[PATCH v4 01/11] block-copy: add missing coroutine_fn annotations

[Emanuele Giuseppe Esposito <eesposit@redhat.com>]

These functions end up calling bdrv_common_block_status_above(), a
generated_co_wrapper function.
In addition, they also happen to be always called in coroutine context,
meaning all callers are coroutine_fn.
This means that the g_c_w function will enter the qemu_in_coroutine()
case and eventually suspend (or in other words call qemu_coroutine_yield()).
Therefore we need to mark such functions coroutine_fn too.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
 block/block-copy.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/block/block-copy.c b/block/block-copy.c
index bb947afdda..f33ab1d0b6 100644
--- a/block/block-copy.c
+++ b/block/block-copy.c
@@ -577,8 +577,9 @@ static coroutine_fn int block_copy_task_entry(AioTask *task)
     return ret;
 }
 
-static int block_copy_block_status(BlockCopyState *s, int64_t offset,
-                                   int64_t bytes, int64_t *pnum)
+static coroutine_fn int block_copy_block_status(BlockCopyState *s,
+                                                int64_t offset,
+                                                int64_t bytes, int64_t *pnum)
 {
     int64_t num;
     BlockDriverState *base;
@@ -613,8 +614,9 @@ static int block_copy_block_status(BlockCopyState *s, int64_t offset,
  * Check if the cluster starting at offset is allocated or not.
  * return via pnum the number of contiguous clusters sharing this allocation.
  */
-static int block_copy_is_cluster_allocated(BlockCopyState *s, int64_t offset,
-                                           int64_t *pnum)
+static int coroutine_fn block_copy_is_cluster_allocated(BlockCopyState *s,
+                                                        int64_t offset,
+                                                        int64_t *pnum)
 {
     BlockDriverState *bs = s->source->bs;
     int64_t count, total_count = 0;
@@ -669,8 +671,9 @@ void block_copy_reset(BlockCopyState *s, int64_t offset, int64_t bytes)
  * @return 0 when the cluster at @offset was unallocated,
  *         1 otherwise, and -ret on error.
  */
-int64_t block_copy_reset_unallocated(BlockCopyState *s,
-                                     int64_t offset, int64_t *count)
+int64_t coroutine_fn block_copy_reset_unallocated(BlockCopyState *s,
+                                                  int64_t offset,
+                                                  int64_t *count)
 {
     int ret;
     int64_t clusters, bytes;
-- 
2.31.1