From patchwork Wed Jan 18 11:13:23 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vladimir Murzin X-Patchwork-Id: 9523373 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 3B2EA6020A for ; Wed, 18 Jan 2017 11:15:49 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2DD8C28428 for ; Wed, 18 Jan 2017 11:15:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 22C562849E; Wed, 18 Jan 2017 11:15:49 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 97C7528428 for ; Wed, 18 Jan 2017 11:15:48 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cToDT-0004Jp-2g; Wed, 18 Jan 2017 11:15:47 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cToCa-0001OG-CW for linux-arm-kernel@lists.infradead.org; Wed, 18 Jan 2017 11:14:55 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1F65C15B2; Wed, 18 Jan 2017 03:14:24 -0800 (PST) Received: from bc-a9-1-9.euhpc.arm.com. (bc-a9-1-9.euhpc.arm.com [10.6.3.81]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id F18483F3D6; Wed, 18 Jan 2017 03:14:22 -0800 (PST) From: Vladimir Murzin To: linux-arm-kernel@lists.infradead.org Subject: [RFC PATCH v5 7/7] ARM: dma-mapping: Remove traces of NOMMU code Date: Wed, 18 Jan 2017 11:13:23 +0000 Message-Id: <1484738003-29892-8-git-send-email-vladimir.murzin@arm.com> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1484738003-29892-1-git-send-email-vladimir.murzin@arm.com> References: <1484738003-29892-1-git-send-email-vladimir.murzin@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170118_031452_653661_7FA300FC X-CRM114-Status: GOOD ( 10.38 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alexandre.torgue@st.com, linux@armlinux.org.uk, kbuild-all@01.org, benjamin.gaignard@linaro.org, robin.murphy@arm.com, sza@esh.hu MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP DMA operations for NOMMU case have been just factored out into separate compilation unit, so don't keep dead code. Signed-off-by: Vladimir Murzin --- arch/arm/mm/dma-mapping.c | 26 ++------------------------ 1 file changed, 2 insertions(+), 24 deletions(-) diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index ab77100..d8a755b 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -344,8 +344,6 @@ static void __dma_free_buffer(struct page *page, size_t size) } } -#ifdef CONFIG_MMU - static void *__alloc_from_contiguous(struct device *dev, size_t size, pgprot_t prot, struct page **ret_page, const void *caller, bool want_vaddr, @@ -646,22 +644,6 @@ static inline pgprot_t __get_dma_pgprot(unsigned long attrs, pgprot_t prot) return prot; } -#define nommu() 0 - -#else /* !CONFIG_MMU */ - -#define nommu() 1 - -#define __get_dma_pgprot(attrs, prot) __pgprot(0) -#define __alloc_remap_buffer(dev, size, gfp, prot, ret, c, wv) NULL -#define __alloc_from_pool(size, ret_page) NULL -#define __alloc_from_contiguous(dev, size, prot, ret, c, wv, coherent_flag) NULL -#define __free_from_pool(cpu_addr, size) do { } while (0) -#define __free_from_contiguous(dev, page, cpu_addr, size, wv) do { } while (0) -#define __dma_free_remap(cpu_addr, size) do { } while (0) - -#endif /* CONFIG_MMU */ - static void *__alloc_simple_buffer(struct device *dev, size_t size, gfp_t gfp, struct page **ret_page) { @@ -803,7 +785,7 @@ static void *__dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, if (cma) buf->allocator = &cma_allocator; - else if (nommu() || is_coherent) + else if (is_coherent) buf->allocator = &simple_allocator; else if (allowblock) buf->allocator = &remap_allocator; @@ -852,8 +834,7 @@ static int __arm_dma_mmap(struct device *dev, struct vm_area_struct *vma, void *cpu_addr, dma_addr_t dma_addr, size_t size, unsigned long attrs) { - int ret = -ENXIO; -#ifdef CONFIG_MMU + int ret; unsigned long nr_vma_pages = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT; unsigned long pfn = dma_to_pfn(dev, dma_addr); @@ -868,7 +849,6 @@ static int __arm_dma_mmap(struct device *dev, struct vm_area_struct *vma, vma->vm_end - vma->vm_start, vma->vm_page_prot); } -#endif /* CONFIG_MMU */ return ret; } @@ -887,9 +867,7 @@ int arm_dma_mmap(struct device *dev, struct vm_area_struct *vma, void *cpu_addr, dma_addr_t dma_addr, size_t size, unsigned long attrs) { -#ifdef CONFIG_MMU vma->vm_page_prot = __get_dma_pgprot(attrs, vma->vm_page_prot); -#endif /* CONFIG_MMU */ return __arm_dma_mmap(dev, vma, cpu_addr, dma_addr, size, attrs); }