linux-kernel - [PATCH -next] trace.h: Use memset_startat helper in trace_iterator

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Date:   Fri, 10 Dec 2021 09:22:45 +0800
From:   Xiu Jianfeng <xiujianfeng@...wei.com>
To:     <rostedt@...dmis.org>, <mingo@...hat.com>,
        <miguel.ojeda.sandonis@...il.com>
CC:     <linux-kernel@...r.kernel.org>, <wangweiyang2@...wei.com>
Subject: [PATCH -next] trace.h: Use memset_startat helper in trace_iterator_reset

Make use of memset_startat helper to simplify the code, there should be
no functional change as a result of this patch.

Signed-off-by: Xiu Jianfeng <xiujianfeng@...wei.com>
---
 kernel/trace/trace.h | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 38715aa6cfdf..cde9c0710317 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -1926,14 +1926,7 @@ extern struct trace_iterator *tracepoint_print_iter;
  */
 static __always_inline void trace_iterator_reset(struct trace_iterator *iter)
 {
-	const size_t offset = offsetof(struct trace_iterator, seq);
-
-	/*
-	 * Keep gcc from complaining about overwriting more than just one
-	 * member in the structure.
-	 */
-	memset((char *)iter + offset, 0, sizeof(struct trace_iterator) - offset);
-
+	memset_startat(iter, 0, seq);
 	iter->pos = -1;
 }
 
-- 
2.17.1