209 	struct z_stream_s zstream;  member
215 	struct z_stream_s *zstream = memset(&c->zstream, 0, sizeof(c->zstream));  in compress_init()  local
217 	zstream->workspace =  in compress_init()
220 	if (!zstream->workspace)  in compress_init()
223 	if (zlib_deflateInit(zstream, Z_DEFAULT_COMPRESSION) != Z_OK) {  in compress_init()
224 		kfree(zstream->workspace);  in compress_init()
253 	struct z_stream_s *zstream = &c->zstream;  in compress_page()  local
255 	zstream->next_in = src;  in compress_page()
257 		zstream->next_in = c->tmp;  in compress_page()
258 	zstream->avail_in = PAGE_SIZE;  in compress_page()
261 		if (zstream->avail_out == 0) {  in compress_page()
262 			zstream->next_out = compress_next_page(dst);  in compress_page()
263 			if (IS_ERR(zstream->next_out))  in compress_page()
264 				return PTR_ERR(zstream->next_out);  in compress_page()
266 			zstream->avail_out = PAGE_SIZE;  in compress_page()
269 		if (zlib_deflate(zstream, Z_NO_FLUSH) != Z_OK)  in compress_page()
271 	} while (zstream->avail_in);  in compress_page()
274 	if (0 && zstream->total_out > zstream->total_in)  in compress_page()
283 	struct z_stream_s *zstream = &c->zstream;  in compress_flush()  local
286 		switch (zlib_deflate(zstream, Z_FINISH)) {  in compress_flush()
288 			zstream->next_out = compress_next_page(dst);  in compress_flush()
289 			if (IS_ERR(zstream->next_out))  in compress_flush()
290 				return PTR_ERR(zstream->next_out);  in compress_flush()
292 			zstream->avail_out = PAGE_SIZE;  in compress_flush()
304 	memset(zstream->next_out, 0, zstream->avail_out);  in compress_flush()
305 	dst->unused = zstream->avail_out;  in compress_flush()
312 	struct z_stream_s *zstream = &c->zstream;  in compress_fini()  local
314 	zlib_deflateEnd(zstream);  in compress_fini()
315 	kfree(zstream->workspace);  in compress_fini()