From patchwork Thu Mar 19 12:33:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qu Wenruo X-Patchwork-Id: 1258258 X-Patchwork-Delegate: trini@ti.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; helo=phobos.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=suse.com Received: from phobos.denx.de (phobos.denx.de [IPv6:2a01:238:438b:c500:173d:9f52:ddab:ee01]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 48jq0j3LqFz9sTN for ; Fri, 20 Mar 2020 01:24:21 +1100 (AEDT) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id 047F781676; Thu, 19 Mar 2020 15:24:05 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=suse.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Received: by phobos.denx.de (Postfix, from userid 109) id 74B6681218; Thu, 19 Mar 2020 13:33:30 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on phobos.denx.de X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.2 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id 7BD7681286 for ; Thu, 19 Mar 2020 13:33:27 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=suse.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=wqu@suse.com Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 45F56ACEF; Thu, 19 Mar 2020 12:33:27 +0000 (UTC) From: Qu Wenruo To: u-boot@lists.denx.de Cc: linux-btrfs@vger.kernel.org Subject: [PATCH 1/2] uboot: fs/btrfs: Use LZO_LEN to replace immediate number Date: Thu, 19 Mar 2020 20:33:18 +0800 Message-Id: <20200319123319.37848-2-wqu@suse.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200319123319.37848-1-wqu@suse.com> References: <20200319123319.37848-1-wqu@suse.com> MIME-Version: 1.0 X-Mailman-Approved-At: Thu, 19 Mar 2020 15:23:58 +0100 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.30rc1 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.102.2 at phobos.denx.de X-Virus-Status: Clean Just a cleanup. The immediate number makes my eye hurt. Signed-off-by: Qu Wenruo --- fs/btrfs/compression.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index 346875d45a1b..4ef44ce11485 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -12,36 +12,38 @@ #include #include +/* Header for each segment, LE32, recording the compressed size */ +#define LZO_LEN 4 static u32 decompress_lzo(const u8 *cbuf, u32 clen, u8 *dbuf, u32 dlen) { u32 tot_len, in_len, res; size_t out_len; int ret; - if (clen < 4) + if (clen < LZO_LEN) return -1; tot_len = le32_to_cpu(get_unaligned((u32 *)cbuf)); - cbuf += 4; - clen -= 4; - tot_len -= 4; + cbuf += LZO_LEN; + clen -= LZO_LEN; + tot_len -= LZO_LEN; if (tot_len == 0 && dlen) return -1; - if (tot_len < 4) + if (tot_len < LZO_LEN) return -1; res = 0; - while (tot_len > 4) { + while (tot_len > LZO_LEN) { in_len = le32_to_cpu(get_unaligned((u32 *)cbuf)); - cbuf += 4; - clen -= 4; + cbuf += LZO_LEN; + clen -= LZO_LEN; - if (in_len > clen || tot_len < 4 + in_len) + if (in_len > clen || tot_len < LZO_LEN + in_len) return -1; - tot_len -= 4 + in_len; + tot_len -= (LZO_LEN + in_len); out_len = dlen; ret = lzo1x_decompress_safe(cbuf, in_len, dbuf, &out_len);