| Date | Mon, 19 Sep 2011 16:51:10 -0500 (CDT) | From | Christoph Lameter <> | Subject | Re: [RFC][PATCH 1/5] x86: Remove const_udelay() caring about which cpu var it uses |
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On Mon, 19 Sep 2011, Steven Rostedt wrote:
> The __const_udelay() code originally used raw_smp_processor_id() > in its calculations for a delaying. Probably because if it were > to migrate, it would take much longer to do so than the requested > delay. > > Switch from this_cpu_read() to __this_cpu_read() to document that > the read is racy and we do not care.
Is preemption disabled by all callers to __const_udelay?
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