[PATCH] add BUG_ON to 2.4 #2

From: David Garfield (garfield@irving.iisd.sra.com)
Date: Fri Jan 25 2002 - 18:25:07 EST


Robert Love writes:
...
> diff -urN linux-2.4.18-pre7/mm/vmscan.c linux/mm/vmscan.c
> --- linux-2.4.18-pre7/mm/vmscan.c Thu Jan 24 13:48:18 2002
> +++ linux/mm/vmscan.c Fri Jan 25 18:05:14 2002
...
> @@ -354,10 +354,8 @@
>
> page = list_entry(entry, struct page, lru);
>
> - if (unlikely(!PageLRU(page)))
> - BUG();
> - if (unlikely(PageActive(page)))
> - BUG();
> + BUG_ON(unlikely(!PageLRU(page)));
> + BUG_ON(unlikely(PageActive(page)))
>
> list_del(entry);
> list_add(entry, &inactive_list);
>

While I don't know the exact definitions, this works out to:

        if (unlikely(unlikely(!PageLRU(page)))) BUG();

which I doubt is a good idea.

--David Garfield
-
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