back_ptr          788 arch/um/drivers/ubd_kern.c 	char **back_ptr;
back_ptr          795 arch/um/drivers/ubd_kern.c 	back_ptr = ubd_dev->no_cow ? NULL : &ubd_dev->cow.file;
back_ptr          798 arch/um/drivers/ubd_kern.c 				back_ptr, &ubd_dev->cow.bitmap_offset,