[PATCH 0/2] locking/lockdep: Support dynamic lockdep keys

[Bart Van Assche]

Hi Ingo,

As you may know some false positive lockdep reports are the result of the
requirement to associate the same static lockdep key with all instances
of a locking object. Recently I encountered a lockdep false positive for
which I found no elegant way to suppress it other than by modifying the
lockdep implementation. Hence this series with two patches: one that
modifies lockdep and another patch that shows the false positive I and
others ran into and that also shows how to suppress that false positive.

Please keep in mind that I'm not a lockdep expert and hence that I'm not
sure whether the approach of patch 1/2 is correct.

Thanks,

Bart.

Bart Van Assche (2):
  locking/lockdep: Add support for dynamic depmaps and keys
  kernel/workqueue: Use dynamic lockdep keys for workqueues

 include/linux/lockdep.h   |  2 ++
 include/linux/workqueue.h | 28 ++++-------------------
 kernel/locking/lockdep.c  | 16 ++++++++++---
 kernel/workqueue.c        | 48 ++++++++++++++++++++++++++++++++-------
 4 files changed, 59 insertions(+), 35 deletions(-)

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2.19.1.930.g4563a0d9d0-goog