format_op         902 dev/ata/wd.c   		struct format_op *fop;
format_op         906 dev/ata/wd.c   		fop = (struct format_op *)addr;
format_op         384 sys/disklabel.h struct format_op {
format_op          48 sys/dkio.h     #define DIOCRFORMAT	_IOWR('d', 105, struct format_op)
format_op          49 sys/dkio.h     #define DIOCWFORMAT	_IOWR('d', 106, struct format_op)