Merge branch 'for-4.5/core' of git://git.kernel.dk/linux-block

Pull core block updates from Jens Axboe:
 "We don't have a lot of core changes this time around, it's mostly in
  drivers, which will come in a subsequent pull.

  The cores changes include:

   - blk-mq
        - Prep patch from Christoph, changing blk_mq_alloc_request() to
          take flags instead of just using gfp_t for sleep/nosleep.
        - Doc patch from me, clarifying the difference between legacy
          and blk-mq for timer usage.
        - Fixes from Raghavendra for memory-less numa nodes, and a reuse
          of CPU masks.

   - Cleanup from Geliang Tang, using offset_in_page() instead of open
     coding it.

   - From Ilya, rename request_queue slab to it reflects what it holds,
     and a fix for proper use of bdgrab/put.

   - A real fix for the split across stripe boundaries from Keith.  We
     yanked a broken version of this from 4.4-rc final, this one works.

   - From Mike Krinkin, emit a trace message when we split.

   - From Wei Tang, two small cleanups, not explicitly clearing memory
     that is already cleared"

* 'for-4.5/core' of git://git.kernel.dk/linux-block:
  block: use bd{grab,put}() instead of open-coding
  block: split bios to max possible length
  block: add call to split trace point
  blk-mq: Avoid memoryless numa node encoded in hctx numa_node
  blk-mq: Reuse hardware context cpumask for tags
  blk-mq: add a flags parameter to blk_mq_alloc_request
  Revert "blk-flush: Queue through IO scheduler when flush not required"
  block: clarify blk_add_timer() use case for blk-mq
  bio: use offset_in_page macro
  block: do not initialise statics to 0 or NULL
  block: do not initialise globals to 0 or NULL
  block: rename request_queue slab cache

diff --cc block/blk-core.c
Simple merge

diff --cc block/blk-merge.c
Simple merge

diff --cc block/genhd.c
Simple merge

diff --cc drivers/block/mtip32xx/mtip32xx.c
Simple merge

diff --cc drivers/block/null_blk.c
Simple merge

diff --cc drivers/nvme/host/lightnvm.c
Simple merge

diff --cc drivers/nvme/host/pci.c
Simple merge

diff --cc fs/block_dev.c
Simple merge

diff --cc include/linux/blkdev.h
index bfb64d6,e711f29..d372ea8
--- 1/include/linux/blkdev.h
--- 2/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@@ -795,10 -794,9 +795,10 @@@ extern int scsi_cmd_ioctl(struct reques
  extern int sg_scsi_ioctl(struct request_queue *, struct gendisk *, fmode_t,
                         struct scsi_ioctl_command __user *);
  
- extern int blk_queue_enter(struct request_queue *q, gfp_t gfp);
+ extern int blk_queue_enter(struct request_queue *q, bool nowait);
  extern void blk_queue_exit(struct request_queue *q);
  extern void blk_start_queue(struct request_queue *q);
 +extern void blk_start_queue_async(struct request_queue *q);
  extern void blk_stop_queue(struct request_queue *q);
  extern void blk_sync_queue(struct request_queue *q);
  extern void __blk_stop_queue(struct request_queue *q);