mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-13 14:14:37 +00:00
d9cbe09d39
The altmap for a section-misaligned namespace needs to arrange for the
base_pfn to be section-aligned. As a result the 'reserve' region (pfns
from base that do not have a struct page) must be increased. Otherwise
we trip the altmap validation check in __add_pages:
if (altmap->base_pfn != phys_start_pfn
|| vmem_altmap_offset(altmap) > nr_pages) {
pr_warn_once("memory add fail, invalid altmap\n");
return -EINVAL;
}
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
/*
|
|
* Copyright (c) 2014-2015, Intel Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
|
|
#ifndef __NVDIMM_PFN_H
|
|
#define __NVDIMM_PFN_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/mmzone.h>
|
|
|
|
#define PFN_SIG_LEN 16
|
|
#define PFN_SIG "NVDIMM_PFN_INFO\0"
|
|
|
|
struct nd_pfn_sb {
|
|
u8 signature[PFN_SIG_LEN];
|
|
u8 uuid[16];
|
|
u8 parent_uuid[16];
|
|
__le32 flags;
|
|
__le16 version_major;
|
|
__le16 version_minor;
|
|
__le64 dataoff;
|
|
__le64 npfns;
|
|
__le32 mode;
|
|
u8 padding[4012];
|
|
__le64 checksum;
|
|
};
|
|
|
|
#ifdef CONFIG_SPARSEMEM
|
|
#define PFN_SECTION_ALIGN_DOWN(x) SECTION_ALIGN_DOWN(x)
|
|
#define PFN_SECTION_ALIGN_UP(x) SECTION_ALIGN_UP(x)
|
|
#else
|
|
/*
|
|
* In this case ZONE_DEVICE=n and we will disable 'pfn' device support,
|
|
* but we still want pmem to compile.
|
|
*/
|
|
#define PFN_SECTION_ALIGN_DOWN(x) (x)
|
|
#define PFN_SECTION_ALIGN_UP(x) (x)
|
|
#endif
|
|
#endif /* __NVDIMM_PFN_H */
|