Re: [RFC][PATCH v2 08/10] smp,irq_work: Use the new irq_work API

[Christoph Hellwig]

On Tue, Aug 18, 2020 at 12:51:10PM +0200, Peter Zijlstra wrote:
> Convert the performance sensitive users of
> smp_call_single_function_async() over to the new
> irq_work_queue_remote_static().
> 
> The new API is marginally less crap but taking these users away allows
> fixing up smp_call_single_function_async() without risk of performance
> regressions.

You probably want a conversion patch per subsystem so that it sticks
out.  What is so crap about this API?  How could we as subsystem
maintainers help to make it less crappy?