[src/trunk]: src/sys/external/bsd/drm2/drm Make sure rbtrees are empty on des...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3dac6cd29c94
branches:  trunk
changeset: 344770:3dac6cd29c94
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Tue Apr 19 02:52:29 2016 +0000

description:
Make sure rbtrees are empty on desctruction.

If related to PR kern/51076, might help catch the bug a bit earlier.

diffstat:

 sys/external/bsd/drm2/drm/drm_vma_manager.c |  8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diffs (36 lines):

diff -r da134d7d6b3c -r 3dac6cd29c94 sys/external/bsd/drm2/drm/drm_vma_manager.c
--- a/sys/external/bsd/drm2/drm/drm_vma_manager.c       Mon Apr 18 19:37:41 2016 +0000
+++ b/sys/external/bsd/drm2/drm/drm_vma_manager.c       Tue Apr 19 02:52:29 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: drm_vma_manager.c,v 1.3 2015/06/19 22:51:57 chs Exp $  */
+/*     $NetBSD: drm_vma_manager.c,v 1.4 2016/04/19 02:52:29 riastradh Exp $    */
 
 /*-
  * Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: drm_vma_manager.c,v 1.3 2015/06/19 22:51:57 chs Exp $");
+__KERNEL_RCSID(0, "$NetBSD: drm_vma_manager.c,v 1.4 2016/04/19 02:52:29 riastradh Exp $");
 
 #include <sys/kmem.h>
 #include <sys/rbtree.h>
@@ -120,6 +120,8 @@
 {
 
        vmem_destroy(mgr->vom_vmem);
+       KASSERTMSG((RB_TREE_MIN(&mgr->vom_nodes) == NULL),
+           "drm vma offset manager %p not empty", mgr);
 #if 0
        rb_tree_destroy(&mgr->vom_nodes);
 #endif
@@ -143,6 +145,8 @@
 drm_vma_node_destroy(struct drm_vma_offset_node *node)
 {
 
+       KASSERTMSG((RB_TREE_MIN(&node->von_files) == NULL),
+           "drm vma node %p not empty", node);
 #if 0
        rb_tree_destroy(&node->von_files);
 #endif