linux-kernel - Re: [PATCH v2] RISC-V: KVM: flush VS-stage TLB after VCPU migration to prevent stale entries

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Message-ID: <202510230552.uCekjUFE-lkp@intel.com>
Date: Thu, 23 Oct 2025 05:27:01 +0800
From: kernel test robot <lkp@...el.com>
To: Hui Min Mina Chou <minachou@...estech.com>, anup@...infault.org,
	atish.patra@...ux.dev, pjw@...nel.org, palmer@...belt.com,
	aou@...s.berkeley.edu, alex@...ti.fr
Cc: oe-kbuild-all@...ts.linux.dev, kvm@...r.kernel.org,
	kvm-riscv@...ts.infradead.org, linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org, tim609@...estech.com,
	minachou@...estech.com, ben717@...estech.com, az70021@...il.com
Subject: Re: [PATCH v2] RISC-V: KVM: flush VS-stage TLB after VCPU migration
 to prevent stale entries

Hi Hui,

kernel test robot noticed the following build warnings:

[auto build test WARNING on kvm/queue]
[also build test WARNING on kvm/next mst-vhost/linux-next linus/master v6.18-rc2 next-20251022]
[cannot apply to kvm/linux-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Hui-Min-Mina-Chou/RISC-V-KVM-flush-VS-stage-TLB-after-VCPU-migration-to-prevent-stale-entries/20251021-163357
base:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue
patch link:    https://lore.kernel.org/r/20251021083105.4029305-1-minachou%40andestech.com
patch subject: [PATCH v2] RISC-V: KVM: flush VS-stage TLB after VCPU migration to prevent stale entries
config: riscv-allmodconfig (https://download.01.org/0day-ci/archive/20251023/202510230552.uCekjUFE-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 754ebc6ebb9fb9fbee7aef33478c74ea74949853)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251023/202510230552.uCekjUFE-lkp@intel.com/reproduce)

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 <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510230552.uCekjUFE-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/riscv/kvm/vmid.c:126:6: warning: no previous prototype for function 'kvm_riscv_local_tlb_sanitize' [-Wmissing-prototypes]
     126 | void kvm_riscv_local_tlb_sanitize(struct kvm_vcpu *vcpu)
         |      ^
   arch/riscv/kvm/vmid.c:126:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     126 | void kvm_riscv_local_tlb_sanitize(struct kvm_vcpu *vcpu)
         | ^
         | static 
   1 warning generated.


vim +/kvm_riscv_local_tlb_sanitize +126 arch/riscv/kvm/vmid.c

   125	
 > 126	void kvm_riscv_local_tlb_sanitize(struct kvm_vcpu *vcpu)

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