1 files changed, 13 insertions, 9 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index c179966f1a..d0cac8b58d 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -55,25 +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 */
 };
 
 /*
@@ -94,7 +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);