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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