Re: atomic_cmpxchg and 64-bit values

Christoph Lameter
2007-01-18T18:13:24Z

On Wed, 17 Jan 2007, Andreas Schwab wrote:

> Brent Casavant <bcasavan@sgi.com> writes:
>
> > Is there some particular reason we need the cast to int on the
> > return path for atomic_cmpxchg()? It looks to me as if this
> > macro would work equally well with an atomic_t or an atomic64_t.
>
> No, this is won't work, atomic_cmpxchg is strictly only defined for
> atomic_t. See commit 4a6dae6d382e9edf3ff440b819e554ed706359bc.

Use cmpxchg instead of atomic_cmpxchg.