Re: remove mixture of non-atomic operations with page->flags which

[David S. Miller]

   From: William Lee Irwin III <[e-mail]>
   Date: Mon, 3 Jun 2002 04:00:55 -0700

    	if (PageWriteback(page))
    		BUG();
   -	ClearPageDirty(page);
   -	page->flags &= ~(1<<PG_referenced);
   +
   +	page->flags &= ~((1UL << PG_referenced) | (1UL << PG_dirty));

Umm, nevermind.  Look at ClearPageDirty, it does
"other stuff" so you can't remove it wholesale.

In the end, the code is as it should be right now.