nbd/server: Kill pointless shadowed variable

lgtm.com pointed out that commit 678ba275 introduced a shadowed
declaration of local variable 'bs'; thankfully, the inner 'bs'
obtained by 'blk_bs(blk)' matches the outer one given that we had
'blk_insert_bs(blk, bs, errp)' a few lines earlier, and there are
no later uses of 'bs' beyond the scope of the 'if (bitmap)' to
care if we change the value stored in 'bs' while traveling the
backing chain to find a bitmap.  So simply get rid of the extra
declaration.

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190207191357.6665-1-eblake@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>

diff --git a/nbd/server.c b/nbd/server.c
index 838c150d8ca3abb53ceee52f84b23817608d2859..0910d09a6d4eb7b7ceadbca768cc8bb2c51cf288 100644 (file)
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -1495,7 +1495,6 @@ NBDExport *nbd_export_new(BlockDriverState *bs, uint64_t dev_offset,
 
     if (bitmap) {
         BdrvDirtyBitmap *bm = NULL;
-        BlockDriverState *bs = blk_bs(blk);
 
         while (true) {
             bm = bdrv_find_dirty_bitmap(bs, bitmap);