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ESMTP; 13 Dec 2023 15:57:15 -0800 Received: from kbuild by b07ab15da5fe with local (Exim 4.96) (envelope-from ) id 1rDZ6H-000LIe-2B; Wed, 13 Dec 2023 23:57:13 +0000 Date: Thu, 14 Dec 2023 07:56:15 +0800 From: kernel test robot To: Christophe Leroy Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org Subject: arch/arc/include/asm/checksum.h:27:26: sparse: sparse: restricted __wsum degrades to integer Message-ID: <202312140758.j0bflCSo-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 5bd7ef53ffe5ca580e93e74eb8c81ed191ddc4bd commit: b38460bc463c54e0c15ff3b37e81f7e2059bb9bb kunit: Fix checksum tests on big endian CPUs date: 4 months ago config: arc-randconfig-r121-20231111 (https://download.01.org/0day-ci/archive/20231214/202312140758.j0bflCSo-lkp@intel.com/config) compiler: arceb-elf-gcc (GCC) 13.2.0 reproduce: (https://download.01.org/0day-ci/archive/20231214/202312140758.j0bflCSo-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/202312140758.j0bflCSo-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) lib/checksum_kunit.c: note: in included file: >> arch/arc/include/asm/checksum.h:27:26: sparse: sparse: restricted __wsum degrades to integer arch/arc/include/asm/checksum.h:27:36: sparse: sparse: restricted __wsum degrades to integer >> arch/arc/include/asm/checksum.h:29:11: sparse: sparse: bad assignment (-=) to restricted __wsum arch/arc/include/asm/checksum.h:30:16: sparse: sparse: restricted __wsum degrades to integer >> arch/arc/include/asm/checksum.h:30:18: sparse: sparse: incorrect type in return expression (different base types) @@ expected restricted __sum16 @@ got unsigned int @@ arch/arc/include/asm/checksum.h:30:18: sparse: expected restricted __sum16 arch/arc/include/asm/checksum.h:30:18: sparse: got unsigned int >> arch/arc/include/asm/checksum.h:27:26: sparse: sparse: restricted __wsum degrades to integer arch/arc/include/asm/checksum.h:27:36: sparse: sparse: restricted __wsum degrades to integer >> arch/arc/include/asm/checksum.h:29:11: sparse: sparse: bad assignment (-=) to restricted __wsum arch/arc/include/asm/checksum.h:30:16: sparse: sparse: restricted __wsum degrades to integer >> arch/arc/include/asm/checksum.h:30:18: sparse: sparse: incorrect type in return expression (different base types) @@ expected restricted __sum16 @@ got unsigned int @@ arch/arc/include/asm/checksum.h:30:18: sparse: expected restricted __sum16 arch/arc/include/asm/checksum.h:30:18: sparse: got unsigned int >> arch/arc/include/asm/checksum.h:27:26: sparse: sparse: restricted __wsum degrades to integer arch/arc/include/asm/checksum.h:27:36: sparse: sparse: restricted __wsum degrades to integer >> arch/arc/include/asm/checksum.h:29:11: sparse: sparse: bad assignment (-=) to restricted __wsum arch/arc/include/asm/checksum.h:30:16: sparse: sparse: restricted __wsum degrades to integer >> arch/arc/include/asm/checksum.h:30:18: sparse: sparse: incorrect type in return expression (different base types) @@ expected restricted __sum16 @@ got unsigned int @@ arch/arc/include/asm/checksum.h:30:18: sparse: expected restricted __sum16 arch/arc/include/asm/checksum.h:30:18: sparse: got unsigned int >> arch/arc/include/asm/checksum.h:27:26: sparse: sparse: restricted __wsum degrades to integer arch/arc/include/asm/checksum.h:27:36: sparse: sparse: restricted __wsum degrades to integer >> arch/arc/include/asm/checksum.h:29:11: sparse: sparse: bad assignment (-=) to restricted __wsum arch/arc/include/asm/checksum.h:30:16: sparse: sparse: restricted __wsum degrades to integer >> arch/arc/include/asm/checksum.h:30:18: sparse: sparse: incorrect type in return expression (different base types) @@ expected restricted __sum16 @@ got unsigned int @@ arch/arc/include/asm/checksum.h:30:18: sparse: expected restricted __sum16 arch/arc/include/asm/checksum.h:30:18: sparse: got unsigned int >> arch/arc/include/asm/checksum.h:27:26: sparse: sparse: restricted __wsum degrades to integer arch/arc/include/asm/checksum.h:27:36: sparse: sparse: restricted __wsum degrades to integer >> arch/arc/include/asm/checksum.h:29:11: sparse: sparse: bad assignment (-=) to restricted __wsum arch/arc/include/asm/checksum.h:30:16: sparse: sparse: restricted __wsum degrades to integer >> arch/arc/include/asm/checksum.h:30:18: sparse: sparse: incorrect type in return expression (different base types) @@ expected restricted __sum16 @@ got unsigned int @@ arch/arc/include/asm/checksum.h:30:18: sparse: expected restricted __sum16 arch/arc/include/asm/checksum.h:30:18: sparse: got unsigned int vim +27 arch/arc/include/asm/checksum.h ca15c8ecd588dd Vineet Gupta 2013-01-18 18 ca15c8ecd588dd Vineet Gupta 2013-01-18 19 /* ca15c8ecd588dd Vineet Gupta 2013-01-18 20 * Fold a partial checksum ca15c8ecd588dd Vineet Gupta 2013-01-18 21 * ca15c8ecd588dd Vineet Gupta 2013-01-18 22 * The 2 swords comprising the 32bit sum are added, any carry to 16th bit ca15c8ecd588dd Vineet Gupta 2013-01-18 23 * added back and final sword result inverted. ca15c8ecd588dd Vineet Gupta 2013-01-18 24 */ ca15c8ecd588dd Vineet Gupta 2013-01-18 25 static inline __sum16 csum_fold(__wsum s) ca15c8ecd588dd Vineet Gupta 2013-01-18 26 { d4067395519b40 Jinchao Wang 2021-06-26 @27 unsigned int r = s << 16 | s >> 16; /* ror */ ca15c8ecd588dd Vineet Gupta 2013-01-18 28 s = ~s; ca15c8ecd588dd Vineet Gupta 2013-01-18 @29 s -= r; ca15c8ecd588dd Vineet Gupta 2013-01-18 @30 return s >> 16; ca15c8ecd588dd Vineet Gupta 2013-01-18 31 } ca15c8ecd588dd Vineet Gupta 2013-01-18 32 :::::: The code at line 27 was first introduced by commit :::::: d4067395519b40d4ee9b7c26347233e4ae59f900 arc: Prefer unsigned int to bare use of unsigned :::::: TO: Jinchao Wang :::::: CC: Vineet Gupta -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki