From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S939697AbdEXLGv (ORCPT ); Wed, 24 May 2017 07:06:51 -0400 Received: from foss.arm.com ([217.140.101.70]:35904 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S968172AbdEXKZi (ORCPT ); Wed, 24 May 2017 06:25:38 -0400 From: Vladimir Murzin To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, linux@armlinux.org.uk, sza@esh.hu, arnd@arndb.de, gregkh@linuxfoundation.org, akpm@linux-foundation.org, alexandre.torgue@st.com, robin.murphy@arm.com, benjamin.gaignard@linaro.org, kbuild-all@01.org Subject: [PATCH v5 7/7] ARM: dma-mapping: Remove traces of NOMMU code Date: Wed, 24 May 2017 11:24:32 +0100 Message-Id: <1495621472-9323-8-git-send-email-vladimir.murzin@arm.com> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1495621472-9323-1-git-send-email-vladimir.murzin@arm.com> References: <1495621472-9323-1-git-send-email-vladimir.murzin@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org DMA operations for NOMMU case have been just factored out into separate compilation unit, so don't keep dead code. Tested-by: Benjamin Gaignard Tested-by: Andras Szemzo Tested-by: Alexandre TORGUE Signed-off-by: Vladimir Murzin Acked-by: Arnd Bergmann --- arch/arm/mm/dma-mapping.c | 29 ++--------------------------- 1 file changed, 2 insertions(+), 27 deletions(-) diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index c742dfd..395fa01 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, @@ -647,22 +645,6 @@ 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, gfp) 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) { @@ -805,7 +787,7 @@ 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; @@ -854,8 +836,7 @@ 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); @@ -870,10 +851,6 @@ static int __arm_dma_mmap(struct device *dev, struct vm_area_struct *vma, vma->vm_end - vma->vm_start, vma->vm_page_prot); } -#else - ret = vm_iomap_memory(vma, vma->vm_start, - (vma->vm_end - vma->vm_start)); -#endif /* CONFIG_MMU */ return ret; } @@ -892,9 +869,7 @@ 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); } -- 2.0.0