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| author |   Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2019-09-05 21:16:00 +0530 |
|---|---|---|
| committer |   Dan Williams <dan.j.williams@intel.com> | 2019-09-05 16:11:14 -0700 |
| commit | edbb52c24441ab5203b969eca759483cb533f36d (patch) | |
| tree | 665648762062a8383fffc6b1e959414f52d330a4 /drivers/nvdimm/pfn.h | |
| parent | libnvdimm/pfn_dev: Add a build check to make sure we notice when struct page size change (diff) | |
| download | linux-dev-edbb52c24441ab5203b969eca759483cb533f36d.tar.xz linux-dev-edbb52c24441ab5203b969eca759483cb533f36d.zip | |
libnvdimm/pfn_dev: Add page size and struct page size to pfn superblock
This is needed so that pmem probe don't wrongly initialize a namespace
which doesn't have enough space reserved for holding struct pages
with the current kernel.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Link: https://lore.kernel.org/r/20190905154603.10349-5-aneesh.kumar@linux.ibm.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/pfn.h')
| -rw-r--r-- | drivers/nvdimm/pfn.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/nvdimm/pfn.h b/drivers/nvdimm/pfn.h index 7381673b7b70..acb19517f678 100644 --- a/drivers/nvdimm/pfn.h +++ b/drivers/nvdimm/pfn.h @@ -29,7 +29,10 @@ struct nd_pfn_sb { /* minor-version-2 record the base alignment of the mapping */ __le32 align; /* minor-version-3 guarantee the padding and flags are zero */ - u8 padding[4000]; + /* minor-version-4 record the page size and struct page size */ + __le32 page_size; + __le16 page_struct_size; + u8 padding[3994]; __le64 checksum; }; |