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    Merge tag 'for-linus-20190726' of git:// · 04412819
    Linus Torvalds authored
    Pull block fixes from Jens Axboe:
     - Several io_uring fixes/improvements:
         - Blocking fix for O_DIRECT (me)
         - Latter page slowness for registered buffers (me)
         - Fix poll hang under certain conditions (me)
         - Defer sequence check fix for wrapped rings (Zhengyuan)
         - Mismatch in async inc/dec accounting (Zhengyuan)
         - Memory ordering issue that could cause stall (Zhengyuan)
          - Track sequential defer in bytes, not pages (Zhengyuan)
     - NVMe pull request from Christoph
     - Set of hang fixes for wbt (Josef)
     - Redundant error message kill for libahci (Ding)
     - Remove unused blk_mq_sched_started_request() and related ops (Marcos)
     - drbd dynamic alloc shash descriptor to reduce stack use (Arnd)
     - blkcg ->pd_stat() non-debug print (Tejun)
     - bcache memory leak fix (Wei)
     - Comment fix (Akinobu)
     - BFQ perf regression fix (Paolo)
    * tag 'for-linus-20190726' of git:// (24 commits)
      io_uring: ensure ->list is initialized for poll commands
      Revert "nvme-pci: don't create a read hctx mapping without read queues"
      nvme: fix multipath crash when ANA is deactivated
      nvme: fix memory leak caused by incorrect subsystem free
      nvme: ignore subnqn for ADATA SX6000LNP
      drbd: dynamically allocate shash descriptor
      block: blk-mq: Remove blk_mq_sched_started_request and started_request
      bcache: fix possible memory leak in bch_cached_dev_run()
      io_uring: track io length in async_list based on bytes
      io_uring: don't use iov_iter_advance() for fixed buffers
      block: properly handle IOCB_NOWAIT for async O_DIRECT IO
      blk-mq: allow REQ_NOWAIT to return an error inline
      io_uring: add a memory barrier before atomic_read
      rq-qos: use a mb for got_token
      rq-qos: set ourself TASK_UNINTERRUPTIBLE after we schedule
      rq-qos: don't reset has_sleepers on spurious wakeups
      rq-qos: fix missed wake-ups in rq_qos_throttle
      wait: add wq_has_single_sleeper helper
      block, bfq: check also in-flight I/O in dispatch plugging
      block: fix sysfs module parameters directory path in comment