5 files changed, 33 insertions, 28 deletions

diff --git a/block/blk-core.c b/block/blk-core.c
index 071ae6d2768..90f22cc3079 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -2163,7 +2163,7 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
          * size, something has gone terribly wrong.
          */
         if (blk_rq_bytes(req) < blk_rq_cur_bytes(req)) {
-                printk(KERN_ERR "blk: request botched\n");
+                blk_dump_rq_flags(req, "request botched");
                 req->__data_len = blk_rq_cur_bytes(req);
         }
 
@@ -2665,7 +2665,7 @@ static int plug_rq_cmp(void *priv, struct list_head *a, struct list_head *b)
         struct request *rqa = container_of(a, struct request, queuelist);
         struct request *rqb = container_of(b, struct request, queuelist);
 
-        return !(rqa->q == rqb->q);
+        return !(rqa->q <= rqb->q);
 }
 
 static void flush_plug_list(struct blk_plug *plug)
diff --git a/block/blk-flush.c b/block/blk-flush.c
index 93d5fd8e51e..eba4a2790c6 100644
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -261,7 +261,7 @@ static bool blk_kick_flush(struct request_queue *q)
         q->flush_rq.end_io = flush_end_io;
 
         q->flush_pending_idx ^= 1;
-        elv_insert(q, &q->flush_rq, ELEVATOR_INSERT_REQUEUE);
+        list_add_tail(&q->flush_rq.queuelist, &q->queue_head);
         return true;
 }
 
@@ -281,7 +281,7 @@ static void flush_data_end_io(struct request *rq, int error)
  * blk_insert_flush - insert a new FLUSH/FUA request
  * @rq: request to insert
  *
- * To be called from elv_insert() for %ELEVATOR_INSERT_FLUSH insertions.
+ * To be called from __elv_add_request() for %ELEVATOR_INSERT_FLUSH insertions.
  * @rq is being submitted.  Analyze what needs to be done and put it on the
  * right queue.
  *
@@ -312,7 +312,7 @@ void blk_insert_flush(struct request *rq)
          */
         if ((policy & REQ_FSEQ_DATA) &&
             !(policy & (REQ_FSEQ_PREFLUSH | REQ_FSEQ_POSTFLUSH))) {
-                list_add(&rq->queuelist, &q->queue_head);
+                list_add_tail(&rq->queuelist, &q->queue_head);
                 return;
         }
 
diff --git a/block/blk-integrity.c b/block/blk-integrity.c
index 54bcba6c02a..129b9e209a3 100644
--- a/block/blk-integrity.c
+++ b/block/blk-integrity.c
@@ -30,6 +30,8 @@
 
 static struct kmem_cache *integrity_cachep;
 
+static const char *bi_unsupported_name = "unsupported";
+
 /**
  * blk_rq_count_integrity_sg - Count number of integrity scatterlist elements
  * @q:          request queue
@@ -358,6 +360,14 @@ static struct kobj_type integrity_ktype = {
         .release        = blk_integrity_release,
 };
 
+bool blk_integrity_is_initialized(struct gendisk *disk)
+{
+        struct blk_integrity *bi = blk_get_integrity(disk);
+
+        return (bi && bi->name && strcmp(bi->name, bi_unsupported_name) != 0);
+}
+EXPORT_SYMBOL(blk_integrity_is_initialized);
+
 /**
  * blk_integrity_register - Register a gendisk as being integrity-capable
  * @disk:       struct gendisk pointer to make integrity-aware
@@ -407,7 +417,7 @@ int blk_integrity_register(struct gendisk *disk, struct blk_integrity *template)
                 bi->get_tag_fn = template->get_tag_fn;
                 bi->tag_size = template->tag_size;
         } else
-                bi->name = "unsupported";
+                bi->name = bi_unsupported_name;
 
         return 0;
 }
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index c8b16c88b31..0475a22a420 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -77,7 +77,7 @@ struct throtl_grp {
         unsigned long slice_end[2];
 
         /* Some throttle limits got updated for the group */
-        bool limits_changed;
+        int limits_changed;
 };
 
 struct throtl_data
@@ -102,7 +102,7 @@ struct throtl_data
         /* Work for dispatching throttled bios */
         struct delayed_work throtl_work;
 
-        bool limits_changed;
+        int limits_changed;
 };
 
 enum tg_state_flags {
diff --git a/block/elevator.c b/block/elevator.c
index c387d316873..0cdb4e7ebab 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -610,7 +610,7 @@ void elv_requeue_request(struct request_queue *q, struct request *rq)
 
         rq->cmd_flags &= ~REQ_STARTED;
 
-        elv_insert(q, rq, ELEVATOR_INSERT_REQUEUE);
+        __elv_add_request(q, rq, ELEVATOR_INSERT_REQUEUE);
 }
 
 void elv_drain_elevator(struct request_queue *q)
@@ -655,12 +655,25 @@ void elv_quiesce_end(struct request_queue *q)
         queue_flag_clear(QUEUE_FLAG_ELVSWITCH, q);
 }
 
-void elv_insert(struct request_queue *q, struct request *rq, int where)
+void __elv_add_request(struct request_queue *q, struct request *rq, int where)
 {
         trace_block_rq_insert(q, rq);
 
         rq->q = q;
 
+        BUG_ON(rq->cmd_flags & REQ_ON_PLUG);
+
+        if (rq->cmd_flags & REQ_SOFTBARRIER) {
+                /* barriers are scheduling boundary, update end_sector */
+                if (rq->cmd_type == REQ_TYPE_FS ||
+                    (rq->cmd_flags & REQ_DISCARD)) {
+                        q->end_sector = rq_end_sector(rq);
+                        q->boundary_rq = rq;
+                }
+        } else if (!(rq->cmd_flags & REQ_ELVPRIV) &&
+                    where == ELEVATOR_INSERT_SORT)
+                where = ELEVATOR_INSERT_BACK;
+
         switch (where) {
         case ELEVATOR_INSERT_REQUEUE:
         case ELEVATOR_INSERT_FRONT:
@@ -722,24 +735,6 @@ void elv_insert(struct request_queue *q, struct request *rq, int where)
                 BUG();
         }
 }
-
-void __elv_add_request(struct request_queue *q, struct request *rq, int where)
-{
-        BUG_ON(rq->cmd_flags & REQ_ON_PLUG);
-
-        if (rq->cmd_flags & REQ_SOFTBARRIER) {
-                /* barriers are scheduling boundary, update end_sector */
-                if (rq->cmd_type == REQ_TYPE_FS ||
-                    (rq->cmd_flags & REQ_DISCARD)) {
-                        q->end_sector = rq_end_sector(rq);
-                        q->boundary_rq = rq;
-                }
-        } else if (!(rq->cmd_flags & REQ_ELVPRIV) &&
-                    where == ELEVATOR_INSERT_SORT)
-                where = ELEVATOR_INSERT_BACK;
-
-        elv_insert(q, rq, where);
-}
 EXPORT_SYMBOL(__elv_add_request);
 
 void elv_add_request(struct request_queue *q, struct request *rq, int where)