272 	zio_transform_t *zt = kmem_alloc(sizeof (zio_transform_t), KM_SLEEP);  in zio_push_transform()  local
274 	zt->zt_orig_data = zio->io_data;  in zio_push_transform()
275 	zt->zt_orig_size = zio->io_size;  in zio_push_transform()
276 	zt->zt_bufsize = bufsize;  in zio_push_transform()
277 	zt->zt_transform = transform;  in zio_push_transform()
279 	zt->zt_next = zio->io_transform_stack;  in zio_push_transform()
280 	zio->io_transform_stack = zt;  in zio_push_transform()
289 	zio_transform_t *zt;  in zio_pop_transforms()  local
291 	while ((zt = zio->io_transform_stack) != NULL) {  in zio_pop_transforms()
292 		if (zt->zt_transform != NULL)  in zio_pop_transforms()
293 			zt->zt_transform(zio,  in zio_pop_transforms()
294 			    zt->zt_orig_data, zt->zt_orig_size);  in zio_pop_transforms()
296 		if (zt->zt_bufsize != 0)  in zio_pop_transforms()
297 			zio_buf_free(zio->io_data, zt->zt_bufsize);  in zio_pop_transforms()
299 		zio->io_data = zt->zt_orig_data;  in zio_pop_transforms()
300 		zio->io_size = zt->zt_orig_size;  in zio_pop_transforms()
301 		zio->io_transform_stack = zt->zt_next;  in zio_pop_transforms()
303 		kmem_free(zt, sizeof (zio_transform_t));  in zio_pop_transforms()