[PATCH] ARM: support PREEMPT_DYNAMIC

[Russell King (Oracle)]

On Wed, Jul 31, 2024 at 10:07:53AM +0800, Jinjie Ruan wrote:
> >  #ifdef CONFIG_PREEMPTION
> > +#ifdef CONFIG_PREEMPT_DYNAMIC
> > +	bl	need_irq_preemption
> > +	cmp	r0, #0
> > +	beq	2f
> > +#endif

Depending on the interrupt rate, this can be regarded as a fast path,
it would be nice if we could find a way to use static branches in
assembly code.

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