If the head of a list has been moved to a different memory location, the
le_prev link in the first list entry has to be fixed up. Provide a macro
that implements this fixup.
Signed-off-by: Kevin Wolf <kw...@redhat.com>
Reviewed-by: Eric Blake <ebl...@redhat.com>
Reviewed-by: Max Reitz <mre...@redhat.com>
---
include/qemu/queue.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/qemu/queue.h b/include/qemu/queue.h
index f781aa2..a8d3cb8 100644
--- a/include/qemu/queue.h
+++ b/include/qemu/queue.h
@@ -117,6 +117,12 @@ struct {
\
} \
} while (/*CONSTCOND*/0)
+#define QLIST_FIX_HEAD_PTR(head, field) do { \
+ if ((head)->lh_first != NULL) { \
+ (head)->lh_first->field.le_prev = &(head)->lh_first; \
+ } \
+} while (/*CONSTCOND*/0)
+
#define QLIST_INSERT_AFTER(listelm, elm, field) do { \
if (((elm)->field.le_next = (listelm)->field.le_next) != NULL) \
(listelm)->field.le_next->field.le_prev = \
--
1.8.3.1
