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Mon, 9 Jul 2018 12:20:18 +0000 (GMT) From: Marek Szyprowski To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, iommu@lists.linux-foundation.org Cc: Marek Szyprowski , Andrew Morton , Michal Nazarewicz , Joonsoo Kim , Vlastimil Babka , Christoph Hellwig , Michal Hocko , Russell King , Catalin Marinas , Will Deacon , Paul Mackerras , Benjamin Herrenschmidt , Chris Zankel , Martin Schwidefsky , Joerg Roedel , Sumit Semwal , Robin Murphy , Laura Abbott , linaro-mm-sig@lists.linaro.org Subject: [PATCH 2/2] dma: remove unsupported gfp_mask parameter from dma_alloc_from_contiguous() Date: Mon, 9 Jul 2018 14:19:56 +0200 X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180709121956.20200-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0VSe0hTURjv3Lv7cDS5zsrTA6KFoj3sSRwyKrPoEL0wKOi97DKlzdluakWU r8o2lR5UYmtaaGrNB8tKbVabrkmBZaVpT0v/sEjzsV40XNuu1X/f7/X9Dh+HJeUn6UlsQuIB XpeoVCtoqeT2w19PZks2xWyb2/1yMTJWmWk0kHGcRF+v5QBkuFpKo/IbDgKVGzJpVHQ/Cp26 VM2gcutPArlefCCQpbudQs/rjTR6Z/ZQyH6+AaDfP0YoVNH0lkHv85ajImcWhS4bf9LINtBD oeGWEwx69HaYQZfS8wD6NNgsWQ5xj81EYLPJDPDz9lYS2z7aaZzzJYvClqGzDNb3vSDwm3Yr jZvzf0vwzeJj+PVIN4nPdZQC/CT/CsB3O9NoXOn+TODyZ63MxglbpUv28uqEFF43Z+luabyx cUNS76KDtuISOg18naUHASzkFsIz7S5KD6SsnCsDsKY/kxCBC8ChiyW0CIYBrDZUkX8jafeK R12lAGZXDUpE8A3ASquF8blobh7U9+n98XFcIYBdtgx/C8n1ULDXo/e7grk9MLsu3b9XwoVC 87d0IHZMhTeqH/j5AG4pLGzykL4w5KwsfF3zlPIJMi4Fll747n0I6xVWwlfvVGI2GH521jDi PAV66goJMZsJ4Mn8AkYEOQDeMtbSoisKNjpbKd8ikouAVfVzRDoamm+ZRvcHwo6+IB9Nesez ty+SIi2D2SfkojsMFjgr/9Xanj4bPReGWQ1ORrzQGQBzrLXkaTC14H9ZEQDXQQifLGhUvDA/ kU+NFJQaITlRFRmn1ViA93s+HnG6akG9e48dcCxQjJUN7F+xTU4pU4RDGjuALKkYJ1Mu9lKy vcpDh3mddpcuWc0LdjCZlShCZDvDj26VcyrlAX4fzyfxur8qwQZMSgOxn7R5bsNHa26AaYHm 6J2g+IgQg7NrYfHEVYbpjjX9odq6aEd0l5CxjmmJitvuzk3oszR9qN68RdVm0TJsSPgUaWh/ oKM1OMGjzm9WDzUEHdkRkz3DJG0BrsLU2LLO3jG553e0ZS6buSbM/X78+mlrtwQOOlbLG+Nj 7qTqKiouKyRCvHLeDFInKP8ASg9v65oDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrBIsWRmVeSWpSXmKPExsVy+t/xe7rMwc7RBkfXmVrMWb+GzeJDUyuz xftlPYwW3YuWs1msXH2UyWJldzObxYL91hadszewW6zc84PJ4suVh0wWmx5fY7W4vGsOm8W9 Nf9ZLQ5N3cto8fv7P1aLtUfuslvc73OwWHC8hdVi7pwfbBYHPzxhtfh8ro3d4tTdz+wWsxv7 GC1efjzB4iDh8eTgPCaPNfPWMHpcvnaR2ePgo0NsHj1vWlg9Nn2axO7R9fYKk8eda3vYPE7M +M3isXlJvcftf4+ZPSbfWM7ocX7GQkaP3Tcb2DzW/XnF5LHy0kX2ALEoPZui/NKSVIWM/OIS W6VoQwsjPUNLCz0jE0s9Q2PzWCsjUyV9O5uU1JzMstQifbsEvYw5h/0LXphVHFyylK2B8b1O FyMnh4SAiUTDviVMXYxcHEICSxkl1t69xQaRkJE4Oa2BFcIWlvhzrYsNougzo8TsrzMZQRJs AoYSXW8hEiICixklPv2/yAriMAt8Y5V4PGsGC0iVsECCxPcNC8HGsgioSqz52gjWzStgK/Hu /hYWiBXyEqs3HGAGsTkF7CTmH/kPZgsB1bS9OcUygZFvASPDKkaR1NLi3PTcYiO94sTc4tK8 dL3k/NxNjMBY3nbs55YdjF3vgg8xCnAwKvHwfih0ihZiTSwrrsw9xCjBwawkwptoBRTiTUms rEotyo8vKs1JLT7EaAp01ERmKdHkfGCaySuJNzQ1NLewNDQ3Njc2s1AS5z1vUBklJJCeWJKa nZpakFoE08fEwSnVwGgWckyvu6FQeQPzPK0jpq9/Xt1h7xtrtvLqPcmXK4/snm31tzGR3fXx jJ0/5KMP8TfvNtR/W/h7/3euTOPgf7pLQ790/Yvz3ua56bqc/MHHixYWTH3jlP1I6tXulLxN 2idL3FVSHCYd/XlYsvB38oTVf1U4RTWMPp2oXZe0WXFv9l2H9dxFezcpsRRnJBpqMRcVJwIA Yashu/sCAAA= Message-Id: <20180709122020eucas1p21a71b092975cb4a3b9954ffc63f699d1~-sqUFoa-h2939329393eucas1p2Y@eucas1p2.samsung.com> X-CMS-MailID: 20180709122020eucas1p21a71b092975cb4a3b9954ffc63f699d1 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20180709122020eucas1p21a71b092975cb4a3b9954ffc63f699d1 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20180709122020eucas1p21a71b092975cb4a3b9954ffc63f699d1 References: <20180709121956.20200-1-m.szyprowski@samsung.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The CMA memory allocator doesn't support standard gfp flags for memory allocation, so there is no point having it as a parameter for dma_alloc_from_contiguous() function. Replace it by a boolean no_warn argument, which covers all the underlaying cma_alloc() function supports. This will help to avoid giving false feeling that this function supports standard gfp flags and callers can pass __GFP_ZERO to get zeroed buffer, what has already been an issue: see commit dd65a941f6ba ("arm64: dma-mapping: clear buffers allocated with FORCE_CONTIGUOUS flag"). Signed-off-by: Marek Szyprowski --- arch/arm/mm/dma-mapping.c | 5 +++-- arch/arm64/mm/dma-mapping.c | 4 ++-- arch/xtensa/kernel/pci-dma.c | 2 +- drivers/iommu/amd_iommu.c | 2 +- drivers/iommu/intel-iommu.c | 3 ++- include/linux/dma-contiguous.h | 4 ++-- kernel/dma/contiguous.c | 7 +++---- kernel/dma/direct.c | 3 ++- 8 files changed, 16 insertions(+), 14 deletions(-) diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index be0fa7e39c26..121c6c3ba9e0 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -594,7 +594,7 @@ static void *__alloc_from_contiguous(struct device *dev, size_t size, struct page *page; void *ptr = NULL; - page = dma_alloc_from_contiguous(dev, count, order, gfp); + page = dma_alloc_from_contiguous(dev, count, order, gfp & __GFP_NOWARN); if (!page) return NULL; @@ -1294,7 +1294,8 @@ static struct page **__iommu_alloc_buffer(struct device *dev, size_t size, unsigned long order = get_order(size); struct page *page; - page = dma_alloc_from_contiguous(dev, count, order, gfp); + page = dma_alloc_from_contiguous(dev, count, order, + gfp & __GFP_NOWARN); if (!page) goto error; diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c index 61e93f0b5482..072c51fb07d7 100644 --- a/arch/arm64/mm/dma-mapping.c +++ b/arch/arm64/mm/dma-mapping.c @@ -355,7 +355,7 @@ static int __init atomic_pool_init(void) if (dev_get_cma_area(NULL)) page = dma_alloc_from_contiguous(NULL, nr_pages, - pool_size_order, GFP_KERNEL); + pool_size_order, false); else page = alloc_pages(GFP_DMA32, pool_size_order); @@ -573,7 +573,7 @@ static void *__iommu_alloc_attrs(struct device *dev, size_t size, struct page *page; page = dma_alloc_from_contiguous(dev, size >> PAGE_SHIFT, - get_order(size), gfp); + get_order(size), gfp & __GFP_NOWARN); if (!page) return NULL; diff --git a/arch/xtensa/kernel/pci-dma.c b/arch/xtensa/kernel/pci-dma.c index ba4640cc0093..b2c7ba91fb08 100644 --- a/arch/xtensa/kernel/pci-dma.c +++ b/arch/xtensa/kernel/pci-dma.c @@ -137,7 +137,7 @@ static void *xtensa_dma_alloc(struct device *dev, size_t size, if (gfpflags_allow_blocking(flag)) page = dma_alloc_from_contiguous(dev, count, get_order(size), - flag); + flag & __GFP_NOWARN); if (!page) page = alloc_pages(flag, get_order(size)); diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 64cfe854e0f5..5ec97ffb561a 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2622,7 +2622,7 @@ static void *alloc_coherent(struct device *dev, size_t size, return NULL; page = dma_alloc_from_contiguous(dev, size >> PAGE_SHIFT, - get_order(size), flag); + get_order(size), flag & __GFP_NOWARN); if (!page) return NULL; } diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 869321c594e2..dd2d343428ab 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -3746,7 +3746,8 @@ static void *intel_alloc_coherent(struct device *dev, size_t size, if (gfpflags_allow_blocking(flags)) { unsigned int count = size >> PAGE_SHIFT; - page = dma_alloc_from_contiguous(dev, count, order, flags); + page = dma_alloc_from_contiguous(dev, count, order, + flags & __GFP_NOWARN); if (page && iommu_no_mapping(dev) && page_to_phys(page) + size > dev->coherent_dma_mask) { dma_release_from_contiguous(dev, page, count); diff --git a/include/linux/dma-contiguous.h b/include/linux/dma-contiguous.h index 3c5a4cb3eb95..f247e8aa5e3d 100644 --- a/include/linux/dma-contiguous.h +++ b/include/linux/dma-contiguous.h @@ -112,7 +112,7 @@ static inline int dma_declare_contiguous(struct device *dev, phys_addr_t size, } struct page *dma_alloc_from_contiguous(struct device *dev, size_t count, - unsigned int order, gfp_t gfp_mask); + unsigned int order, bool no_warn); bool dma_release_from_contiguous(struct device *dev, struct page *pages, int count); @@ -145,7 +145,7 @@ int dma_declare_contiguous(struct device *dev, phys_addr_t size, static inline struct page *dma_alloc_from_contiguous(struct device *dev, size_t count, - unsigned int order, gfp_t gfp_mask) + unsigned int order, bool no_warn) { return NULL; } diff --git a/kernel/dma/contiguous.c b/kernel/dma/contiguous.c index 19ea5d70150c..286d82329eb0 100644 --- a/kernel/dma/contiguous.c +++ b/kernel/dma/contiguous.c @@ -178,7 +178,7 @@ int __init dma_contiguous_reserve_area(phys_addr_t size, phys_addr_t base, * @dev: Pointer to device for which the allocation is performed. * @count: Requested number of pages. * @align: Requested alignment of pages (in PAGE_SIZE order). - * @gfp_mask: GFP flags to use for this allocation. + * @no_warn: Avoid printing message about failed allocation. * * This function allocates memory buffer for specified device. It uses * device specific contiguous memory area if available or the default @@ -186,13 +186,12 @@ int __init dma_contiguous_reserve_area(phys_addr_t size, phys_addr_t base, * function. */ struct page *dma_alloc_from_contiguous(struct device *dev, size_t count, - unsigned int align, gfp_t gfp_mask) + unsigned int align, bool no_warn) { if (align > CONFIG_CMA_ALIGNMENT) align = CONFIG_CMA_ALIGNMENT; - return cma_alloc(dev_get_cma_area(dev), count, align, - gfp_mask & __GFP_NOWARN); + return cma_alloc(dev_get_cma_area(dev), count, align, no_warn); } /** diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index 8be8106270c2..e0241beeb645 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -78,7 +78,8 @@ void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, again: /* CMA can be used only in the context which permits sleeping */ if (gfpflags_allow_blocking(gfp)) { - page = dma_alloc_from_contiguous(dev, count, page_order, gfp); + page = dma_alloc_from_contiguous(dev, count, page_order, + gfp & __GFP_NOWARN); if (page && !dma_coherent_ok(dev, page_to_phys(page), size)) { dma_release_from_contiguous(dev, page, count); page = NULL; -- 2.17.1