238 	struct z_stream_s zstream;  member
244 	struct z_stream_s *zstream = &c->zstream;  in compress_init()  local
249 	zstream->workspace =  in compress_init()
252 	if (!zstream->workspace) {  in compress_init()
266 	struct z_stream_s *zstream = &c->zstream;  in compress_start()  local
267 	void *workspace = zstream->workspace;  in compress_start()
269 	memset(zstream, 0, sizeof(*zstream));  in compress_start()
270 	zstream->workspace = workspace;  in compress_start()
272 	return zlib_deflateInit(zstream, Z_DEFAULT_COMPRESSION) == Z_OK;  in compress_start()
295 	struct z_stream_s *zstream = &c->zstream;  in compress_page()  local
297 	zstream->next_in = src;  in compress_page()
299 		zstream->next_in = c->tmp;  in compress_page()
300 	zstream->avail_in = PAGE_SIZE;  in compress_page()
303 		if (zstream->avail_out == 0) {  in compress_page()
304 			zstream->next_out = compress_next_page(c, dst);  in compress_page()
305 			if (IS_ERR(zstream->next_out))  in compress_page()
306 				return PTR_ERR(zstream->next_out);  in compress_page()
308 			zstream->avail_out = PAGE_SIZE;  in compress_page()
311 		if (zlib_deflate(zstream, Z_NO_FLUSH) != Z_OK)  in compress_page()
315 	} while (zstream->avail_in);  in compress_page()
318 	if (0 && zstream->total_out > zstream->total_in)  in compress_page()
327 	struct z_stream_s *zstream = &c->zstream;  in compress_flush()  local
330 		switch (zlib_deflate(zstream, Z_FINISH)) {  in compress_flush()
332 			zstream->next_out = compress_next_page(c, dst);  in compress_flush()
333 			if (IS_ERR(zstream->next_out))  in compress_flush()
334 				return PTR_ERR(zstream->next_out);  in compress_flush()
336 			zstream->avail_out = PAGE_SIZE;  in compress_flush()
348 	memset(zstream->next_out, 0, zstream->avail_out);  in compress_flush()
349 	dst->unused = zstream->avail_out;  in compress_flush()
355 	zlib_deflateEnd(&c->zstream);  in compress_finish()
360 	kfree(c->zstream.workspace);  in compress_fini()