[patch 12/19] softirq: Add RT specific softirq accounting

[Frederic Weisbecker]

On Fri, Nov 13, 2020 at 03:02:19PM +0100, Thomas Gleixner wrote:
> RT requires the softirq to be preemptible and uses a per CPU local lock to
> protect BH disabled sections and softirq processing. Therefore RT cannot
> use the preempt counter to keep track of BH disabled/serving.
> 
> Add a RT only counter to task struct and adjust the relevant macros in
> preempt.h.

You may want to describe a bit the reason for this per task counter.
It's not intuitive at this stage.

Thanks.