Provides the missing full barrier variant to the membar primitive set.
While not used right now, this is probably going to change down the
road.
Name taken from Solaris, to follow the existing routines.
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Closes#13907
402426c7d8