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Message-ID: <1431603304-162571-5-git-send-email-long.wanglong@huawei.com>
Date: Thu, 14 May 2015 11:34:51 +0000
From: Wang Long <long.wanglong@...wei.com>
To: <rostedt@...dmis.org>, <jkosina@...e.cz>,
<gregkh@...uxfoundation.org>
CC: <stable@...r.kernel.org>, <wanglong@...qinren.net>,
<peifeiyue@...wei.com>, <linux-kernel@...r.kernel.org>,
<morgan.wang@...wei.com>, <paulmck@...ux.vnet.ibm.com>,
<pmladek@...e.cz>, <dzickus@...hat.com>, <x86@...nel.org>,
<sasha.levin@...cle.com>
Subject: [RFC PATCH 04/17] tracing: Add a seq_buf_clear() helper and clear len and readpos in init
From: "Steven Rostedt (Red Hat)" <rostedt@...dmis.org>
commit 0736c033a81547b1cdc5120fc8dd60e26a00fd28 upstream.
Add a helper function seq_buf_clear() that resets the len and readpos
fields of a seq_buf. Currently it is only used in the seq_buf_init()
but will be used later when updating the seq_file code.
Link: http://lkml.kernel.org/r/20141104160222.352309995@goodmis.org
Tested-by: Jiri Kosina <jkosina@...e.cz>
Acked-by: Jiri Kosina <jkosina@...e.cz>
Reviewed-by: Petr Mladek <pmladek@...e.cz>
[wanglong: backport to 3.10 stable]
Signed-off-by: Wang Long <long.wanglong@...wei.com>
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
---
include/linux/seq_buf.h | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/include/linux/seq_buf.h b/include/linux/seq_buf.h
index d14dc90..5d91262 100644
--- a/include/linux/seq_buf.h
+++ b/include/linux/seq_buf.h
@@ -22,13 +22,18 @@ struct seq_buf {
loff_t readpos;
};
+static inline void seq_buf_clear(struct seq_buf *s)
+{
+ s->len = 0;
+ s->readpos = 0;
+}
+
static inline void
seq_buf_init(struct seq_buf *s, unsigned char *buf, unsigned int size)
{
s->buffer = buf;
s->size = size;
- s->len = 0;
- s->readpos = 0;
+ seq_buf_clear(s);
}
/*
--
1.8.3.4
--
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