- Skip providers with 0 sectorsize.
- Make kern.geom.label.debug sysctl tunable.

diff -u label/g_label.c /sys/geom/label/g_label.c
--- label/g_label.c	Mon Aug  9 13:14:24 2004
+++ sys/geom/label/g_label.c	Mon Aug 30 20:50:05 2004
@@ -25,7 +25,7 @@
  */
 
 #include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/sys/geom/label/g_label.c,v 1.7 2004/08/09 11:14:24 pjd Exp $");
+__FBSDID("$FreeBSD: src/sys/geom/label/g_label.c,v 1.9 2004/08/30 18:50:05 pjd Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -44,6 +44,7 @@
 SYSCTL_DECL(_kern_geom);
 SYSCTL_NODE(_kern_geom, OID_AUTO, label, CTLFLAG_RW, 0, "GEOM_LABEL stuff");
 u_int g_label_debug = 0;
+TUNABLE_INT("kern.geom.label.debug", &g_label_debug);
 SYSCTL_UINT(_kern_geom_label, OID_AUTO, debug, CTLFLAG_RW, &g_label_debug, 0,
     "Debug level");
 
@@ -201,6 +202,9 @@
 
 	G_LABEL_DEBUG(2, "Tasting %s.", pp->name);
 
+	/* Skip providers with 0 sectorsize. */
+	if (pp->sectorsize == 0)
+		return (NULL);
 	if (strcmp(pp->geom->class->name, mp->name) == 0)
 		return (NULL);