Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752756AbcD2UYc (ORCPT ); Fri, 29 Apr 2016 16:24:32 -0400 Received: from mail3-relais-sop.national.inria.fr ([192.134.164.104]:17635 "EHLO mail3-relais-sop.national.inria.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751045AbcD2UYb (ORCPT ); Fri, 29 Apr 2016 16:24:31 -0400 X-IronPort-AV: E=Sophos;i="5.24,553,1454972400"; d="scan'208";a="176255464" From: Julia Lawall To: Dan Williams Cc: kernel-janitors@vger.kernel.org, Vinod Koul , dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/5] dmaengine: mmp_pdma: Use dma_pool_zalloc Date: Fri, 29 Apr 2016 22:09:08 +0200 Message-Id: <1461960552-7429-2-git-send-email-Julia.Lawall@lip6.fr> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1461960552-7429-1-git-send-email-Julia.Lawall@lip6.fr> References: <1461960552-7429-1-git-send-email-Julia.Lawall@lip6.fr> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1152 Lines: 42 Dma_pool_zalloc combines dma_pool_alloc and memset 0. The semantic patch that makes this transformation is as follows: (http://coccinelle.lip6.fr/) // @@ expression d,e; statement S; @@ d = - dma_pool_alloc + dma_pool_zalloc (...); if (!d) S - memset(d, 0, sizeof(*d)); // Signed-off-by: Julia Lawall --- drivers/dma/mmp_pdma.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c index e39457f..56f1fd6 100644 --- a/drivers/dma/mmp_pdma.c +++ b/drivers/dma/mmp_pdma.c @@ -364,13 +364,12 @@ mmp_pdma_alloc_descriptor(struct mmp_pdma_chan *chan) struct mmp_pdma_desc_sw *desc; dma_addr_t pdesc; - desc = dma_pool_alloc(chan->desc_pool, GFP_ATOMIC, &pdesc); + desc = dma_pool_zalloc(chan->desc_pool, GFP_ATOMIC, &pdesc); if (!desc) { dev_err(chan->dev, "out of memory for link descriptor\n"); return NULL; } - memset(desc, 0, sizeof(*desc)); INIT_LIST_HEAD(&desc->tx_list); dma_async_tx_descriptor_init(&desc->async_tx, &chan->chan); /* each desc has submit */