linux-kernel - Re: [patch v2 21/38] x86/cpu: Provide cpu_init/parse

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Message-ID: <fb5cb37f-550e-1627-ff5e-bfd2e5696a26@citrix.com>
Date:   Tue, 1 Aug 2023 23:35:00 +0100
From:   Andrew Cooper <andrew.cooper3@...rix.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        "Michael Kelley (LINUX)" <mikelley@...rosoft.com>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        Tom Lendacky <thomas.lendacky@....com>,
        Arjan van de Ven <arjan@...ux.intel.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        Dick Kennedy <dick.kennedy@...adcom.com>,
        James Smart <james.smart@...adcom.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        Guenter Roeck <linux@...ck-us.net>,
        "linux-hwmon@...r.kernel.org" <linux-hwmon@...r.kernel.org>,
        Jean Delvare <jdelvare@...e.com>,
        Huang Rui <ray.huang@....com>, Juergen Gross <jgross@...e.com>,
        Steve Wahl <steve.wahl@....com>,
        Mike Travis <mike.travis@....com>,
        Dimitri Sivanich <dimitri.sivanich@....com>,
        Russ Anderson <russ.anderson@....com>,
        linux-hyperv@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [patch v2 21/38] x86/cpu: Provide cpu_init/parse_topology()

On 01/08/2023 11:25 pm, Thomas Gleixner wrote:
> --- a/arch/x86/kernel/cpu/common.c
> +++ b/arch/x86/kernel/cpu/common.c
> @@ -1688,7 +1688,7 @@ static void validate_apic_and_package_id
>  
>  	apicid = apic->cpu_present_to_apicid(cpu);
>  
> -	if (apicid != c->topo.apicid) {
> +	if (WARN_ON_ONCE(apicid != c->topo.apicid)) {
>  		pr_err(FW_BUG "CPU%u: APIC id mismatch. Firmware: %x APIC: %x\n",

While you're fixing this, care to remove the chaotic-evil path of mixing
%u and %x with no 0x prefix?

~Andrew