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Diffstat (limited to 'drivers/nvdimm/pfn.h')
-rw-r--r--drivers/nvdimm/pfn.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/nvdimm/pfn.h b/drivers/nvdimm/pfn.h
index 8e343a3ca..dde985345 100644
--- a/drivers/nvdimm/pfn.h
+++ b/drivers/nvdimm/pfn.h
@@ -19,6 +19,7 @@
#define PFN_SIG_LEN 16
#define PFN_SIG "NVDIMM_PFN_INFO\0"
+#define DAX_SIG "NVDIMM_DAX_INFO\0"
struct nd_pfn_sb {
u8 signature[PFN_SIG_LEN];
@@ -33,7 +34,9 @@ struct nd_pfn_sb {
/* minor-version-1 additions for section alignment */
__le32 start_pad;
__le32 end_trunc;
- u8 padding[4004];
+ /* minor-version-2 record the base alignment of the mapping */
+ __le32 align;
+ u8 padding[4000];
__le64 checksum;
};