1 files changed, 22 insertions, 6 deletions

diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h
index 9459689c4ea0..2390e0e83daf 100644
--- a/drivers/md/raid5.h
+++ b/drivers/md/raid5.h
@@ -2,6 +2,7 @@
 #define _RAID5_H
 
 #include <linux/raid/xor.h>
+#include <linux/dmaengine.h>
 
 /*
  *
@@ -175,7 +176,9 @@
  */
 enum check_states {
         check_state_idle = 0,
-        check_state_run, /* parity check */
+        check_state_run, /* xor parity check */
+        check_state_run_q, /* q-parity check */
+        check_state_run_pq, /* pq dual parity check */
         check_state_check_result,
         check_state_compute_run, /* parity repair */
         check_state_compute_result,
@@ -215,8 +218,8 @@ struct stripe_head {
          * @target - STRIPE_OP_COMPUTE_BLK target
          */
         struct stripe_operations {
-                int                target;
-                u32                zero_sum_result;
+                int                  target, target2;
+                enum sum_check_flags zero_sum_result;
         } ops;
         struct r5dev {
                 struct bio      req;
@@ -298,7 +301,7 @@ struct r6_state {
 #define STRIPE_OP_COMPUTE_BLK   1
 #define STRIPE_OP_PREXOR        2
 #define STRIPE_OP_BIODRAIN      3
-#define STRIPE_OP_POSTXOR       4
+#define STRIPE_OP_RECONSTRUCT   4
 #define STRIPE_OP_CHECK 5
 
 /*
@@ -385,8 +388,21 @@ struct raid5_private_data {
                                             * (fresh device added).
                                             * Cleared when a sync completes.
                                             */
-
-        struct page             *spare_page; /* Used when checking P/Q in raid6 */
+        /* per cpu variables */
+        struct raid5_percpu {
+                struct page     *spare_page; /* Used when checking P/Q in raid6 */
+                void            *scribble;   /* space for constructing buffer
+                                              * lists and performing address
+                                              * conversions
+                                              */
+        } *percpu;
+        size_t                  scribble_len; /* size of scribble region must be
+                                               * associated with conf to handle
+                                               * cpu hotplug while reshaping
+                                               */
+#ifdef CONFIG_HOTPLUG_CPU
+        struct notifier_block   cpu_notify;
+#endif
 
         /*
          * Free stripes pool