From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- arch/x86/kernel/pmem.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 arch/x86/kernel/pmem.c (limited to 'arch/x86/kernel/pmem.c') diff --git a/arch/x86/kernel/pmem.c b/arch/x86/kernel/pmem.c new file mode 100644 index 0000000000..23154d24b1 --- /dev/null +++ b/arch/x86/kernel/pmem.c @@ -0,0 +1,37 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2015, Christoph Hellwig. + * Copyright (c) 2015, Intel Corporation. + */ +#include +#include +#include + +static int found(struct resource *res, void *data) +{ + return 1; +} + +static __init int register_e820_pmem(void) +{ + struct platform_device *pdev; + int rc; + + rc = walk_iomem_res_desc(IORES_DESC_PERSISTENT_MEMORY_LEGACY, + IORESOURCE_MEM, 0, -1, NULL, found); + if (rc <= 0) + return 0; + + /* + * See drivers/nvdimm/e820.c for the implementation, this is + * simply here to trigger the module to load on demand. + */ + pdev = platform_device_alloc("e820_pmem", -1); + + rc = platform_device_add(pdev); + if (rc) + platform_device_put(pdev); + + return rc; +} +device_initcall(register_e820_pmem); -- cgit v1.2.3