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Date: Fri, 5 Jun 2009 12:34:37 -0700 From: Dan Williams <dan.j.williams@...el.com> To: cl@...ux-foundation.org Cc: linux-kernel@...r.kernel.org, Tejun Heo <tj@...nel.org>, Eric Biederman <ebiederm@...stanetworks.com>, Stephen Hemminger <shemminger@...tta.com>, Trond Myklebust <Trond.Myklebust@...app.com>, Herbert Xu <herbert@...dor.apana.org.au>, David L Stevens <dlstevens@...ibm.com>, mingo@...e.hu, rusty@...tcorp.com.au, davem@...emloft.net, "Sosnowski, Maciej" <maciej.sosnowski@...el.com> Subject: Re: [this_cpu_xx 06/11] Eliminate get/put_cpu [ added Maciej to the cc ] On Fri, Jun 5, 2009 at 12:18 PM, <cl@...ux-foundation.org> wrote: > There are cases where we can use this_cpu_ptr and as the result > of using this_cpu_ptr() we no longer need to determine the > current executing cpu. > > In those places no get/put_cpu combination is needed anymore. > The local cpu variable can be eliminated. > > Preemption still needs to be disabled and enabled since the > modifications of the per cpu variables is not atomic. There may > be multiple per cpu variables modified and those must all > be from the same processor. > > cc: Dan Williams <dan.j.williams@...el.com> Acked-by: Dan Williams <dan.j.williams@...el.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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