use the new
__vstring() helper that will use a va_list and only write enough of the
string into the ring buffer that is needed.

Cc: Fred Herard <fred.herard@...cle.com>
Cc: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
---
 include/trace/events/iscsi.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/trace/events/iscsi.h b/include/trace/events/iscsi.h
index 87408faf6e4e..8ff2a3ca5d75 100644
--- a/include/trace/events/iscsi.h
+++ b/include/trace/events/iscsi.h
@@ -26,12 +26,12 @@ DECLARE_EVENT_CLASS(iscsi_log_msg,
 
 	TP_STRUCT__entry(
 		__string(dname, 	dev_name(dev)		)
-		__dynamic_array(char,	msg, ISCSI_MSG_MAX	)
+		__vstring(msg,		vaf->fmt, vaf->va)
 	),
 
 	TP_fast_assign(
 		__assign_str(dname, dev_name(dev));
-		vsnprintf(__get_str(msg), ISCSI_MSG_MAX, vaf->fmt, *vaf->va);
+		__assign_vstr(msg, vaf->fmt, vaf->va);
 	),
 
 	TP_printk("%s: %s",__get_str(dname),  __get_str(msg)
-- 
2.35.1