On Mon, Jul 26, 2021 at 02:34:54PM +0800, Qu Wenruo wrote:

+	while (cur_offset < decompressed + buf_len) {
+		struct bio_vec bvec = bio_iter_iovec(orig_bio,
+						     orig_bio->bi_iter);
+		size_t copy_len;
+		u32 copy_start;
+		u32 bvec_offset; /* Offset inside the full decompressed extent */

Please put such comments on a separate line, before the variable
declaration.