From patchwork Thu Feb 12 07:42:16 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhaolei X-Patchwork-Id: 5817981 Return-Path: X-Original-To: patchwork-linux-btrfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 8A3F29F37F for ; Thu, 12 Feb 2015 07:43:33 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B1AA3200F4 for ; Thu, 12 Feb 2015 07:43:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C34AA20160 for ; Thu, 12 Feb 2015 07:43:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755288AbbBLHn3 (ORCPT ); Thu, 12 Feb 2015 02:43:29 -0500 Received: from cn.fujitsu.com ([59.151.112.132]:35208 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1755157AbbBLHn0 (ORCPT ); Thu, 12 Feb 2015 02:43:26 -0500 X-IronPort-AV: E=Sophos;i="5.04,848,1406563200"; d="scan'208";a="57490446" Received: from localhost (HELO edo.cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 12 Feb 2015 15:39:51 +0800 Received: from G08CNEXCHPEKD03.g08.fujitsu.local (localhost.localdomain [127.0.0.1]) by edo.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id t1C7gdRU016518 for ; Thu, 12 Feb 2015 15:42:39 +0800 Received: from localhost.localdomain (10.167.226.114) by G08CNEXCHPEKD03.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server id 14.3.181.6; Thu, 12 Feb 2015 15:43:29 +0800 From: Zhaolei To: CC: Zhao Lei Subject: [PATCH 3/3] btrfs: cleanup: use for() loop in btrfs_map_bio() Date: Thu, 12 Feb 2015 15:42:16 +0800 Message-ID: <1423726936-7784-1-git-send-email-zhaolei@cn.fujitsu.com> X-Mailer: git-send-email 1.8.5.1 MIME-Version: 1.0 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Zhao Lei for() is obviously better in these code block, and remove noused init-value to reduce about 6 bytes binary size. Signed-off-by: Zhao Lei Reviewed-by: David Sterba --- fs/btrfs/volumes.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index e86f4ca..46d07b9 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -5812,8 +5812,8 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, u64 map_length; u64 *raid_map = NULL; int ret; - int dev_nr = 0; - int total_devs = 1; + int dev_nr; + int total_devs; struct btrfs_bio *bbio = NULL; length = bio->bi_iter.bi_size; @@ -5856,11 +5856,10 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, BUG(); } - while (dev_nr < total_devs) { + for (dev_nr = 0; dev_nr < total_devs; dev_nr++) { dev = bbio->stripes[dev_nr].dev; if (!dev || !dev->bdev || (rw & WRITE && !dev->writeable)) { bbio_error(bbio, first_bio, logical); - dev_nr++; continue; } @@ -5873,7 +5872,6 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, ret = breakup_stripe_bio(root, bbio, first_bio, dev, dev_nr, rw, async_submit); BUG_ON(ret); - dev_nr++; continue; } @@ -5888,7 +5886,6 @@ int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, submit_stripe_bio(root, bbio, bio, bbio->stripes[dev_nr].physical, dev_nr, rw, async_submit); - dev_nr++; } btrfs_bio_counter_dec(root->fs_info); return 0;