In this patch series, we separated out the MCS lock code which was
previously embedded in the mutex.c. This allows for easier reuse of
MCS lock in other places like rwsem and qrwlock. We also did some micro
optimizations and barrier cleanup.
This patches were previously part of the rwsem optimization patch series
but now we spearate them out.
Tim Chen
v4:
1. Move patch series to the latest tip after v3.12
v3:
1. modified memory barriers to support non x86 architectures that have
weak memory ordering.
v2:
1. change export mcs_spin_lock as a GPL export symbol
2. corrected mcs_spin_lock to references
Jason Low (2):
MCS Lock: optimizations and extra comments
MCS Lock: Barrier corrections
Tim Chen (1):
MCS Lock: Restructure the MCS lock defines and locking code into its
own file
Waiman Long (2):
MCS Lock: Make mcs_spinlock.h includable in other files
MCS Lock: Allow architecture specific memory barrier in lock/unlock
arch/x86/include/asm/barrier.h | 6 +++
include/linux/mcs_spinlock.h | 25 ++++++++++
include/linux/mutex.h | 5 +-
kernel/locking/Makefile | 6 +-
kernel/locking/mcs_spinlock.c | 96 ++++++++++++++++++++++++++++++++++++++++
kernel/locking/mutex.c | 60 +++----------------------
6 files changed, 140 insertions(+), 58 deletions(-)
create mode 100644 include/linux/mcs_spinlock.h
create mode 100644 kernel/locking/mcs_spinlock.c
--
1.7.4.4
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