usb_filt
static STAILQ_HEAD(,usb_filt) usb_filt_head =
struct usb_filt *puf;
puf = malloc(sizeof(struct usb_filt));
struct usb_filt *puf;
struct usb_filt *puf;
struct usb_filt *puf;
STAILQ_ENTRY(usb_filt) entry;