Messages in this thread | | | Date | Sun, 19 Jan 2014 23:45:43 -0500 | Subject | Re: linux-next: build failure after merge of the tip tree | From | Len Brown <> |
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+static void mwait_idle(void) +{ + mwait_idle_with_hints(0, 0); +} +
The reason the patch above will crash Core2 machines is because core2 machines don't support mwait_idle_with_hints().
The calling sequence for old and new MWAIT instructions is different. The former must be invoked with interrupts enabled, and the later can be invoked with interrupts disabled, which is a feature that Linux takes advantage of.
thanks, -Len
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