FreeBSD/sys/boot/usb/usb_busdma_loader.c
/*------------------------------------------------------------------------*
 *	usb_pc_free_mem - free DMA memory
 *
 * This function is NULL safe.
 *------------------------------------------------------------------------*/
free DMA memory
This function is NULL safe.
free DMA memory This function is NULL safe .
void
usb_pc_free_mem(struct usb_page_cache *pc)
{
	if (pc != NULL && pc->buffer != NULL) {
		free(pc->tag, XXX);
		pc->buffer = NULL;
	}
}
void usb_pc_free_mem ( struct usb_page_cache * pc ) { if ( pc != NULL && pc -> buffer != NULL ) { free ( pc -> tag , XXX ) ; pc -> buffer = NULL ; } }
usb_pc_free_mem - free DMA memory
 This function is NULL safe.
usb_pc_free_mem - free DMA memory This function is NULL safe .