block: remove AioContext locking

This is the big patch that removes
aio_context_acquire()/aio_context_release() from the block layer and
affected block layer users.

There isn't a clean way to split this patch and the reviewers are likely
the same group of people, so I decided to do it in one patch.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Paul Durrant <paul@xen.org>
Message-ID: <20231205182011.1976568-7-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 0 insertions, 3 deletions

diff --git a/migration/migration-hmp-cmds.c b/migration/migration-hmp-cmds.c
index 86ae832176..99710c8ffb 100644
--- a/migration/migration-hmp-cmds.c
+++ b/migration/migration-hmp-cmds.c
@@ -852,14 +852,11 @@ static void vm_completion(ReadLineState *rs, const char *str)
 
     for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
         SnapshotInfoList *snapshots, *snapshot;
-        AioContext *ctx = bdrv_get_aio_context(bs);
         bool ok = false;
 
-        aio_context_acquire(ctx);
         if (bdrv_can_snapshot(bs)) {
             ok = bdrv_query_snapshot_info_list(bs, &snapshots, NULL) == 0;
         }
-        aio_context_release(ctx);
         if (!ok) {
             continue;
         }