[PATCH] list_del debug check
A list_del() debugging check. Has been in -mm for years. Dave moved
list_del() out-of-line in the debug case, so this is now suitable for
mainline.
Cc: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/lib/list_debug.c b/lib/list_debug.c
index 1aae85c..e80d27c 100644
--- a/lib/list_debug.c
+++ b/lib/list_debug.c
@@ -59,14 +59,17 @@
*/
void list_del(struct list_head *entry)
{
+ BUG_ON(entry->prev->next != entry);
+ BUG_ON(entry->next->prev != entry);
+
if (unlikely(entry->prev->next != entry)) {
- printk(KERN_ERR "list_del corruption. prev->next should be %p, but was %p\n",
- entry, entry->prev->next);
+ printk(KERN_ERR "list_del corruption. prev->next should be %p, "
+ "but was %p\n", entry, entry->prev->next);
BUG();
}
if (unlikely(entry->next->prev != entry)) {
- printk(KERN_ERR "list_del corruption. next->prev should be %p, but was %p\n",
- entry, entry->next->prev);
+ printk(KERN_ERR "list_del corruption. next->prev should be %p, "
+ "but was %p\n", entry, entry->next->prev);
BUG();
}
__list_del(entry->prev, entry->next);
@@ -74,4 +77,3 @@
entry->prev = LIST_POISON2;
}
EXPORT_SYMBOL(list_del);
-