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authorManfred Spraul <manfred@colorfullife.com>2006-09-29 01:59:01 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-29 09:18:05 -0700
commitdf89a864631f5d840f4873c4c03733b4206e78ea (patch)
treeea72861bb3348ff740f0ff1e89260eb451666a5b /lib/list_debug.c
parent199a9afc3dbe98c35326f1d3907ab94dae953a6e (diff)
downloadlinux-df89a864631f5d840f4873c4c03733b4206e78ea.tar.gz
[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>
Diffstat (limited to 'lib/list_debug.c')
-rw-r--r--lib/list_debug.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/lib/list_debug.c b/lib/list_debug.c
index 1aae85cef92..e80d27c9789 100644
--- a/lib/list_debug.c
+++ b/lib/list_debug.c
@@ -59,14 +59,17 @@ EXPORT_SYMBOL(list_add);
*/
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 @@ void list_del(struct list_head *entry)
entry->prev = LIST_POISON2;
}
EXPORT_SYMBOL(list_del);
-