linux-kernel - [PATCH v5 0/9] infiniband: Remove semaphores

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Date:   Mon, 21 Nov 2016 11:38:07 +0530
From:   Binoy Jayan <binoy.jayan@...aro.org>
To:     Doug Ledford <dledford@...hat.com>,
        Sean Hefty <sean.hefty@...el.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Hal Rosenstock <hal.rosenstock@...il.com>,
        Leon Romanovsky <leonro@...lanox.com>,
        Sagi Grimberg <sagig@...lanox.com>,
        Bart Van Assche <bart.vanassche@...disk.com>,
        Nicholas Bellinger <nab@...ux-iscsi.org>,
        Jenny Derzhavetz <jennyf@...lanox.com>,
        Ira Weiny <ira.weiny@...el.com>,
        Steve Wise <swise@...ngridcomputing.com>,
        Mark Bloch <markb@...lanox.com>,
        Tatyana E Nikolova <tatyana.e.nikolova@...el.com>,
        Matan Barak <matanb@...lanox.com>,
        Lijun Ou <oulijun@...wei.com>,
        "Wei Hu(Xavier)" <xavier.huwei@...wei.com>
Cc:     Faisal Latif <faisal.latif@...el.com>,
        Mustafa Ismail <mustafa.ismail@...el.com>,
        Mark Brown <broonie@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
        target-devel@...r.kernel.org, Binoy Jayan <binoy.jayan@...aro.org>
Subject: [PATCH v5 0/9] infiniband: Remove semaphores


Hi,

These are a set of patches [v5] which removes semaphores from infiniband.
These are part of a bigger effort to eliminate all semaphores from the
linux kernel.

v4 --> v5
---------
IB/isert: Replace semaphore sem with completion
  - Modified changelog to support use of completion
IB/mlx5: Simplify completion into a wait_event
  - Avoid this patch.
    As umr_context is on the stack, and we are waiting
    for it to be fully done, it really should be a completion.

v3 -> v4:
---------

IB/mlx5: Added patch - Replace semaphore umr_common:sem with wait_event
IB/mlx5: Fixed a bug pointed out by Leon Romanovsky

v2 -> v3:
---------

IB/mlx5: Move '&umr_context' into helper fn
IB/mthca: Restructure mthca_cmd.c to manage free_head
IB/hns: Restructure hns_roce_cmd.c to manage free_head
IB/core: Convert completion to wait_event
IB/mlx5: Simplify completion into a wait_event

v1 -> v2:
---------

IB/hns   : Use wait_event instead of open coding counting semaphores
IB/mthca : Use wait_event instead of open coding counting semaphores
IB/mthca : Remove mutex_[un]lock from *_cmd_use_events/*_cmd_use_polling
IB/mlx5  : Cleanup, add helper mlx5_ib_post_send_wait

v1
---------
  IB/core: iwpm_nlmsg_request: Replace semaphore with completion
  IB/core: Replace semaphore sm_sem with completion
  IB/hns: Replace semaphore poll_sem with mutex
  IB/mthca: Replace semaphore poll_sem with mutex
  IB/isert: Replace semaphore sem with completion
  IB/hns: Replace counting semaphore event_sem with wait condition
  IB/mthca: Replace counting semaphore event_sem with wait condition
  IB/mlx5: Replace counting semaphore sem with wait condition

Thanks,
Binoy

Binoy Jayan (9):
  IB/core: iwpm_nlmsg_request: Replace semaphore with completion
  IB/core: Replace semaphore sm_sem with an atomic wait
  IB/hns: Replace semaphore poll_sem with mutex
  IB/mthca: Replace semaphore poll_sem with mutex
  IB/isert: Replace semaphore sem with completion
  IB/hns: Replace counting semaphore event_sem with wait_event
  IB/mthca: Replace counting semaphore event_sem with wait_event
  IB/mlx5: Add helper mlx5_ib_post_send_wait
  IB/mlx5: Replace semaphore umr_common:sem with wait_event

 drivers/infiniband/core/iwpm_msg.c          |   8 +-
 drivers/infiniband/core/iwpm_util.c         |   7 +-
 drivers/infiniband/core/iwpm_util.h         |   3 +-
 drivers/infiniband/core/user_mad.c          |  20 +++--
 drivers/infiniband/hw/hns/hns_roce_cmd.c    |  57 +++++++++-----
 drivers/infiniband/hw/hns/hns_roce_device.h |   5 +-
 drivers/infiniband/hw/mlx5/main.c           |   6 +-
 drivers/infiniband/hw/mlx5/mlx5_ib.h        |   7 +-
 drivers/infiniband/hw/mlx5/mr.c             | 117 ++++++++--------------------
 drivers/infiniband/hw/mthca/mthca_cmd.c     |  57 ++++++++------
 drivers/infiniband/hw/mthca/mthca_cmd.h     |   1 +
 drivers/infiniband/hw/mthca/mthca_dev.h     |   5 +-
 drivers/infiniband/ulp/isert/ib_isert.c     |   6 +-
 drivers/infiniband/ulp/isert/ib_isert.h     |   3 +-
 14 files changed, 147 insertions(+), 155 deletions(-)

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