From: "Denis V. Lunev" <den@openvz.org>

This patch makes in_flight field 'unsigned' for BDRVNBDState and
MirrorBlockJob. This matches the definition of this field on BDS
and is generically correct - we should never get negative value here.

Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: John Snow <jsnow@redhat.com>
CC: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
CC: Kevin Wolf <kwolf@redhat.com>
CC: Hanna Reitz <hreitz@redhat.com>
CC: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
---
 block/mirror.c | 2 +-
 block/nbd.c    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/block/mirror.c b/block/mirror.c
index d8ecb9efa2..3c4ab1159d 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -73,7 +73,7 @@ typedef struct MirrorBlockJob {
 
     uint64_t last_pause_ns;
     unsigned long *in_flight_bitmap;
-    int in_flight;
+    unsigned in_flight;
     int64_t bytes_in_flight;
     QTAILQ_HEAD(, MirrorOp) ops_in_flight;
     int ret;
diff --git a/block/nbd.c b/block/nbd.c
index bc8f128087..19e773d602 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -77,7 +77,7 @@ typedef struct BDRVNBDState {
     QemuMutex requests_lock;
     NBDClientState state;
     CoQueue free_sema;
-    int in_flight;
+    unsigned in_flight;
     NBDClientRequest requests[MAX_NBD_REQUESTS];
     QEMUTimer *reconnect_delay_timer;
 
-- 
2.25.1