[PATCH v5] conversion to blk-mq

[Matias Bjørling]

Hi Matthew and Keith,

Here is an updated patch with the feedback from the previous days. It's against
Jens' for-3.16/core tree. You may use the nvmemq_wip_review branch at:

https://github.com/MatiasBjorling/linux-collab nvmemq_wip_review

and see the changes from v4 to v5 here:

https://github.com/MatiasBjorling/linux-collab/commit/e650bc5

Changes since v4:
  * Fix timeout retries
  * Fix naming in nvme_init_hctx
  * Fix racy behavior of admin queue in nvme_dev_remove
  * Fix wrong return values in nvme_queue_request
  * Put cqe_seen back
  * Introduce abort_completion for killing timed out I/Os
  * Move locks outside of nvme_submit_iod
  * Various renaming and style fixes

Changes since v3:
  * Added abortion logic
  * Fixed possible race on abortion
  * Removed req data with flush. Handled by by blk-mq
  * Added safety check for submitting user rq to admin queue.
  * Use dev->online_queues for nr_hw_queues
  * Fix loop with initialization in nvme_create_io_queues
  * Style fixups

Changes since v2:
  * rebased on top of current 3.16/core.
  * use blk-mq queue management for spreading io queues
  * removed rcu handling and allocated all io queues up front for mgmt by blk-mq
  * removed the need for hotplugging notification
  * fixed flush data handling
  * fixed double free of spinlock
  * various cleanup

Matias Bjørling (1):
  NVMe: conversion to blk-mq

 drivers/block/nvme-core.c | 1149 ++++++++++++++++++---------------------------
 drivers/block/nvme-scsi.c |    8 +-
 include/linux/nvme.h      |   14 +-
 3 files changed, 478 insertions(+), 693 deletions(-)

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1.9.1