If del_gendisk() is done when some io are still throttled, such io
will not be handled until the throttle is done, which is not
necessary.

Changes in v7:
 - use the new solution as suggested by Ming.

Yu Kuai (2):
  blk-throtl: introduce a new flag THROTL_TG_CANCELING
  block: cancel all throttled bios in del_gendisk()

 block/blk-throttle.c | 49 ++++++++++++++++++++++++++++++++++++++++----
 block/blk-throttle.h |  2 ++
 block/genhd.c        |  2 ++
 3 files changed, 49 insertions(+), 4 deletions(-)

-- 
2.31.1