2005-12-14 Martin Hunt <hunt@redhat.com>

2005-12-14  Martin Hunt  <hunt@redhat.com>

	* pmap-gen.c (_stp_pmap_new_*): Initialize lock.
	(_stp_pmap_set_*): Lock map while in use.
	(_stp_pmap_add_*): Lock map while in use.
	(_stp_pmap_get_cpu): Ditto.
	(_stp_pmap_get): Lock each per-cpu map.

	* map-gen.c: Define and use NULLRET for a NULL return value.
	* map.c (_stp_pmap_clear): New function.
	(_stp_pmap_agg): Lock each per-cpu map as
	it gets aggregated.