[PATCH 0/8] locking: Various updates

[Davidlohr Bueso]

Hello,

A little bit of everything really, with the last two patches being
the most interesting ones.

Patch 1 fixes a silly typo.
Patches 2-5 cleanup a bit of ww mutex code.
Patch 6 isolates osq code.
Patch 7 uses the brand new READ/ASSIGN_ONCE primitives.
Patch 8 is a performance patch and gets rid of barrier calls when
        polling for the (osq) lock.

More details obviously in the individual patches. Applies on today's -tip.

Please consider for 3.20, thanks!

Davidlohr Bueso (8):
  Documentation/memory-barriers.txt: Fix smp typo
  locking/mutex: Get rid of use_ww_cxt param in common paths
  locking/mutex: Checking the stamp is ww only
  locking/mutex: Delete useless comment
  locking/mutex: Introduce ww_mutex_set_context_slowpath
  locking/mcs: Better differentiate between mcs variants
  locking: Use [READ,ASSIGN]_ONCE() for non-scalar types
  locking/osq: No need for load/acquire when acquire-polling

 Documentation/memory-barriers.txt |   2 +-
 include/linux/osq_lock.h          |  12 ++-
 kernel/Kconfig.locks              |   4 +
 kernel/locking/Makefile           |   3 +-
 kernel/locking/mcs_spinlock.c     | 208 --------------------------------------
 kernel/locking/mcs_spinlock.h     |  22 +---
 kernel/locking/mutex.c            |  99 +++++++++---------
 kernel/locking/osq_lock.c         | 203 +++++++++++++++++++++++++++++++++++++
 kernel/locking/rwsem-xadd.c       |   4 +-
 9 files changed, 276 insertions(+), 281 deletions(-)
 delete mode 100644 kernel/locking/mcs_spinlock.c
 create mode 100644 kernel/locking/osq_lock.c

-- 
2.1.2

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