On 2024/7/31 16:24, Russell King (Oracle) wrote: > 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. You're right, it's more elegant to use dynamic keys in assembly, let me think about how to do it. >
