236 	struct z_stream_s zstream;  member
242 	struct z_stream_s *zstream = &c->zstream;  in compress_init()  local
247 	zstream->workspace =  in compress_init()
250 	if (!zstream->workspace) {  in compress_init()
264 	struct z_stream_s *zstream = &c->zstream;  in compress_start()  local
265 	void *workspace = zstream->workspace;  in compress_start()
267 	memset(zstream, 0, sizeof(*zstream));  in compress_start()
268 	zstream->workspace = workspace;  in compress_start()
270 	return zlib_deflateInit(zstream, Z_DEFAULT_COMPRESSION) == Z_OK;  in compress_start()
292 	struct z_stream_s *zstream = &c->zstream;  in compress_page()  local
294 	zstream->next_in = src;  in compress_page()
296 		zstream->next_in = c->tmp;  in compress_page()
297 	zstream->avail_in = PAGE_SIZE;  in compress_page()
300 		if (zstream->avail_out == 0) {  in compress_page()
301 			zstream->next_out = compress_next_page(c, dst);  in compress_page()
302 			if (IS_ERR(zstream->next_out))  in compress_page()
303 				return PTR_ERR(zstream->next_out);  in compress_page()
305 			zstream->avail_out = PAGE_SIZE;  in compress_page()
308 		if (zlib_deflate(zstream, Z_NO_FLUSH) != Z_OK)  in compress_page()
310 	} while (zstream->avail_in);  in compress_page()
313 	if (0 && zstream->total_out > zstream->total_in)  in compress_page()
322 	struct z_stream_s *zstream = &c->zstream;  in compress_flush()  local
325 		switch (zlib_deflate(zstream, Z_FINISH)) {  in compress_flush()
327 			zstream->next_out = compress_next_page(c, dst);  in compress_flush()
328 			if (IS_ERR(zstream->next_out))  in compress_flush()
329 				return PTR_ERR(zstream->next_out);  in compress_flush()
331 			zstream->avail_out = PAGE_SIZE;  in compress_flush()
343 	memset(zstream->next_out, 0, zstream->avail_out);  in compress_flush()
344 	dst->unused = zstream->avail_out;  in compress_flush()
350 	zlib_deflateEnd(&c->zstream);  in compress_finish()
355 	kfree(c->zstream.workspace);  in compress_fini()