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[91.189.95.16]) by mx.google.com with ESMTP id is14si12668681bkc.30.2012.08.28.04.44.07; Tue, 28 Aug 2012 04:44:11 -0700 (PDT) Received-SPF: neutral (google.com: 91.189.95.16 is neither permitted nor denied by best guess record for domain of linaro-mm-sig-bounces@lists.linaro.org) client-ip=91.189.95.16; Authentication-Results: mx.google.com; spf=neutral (google.com: 91.189.95.16 is neither permitted nor denied by best guess record for domain of linaro-mm-sig-bounces@lists.linaro.org) smtp.mail=linaro-mm-sig-bounces@lists.linaro.org Received: from localhost ([127.0.0.1] helo=mombin.canonical.com) by mombin.canonical.com with esmtp (Exim 4.71) (envelope-from ) id 1T6KDF-0006C1-5A; Tue, 28 Aug 2012 11:44:05 +0000 Received: from hqemgate03.nvidia.com ([216.228.121.140]) by mombin.canonical.com with esmtp (Exim 4.71) (envelope-from ) id 1T6KDE-0006BH-7U for linaro-mm-sig@lists.linaro.org; Tue, 28 Aug 2012 11:44:04 +0000 Received: from hqnvupgp07.nvidia.com (Not Verified[216.228.121.13]) by hqemgate03.nvidia.com id ; Tue, 28 Aug 2012 04:45:22 -0700 Received: from hqemhub03.nvidia.com ([172.17.108.22]) by hqnvupgp07.nvidia.com (PGP Universal service); Tue, 28 Aug 2012 04:37:52 -0700 X-PGP-Universal: processed; by hqnvupgp07.nvidia.com on Tue, 28 Aug 2012 04:37:52 -0700 Received: from hqnvemgw02.nvidia.com (172.16.227.111) by HQEMHUB03.nvidia.com (172.20.150.15) with Microsoft SMTP Server id 8.3.264.0; Tue, 28 Aug 2012 04:44:01 -0700 Received: from daphne.nvidia.com (Not Verified[172.16.212.96]) by hqnvemgw02.nvidia.com with MailMarshal (v6,7,2,8378) id ; Tue, 28 Aug 2012 04:44:08 -0700 Received: from oreo.Nvidia.com (dhcp-10-21-25-186.nvidia.com [10.21.25.186]) by daphne.nvidia.com (8.13.8+Sun/8.8.8) with ESMTP id q7SBhw8r007357; Tue, 28 Aug 2012 04:43:59 -0700 (PDT) From: Hiroshi Doyu To: Date: Tue, 28 Aug 2012 14:43:49 +0300 Message-ID: <1346154232-13299-1-git-send-email-hdoyu@nvidia.com> X-Mailer: git-send-email 1.7.5.4 MIME-Version: 1.0 Cc: linaro-mm-sig@lists.linaro.org, linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [Linaro-mm-sig] [PATCH 1/4] ARM: dma-mapping: Small logical clean up X-BeenThere: linaro-mm-sig@lists.linaro.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: "Unified memory management interest group." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linaro-mm-sig-bounces@lists.linaro.org Errors-To: linaro-mm-sig-bounces@lists.linaro.org X-Gm-Message-State: ALoCoQmycfZaxDM/rsw7cFRbStlYKtElIzJnzLnctPxpYuwXR2DIopj+llTVAVLXgxJ0LxjAF5Xh Skip unnecessary operations if order == 0. A little bit easier to read. Signed-off-by: Hiroshi Doyu --- arch/arm/mm/dma-mapping.c | 9 +++++---- 1 files changed, 5 insertions(+), 4 deletions(-) diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 70a6275..aaea5e4 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -1032,11 +1032,12 @@ static struct page **__iommu_alloc_buffer(struct device *dev, size_t size, gfp_t if (!pages[i]) goto error; - if (order) + if (order) { split_page(pages[i], order); - j = 1 << order; - while (--j) - pages[i + j] = pages[i] + j; + j = 1 << order; + while (--j) + pages[i + j] = pages[i] + j; + } __dma_clear_buffer(pages[i], PAGE_SIZE << order); i += 1 << order;