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X-CSE-ConnectionGUID: EzFgIMUNRC6AjbYnlEYJ1g== X-CSE-MsgGUID: JDBNkEA2RWKGKBxRKRrdaA== X-IronPort-AV: E=McAfee;i="6700,10204,11253"; a="31324309" X-IronPort-AV: E=Sophos;i="6.12,147,1728975600"; d="scan'208";a="31324309" Received: from orviesa007.jf.intel.com ([10.64.159.147]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Nov 2024 01:37:11 -0800 X-CSE-ConnectionGUID: T4p8b4V4QAKl0jAGQaorIg== X-CSE-MsgGUID: q7Kel42VRcGmmOcxnFcM1Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,147,1728975600"; d="scan'208";a="87726525" Received: from lkp-server01.sh.intel.com (HELO bcfed0da017c) ([10.239.97.150]) by orviesa007.jf.intel.com with ESMTP; 12 Nov 2024 01:37:11 -0800 Received: from kbuild by bcfed0da017c with local (Exim 4.96) (envelope-from ) id 1tAnKd-0000fn-2G; Tue, 12 Nov 2024 09:37:07 +0000 Date: Tue, 12 Nov 2024 17:36:44 +0800 From: kernel test robot To: John Ousterhout , netdev@vger.kernel.org, linux-api@vger.kernel.org Cc: oe-kbuild-all@lists.linux.dev, John Ousterhout Subject: Re: [PATCH net-next v2 12/12] net: homa: create Makefile and Kconfig Message-ID: <202411121722.Oxq727h0-lkp@intel.com> References: <20241111234006.5942-13-ouster@cs.stanford.edu> Precedence: bulk X-Mailing-List: linux-api@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: <20241111234006.5942-13-ouster@cs.stanford.edu> Hi John, kernel test robot noticed the following build warnings: [auto build test WARNING on net-next/main] url: https://github.com/intel-lab-lkp/linux/commits/John-Ousterhout/net-homa-define-user-visible-API-for-Homa/20241112-074535 base: net-next/main patch link: https://lore.kernel.org/r/20241111234006.5942-13-ouster%40cs.stanford.edu patch subject: [PATCH net-next v2 12/12] net: homa: create Makefile and Kconfig config: mips-allyesconfig (https://download.01.org/0day-ci/archive/20241112/202411121722.Oxq727h0-lkp@intel.com/config) compiler: mips-linux-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241112/202411121722.Oxq727h0-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/202411121722.Oxq727h0-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from arch/mips/include/asm/div64.h:89, from include/linux/math.h:6, from include/linux/kernel.h:27, from include/linux/cpumask.h:11, from arch/mips/include/asm/processor.h:15, from arch/mips/include/asm/thread_info.h:16, from include/linux/thread_info.h:60, from include/asm-generic/current.h:6, from ./arch/mips/include/generated/asm/current.h:1, from include/linux/sched.h:12, from include/linux/audit.h:12, from net/homa/homa_impl.h:12, from net/homa/homa_outgoing.c:7: net/homa/homa_outgoing.c: In function 'homa_new_data_packet': >> include/asm-generic/div64.h:222:35: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types] 222 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ | ^~ net/homa/homa_outgoing.c:108:9: note: in expansion of macro 'do_div' 108 | do_div(segs, max_seg_data); | ^~~~~~ In file included from arch/mips/include/asm/bug.h:5, from include/linux/bug.h:5, from net/homa/homa_impl.h:10: >> include/asm-generic/div64.h:234:32: warning: right shift count >= width of type [-Wshift-count-overflow] 234 | } else if (likely(((n) >> 32) == 0)) { \ | ^~ include/linux/compiler.h:76:45: note: in definition of macro 'likely' 76 | # define likely(x) __builtin_expect(!!(x), 1) | ^ net/homa/homa_outgoing.c:108:9: note: in expansion of macro 'do_div' 108 | do_div(segs, max_seg_data); | ^~~~~~ net/homa/homa_outgoing.c: In function 'homa_message_out_fill': >> include/asm-generic/div64.h:222:35: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types] 222 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ | ^~ net/homa/homa_outgoing.c:233:9: note: in expansion of macro 'do_div' 233 | do_div(segs_per_gso, max_seg_data); | ^~~~~~ >> include/asm-generic/div64.h:234:32: warning: right shift count >= width of type [-Wshift-count-overflow] 234 | } else if (likely(((n) >> 32) == 0)) { \ | ^~ include/linux/compiler.h:76:45: note: in definition of macro 'likely' 76 | # define likely(x) __builtin_expect(!!(x), 1) | ^ net/homa/homa_outgoing.c:233:9: note: in expansion of macro 'do_div' 233 | do_div(segs_per_gso, max_seg_data); | ^~~~~~ vim +222 include/asm-generic/div64.h ^1da177e4c3f41 Linus Torvalds 2005-04-16 215 ^1da177e4c3f41 Linus Torvalds 2005-04-16 216 /* The unnecessary pointer compare is there ^1da177e4c3f41 Linus Torvalds 2005-04-16 217 * to check for type safety (n must be 64bit) ^1da177e4c3f41 Linus Torvalds 2005-04-16 218 */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 219 # define do_div(n,base) ({ \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 220 uint32_t __base = (base); \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 221 uint32_t __rem; \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 @222 (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ 911918aa7ef6f8 Nicolas Pitre 2015-11-02 223 if (__builtin_constant_p(__base) && \ 911918aa7ef6f8 Nicolas Pitre 2015-11-02 224 is_power_of_2(__base)) { \ 911918aa7ef6f8 Nicolas Pitre 2015-11-02 225 __rem = (n) & (__base - 1); \ 911918aa7ef6f8 Nicolas Pitre 2015-11-02 226 (n) >>= ilog2(__base); \ c747ce4706190e Geert Uytterhoeven 2021-08-11 227 } else if (__builtin_constant_p(__base) && \ 461a5e51060c93 Nicolas Pitre 2015-10-30 228 __base != 0) { \ 461a5e51060c93 Nicolas Pitre 2015-10-30 229 uint32_t __res_lo, __n_lo = (n); \ 461a5e51060c93 Nicolas Pitre 2015-10-30 230 (n) = __div64_const32(n, __base); \ 461a5e51060c93 Nicolas Pitre 2015-10-30 231 /* the remainder can be computed with 32-bit regs */ \ 461a5e51060c93 Nicolas Pitre 2015-10-30 232 __res_lo = (n); \ 461a5e51060c93 Nicolas Pitre 2015-10-30 233 __rem = __n_lo - __res_lo * __base; \ 911918aa7ef6f8 Nicolas Pitre 2015-11-02 @234 } else if (likely(((n) >> 32) == 0)) { \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 235 __rem = (uint32_t)(n) % __base; \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 236 (n) = (uint32_t)(n) / __base; \ c747ce4706190e Geert Uytterhoeven 2021-08-11 237 } else { \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 238 __rem = __div64_32(&(n), __base); \ c747ce4706190e Geert Uytterhoeven 2021-08-11 239 } \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 240 __rem; \ ^1da177e4c3f41 Linus Torvalds 2005-04-16 241 }) ^1da177e4c3f41 Linus Torvalds 2005-04-16 242 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki