From patchwork Sun Sep 20 11:26:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julia Lawall X-Patchwork-Id: 258056 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 49A20C43463 for ; Sun, 20 Sep 2020 12:16:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 223A521789 for ; Sun, 20 Sep 2020 12:16:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726273AbgITMQd (ORCPT ); Sun, 20 Sep 2020 08:16:33 -0400 Received: from mail2-relais-roc.national.inria.fr ([192.134.164.83]:33993 "EHLO mail2-relais-roc.national.inria.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726380AbgITMQX (ORCPT ); Sun, 20 Sep 2020 08:16:23 -0400 X-IronPort-AV: E=Sophos;i="5.77,282,1596492000"; d="scan'208";a="468612187" Received: from palace.lip6.fr ([132.227.105.202]) by mail2-relais-roc.national.inria.fr with ESMTP/TLS/AES256-SHA256; 20 Sep 2020 14:08:58 +0200 From: Julia Lawall To: Greg Kroah-Hartman Cc: kernel-janitors@vger.kernel.org, Jiri Slaby , linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 01/14] pch_uart: drop double zeroing Date: Sun, 20 Sep 2020 13:26:13 +0200 Message-Id: <1600601186-7420-2-git-send-email-Julia.Lawall@inria.fr> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1600601186-7420-1-git-send-email-Julia.Lawall@inria.fr> References: <1600601186-7420-1-git-send-email-Julia.Lawall@inria.fr> Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org sg_init_table zeroes its first argument, so the allocation of that argument doesn't have to. the semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // @@ expression x,n,flags; @@ x = - kcalloc + kmalloc_array (n,sizeof(struct scatterlist),flags) ... sg_init_table(x,n) // Signed-off-by: Julia Lawall --- drivers/tty/serial/pch_uart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -u -p a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -981,7 +981,7 @@ static unsigned int dma_handle_tx(struct priv->tx_dma_use = 1; - priv->sg_tx_p = kcalloc(num, sizeof(struct scatterlist), GFP_ATOMIC); + priv->sg_tx_p = kmalloc_array(num, sizeof(struct scatterlist), GFP_ATOMIC); if (!priv->sg_tx_p) { dev_err(priv->port.dev, "%s:kzalloc Failed\n", __func__); return 0;