From patchwork Sun Sep 20 11:26:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julia Lawall X-Patchwork-Id: 11787579 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 887FB6CB for ; Sun, 20 Sep 2020 12:16:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 709FB20EDD for ; Sun, 20 Sep 2020 12:16:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726342AbgITMQT (ORCPT ); Sun, 20 Sep 2020 08:16:19 -0400 Received: from mail2-relais-roc.national.inria.fr ([192.134.164.83]:33987 "EHLO mail2-relais-roc.national.inria.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726273AbgITMQS (ORCPT ); Sun, 20 Sep 2020 08:16:18 -0400 X-Greylist: delayed 428 seconds by postgrey-1.27 at vger.kernel.org; Sun, 20 Sep 2020 08:16:17 EDT X-IronPort-AV: E=Sophos;i="5.77,282,1596492000"; d="scan'208";a="468612188" 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: "Martin K. Petersen" Cc: kernel-janitors@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 02/14] target/rd: drop double zeroing Date: Sun, 20 Sep 2020 13:26:14 +0200 Message-Id: <1600601186-7420-3-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: target-devel@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(*x),flags) ... sg_init_table(x,n) // Signed-off-by: Julia Lawall --- drivers/target/target_core_rd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -u -p a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c --- a/drivers/target/target_core_rd.c +++ b/drivers/target/target_core_rd.c @@ -131,7 +131,7 @@ static int rd_allocate_sgl_table(struct if (sg_per_table < total_sg_needed) chain_entry = 1; - sg = kcalloc(sg_per_table + chain_entry, sizeof(*sg), + sg = kmalloc_array(sg_per_table + chain_entry, sizeof(*sg), GFP_KERNEL); if (!sg) return -ENOMEM;