block: mark change_aio_ctx() callback and instances as GRAPH_RDLOCK(_PTR)

This is a small step in preparation to mark bdrv_drained_begin() as
GRAPH_UNLOCKED. More concretely, it is in preparation to move the
drain out of bdrv_change_aio_context() and marking that function as
GRAPH_RDLOCK.

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20250530151125.955508-7-f.ebner@proxmox.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/blockjob.c b/blockjob.c
index 32007f31a9..34185d7715 100644
--- a/blockjob.c
+++ b/blockjob.c
@@ -144,9 +144,9 @@ static TransactionActionDrv change_child_job_context = {
     .clean = g_free,
 };
 
-static bool child_job_change_aio_ctx(BdrvChild *c, AioContext *ctx,
-                                     GHashTable *visited, Transaction *tran,
-                                     Error **errp)
+static bool GRAPH_RDLOCK
+child_job_change_aio_ctx(BdrvChild *c, AioContext *ctx, GHashTable *visited,
+                         Transaction *tran, Error **errp)
 {
     BlockJob *job = c->opaque;
     BdrvStateChildJobContext *s;