[PATCH -next 0/4] block/rq_qos: protect rq_qos apis with global mutex

[Yu Kuai]

From: Yu Kuai <yukuai3@xxxxxxxxxx>

This patchset is a new version, use a different solution suggested by
Tejun in [1].

[1] https://lore.kernel.org/all/Y6DP3aOSad8+D1yY@xxxxxxxxxxxxxxx/

Yu Kuai (4):
  block/rq_qos: move implementions of init/exit rq-qos apis to
    blk-rq-qos.c
  block/rq_qos: factor out a helper to add rq_qos and activate policy
  block/rq_qos: use a global mutex to protect rq_qos apis
  block/rq_qos: fail rq_qos_add() after rq_qos_exit()

 block/blk-iocost.c    |  14 +----
 block/blk-iolatency.c |   7 +--
 block/blk-rq-qos.c    | 118 ++++++++++++++++++++++++++++++++++++++++--
 block/blk-rq-qos.h    |  69 +++---------------------
 4 files changed, 125 insertions(+), 83 deletions(-)

-- 
2.31.1