[igt-dev] [PATCH i-g-t v29 02/36] lib/igt_list: Add igt_list_for_each_entry_safe_reverse

[Zbigniew Kempczyński]

From: Dominik Grzegorzek <dominik.grzegorzek at intel.com>

Added safe version of reversed iteration over igt_list.

Signed-off-by: Dominik Grzegorzek <dominik.grzegorzek at intel.com>
Cc: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
---
 lib/igt_list.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/igt_list.h b/lib/igt_list.h
index cc93d7a0d..be63fd806 100644
--- a/lib/igt_list.h
+++ b/lib/igt_list.h
@@ -108,6 +108,12 @@ bool igt_list_empty(const struct igt_list_head *head);
 	     &pos->member != (head);					\
 	     pos = igt_container_of((pos)->member.prev, pos, member))
 
+#define igt_list_for_each_entry_safe_reverse(pos, tmp, head, member)	\
+	for (pos = igt_container_of((head)->prev, pos, member),		\
+	     tmp = igt_container_of((pos)->member.prev, tmp, member);	\
+	     &pos->member != (head);					\
+	     pos = tmp,							\
+	     tmp = igt_container_of((pos)->member.prev, tmp, member))
 
 /* IGT custom helpers */
 
-- 
2.26.0