[patch V2 07/15] powerpc/ps3: Convert half completion to rcuwait

[Christoph Hellwig]

On Wed, Mar 18, 2020 at 09:43:09PM +0100, Thomas Gleixner wrote:
> The PS3 notification interrupt and kthread use a hacked up completion to
> communicate. Since we're wanting to change the completion implementation and
> this is abuse anyway, replace it with a simple rcuwait since there is only ever
> the one waiter.
> 
> AFAICT the kthread uses TASK_INTERRUPTIBLE to not increase loadavg, kthreads
> cannot receive signals by default and this one doesn't look different. Use
> TASK_IDLE instead.

I think the right fix here is to jut convert the thing to a threaded
interrupt handler and kill off the stupid kthread.

But I wonder how alive the whole PS3 support is to start with..