Re: [PATCH] updated low-latency zap_page_range

Linus Torvalds (torvalds@transmeta.com)
Wed, 24 Jul 2002 18:21:07 -0700 (PDT)

On 24 Jul 2002, Robert Love wrote:
>
> if (preempt_count() == 1 && need_resched())
>
> Then we get "if (0 && ..)" which should hopefully be evaluated away.

I think preempt_count() is not unconditionally 0 for non-preemptible
kernels, so I don't think this is a compile-time constant.

That may be a bug in preempt_count(), of course.

Linus

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/