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dkim=none (message not signed) header.d=none;linux-foundation.org; dmarc=none action=none header.from=amd.com; Received: from SA0PR12MB4430.namprd12.prod.outlook.com (2603:10b6:806:70::20) by SN6PR12MB4670.namprd12.prod.outlook.com (2603:10b6:805:11::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4308.22; Sat, 17 Jul 2021 19:21:55 +0000 Received: from SA0PR12MB4430.namprd12.prod.outlook.com ([fe80::d0d3:a97e:6b7f:ab39]) by SA0PR12MB4430.namprd12.prod.outlook.com ([fe80::d0d3:a97e:6b7f:ab39%7]) with mapi id 15.20.4331.029; Sat, 17 Jul 2021 19:21:55 +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 Subject: [PATCH v4 03/13] kernel: resource: lookup_resource as exported symbol Date: Sat, 17 Jul 2021 14:21:25 -0500 Message-Id: <20210717192135.9030-4-alex.sierra@amd.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210717192135.9030-1-alex.sierra@amd.com> References: <20210717192135.9030-1-alex.sierra@amd.com> X-ClientProxiedBy: SN4PR0201CA0067.namprd02.prod.outlook.com (2603:10b6:803:20::29) 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 SN4PR0201CA0067.namprd02.prod.outlook.com (2603:10b6:803:20::29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4331.22 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 | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/resource.c b/kernel/resource.c index 627e61b0c124..269489bb7097 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -783,7 +783,7 @@ 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, * otherwise return the conflicting resource (compare to __request_resource())