From mboxrd@z Thu Jan 1 00:00:00 1970 From: Subject: [PATCH] kernel/dma: export dma_alloc_from_contiguous to modules Date: Thu, 11 Jul 2019 13:33:43 +0800 Message-ID: <20190711053343.28873-1-miles.chen@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Sender: linux-kernel-owner@vger.kernel.org To: Christoph Hellwig , Marek Szyprowski , Robin Murphy Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, wsd_upstream@mediatek.com, linux-mediatek@lists.infradead.org, Miles Chen List-Id: linux-mediatek@lists.infradead.org From: Miles Chen This change exports dma_alloc_from_contiguous and dma_release_from_contiguous to modules. Currently, we can add a reserve a memory node in dts files, make it a CMA memory by setting compatible = "shared-dma-pool", and setup the dev->cma_area by using of_reserved_mem_device_init_by_idx(). Export dma_alloc_from_contiguous and dma_release_from_contiguous, so we can allocate/free from/to dev->cma_area in kernel modules. Signed-off-by: Miles Chen --- kernel/dma/contiguous.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/dma/contiguous.c b/kernel/dma/contiguous.c index b2a87905846d..d5920bdedc77 100644 --- a/kernel/dma/contiguous.c +++ b/kernel/dma/contiguous.c @@ -197,6 +197,7 @@ struct page *dma_alloc_from_contiguous(struct device *dev, size_t count, return cma_alloc(dev_get_cma_area(dev), count, align, no_warn); } +EXPORT_SYMBOL_GPL(dma_alloc_from_contiguous); /** * dma_release_from_contiguous() - release allocated pages @@ -213,6 +214,7 @@ bool dma_release_from_contiguous(struct device *dev, struct page *pages, { return cma_release(dev_get_cma_area(dev), pages, count); } +EXPORT_SYMBOL_GPL(dma_release_from_contiguous); /* * Support for reserved memory regions defined in device tree -- 2.18.0