From: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Gene is hitting this mapping->private_list corruption, with the BUG_ON's it
will be clearer what is happening in case others hit the same bug.
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
25-akpm/fs/buffer.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletion(-)
diff -puN fs/buffer.c~possible-dcache-bug-debugging-patch fs/buffer.c
--- 25/fs/buffer.c~possible-dcache-bug-debugging-patch 2005-02-22 18:19:05.000000000 -0800
+++ 25-akpm/fs/buffer.c 2005-02-22 18:19:05.000000000 -0800
@@ -728,6 +728,8 @@ EXPORT_SYMBOL(mark_buffer_async_write);
*/
static inline void __remove_assoc_queue(struct buffer_head *bh)
{
+ BUG_ON(bh->b_assoc_buffers.next == NULL);
+ BUG_ON(bh->b_assoc_buffers.prev == NULL);
list_del_init(&bh->b_assoc_buffers);
}
@@ -1002,7 +1004,10 @@ int remove_inode_buffers(struct inode *i
spin_lock(&buffer_mapping->private_lock);
while (!list_empty(list)) {
- struct buffer_head *bh = BH_ENTRY(list->next);
+ struct buffer_head *bh;
+
+ BUG_ON(list->next == NULL);
+ bh = BH_ENTRY(list->next);
if (buffer_dirty(bh)) {
ret = 0;
break;
_