Re: Reduce struct page by 8 bytes on 64bit

[David S. Miller]

   From: Andi Kleen <[e-mail]>
   Date: Wed, 16 Apr 2003 16:58:53 +0200
   
   In this case part of the unsigned long could be accessed directly 
   using the aliasing.

They use the same ATOMIC_HASH() for both atomic_t's and bitops.
I don't see how an alias can be generated.  This thing must
work for any ordering of unsigned long *'s and atomic_t's.