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| 2 | |
| 3 | * Copyright (c) 2015, Christoph Hellwig.
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| 4 | * Copyright (c) 2015, Intel Corporation.
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| 5 |
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| 6 | #include <linux/platform_device.h>
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| 7 | #include <linux/init.h>
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| 8 | #include <linux/ioport.h>
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| 9 |
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| 10 | static int found(struct resource *res, void *data)
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| 11 | {
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| 12 | return 1;
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| 13 | }
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| 14 |
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| 15 | static __init int register_e820_pmem(void)
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| 16 | {
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| 17 | struct platform_device *pdev;
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| 18 | int rc;
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| 19 |
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| 20 | rc = walk_iomem_res_desc(IORES_DESC_PERSISTENT_MEMORY_LEGACY,
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| 21 | IORESOURCE_MEM, 0, -1, NULL, found);
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| 22 | if (rc <= 0)
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| 23 | return 0;
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| 24 |
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| 25 | |
| 26 | * See drivers/nvdimm/e820.c for the implementation, this is
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| 27 | * simply here to trigger the module to load on demand.
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| 28 |
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| 29 | pdev = platform_device_alloc("e820_pmem", -1);
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| 30 | if (!pdev)
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| 31 | return -ENOMEM;
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| 32 |
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| 33 | rc = platform_device_add(pdev);
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| 34 | if (rc)
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| 35 | platform_device_put(pdev);
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| 36 |
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| 37 | return rc;
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| 38 | }
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| 39 | device_initcall(register_e820_pmem);
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