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Message-ID: <4c6cda5e-4cdc-6c4a-891e-162ec3ba0210@oracle.com>
Date:   Sat, 19 Aug 2023 08:03:27 -0500
From:   Eric DeVolder <eric.devolder@...cle.com>
To:     paulmck@...nel.org, linux-kernel@...r.kernel.org,
        linux-next@...r.kernel.org
Cc:     sfr@...b.auug.org.au, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, dave.hansen@...ux.intel.com, x86@...nel.org,
        hpa@...or.com, sourabhjain@...ux.ibm.com, hbathini@...ux.ibm.com,
        bhe@...hat.com
Subject: Re: [BUG resend next-20230818] error: 'prepare_elf_headers' defined
 but not used



On 8/18/23 21:28, Paul E. McKenney wrote:
> Hello!
> 
> This morning's rcutorture testing on next-20230818 complained about
> prepare_elf_headers() being defined but unused on several rcutorture
> scenarios.  The patch below makes rcutorture happy, but might or might
> not be a proper fix.
> 
> This is a resend adding a few more people on CC, given a possible
> relationship to 9f1f399ca999 ("x86/crash: add x86 crash hotplug support").
> 
> Thoughts?
> 
> 							Thanx, Paul
> 
Paul,
Any chance I could get a pointer to one of the failing
kernel .config files for the rcutorture case?
Thanks!
eric

> ------------------------------------------------------------------------
> 
> diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c
> index 1d0f824559fce..926c39e22387b 100644
> --- a/arch/x86/kernel/crash.c
> +++ b/arch/x86/kernel/crash.c
> @@ -127,7 +127,8 @@ void native_machine_crash_shutdown(struct pt_regs *regs)
>   	crash_save_cpu(regs, safe_smp_processor_id());
>   }
>   
> -#if defined(CONFIG_KEXEC_FILE) || defined(CONFIG_CRASH_DUMP)
> +#if (defined(CONFIG_KEXEC_FILE) || defined(CONFIG_CRASH_DUMP)) && defined(CONFIG_SMP) && defined(CONFIG_X86_LOCAL_APIC)
> +
>   static int get_nr_ram_ranges_callback(struct resource *res, void *arg)
>   {
>   	unsigned int *nr_ranges = arg;

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