[PATCH] fix pf request handling

Here's the patch from

http://bugzilla.kernel.org/show_bug.cgi?id=4853



It is a feeble attempt at fixing the request handling in pf, it is totally
foobar right now.

Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>