Re: [tip:perf/core] jump label: x86 support

Peter Zijlstra
2010-10-18T11:18:19Z

On Fri, 2010-09-24 at 09:01 +0000, tip-bot for Jason Baron wrote:
> +void arch_jump_label_transform(struct jump_entry *entry,
> + enum jump_label_type type)
> +{
> + union jump_code_union code;
> +
> + if (type == JUMP_LABEL_ENABLE) {
> + code.jump = 0xe9;
> + code.offset = entry->target -
> + (entry->code + JUMP_LABEL_NOP_SIZE);
> + } else
> + memcpy(&code, ideal_nop5, JUMP_LABEL_NOP_SIZE);
> + get_online_cpus();
> + mutex_lock(&text_mutex);
> + text_poke_smp((void *)entry->code, &code, JUMP_LABEL_NOP_SIZE);
> + mutex_unlock(&text_mutex);
> + put_online_cpus();
> +}

hpa, mathieu, what's the status of stop_machine less text poking?
Because the above basically means we have to disable architecture
jump_label support for -rt.