linux-kernel - Re: [PATCH v5 05/12] x86/apic: Unify interrupt mode setup for SMP-capable system

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Date:   Sun, 2 Jul 2017 20:07:23 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Dou Liyang <douly.fnst@...fujitsu.com>
cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        xen-devel@...ts.xenproject.org, mingo@...nel.org, hpa@...or.com,
        ebiederm@...ssion.com, bhe@...hat.com, boris.ostrovsky@...cle.com,
        peterz@...radead.org, izumi.taku@...fujitsu.com
Subject: Re: [PATCH v5 05/12] x86/apic: Unify interrupt mode setup for
 SMP-capable system

On Fri, 30 Jun 2017, Dou Liyang wrote:
> -static int __init apic_intr_mode_select(void)
> +static int __init apic_intr_mode_select(int *upmode)
>  {
>  	/* Check kernel option */
>  	if (disable_apic) {
> @@ -1206,12 +1208,30 @@ static int __init apic_intr_mode_select(void)
>  	if (!smp_found_config) {
>  		disable_ioapic_support();
>  
> -		if (!acpi_lapic)
> +		if (!acpi_lapic) {
>  			pr_info("APIC: ACPI MADT or MP tables are not detected\n");
> +			*upmode = true;

That store and extra argument is pointless. 

> +
> +			return APIC_VIRTUAL_WIRE_NO_CONFIG;

You added an extra return code, which you can use exactly for that purpose
at the callsite.


Aside of that, if you use int * then use numbers, if you use bool then use
true/false. But mixing that is horrible.

> +		}

Thanks,

	tglx