linux-kernel - [PATCH] tracing: Use trace_iterator_reset() in tracing_read

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Message-ID: <20211210202616.64d432d2@gandalf.local.home>
Date:   Fri, 10 Dec 2021 20:26:16 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Xiu Jianfeng <xiujianfeng@...wei.com>
Subject: [PATCH] tracing: Use trace_iterator_reset() in tracing_read_pipe()

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

Currently tracing_read_pipe() open codes trace_iterator_reset(). Just have
it use trace_iterator_reset() instead.

Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
---
 kernel/trace/trace.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 588de6df473f..547d82628c2e 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -6731,10 +6731,9 @@ tracing_read_pipe(struct file *filp, char __user *ubuf,
 		cnt = PAGE_SIZE - 1;
 
 	/* reset all but tr, trace, and overruns */
-	memset_startat(iter, 0, seq);
+	trace_iterator_reset(iter);
 	cpumask_clear(iter->started);
 	trace_seq_init(&iter->seq);
-	iter->pos = -1;
 
 	trace_event_read_lock();
 	trace_access_lock(iter->cpu_file);
-- 
2.31.1