From: liuxiang
Date: Wed, 18 Apr 2018 21:48:22 +0800 (CST)
> Because the timeout task gets the main spinlock and disable the
> current cpu's irq, there is no other task on the same cpu can run,
> and tasks on the other cpus can not enter the dm9000_timeout()
> again. So in the whole dm9000_timeo
From: Liu Xiang
Date: Sat, 14 Apr 2018 16:50:34 +0800
> +static bool dm9000_current_in_timeout(struct board_info *db)
> +{
> + bool ret = false;
> +
> + preempt_disable();
> + ret = (db->timeout_cpu == smp_processor_id());
> + preempt_enable();
This doesn't work.
As soon as you
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