Re: [PATCH v3 3/3] sched, x86: Check that we're on the right stack in schedule and __might_sleep

From: Linus Torvalds
Date: Wed Nov 19 2014 - 18:42:34 EST

On Wed, Nov 19, 2014 at 3:32 PM, Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
> preempt_count is a per cpu variable at least on x86 since:

Oh, goodie. I hadn't tracked that it went in, I just remembered the
discussion. I should have looked.

And apparently we do it in nmi_enter too, so NMI is already ok. Don't
know about the others.

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