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a3619190d6
Now that the mm core supports section-unaligned hotplug of ZONE_DEVICE memory, we no longer need to add padding at pfn/dax device creation time. The kernel will still honor padding established by older kernels. Link: http://lkml.kernel.org/r/156092356588.979959.6793371748950931916.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com> Reported-by: Jeff Moyer <jmoyer@redhat.com> Tested-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> [ppc64] Cc: David Hildenbrand <david@redhat.com> Cc: Jane Chu <jane.chu@oracle.com> Cc: Jérôme Glisse <jglisse@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Logan Gunthorpe <logang@deltatee.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@linux.ibm.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Toshi Kani <toshi.kani@hpe.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Wei Yang <richardw.yang@linux.intel.com> Cc: Jason Gunthorpe <jgg@mellanox.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
37 lines
833 B
C
37 lines
833 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2014-2015, Intel Corporation.
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*/
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#ifndef __NVDIMM_PFN_H
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#define __NVDIMM_PFN_H
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#include <linux/types.h>
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#include <linux/mmzone.h>
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#define PFN_SIG_LEN 16
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#define PFN_SIG "NVDIMM_PFN_INFO\0"
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#define DAX_SIG "NVDIMM_DAX_INFO\0"
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struct nd_pfn_sb {
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u8 signature[PFN_SIG_LEN];
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u8 uuid[16];
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u8 parent_uuid[16];
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__le32 flags;
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__le16 version_major;
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__le16 version_minor;
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__le64 dataoff; /* relative to namespace_base + start_pad */
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__le64 npfns;
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__le32 mode;
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/* minor-version-1 additions for section alignment */
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__le32 start_pad;
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__le32 end_trunc;
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/* minor-version-2 record the base alignment of the mapping */
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__le32 align;
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/* minor-version-3 guarantee the padding and flags are zero */
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u8 padding[4000];
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__le64 checksum;
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};
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#endif /* __NVDIMM_PFN_H */
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