Andrew Morton wrote:
> Jeff Garzik <jgarzik@pobox.com> wrote:
> 
>>I would rather not kill the code in submit_bh() outright, just disable 
>> it for non-filesystem developers.
> 
> 
> submit_bh() is a slowpath ;) The one in mark_buffer_dirty() will be called
> more often, possibly others.  Kill!

Jens seems to like the debugging checks, so here's an alterna-patch.

	Jeff