From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.14]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CF76D191F98 for ; Wed, 24 Jun 2026 02:14:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.14 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782267260; cv=none; b=No7h8W0wWvxxlwDJLoteCV89wGlRjjaqvAdk4GvXCTdG5AX4ITpjV+YRsk4YUFm24xIgEz5hYDgqiIESZv0/IE3vDoTfNhGajpDlOk3mUWRgM8XRJQ4gR73Dy9BcwNrRKm91alz0woHTZszVVT8GqEZFVYghhLSQ7iVZGDBRZlo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782267260; c=relaxed/simple; bh=3txMXZZJU48gw5dsEb68GSapeIZ4cE+qVTDDPiTalBA=; h=Date:From:To:Cc:Subject:Message-ID; b=nWb18hgJrmieob8z+MRz1pyzM/bNnLlKKpvL8JEVD7LJW+DZ5TksjP3wUWcWwmzDMnO+IuDZ7j/IzERU06dj7+u7XyeFHbjWYVd2XbuN2dqZR/DZzpaJFlLtAUDnUK+HSOjbSjFVYXcYTGjZspv9kIVl12u7SlV5dx4vQf8q7v4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=OaHhwcFN; arc=none smtp.client-ip=198.175.65.14 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="OaHhwcFN" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1782267258; x=1813803258; h=date:from:to:cc:subject:message-id; bh=3txMXZZJU48gw5dsEb68GSapeIZ4cE+qVTDDPiTalBA=; b=OaHhwcFNE48y5XuChuBFg3GMChBqwY6bBrM/pcLrUQWHMFOjFtBkZHXi N2wGWOu9whGxppGfSCUv7+zcPEqkZwUFvRWah89oQk5gNEvG0JEXMM2Fl z68XNNYTUVjpYDoYcHbH0awR5Omp0LMViywhq03Hm1l/UcQvTEYKcBv2c Vc27/8slbENyhTuYMARR+MRFjWrhlovstRVs3vbZDRhuqNM6GUb30OJ9d aBuidoZCKFnD49jmhopYBA/ZRyCbIVKEPM/n7m4cu4H04C6ucXDhAWrhX UBGzSYCIMZhl+rUuhtUaa9zsJHooXTZMUTbDoQZjd3IXjh5hiEReUC8v/ g==; X-CSE-ConnectionGUID: qenw+IaJRHyCTGhEKLrg7A== X-CSE-MsgGUID: qeqsRdxpT8GUZKf86ZyNUw== X-IronPort-AV: E=McAfee;i="6800,10657,11826"; a="86923003" X-IronPort-AV: E=Sophos;i="6.24,221,1774335600"; d="scan'208";a="86923003" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by orvoesa106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Jun 2026 19:14:18 -0700 X-CSE-ConnectionGUID: Ccf4bUNOSGuBV3qIKHiWbA== X-CSE-MsgGUID: RqRXXpdZRCawnVrwbTyciQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.24,221,1774335600"; d="scan'208";a="249708802" Received: from lkp-server02.sh.intel.com (HELO ea128546eb3d) ([10.239.97.151]) by orviesa007.jf.intel.com with ESMTP; 23 Jun 2026 19:14:17 -0700 Received: from kbuild by ea128546eb3d with local (Exim 4.98.2) (envelope-from ) id 1wcD81-0000000033p-1UKC; Wed, 24 Jun 2026 02:14:13 +0000 Date: Wed, 24 Jun 2026 10:13:19 +0800 From: kernel test robot To: Jason Gunthorpe Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Joerg Roedel , Kevin Tian , Vasant Hegde Subject: include/linux/bitops.h:273:19: sparse: sparse: cast truncates bits from constant value (ffffffffff000 becomes fffff000) Message-ID: <202606241040.SJ0O1Qs9-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: bade58eb0651c84b9b2a074fe4c04f2bba6b933f commit: 879ced2bab1ba95e98fac56c9503791183bc7cbb iommupt: Add the AMD IOMMU v1 page table format date: 8 months ago config: i386-randconfig-062-20260624 (https://download.01.org/0day-ci/archive/20260624/202606241040.SJ0O1Qs9-lkp@intel.com/config) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 sparse: v0.6.5-rc1 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260624/202606241040.SJ0O1Qs9-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: 879ced2bab1b ("iommupt: Add the AMD IOMMU v1 page table format") | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202606241040.SJ0O1Qs9-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) drivers/iommu/generic_pt/fmt/iommu_amdv1.c: note: in included file (through drivers/iommu/generic_pt/fmt/../pt_log2.h, drivers/iommu/generic_pt/fmt/../pt_defs.h, drivers/iommu/generic_pt/fmt/iommu_template.h): >> include/linux/bitops.h:273:19: sparse: sparse: cast truncates bits from constant value (ffffffffff000 becomes fffff000) include/linux/bitops.h:278:16: sparse: sparse: cast truncates bits from constant value (ffffffffff000 becomes fffff000) vim +273 include/linux/bitops.h c320592f3f2a1e Wolfram Sang 2025-01-07 261 952043ac12a117 Steven Whitehouse 2009-04-23 262 /** 952043ac12a117 Steven Whitehouse 2009-04-23 263 * __ffs64 - find first set bit in a 64 bit word 952043ac12a117 Steven Whitehouse 2009-04-23 264 * @word: The 64 bit word 952043ac12a117 Steven Whitehouse 2009-04-23 265 * 4945cca232ce8b Geert Uytterhoeven 2021-02-25 266 * On 64 bit arches this is a synonym for __ffs 952043ac12a117 Steven Whitehouse 2009-04-23 267 * The result is not defined if no bits are set, so check that @word 952043ac12a117 Steven Whitehouse 2009-04-23 268 * is non-zero before calling this. 952043ac12a117 Steven Whitehouse 2009-04-23 269 */ 6606c8c7e81886 Kees Cook 2025-08-04 270 static inline __attribute_const__ unsigned int __ffs64(u64 word) 952043ac12a117 Steven Whitehouse 2009-04-23 271 { 952043ac12a117 Steven Whitehouse 2009-04-23 272 #if BITS_PER_LONG == 32 952043ac12a117 Steven Whitehouse 2009-04-23 @273 if (((u32)word) == 0UL) 952043ac12a117 Steven Whitehouse 2009-04-23 274 return __ffs((u32)(word >> 32)) + 32; 952043ac12a117 Steven Whitehouse 2009-04-23 275 #elif BITS_PER_LONG != 64 952043ac12a117 Steven Whitehouse 2009-04-23 276 #error BITS_PER_LONG not 32 or 64 952043ac12a117 Steven Whitehouse 2009-04-23 277 #endif 952043ac12a117 Steven Whitehouse 2009-04-23 278 return __ffs((unsigned long)word); 952043ac12a117 Steven Whitehouse 2009-04-23 279 } 952043ac12a117 Steven Whitehouse 2009-04-23 280 :::::: The code at line 273 was first introduced by commit :::::: 952043ac12a117d8e94bddd9088338d7ad20ca7d bitops: Add __ffs64 bitop :::::: TO: Steven Whitehouse :::::: CC: Steven Whitehouse -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki