Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 include/block/block_backup.h | 4 ++--
 block/backup.c               | 9 ++++++---
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/include/block/block_backup.h b/include/block/block_backup.h
index 8a759477a3..415cf8519d 100644
--- a/include/block/block_backup.h
+++ b/include/block/block_backup.h
@@ -27,12 +27,12 @@ typedef struct CowRequest {
     CoQueue wait_queue; /* coroutines blocked on this request */
 } CowRequest;
 
-void backup_wait_for_overlapping_requests(BlockJob *job, int64_t sector_num,
+void coroutine_fn backup_wait_for_overlapping_requests(BlockJob *job, int64_t sector_num,
                                           int nb_sectors);
 void backup_cow_request_begin(CowRequest *req, BlockJob *job,
                               int64_t sector_num,
                               int nb_sectors);
-void backup_cow_request_end(CowRequest *req);
+void coroutine_fn backup_cow_request_end(CowRequest *req);
 
 void backup_do_checkpoint(BlockJob *job, Error **errp);
 
diff --git a/block/backup.c b/block/backup.c
index 5387fbd84e..58ddd80b3f 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -84,7 +84,8 @@ static void cow_request_begin(CowRequest *req, BackupBlockJob *job,
 }
 
 /* Forget about a completed request */
-static void cow_request_end(CowRequest *req)
+static void coroutine_fn
+cow_request_end(CowRequest *req)
 {
     QLIST_REMOVE(req, list);
     qemu_co_queue_restart_all(&req->wait_queue);
@@ -275,7 +276,8 @@ void backup_do_checkpoint(BlockJob *job, Error **errp)
     bitmap_zero(backup_job->done_bitmap, len);
 }
 
-void backup_wait_for_overlapping_requests(BlockJob *job, int64_t sector_num,
+void coroutine_fn
+backup_wait_for_overlapping_requests(BlockJob *job, int64_t sector_num,
                                           int nb_sectors)
 {
     BackupBlockJob *backup_job = container_of(job, BackupBlockJob, common);
@@ -304,7 +306,8 @@ void backup_cow_request_begin(CowRequest *req, BlockJob *job,
     cow_request_begin(req, backup_job, start, end);
 }
 
-void backup_cow_request_end(CowRequest *req)
+void coroutine_fn
+backup_cow_request_end(CowRequest *req)
 {
     cow_request_end(req);
 }
-- 
2.13.1.395.gf7b71de06

On Wed, Jul 05, 2017 at 12:03:26AM +0200, Marc-André Lureau wrote:
> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> ---
>  include/block/block_backup.h | 4 ++--
>  block/backup.c               | 9 ++++++---
>  2 files changed, 8 insertions(+), 5 deletions(-)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>