[PATCH] Releasing resources with children

[willy@parisc-linux.org (Matthew Wilcox)]

Releasing resources with children

What does it mean to release a resource with children?  Should the
children become children of the released resource's parent?  Should they
be released too?  Should we fail the release?

I bet we have no callers who expect this right now, but with
insert_resource() we may get some.  At the point where someone hits this
BUG we can figure out what semantics we want.

Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>

diff -urpNX dontdiff linux-2.6.11-bk10/kernel/resource.c parisc-2.6-bk/kernel/resource.c
--- linux-2.6.11-bk10/kernel/resource.c	2005-03-14 06:44:08.205342005 -0700
+++ parisc-2.6-bk/kernel/resource.c	2005-03-14 07:07:54.000000000 -0700
@@ -181,6 +181,8 @@ static int __release_resource(struct res
 {
 	struct resource *tmp, **p;
 
+	BUG_ON(old->child);
+
 	p = &old->parent->child;
 	for (;;) {
 		tmp = *p;