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X-CSE-ConnectionGUID: D5PHm02xS1mZokMn5EsfWQ== X-CSE-MsgGUID: ikMLpPWITty3eVMKUaSnLA== X-IronPort-AV: E=McAfee;i="6800,10657,11699"; a="72193914" X-IronPort-AV: E=Sophos;i="6.21,287,1763452800"; d="scan'208";a="72193914" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by fmvoesa108.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Feb 2026 14:47:31 -0800 X-CSE-ConnectionGUID: PwkwoEJQT22h09w+CL+wZw== X-CSE-MsgGUID: LdK8fGYwRmGYFAo8AoWvDg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,287,1763452800"; d="scan'208";a="211954712" Received: from lkp-server01.sh.intel.com (HELO 765f4a05e27f) ([10.239.97.150]) by fmviesa010.fm.intel.com with ESMTP; 12 Feb 2026 14:47:26 -0800 Received: from kbuild by 765f4a05e27f with local (Exim 4.98.2) (envelope-from ) id 1vqfT2-00000000tvY-2HJ9; Thu, 12 Feb 2026 22:47:24 +0000 Date: Fri, 13 Feb 2026 06:46:57 +0800 From: kernel test robot To: Julian Ruess , schnelle@linux.ibm.com, wintera@linux.ibm.com, ts@linux.ibm.com, oberpar@linux.ibm.com, gbayer@linux.ibm.com, Alex Williamson , Jason Gunthorpe , Yishai Hadas , Shameer Kolothum , Kevin Tian Cc: oe-kbuild-all@lists.linux.dev, mjrosato@linux.ibm.com, alifm@linux.ibm.com, raspl@linux.ibm.com, hca@linux.ibm.com, agordeev@linux.ibm.com, gor@linux.ibm.com, julianr@linux.ibm.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, linux-pci@vger.kernel.org Subject: Re: [PATCH 1/3] vfio/pci: Set VFIO_PCI_OFFSET_SHIFT to 48 Message-ID: <202602130659.urh1Dx2i-lkp@intel.com> References: <20260212-vfio_pci_ism-v1-1-333262ade074@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260212-vfio_pci_ism-v1-1-333262ade074@linux.ibm.com> Hi Julian, kernel test robot noticed the following build warnings: [auto build test WARNING on 05f7e89ab9731565d8a62e3b5d1ec206485eeb0b] url: https://github.com/intel-lab-lkp/linux/commits/Julian-Ruess/vfio-pci-Set-VFIO_PCI_OFFSET_SHIFT-to-48/20260212-220938 base: 05f7e89ab9731565d8a62e3b5d1ec206485eeb0b patch link: https://lore.kernel.org/r/20260212-vfio_pci_ism-v1-1-333262ade074%40linux.ibm.com patch subject: [PATCH 1/3] vfio/pci: Set VFIO_PCI_OFFSET_SHIFT to 48 config: riscv-randconfig-001-20260213 (https://download.01.org/0day-ci/archive/20260213/202602130659.urh1Dx2i-lkp@intel.com/config) compiler: riscv64-linux-gcc (GCC) 11.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260213/202602130659.urh1Dx2i-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202602130659.urh1Dx2i-lkp@intel.com/ All warnings (new ones prefixed by >>): drivers/vfio/pci/nvgrace-gpu/main.c: In function 'addr_to_pgoff': >> drivers/vfio/pci/nvgrace-gpu/main.c:196:22: warning: left shift count >= width of type [-Wshift-count-overflow] 196 | ((1U << (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT)) - 1); | ^~ drivers/vfio/pci/nvgrace-gpu/main.c: In function 'nvgrace_gpu_mmap': drivers/vfio/pci/nvgrace-gpu/main.c:272:22: warning: left shift count >= width of type [-Wshift-count-overflow] 272 | ((1U << (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT)) - 1); | ^~ vim +196 drivers/vfio/pci/nvgrace-gpu/main.c a23b10608d4203 Ankit Agrawal 2025-11-27 191 9db65489b87298 Ankit Agrawal 2025-11-27 192 static unsigned long addr_to_pgoff(struct vm_area_struct *vma, 9db65489b87298 Ankit Agrawal 2025-11-27 193 unsigned long addr) 9db65489b87298 Ankit Agrawal 2025-11-27 194 { 9db65489b87298 Ankit Agrawal 2025-11-27 195 u64 pgoff = vma->vm_pgoff & 9db65489b87298 Ankit Agrawal 2025-11-27 @196 ((1U << (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT)) - 1); 9db65489b87298 Ankit Agrawal 2025-11-27 197 9db65489b87298 Ankit Agrawal 2025-11-27 198 return ((addr - vma->vm_start) >> PAGE_SHIFT) + pgoff; 9db65489b87298 Ankit Agrawal 2025-11-27 199 } 9db65489b87298 Ankit Agrawal 2025-11-27 200 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki