From: Andi Kleen <ak@muc.de>
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.
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