Re: [PATCH] RT: Checks for cmpxchg in get_task_struct_rcu()

[Nick Piggin]

Daniel Walker wrote:
> On Thu, 2005-09-22 at 10:59 +1000, Nick Piggin wrote:
>
>
> > You need my atomic_cmpxchg patches that provide an atomic_cmpxchg
> > (and atomic_inc_not_zero) for all architectures.
>
>
> It is racy, but why not just disable preemption ..

Well you haven't, that's the point. You *introduce* racy operation.

Anyway, no matter, atomic_cmpxchg will take care of this nicely.

--
SUSE Labs, Novell Inc.

Send instant messages to your online friends http://au.messenger.yahoo.com 
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/