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-rw-r--r--include/linux/raid/md_p.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/raid/md_p.h b/include/linux/raid/md_p.h
index 9e65d9e2066..6f6df86f1ae 100644
--- a/include/linux/raid/md_p.h
+++ b/include/linux/raid/md_p.h
@@ -277,7 +277,10 @@ struct mdp_superblock_1 {
*/
#define MD_FEATURE_RESHAPE_ACTIVE 4
#define MD_FEATURE_BAD_BLOCKS 8 /* badblock list is not empty */
-
-#define MD_FEATURE_ALL (1|2|4|8)
+#define MD_FEATURE_REPLACEMENT 16 /* This device is replacing an
+ * active device with same 'role'.
+ * 'recovery_offset' is also set.
+ */
+#define MD_FEATURE_ALL (1|2|4|8|16)
#endif