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| author |   Dan Williams <dan.j.williams@intel.com> | 2016-03-03 09:14:36 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2016-03-05 12:25:44 -0800 |
| commit | d9cbe09d39aa13f6924dc5fb88325de7ef01a72e (patch) | |
| tree | 8d2e60e548272353fbfa8bd9ac705cdfac918efc /drivers/nvdimm/pfn.h | |
| parent | Merge tag 'v4.5-rc6' into core/resources, to resolve conflict (diff) | |
| download | linux-dev-d9cbe09d39aa13f6924dc5fb88325de7ef01a72e.tar.xz linux-dev-d9cbe09d39aa13f6924dc5fb88325de7ef01a72e.zip | |
libnvdimm, pmem: fix 'pfn' support for section-misaligned namespaces
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>
Diffstat (limited to 'drivers/nvdimm/pfn.h')
| -rw-r--r-- | drivers/nvdimm/pfn.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/nvdimm/pfn.h b/drivers/nvdimm/pfn.h index cc243754acef..6ee707e5b279 100644 --- a/drivers/nvdimm/pfn.h +++ b/drivers/nvdimm/pfn.h @@ -15,6 +15,7 @@ #define __NVDIMM_PFN_H #include <linux/types.h> +#include <linux/mmzone.h> #define PFN_SIG_LEN 16 #define PFN_SIG "NVDIMM_PFN_INFO\0" @@ -32,4 +33,16 @@ struct nd_pfn_sb { 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 */ |