block/blk-map: Remove set but unused variable 'added'

The variable added is not effectively used in the function, so delete
it.

block/blk-map.c:273:16: warning: variable 'added' set but not used.

Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=2049
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220905063253.120082-1-jiapeng.chong@linux.alibaba.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block/blk-map.c

@@ -270,7 +270,7 @@ static int bio_map_user_iov(struct request *rq, struct iov_iter *iter,
 	while (iov_iter_count(iter)) {
 		struct page **pages, *stack_pages[UIO_FASTIOV];
 		ssize_t bytes;
-		size_t offs, added = 0;
+		size_t offs;
 		int npages;
 
 		if (nr_vecs <= ARRAY_SIZE(stack_pages)) {
@@ -306,7 +306,6 @@ static int bio_map_user_iov(struct request *rq, struct iov_iter *iter,
 					break;
 				}
 
-				added += n;
 				bytes -= n;
 				offs = 0;
 			}