diff --git a/block/block-backend.c b/block/block-backend.c
index f3d6525923..d4a5df2ac2 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -1354,7 +1354,7 @@ int coroutine_fn blk_co_preadv_part(BlockBackend *blk, int64_t offset,
 }
 
 /* To be called between exactly one pair of blk_inc/dec_in_flight() */
-int coroutine_fn
+static int coroutine_fn
 blk_co_do_pwritev_part(BlockBackend *blk, int64_t offset, int64_t bytes,
                        QEMUIOVector *qiov, size_t qiov_offset,
                        BdrvRequestFlags flags)
@@ -1687,7 +1687,7 @@ BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf,
 }
 
 /* To be called between exactly one pair of blk_inc/dec_in_flight() */
-int coroutine_fn
+static int coroutine_fn
 blk_co_do_pdiscard(BlockBackend *blk, int64_t offset, int64_t bytes)
 {
     int ret;
@@ -1735,7 +1735,7 @@ int coroutine_fn blk_co_pdiscard(BlockBackend *blk, int64_t offset,
 }
 
 /* To be called between exactly one pair of blk_inc/dec_in_flight() */
-int coroutine_fn blk_co_do_flush(BlockBackend *blk)
+static int coroutine_fn blk_co_do_flush(BlockBackend *blk)
 {
     blk_wait_while_drained(blk);
     IO_CODE();
diff --git a/block/coroutines.h b/block/coroutines.h
index d66551a277..3a2bad564f 100644
--- a/block/coroutines.h
+++ b/block/coroutines.h
@@ -63,17 +63,6 @@ nbd_co_do_establish_connection(BlockDriverState *bs, bool blocking,
                                Error **errp);
 
 
-int coroutine_fn
-blk_co_do_pwritev_part(BlockBackend *blk, int64_t offset, int64_t bytes,
-                       QEMUIOVector *qiov, size_t qiov_offset,
-                       BdrvRequestFlags flags);
-
-int coroutine_fn
-blk_co_do_pdiscard(BlockBackend *blk, int64_t offset, int64_t bytes);
-
-int coroutine_fn blk_co_do_flush(BlockBackend *blk);
-
-
 /*
  * "I/O or GS" API functions. These functions can run without
  * the BQL, but only in one specific iothread/main loop.
@@ -82,14 +71,6 @@ int coroutine_fn blk_co_do_flush(BlockBackend *blk);
  * the "I/O or GS" API.
  */
 
-int generated_co_wrapper
-bdrv_preadv(BdrvChild *child, int64_t offset, int64_t bytes,
-            QEMUIOVector *qiov, BdrvRequestFlags flags);
-
-int generated_co_wrapper
-bdrv_pwritev(BdrvChild *child, int64_t offset, int64_t bytes,
-             QEMUIOVector *qiov, BdrvRequestFlags flags);
-
 int generated_co_wrapper
 bdrv_common_block_status_above(BlockDriverState *bs,
                                BlockDriverState *base,