[PATCH for-6.12 0/7] block, bfq: bfqq merge chain fixes and cleanup

[Yu Kuai]

From: Yu Kuai <yukuai3@xxxxxxxxxx>

Patch 1 fixes a problem found by xfstests generic/323, tested on scsi
disk with bfq.
Patch 2 fixes a problem while digging the above problem, by a debug patch
to print procress reference.
Patch 3-7 are cleanups while reviewing code.

Yu Kuai (7):
  block, bfq: fix uaf for accessing waker_bfqq after splitting
  block, bfq: fix procress reference leakage for bfqq in merge chain
  block, bfq: merge bfq_release_process_ref() into bfq_put_cooperator()
  block, bfq: remove bfq_log_bfqg()
  block, bfq: remove local variable 'split' in bfq_init_rq()
  block, bfq: remove local variable 'bfqq_already_existing' in
    bfq_init_rq()
  block, bfq: factor out a helper to split bfqq in bfq_init_rq()

 block/bfq-cgroup.c  |   1 -
 block/bfq-iosched.c | 191 ++++++++++++++++++++++++--------------------
 block/bfq-iosched.h |   6 --
 3 files changed, 103 insertions(+), 95 deletions(-)

-- 
2.39.2