Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932885AbbENLja (ORCPT ); Thu, 14 May 2015 07:39:30 -0400 Received: from szxga03-in.huawei.com ([119.145.14.66]:21295 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932434AbbENLjZ (ORCPT ); Thu, 14 May 2015 07:39:25 -0400 From: Wang Long To: , , CC: , , , , , , , , , Subject: [RFC PATCH 04/17] tracing: Add a seq_buf_clear() helper and clear len and readpos in init Date: Thu, 14 May 2015 11:34:51 +0000 Message-ID: <1431603304-162571-5-git-send-email-long.wanglong@huawei.com> X-Mailer: git-send-email 1.8.3.4 In-Reply-To: <1431603304-162571-1-git-send-email-long.wanglong@huawei.com> References: <1431603304-162571-1-git-send-email-long.wanglong@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.107.197.200] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020206.5554888B.0256,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2013-05-26 15:14:31, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: dca77b1a111a23241577bf33afd18334 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1497 Lines: 53 From: "Steven Rostedt (Red Hat)" 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 Acked-by: Jiri Kosina Reviewed-by: Petr Mladek [wanglong: backport to 3.10 stable] Signed-off-by: Wang Long Signed-off-by: Steven Rostedt --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/