block: remove request_list code

It's now dead code, nobody uses it.

Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 0 insertions, 34 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 877a3d235c45..e0c661a95c39 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -58,22 +58,6 @@ struct blk_stat_callback;
 
 typedef void (rq_end_io_fn)(struct request *, blk_status_t);
 
-struct request_list {
-        struct request_queue    *q;     /* the queue this rl belongs to */
-#ifdef CONFIG_BLK_CGROUP
-        struct blkcg_gq         *blkg;  /* blkg this request pool belongs to */
-#endif
-        /*
-         * count[], starved[], and wait[] are indexed by
-         * BLK_RW_SYNC/BLK_RW_ASYNC
-         */
-        int                     count[2];
-        int                     starved[2];
-        mempool_t               *rq_pool;
-        wait_queue_head_t       wait[2];
-        unsigned int            flags;
-};
-
 /*
  * request flags */
 typedef __u32 __bitwise req_flags_t;
@@ -259,10 +243,6 @@ struct request {
 
         /* for bidi */
         struct request *next_rq;
-
-#ifdef CONFIG_BLK_CGROUP
-        struct request_list *rl;                /* rl this rq is alloced from */
-#endif
 };
 
 static inline bool blk_op_is_scsi(unsigned int op)
@@ -312,8 +292,6 @@ typedef bool (poll_q_fn) (struct request_queue *q, blk_qc_t);
 struct bio_vec;
 typedef void (softirq_done_fn)(struct request *);
 typedef int (dma_drain_needed_fn)(struct request *);
-typedef int (init_rq_fn)(struct request_queue *, struct request *, gfp_t);
-typedef void (exit_rq_fn)(struct request_queue *, struct request *);
 
 enum blk_eh_timer_return {
         BLK_EH_DONE,            /* drivers has completed the command */
@@ -427,22 +405,10 @@ struct request_queue {
         struct blk_queue_stats  *stats;
         struct rq_qos           *rq_qos;
 
-        /*
-         * If blkcg is not used, @q->root_rl serves all requests.  If blkcg
-         * is used, root blkg allocates from @q->root_rl and all other
-         * blkgs from their own blkg->rl.  Which one to use should be
-         * determined using bio_request_list().
-         */
-        struct request_list     root_rl;
-
         make_request_fn         *make_request_fn;
         poll_q_fn               *poll_fn;
         softirq_done_fn         *softirq_done_fn;
         dma_drain_needed_fn     *dma_drain_needed;
-        /* Called just after a request is allocated */
-        init_rq_fn              *init_rq_fn;
-        /* Called just before a request is freed */
-        exit_rq_fn              *exit_rq_fn;
 
         const struct blk_mq_ops *mq_ops;