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Message-ID: <1297250364.13327.160.camel@laptop> Date: Wed, 09 Feb 2011 12:19:24 +0100 From: Peter Zijlstra <peterz@...radead.org> To: Trinabh Gupta <trinabh@...ux.vnet.ibm.com> Cc: arjan@...ux.intel.com, lenb@...nel.org, suresh.b.siddha@...el.com, benh@...nel.crashing.org, venki@...gle.com, ak@...ux.intel.com, linux-kernel@...r.kernel.org Subject: Re: [RFC PATCH V3 3/3] cpuidle: default idle driver for x86 On Tue, 2011-02-08 at 16:22 +0530, Trinabh Gupta wrote: > +/* > + * cpu_idle_wait - Used to ensure that all the CPUs discard old value of > + * pm_idle and update to new pm_idle value. Required while changing pm_idle > + * handler on SMP systems. > + * > + * Caller must have changed pm_idle to the new value before the call. Old > + * pm_idle value will not be used by any CPU after the return of this function. > + */ > +void cpu_idle_wait(void) > +{ > + smp_mb(); > + /* kick all the CPUs so that they exit out of pm_idle */ > + smp_call_function(do_nothing, NULL, 1); > +} pm_idle exists no longer... -- 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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