Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755448AbbESJLk (ORCPT ); Tue, 19 May 2015 05:11:40 -0400 Received: from szxga01-in.huawei.com ([58.251.152.64]:16943 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755373AbbESJL2 (ORCPT ); Tue, 19 May 2015 05:11:28 -0400 From: Wang Long To: , , , CC: , , , , , , , , , Subject: [PATCH v2 04/17] tracing: Add a seq_buf_clear() helper and clear len and readpos in init Date: Tue, 19 May 2015 09:08:49 +0000 Message-ID: <1432026542-123571-5-git-send-email-long.wanglong@huawei.com> X-Mailer: git-send-email 1.8.3.4 In-Reply-To: <1432026542-123571-1-git-send-email-long.wanglong@huawei.com> References: <1432026542-123571-1-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 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/