1 files changed, 16 insertions, 9 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 56bb6a4e15f3..d0cac8b58de7 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -22,6 +22,7 @@ typedef struct request_queue request_queue_t;
 struct elevator_queue;
 typedef struct elevator_queue elevator_t;
 struct request_pm_state;
+struct blk_trace;
 
 #define BLKDEV_MIN_RQ   4
 #define BLKDEV_MAX_RQ   128     /* Default maximum */
@@ -54,25 +55,29 @@ struct as_io_context {
 
 struct cfq_queue;
 struct cfq_io_context {
-        /*
-         * circular list of cfq_io_contexts belonging to a process io context
-         */
-        struct list_head list;
-        struct cfq_queue *cfqq[2];
+        struct rb_node rb_node;
         void *key;
 
+        struct cfq_queue *cfqq[2];
+
         struct io_context *ioc;
 
         unsigned long last_end_request;
-        unsigned long last_queue;
+        sector_t last_request_pos;
+        unsigned long last_queue;
+
         unsigned long ttime_total;
         unsigned long ttime_samples;
         unsigned long ttime_mean;
 
+        unsigned int seek_samples;
+        u64 seek_total;
+        sector_t seek_mean;
+
         struct list_head queue_list;
 
-        void (*dtor)(struct cfq_io_context *);
-        void (*exit)(struct cfq_io_context *);
+        void (*dtor)(struct io_context *); /* destructor */
+        void (*exit)(struct io_context *); /* called on task exit */
 };
 
 /*
@@ -93,7 +98,7 @@ struct io_context {
         int nr_batch_requests;     /* Number of requests left in the batch */
 
         struct as_io_context *aic;
-        struct cfq_io_context *cic;
+        struct rb_root cic_root;
 };
 
 void put_io_context(struct io_context *ioc);
@@ -416,6 +421,8 @@ struct request_queue
         unsigned int            sg_reserved_size;
         int                     node;
 
+        struct blk_trace        *blk_trace;
+
         /*
          * reserved for flush operations
          */