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X-CSE-ConnectionGUID: 32x2mn61TAGmL9ePD1YxYw== X-CSE-MsgGUID: KSbIlU5ERMG0WKeP0hjA/Q== X-IronPort-AV: E=McAfee;i="6800,10657,11904"; a="93571322" X-IronPort-AV: E=Sophos;i="6.27,103,1787036400"; d="scan'208";a="93571322" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Sep 2026 07:13:09 -0700 X-CSE-ConnectionGUID: ozPZhHviSoupPoiB9paZ/A== X-CSE-MsgGUID: x7AuoYUGT8uQU071K3+9OA== X-ExtLoop1: 1 Received: from igk-lkp-server01.igk.intel.com (HELO 71151d66d536) ([10.211.93.152]) by fmviesa003.fm.intel.com with ESMTP; 14 Sep 2026 07:13:07 -0700 Received: from kbuild by 71151d66d536 with local (Exim 4.98.2) (envelope-from ) id 1x67Qe-000000000Br-0mjZ; Mon, 14 Sep 2026 14:13:04 +0000 Date: Mon, 14 Sep 2026 16:12:45 +0200 From: kernel test robot To: Timur Tabi Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Lyude Paul Subject: drivers/gpu/drm/nouveau/nvkm/subdev/fb/gb202.c:17:37: warning: result of comparison of constant 4503599627370495 with expression of type 'dma_addr_t' (aka 'unsigned int') is always false Message-ID: <202609141504.5flfpx8O-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 704340f1cd0dcef829eb62f5b48ae95a2ce17bdf commit: 31d3354f42c0da34415164a1f621a195caa1f1bc drm/nouveau: verify that hardware supports the flush page address date: 10 months ago config: i386-randconfig-r062-20260914 (https://download.01.org/0day-ci/archive/20260914/202609141504.5flfpx8O-lkp@intel.com/config) compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260914/202609141504.5flfpx8O-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 | Fixes: 31d3354f42c0 ("drm/nouveau: verify that hardware supports the flush page address") | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202609141504.5flfpx8O-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/gpu/drm/nouveau/nvkm/subdev/fb/gb202.c:17:37: warning: result of comparison of constant 4503599627370495 with expression of type 'dma_addr_t' (aka 'unsigned int') is always false [-Wtautological-constant-out-of-range-compare] 17 | WARN_ON(fb->sysmem.flush_page_addr > DMA_BIT_MASK(52)); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~ include/asm-generic/bug.h:123:25: note: expanded from macro 'WARN_ON' 123 | int __ret_warn_on = !!(condition); \ | ^~~~~~~~~ 1 warning generated. vim +17 drivers/gpu/drm/nouveau/nvkm/subdev/fb/gb202.c 9 10 static void 11 gb202_fb_sysmem_flush_page_init(struct nvkm_fb *fb) 12 { 13 struct nvkm_device *device = fb->subdev.device; 14 const u64 addr = fb->sysmem.flush_page_addr; 15 16 // Ensure that the address is within hardware limits > 17 WARN_ON(fb->sysmem.flush_page_addr > DMA_BIT_MASK(52)); 18 19 nvkm_wr32(device, NV_PFB_FBHUB0_PCIE_FLUSH_SYSMEM_ADDR_HI, upper_32_bits(addr)); 20 nvkm_wr32(device, NV_PFB_FBHUB0_PCIE_FLUSH_SYSMEM_ADDR_LO, lower_32_bits(addr)); 21 } 22 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki