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Thu, 17 Jun 2021 15:18:14 +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, Alex Sierra Subject: [PATCH v3 3/8] kernel: resource: lookup_resource as exported symbol Date: Thu, 17 Jun 2021 10:17:00 -0500 Message-Id: <20210617151705.15367-4-alex.sierra@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210617151705.15367-1-alex.sierra@amd.com> References: <20210617151705.15367-1-alex.sierra@amd.com> X-Originating-IP: [165.204.78.1] X-ClientProxiedBy: SN4PR0501CA0088.namprd05.prod.outlook.com (2603:10b6:803:22::26) To DM6PR12MB4419.namprd12.prod.outlook.com (2603:10b6:5:2aa::20) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from alex-MS-7B09.amd.com (165.204.78.1) by SN4PR0501CA0088.namprd05.prod.outlook.com (2603:10b6:803:22::26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4264.9 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: d163c79c-44f7-4f4a-a116-08d931a32028 X-MS-Exchange-CrossTenant-AuthSource: DM6PR12MB4419.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jun 2021 15:18:14.0959 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: H0KNQDuCw1IyqTnabmyEPSJf7cxuUWVat+EIW2Bb06yFCE35l864pOsnJBlBnPvlB+tOUP9uL62lsQpMFUPfeA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB2970 Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org The AMD architecture for the Frontier supercomputer will have device memory which can be coherently accessed by the CPU. 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())