On 2024/7/31 18:14, Russell King (Oracle) wrote: > On Wed, Jul 31, 2024 at 06:03:11PM +0800, Jinjie Ruan wrote: >> 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. >> It seems to be hard to use static keys in assembly code. >> >> By the way, currently, most architectures have simplified assembly code >> and implemented its most functions in C functions. Does arm32 have this >> plan? > > arm32 is effectively in maintenance mode; very little active development > is occuring. So, there are no plans to change the code without good > reason (as code changes without reason will needlessly affect its > stability.) Thank you for helping me with my question. >
