The use of atomic_t for nr_valid_paths, pg_init_in_progress and
pg_init_count will allow relaxing the use of the m->lock spinlock.
Suggested-by: NHannes Reinecke <hare@suse.de>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Tested-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMike Snitzer <snitzer@redhat.com>