git: kernel - remove spin_lock_rd() and spin_unlock_rd()
commit 8f165b8c6a3e6ec3d65f6cf293a9913233dbd3bb
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Sun Aug 29 23:25:42 2010 -0700
kernel - remove spin_lock_rd() and spin_unlock_rd()
* Remove shared spinlocks entirely. We only have exclusive spinlocks
now.
* Strip out the exclusive/shared contention handling code.
* Slightly rework the initial exponential backoff and test. Do the
atomic swap after the exponential backoff instead of before so
we do not add a superfluous backoff after actually acquiring
the spinlock.
Summary of changes:
sys/kern/kern_ktr.c | 6 --
sys/kern/kern_spinlock.c | 134 ++++-------------------------------------
sys/kern/lwkt_thread.c | 4 -
sys/kern/usched_bsd4.c | 1 -
sys/platform/pc32/isa/clock.c | 3 +-
sys/platform/pc64/isa/clock.c | 3 +-
sys/sys/globaldata.h | 2 +-
sys/sys/spinlock2.h | 85 ++------------------------
8 files changed, 20 insertions(+), 218 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/8f165b8c6a3e6ec3d65f6cf293a9913233dbd3bb
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