Also add support for the "name" parameter in mutex_init(). The name
allows for better diagnostics, namely in /proc/lock_stats when
lock debugging is enabled. Nested mutexes are necessary to support
CONFIG_PROVE_LOCKING. ZoL can use mutex_enter_nested()'s "class" argument
to to convey the locking hierarchy.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tim Chase <tim@chase2k.com>
Closes#439
79a0056e13