1 files changed, 16 insertions, 18 deletions

diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 29c1a6e83814..a4ea0ce83b07 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -33,8 +33,6 @@ struct blk_mq_hw_ctx {
         unsigned int            nr_ctx_map;
         unsigned long           *ctx_map;
 
-        struct request          **rqs;
-        struct list_head        page_list;
         struct blk_mq_tags      *tags;
 
         unsigned long           queued;
@@ -42,7 +40,6 @@ struct blk_mq_hw_ctx {
 #define BLK_MQ_MAX_DISPATCH_ORDER       10
         unsigned long           dispatched[BLK_MQ_MAX_DISPATCH_ORDER];
 
-        unsigned int            queue_depth;
         unsigned int            numa_node;
         unsigned int            cmd_size;       /* per-request extra data */
 
@@ -50,7 +47,7 @@ struct blk_mq_hw_ctx {
         struct kobject          kobj;
 };
 
-struct blk_mq_reg {
+struct blk_mq_tag_set {
         struct blk_mq_ops       *ops;
         unsigned int            nr_hw_queues;
         unsigned int            queue_depth;
@@ -59,18 +56,22 @@ struct blk_mq_reg {
         int                     numa_node;
         unsigned int            timeout;
         unsigned int            flags;          /* BLK_MQ_F_* */
+        void                    *driver_data;
+
+        struct blk_mq_tags      **tags;
 };
 
 typedef int (queue_rq_fn)(struct blk_mq_hw_ctx *, struct request *);
 typedef struct blk_mq_hw_ctx *(map_queue_fn)(struct request_queue *, const int);
-typedef struct blk_mq_hw_ctx *(alloc_hctx_fn)(struct blk_mq_reg *,unsigned int);
+typedef struct blk_mq_hw_ctx *(alloc_hctx_fn)(struct blk_mq_tag_set *,
+                unsigned int);
 typedef void (free_hctx_fn)(struct blk_mq_hw_ctx *, unsigned int);
 typedef int (init_hctx_fn)(struct blk_mq_hw_ctx *, void *, unsigned int);
 typedef void (exit_hctx_fn)(struct blk_mq_hw_ctx *, unsigned int);
-typedef int (init_request_fn)(void *, struct blk_mq_hw_ctx *,
-                struct request *, unsigned int);
-typedef void (exit_request_fn)(void *, struct blk_mq_hw_ctx *,
-                struct request *, unsigned int);
+typedef int (init_request_fn)(void *, struct request *, unsigned int,
+                unsigned int, unsigned int);
+typedef void (exit_request_fn)(void *, struct request *, unsigned int,
+                unsigned int);
 
 struct blk_mq_ops {
         /*
@@ -127,10 +128,13 @@ enum {
         BLK_MQ_MAX_DEPTH        = 2048,
 };
 
-struct request_queue *blk_mq_init_queue(struct blk_mq_reg *, void *);
+struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *);
 int blk_mq_register_disk(struct gendisk *);
 void blk_mq_unregister_disk(struct gendisk *);
 
+int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set);
+void blk_mq_free_tag_set(struct blk_mq_tag_set *set);
+
 void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule);
 
 void blk_mq_insert_request(struct request *, bool, bool, bool);
@@ -139,10 +143,10 @@ void blk_mq_free_request(struct request *rq);
 bool blk_mq_can_queue(struct blk_mq_hw_ctx *);
 struct request *blk_mq_alloc_request(struct request_queue *q, int rw, gfp_t gfp);
 struct request *blk_mq_alloc_reserved_request(struct request_queue *q, int rw, gfp_t gfp);
-struct request *blk_mq_rq_from_tag(struct request_queue *q, unsigned int tag);
+struct request *blk_mq_tag_to_rq(struct blk_mq_tags *tags, unsigned int tag);
 
 struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *, const int ctx_index);
-struct blk_mq_hw_ctx *blk_mq_alloc_single_hw_queue(struct blk_mq_reg *, unsigned int);
+struct blk_mq_hw_ctx *blk_mq_alloc_single_hw_queue(struct blk_mq_tag_set *, unsigned int);
 void blk_mq_free_single_hw_queue(struct blk_mq_hw_ctx *, unsigned int);
 
 bool blk_mq_end_io_partial(struct request *rq, int error,
@@ -173,12 +177,6 @@ static inline void *blk_mq_rq_to_pdu(struct request *rq)
         return (void *) rq + sizeof(*rq);
 }
 
-static inline struct request *blk_mq_tag_to_rq(struct blk_mq_hw_ctx *hctx,
-                                               unsigned int tag)
-{
-        return hctx->rqs[tag];
-}
-
 #define queue_for_each_hw_ctx(q, hctx, i)                               \
         for ((i) = 0; (i) < (q)->nr_hw_queues &&                        \
              ({ hctx = (q)->queue_hw_ctx[i]; 1; }); (i)++)