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

From: kernel test robot <lkp@intel.com>
To: Hui Min Mina Chou <minachou@andestech.com>,
	anup@brainfault.org, atish.patra@linux.dev, pjw@kernel.org,
	palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr
Cc: oe-kbuild-all@lists.linux.dev, kvm@vger.kernel.org,
	kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org,
	linux-kernel@vger.kernel.org, tim609@andestech.com,
	minachou@andestech.com, ben717@andestech.com, az70021@gmail.com
Subject: Re: [PATCH v2] RISC-V: KVM: flush VS-stage TLB after VCPU migration to prevent stale entries
Date: Thu, 23 Oct 2025 04:34:39 +0800	[thread overview]
Message-ID: <202510230412.vKIvCmwU-lkp@intel.com> (raw)
In-Reply-To: <20251021083105.4029305-1-minachou@andestech.com>

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-randconfig-r072-20251023 (https://download.01.org/0day-ci/archive/20251023/202510230412.vKIvCmwU-lkp@intel.com/config)
compiler: riscv64-linux-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251023/202510230412.vKIvCmwU-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510230412.vKIvCmwU-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/riscv/kvm/vmid.c:126:6: warning: no previous prototype for 'kvm_riscv_local_tlb_sanitize' [-Wmissing-prototypes]
     126 | void kvm_riscv_local_tlb_sanitize(struct kvm_vcpu *vcpu)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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

   125	
 > 126	void kvm_riscv_local_tlb_sanitize(struct kvm_vcpu *vcpu)

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