linux-kernel - [PATCH v3 00/18] locking/lockdep: Add comments and make some code

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Message-Id: <20190321075725.14054-1-duyuyang@gmail.com>
Date:   Thu, 21 Mar 2019 15:57:07 +0800
From:   Yuyang Du <duyuyang@...il.com>
To:     peterz@...radead.org, will.deacon@....com, mingo@...nel.org
Cc:     bvanassche@....org, ming.lei@...hat.com,
        linux-kernel@...r.kernel.org, joe@...ches.com,
        Yuyang Du <duyuyang@...il.com>
Subject: [PATCH v3 00/18] locking/lockdep: Add comments and make some code

Hi Peter,

I recently looked at some system hang issues. While at it, I tried to use
and understand lockdep. These patches are made as a result. I believe they
should have helped me, so hopefully they do for others as well.

Many thanks to Bart, Joe, and Peter for their valuable comments.

Change from v2:
- Removed indent adjustments only patch
- Removed unnecessary if to else-if patch
- Made changes according to comments
- Added another doc addition patch

Change from v1:
- Rebased the patch series.
- Added more no-functional-change patches.
- Removed zapped locks in lock chains printing patch, which was a band-aid.
  The real problem was recently fixed by Bart.

Thanks,
Yuyang

--

Yuyang Du (18):
  locking/lockdep: Change all print_*() return type to void
  locking/lockdep: Add description and explanation in lockdep design doc
  locking/lockdep: Adjust lock usage bit character checks
  locking/lockdep: Remove useless conditional macro
  locking/lockdep: Print the right depth for chain key colission
  locking/lockdep: Update obsolete struct field description
  locking/lockdep: Use lockdep_init_task for task initiation
    consistently
  locking/lockdep: Define INITIAL_CHAIN_KEY for chain keys to start with
  locking/lockdep: Change the range of class_idx in held_lock struct
  locking/lockdep: Remove unused argument in validate_chain() and    
    check_deadlock()
  locking/lockdep: Update comment
  locking/lockdep: Remove unnecessary function pointer argument
  locking/lockdep: Change type of the element field in circular_queue
  locking/lockdep: Change the return type of __cq_dequeue()
  locking/lockdep: Avoid constant checks in __bfs by using offset
    reference
  locking/lockdep: Combine check_noncircular and check_redundant
  locking/lockdep: Update comments on dependency search
  locking/lockdep: Add explanation to lock usage rules in lockdep design
    doc

 Documentation/locking/lockdep-design.txt | 115 ++++++--
 include/linux/lockdep.h                  |  30 +-
 init/init_task.c                         |   2 +
 kernel/fork.c                            |   3 -
 kernel/locking/lockdep.c                 | 487 +++++++++++++++++--------------
 kernel/locking/lockdep_internals.h       |   1 +
 6 files changed, 378 insertions(+), 260 deletions(-)

-- 
1.8.3.1