linux-kernel - Re: [PATCH v4 29/34] x86/amd_nb: Trickle down 'struct cpuinfo

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Message-ID: <202508180405.3e28d0dd-lkp@intel.com>
Date: Mon, 18 Aug 2025 10:54:20 +0800
From: kernel test robot <oliver.sang@...el.com>
To: "Ahmed S. Darwish" <darwi@...utronix.de>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
	Borislav Petkov <bp@...en8.de>, Ingo Molnar <mingo@...hat.com>, Dave Hansen
	<dave.hansen@...ux.intel.com>, Thomas Gleixner <tglx@...utronix.de>, "Andrew
 Cooper" <andrew.cooper3@...rix.com>, "H. Peter Anvin" <hpa@...or.com>, "David
 Woodhouse" <dwmw2@...radead.org>, Sean Christopherson <seanjc@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>, Sohil Mehta <sohil.mehta@...el.com>,
	John Ogness <john.ogness@...utronix.de>, <x86@...nel.org>,
	<x86-cpuid@...ts.linux.dev>, "Ahmed S. Darwish" <darwi@...utronix.de>,
	<oliver.sang@...el.com>
Subject: Re: [PATCH v4 29/34] x86/amd_nb: Trickle down 'struct cpuinfo_x86'
 reference



Hello,

kernel test robot noticed "BUG:using_smp_processor_id()in_preemptible" on:

commit: 038e81b1617c57babe0381d3660234db5e84fb93 ("[PATCH v4 29/34] x86/amd_nb: Trickle down 'struct cpuinfo_x86' reference")
url: https://github.com/intel-lab-lkp/linux/commits/Ahmed-S-Darwish/x86-cpuid-Remove-transitional-asm-cpuid-h-header/20250815-152019
patch link: https://lore.kernel.org/all/20250815070227.19981-30-darwi@linutronix.de/
patch subject: [PATCH v4 29/34] x86/amd_nb: Trickle down 'struct cpuinfo_x86' reference

in testcase: boot

config: x86_64-randconfig-078-20250816
compiler: gcc-11
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

(please refer to attached dmesg/kmsg for entire log/backtrace)


+--------------------------------------------+------------+------------+
|                                            | 2b4adf7848 | 038e81b161 |
+--------------------------------------------+------------+------------+
| BUG:using_smp_processor_id()in_preemptible | 0          | 12         |
+--------------------------------------------+------------+------------+


If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202508180405.3e28d0dd-lkp@intel.com


[    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) 
[    1.203596][    T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.17.0-rc1-00029-g038e81b1617c #1 PREEMPT(full)
[    1.203603][    T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[    1.203606][    T1] Call Trace:
[    1.203608][    T1]  <TASK>
[ 1.203612][ T1] dump_stack_lvl (lib/dump_stack.c:122 (discriminator 4)) 
[ 1.203619][ T1] check_preemption_disabled (lib/smp_processor_id.c:51) 
[ 1.203627][ T1] ? hpet_late_init (arch/x86/kernel/amd_nb.c:318) 
[ 1.203633][ T1] init_amd_nbs (arch/x86/kernel/amd_nb.c:319) 
[ 1.203638][ T1] ? hpet_late_init (arch/x86/kernel/amd_nb.c:318) 
[ 1.203644][ T1] ? hpet_late_init (arch/x86/kernel/amd_nb.c:318) 
[ 1.203648][ T1] do_one_initcall (init/main.c:1269) 
[ 1.203655][ T1] ? rdinit_setup (init/main.c:1315) 
[ 1.203661][ T1] ? rcu_is_watching (include/linux/context_tracking.h:128 kernel/rcu/tree.c:751) 
[ 1.203670][ T1] do_initcalls (init/main.c:1330 init/main.c:1347) 
[ 1.203677][ T1] kernel_init_freeable (init/main.c:1583) 
[ 1.203682][ T1] ? rest_init (init/main.c:1461) 
[ 1.203689][ T1] kernel_init (init/main.c:1471) 
[ 1.203696][ T1] ret_from_fork (arch/x86/kernel/process.c:154) 
[ 1.203704][ T1] ? rest_init (init/main.c:1461) 
[ 1.203712][ T1] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[    1.203725][    T1]  </TASK>


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20250818/202508180405.3e28d0dd-lkp@intel.com



-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki