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Fri, 13 Aug 2021 06:32:05 +0000 From: Alex Sierra To: akpm@linux-foundation.org, Felix.Kuehling@amd.com, linux-mm@kvack.org, rcampbell@nvidia.com, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, hch@lst.de, jgg@nvidia.com, jglisse@redhat.com Subject: [PATCH v6 03/13] kernel: resource: lookup_resource as exported symbol Date: Fri, 13 Aug 2021 01:31:40 -0500 Message-Id: <20210813063150.2938-4-alex.sierra@amd.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210813063150.2938-1-alex.sierra@amd.com> References: <20210813063150.2938-1-alex.sierra@amd.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: SN7PR18CA0026.namprd18.prod.outlook.com (2603:10b6:806:f3::18) To SA0PR12MB4430.namprd12.prod.outlook.com (2603:10b6:806:70::20) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from alex-MS-7B09.amd.com (165.204.78.1) by SN7PR18CA0026.namprd18.prod.outlook.com (2603:10b6:806:f3::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4415.17 via Frontend Transport; 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The system BIOS advertises this memory as SPM (special purpose memory) in the UEFI system address map. The AMDGPU driver needs to be able to lookup this resource in order to claim it as MEMORY_DEVICE_GENERIC using devm_memremap_pages. Signed-off-by: Alex Sierra --- kernel/resource.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/resource.c b/kernel/resource.c index ca9f5198a01f..227fc9fab573 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -772,6 +772,7 @@ struct resource *lookup_resource(struct resource *root, resource_size_t start) return res; } +EXPORT_SYMBOL_GPL(lookup_resource); /* * Insert a resource into the resource tree. If successful, return NULL, -- 2.32.0