This is safe because of the aio context notifier we'll register on this
node. So allow it.

Signed-off-by: Fam Zheng <famz@redhat.com>
---
 nbd/server.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/nbd/server.c b/nbd/server.c
index 924a1fe..a8f58fb 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -900,8 +900,10 @@ NBDExport *nbd_export_new(BlockDriverState *bs, off_t dev_offset, off_t size,
     if ((nbdflags & NBD_FLAG_READ_ONLY) == 0) {
         perm |= BLK_PERM_WRITE;
     }
-    blk = blk_new(perm, BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE_UNCHANGED |
-                        BLK_PERM_WRITE | BLK_PERM_GRAPH_MOD);
+    blk = blk_new(perm,
+                  BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE_UNCHANGED |
+                  BLK_PERM_WRITE | BLK_PERM_GRAPH_MOD |
+                  BLK_PERM_AIO_CONTEXT_CHANGE);
     ret = blk_insert_bs(blk, bs, errp);
     if (ret < 0) {
         goto fail;
-- 
2.9.3