linux-kernel - Re: [PATCH] arm: lib: implement aeabi_uldivmod via div64_u64

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Date:   Tue, 19 Jul 2022 00:50:23 +0800
From:   kernel test robot <lkp@...el.com>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        Arnd Bergmann <arnd@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Miguel Ojeda <ojeda@...nel.org>,
        Ard Biesheuval <ardb@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Gary Guo <gary@...yguo.net>,
        Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm: lib: implement aeabi_uldivmod via div64_u64_rem

Hi Nick,

I love your patch! Perhaps something to improve:

[auto build test WARNING on soc/for-next]
[also build test WARNING on arm/for-next linus/master v5.19-rc7 next-20220718]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Nick-Desaulniers/arm-lib-implement-aeabi_uldivmod-via-div64_u64_rem/20220716-231205
base:   https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next
config: arm-ixp4xx_defconfig (https://download.01.org/0day-ci/archive/20220719/202207190057.1gn0emAr-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d74b88c69dc2644bd0dc5d64e2d7413a0d4040e5)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://github.com/intel-lab-lkp/linux/commit/f0441d7a00899e433705accb0da58c94f4ff8808
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Nick-Desaulniers/arm-lib-implement-aeabi_uldivmod-via-div64_u64_rem/20220716-231205
        git checkout f0441d7a00899e433705accb0da58c94f4ff8808
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> arch/arm/lib/aeabi_uldivmod.c:17:15: warning: no previous prototype for function '__aeabi_uldivmod' [-Wmissing-prototypes]
   struct result __aeabi_uldivmod(u64 numerator, u64 denominator)
                 ^
   arch/arm/lib/aeabi_uldivmod.c:17:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   struct result __aeabi_uldivmod(u64 numerator, u64 denominator)
   ^
   static 
   1 warning generated.


vim +/__aeabi_uldivmod +17 arch/arm/lib/aeabi_uldivmod.c

    16	
  > 17	struct result __aeabi_uldivmod(u64 numerator, u64 denominator)

-- 
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https://01.org/lkp