[PATCH v4 18/25] block/coroutines: I/O API

[Emanuele Giuseppe Esposito]

block coroutines functions run in different aiocontext, and are
not protected by the BQL. Therefore are I/O.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 block/coroutines.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/block/coroutines.h b/block/coroutines.h
index c8c14a29c8..c61abd271a 100644
--- a/block/coroutines.h
+++ b/block/coroutines.h
@@ -29,6 +29,12 @@
 
 /* For blk_bs() in generated block/block-gen.c */
 #include "sysemu/block-backend.h"
+/*
+ * I/O API functions. These functions are thread-safe.
+ *
+ * See include/block/block-io.h for more information about
+ * the I/O API.
+ */
 
 int coroutine_fn bdrv_co_check(BlockDriverState *bs,
                                BdrvCheckResult *res, BdrvCheckMode fix);
-- 
2.27.0