From patchwork Tue Jun 7 18:40:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Battersby X-Patchwork-Id: 12872233 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 47DC5C43334 for ; Tue, 7 Jun 2022 18:40:30 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D684D6B007E; Tue, 7 Jun 2022 14:40:29 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D174B6B0080; Tue, 7 Jun 2022 14:40:29 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id BDFC56B0081; Tue, 7 Jun 2022 14:40:29 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id AE09B6B007E for ; Tue, 7 Jun 2022 14:40:29 -0400 (EDT) Received: from smtpin25.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay12.hostedemail.com (Postfix) with ESMTP id 6009C1210FB for ; Tue, 7 Jun 2022 18:40:29 +0000 (UTC) X-FDA: 79552305378.25.3443CE4 Received: from mail.cybernetics.com (mail.cybernetics.com [173.71.130.66]) by imf08.hostedemail.com (Postfix) with ESMTP id A6638160003 for ; Tue, 7 Jun 2022 18:39:59 +0000 (UTC) X-ASG-Debug-ID: 1654627227-1cf43917f3396520001-v9ZeMO Received: from cybernetics.com ([10.10.4.126]) by mail.cybernetics.com with ESMTP id 7q8f4i5VB5tulwTq; Tue, 07 Jun 2022 14:40:27 -0400 (EDT) X-Barracuda-Envelope-From: tonyb@cybernetics.com X-ASG-Whitelist: Client DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=cybernetics.com; s=mail; bh=cPbWsHAkkEQ/IV9PNOMIz+rmz60KjJDA9BYZCB0e3iI=; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:References:Cc:To:From: Content-Language:Subject:MIME-Version:Date:Message-ID; b=J61v7CvSfK8dXjZ+w6d6 8xsL1vF77oaGreuBYU7E3kJZx8xX3v0D3QVShQw+LlGqoqmzsxMRHMWmX0lcshWXQX6z4NcKT9bI+ q8x408aTjLn4GMLHAA6WESTFy6mRrWzbZH1Xax48DUgHMZxC7lO4zW3Q1Hp8lmRcXny/TJ7c6w= Received: from [10.157.2.224] (HELO [192.168.200.1]) by cybernetics.com (CommuniGate Pro SMTP 7.1.1) with ESMTPS id 11859402; Tue, 07 Jun 2022 14:40:26 -0400 Message-ID: <6c627beb-eb61-5baa-484a-e35567f05e89@cybernetics.com> Date: Tue, 7 Jun 2022 14:40:27 -0400 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: [PATCH v6 02/11] dmapool: use sysfs_emit() instead of scnprintf() Content-Language: en-US X-ASG-Orig-Subj: [PATCH v6 02/11] dmapool: use sysfs_emit() instead of scnprintf() From: Tony Battersby To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: iommu@lists.linux-foundation.org, kernel-team@fb.com, Matthew Wilcox , Keith Busch , Andy Shevchenko , Robin Murphy , Tony Lindgren References: <340ff8ef-9ff5-7175-c234-4132bbdfc5f7@cybernetics.com> In-Reply-To: <340ff8ef-9ff5-7175-c234-4132bbdfc5f7@cybernetics.com> X-Barracuda-Connect: UNKNOWN[10.10.4.126] X-Barracuda-Start-Time: 1654627227 X-Barracuda-URL: https://10.10.4.122:443/cgi-mod/mark.cgi X-Barracuda-BRTS-Status: 1 X-Virus-Scanned: by bsmtpd at cybernetics.com X-Barracuda-Scan-Msg-Size: 1630 X-Rspam-User: Authentication-Results: imf08.hostedemail.com; dkim=pass header.d=cybernetics.com header.s=mail header.b=J61v7CvS; dmarc=pass (policy=none) header.from=cybernetics.com; spf=pass (imf08.hostedemail.com: domain of "btv1==15738f5bfcd==tonyb@cybernetics.com" designates 173.71.130.66 as permitted sender) smtp.mailfrom="btv1==15738f5bfcd==tonyb@cybernetics.com" X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: A6638160003 X-Stat-Signature: mq3x987wazjxgdw38pswyiatffk8g8cc X-HE-Tag: 1654627199-934083 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Use sysfs_emit instead of scnprintf, snprintf or sprintf. Signed-off-by: Tony Battersby --- Changes since v5: This patch was not in v5. mm/dmapool.c | 23 +++++++---------------- 1 file changed, 7 insertions(+), 16 deletions(-) diff --git a/mm/dmapool.c b/mm/dmapool.c index 0f89de408cbe..1829291f5d70 100644 --- a/mm/dmapool.c +++ b/mm/dmapool.c @@ -64,18 +64,11 @@ static DEFINE_MUTEX(pools_reg_lock); static ssize_t pools_show(struct device *dev, struct device_attribute *attr, char *buf) { - unsigned temp; - unsigned size; - char *next; + int size; struct dma_page *page; struct dma_pool *pool; - next = buf; - size = PAGE_SIZE; - - temp = scnprintf(next, size, "poolinfo - 0.1\n"); - size -= temp; - next += temp; + size = sysfs_emit(buf, "poolinfo - 0.1\n"); mutex_lock(&pools_lock); list_for_each_entry(pool, &dev->dma_pools, pools) { @@ -90,16 +83,14 @@ static ssize_t pools_show(struct device *dev, struct device_attribute *attr, cha spin_unlock_irq(&pool->lock); /* per-pool info, no real statistics yet */ - temp = scnprintf(next, size, "%-16s %4u %4zu %4zu %2u\n", - pool->name, blocks, - pages * (pool->allocation / pool->size), - pool->size, pages); - size -= temp; - next += temp; + size += sysfs_emit_at(buf, size, "%-16s %4u %4zu %4zu %2u\n", + pool->name, blocks, + pages * (pool->allocation / pool->size), + pool->size, pages); } mutex_unlock(&pools_lock); - return PAGE_SIZE - size; + return size; } static DEVICE_ATTR_RO(pools);