239 	struct z_stream_s zstream;  member
245 	struct z_stream_s *zstream = &c->zstream;  in compress_init()  local
250 	zstream->workspace =  in compress_init()
253 	if (!zstream->workspace) {  in compress_init()
267 	struct z_stream_s *zstream = &c->zstream;  in compress_start()  local
268 	void *workspace = zstream->workspace;  in compress_start()
270 	memset(zstream, 0, sizeof(*zstream));  in compress_start()
271 	zstream->workspace = workspace;  in compress_start()
273 	return zlib_deflateInit(zstream, Z_DEFAULT_COMPRESSION) == Z_OK;  in compress_start()
296 	struct z_stream_s *zstream = &c->zstream;  in compress_page()  local
298 	zstream->next_in = src;  in compress_page()
300 		zstream->next_in = c->tmp;  in compress_page()
301 	zstream->avail_in = PAGE_SIZE;  in compress_page()
304 		if (zstream->avail_out == 0) {  in compress_page()
305 			zstream->next_out = compress_next_page(c, dst);  in compress_page()
306 			if (IS_ERR(zstream->next_out))  in compress_page()
307 				return PTR_ERR(zstream->next_out);  in compress_page()
309 			zstream->avail_out = PAGE_SIZE;  in compress_page()
312 		if (zlib_deflate(zstream, Z_NO_FLUSH) != Z_OK)  in compress_page()
316 	} while (zstream->avail_in);  in compress_page()
319 	if (0 && zstream->total_out > zstream->total_in)  in compress_page()
328 	struct z_stream_s *zstream = &c->zstream;  in compress_flush()  local
331 		switch (zlib_deflate(zstream, Z_FINISH)) {  in compress_flush()
333 			zstream->next_out = compress_next_page(c, dst);  in compress_flush()
334 			if (IS_ERR(zstream->next_out))  in compress_flush()
335 				return PTR_ERR(zstream->next_out);  in compress_flush()
337 			zstream->avail_out = PAGE_SIZE;  in compress_flush()
349 	memset(zstream->next_out, 0, zstream->avail_out);  in compress_flush()
350 	dst->unused = zstream->avail_out;  in compress_flush()
356 	zlib_deflateEnd(&c->zstream);  in compress_finish()
361 	kfree(c->zstream.workspace);  in compress_fini()