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From: "Ahmed S. Darwish" <darwi@linutronix.de>
To: kernel test robot <oliver.sang@intel.com>
Cc: oe-lkp@lists.linux.dev, lkp@intel.com, linux-kernel@vger.kernel.org,
	Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@redhat.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	"H. Peter Anvin" <hpa@zytor.com>,
	David Woodhouse <dwmw2@infradead.org>,
	Sean Christopherson <seanjc@google.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Sohil Mehta <sohil.mehta@intel.com>,
	John Ogness <john.ogness@linutronix.de>, x86@kernel.org,
	x86-cpuid@lists.linux.dev
Subject: Re: [PATCH v4 29/34] x86/amd_nb: Trickle down 'struct cpuinfo_x86'
 reference
Message-ID: <aKM9BH0q630ClMth@lx-t490>
References: <20250815070227.19981-30-darwi@linutronix.de>
 <202508180405.3e28d0dd-lkp@intel.com>
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In-Reply-To: <202508180405.3e28d0dd-lkp@intel.com>

On Mon, 18 Aug 2025, kernel test robot wrote:
>
> [    1.202568][    T1] BUG: using smp_processor_id() in preemptible [00000000] code: swapper/0/1
> [ 1.202670][ T1] caller is init_amd_nbs (arch/x86/kernel/amd_nb.c:319)
>

Hmm... This is triggered by:

    static __init int init_amd_nbs(void)
    {
	struct cpuinfo_x86 *c = this_cpu_ptr(&cpu_info);
	...
    }

Since this is all __init code anyway, for the next iteration I'll use
'boot_cpu_data' instead of per-CPU cpu_info access.

Thanks!

--
Ahmed S. Darwish
Linutronix GmbH