CVSROOT: /cvs
Module name: src
Changes by: v...@cvs.openbsd.org 2020/07/08 09:53:59
Modified files:
sys/arch/octeon/include: atomic.h
Log message:
Make membar_consumer() a plain compiler barrier in kernel on octeon.
The processor does not perform speculative reads and only one of its
execution pipes should issue memory accesses. As a result, loads should
happen in the correct order without barrier instructions.
Tested on CN5020, CN6120, CN7130 and CN7360.
This diff has been in use on the octeon-based mips64 bulk build cluster
for several months. Also tested in snaps for a while.
