From: Zhao Liu <zhao1....@intel.com>

The error_vprepend() should use ERRP_GUARD() just as the documentation
of ERRP_GUARD() says:

> It must be used when the function dereferences @errp or passes
> @errp to error_prepend(), error_vprepend(), or error_append_hint().

Considering that error_vprepend() is also an API provided in error.h,
it is necessary to add it to the description of the rules for using
ERRP_GUARD().

Signed-off-by: Zhao Liu <zhao1....@intel.com>
---
 include/qapi/error.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/qapi/error.h b/include/qapi/error.h
index f21a231bb1a6..b1b389967f92 100644
--- a/include/qapi/error.h
+++ b/include/qapi/error.h
@@ -207,7 +207,7 @@
  *
  * Without ERRP_GUARD(), use of the @errp parameter is restricted:
  * - It must not be dereferenced, because it may be null.
- * - It should not be passed to error_prepend() or
+ * - It should not be passed to error_prepend(), error_vprepend() or
  *   error_append_hint(), because that doesn't work with &error_fatal.
  * ERRP_GUARD() lifts these restrictions.
  *
-- 
2.34.1


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