Messages in this thread | | | Date | Mon, 25 Jul 2022 04:14:48 +0800 | From | kernel test robot <> | Subject | [linux-stable-rc:linux-5.15.y 6874/8723] arch/arm/lib/xor-neon.c:30:2: warning: This code requires at least version 4.6 of GCC |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.15.y head: a9e2d8e52e1c0d87c0fa4f9d2d38e210aabed515 commit: e16cc79b0f916069de223bdb567fa0bc2ccd18a5 [6874/8723] lib/crypto: add prompts back to crypto libraries config: arm-buildonly-randconfig-r006-20220724 (https://download.01.org/0day-ci/archive/20220725/202207250449.BYMZbIA2-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 12fbd2d377e396ad61bce56d71c98a1eb1bebfa9) 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://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=e16cc79b0f916069de223bdb567fa0bc2ccd18a5 git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc linux-5.15.y git checkout e16cc79b0f916069de223bdb567fa0bc2ccd18a5 # 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@intel.com>
All warnings (new ones prefixed by >>):
>> arch/arm/lib/xor-neon.c:30:2: warning: This code requires at least version 4.6 of GCC [-W#warnings] #warning This code requires at least version 4.6 of GCC ^ 1 warning generated.
vim +30 arch/arm/lib/xor-neon.c
01956597cbc46d Ard Biesheuvel 2013-05-17 16 01956597cbc46d Ard Biesheuvel 2013-05-17 17 /* 01956597cbc46d Ard Biesheuvel 2013-05-17 18 * Pull in the reference implementations while instructing GCC (through 01956597cbc46d Ard Biesheuvel 2013-05-17 19 * -ftree-vectorize) to attempt to exploit implicit parallelism and emit 01956597cbc46d Ard Biesheuvel 2013-05-17 20 * NEON instructions. 01956597cbc46d Ard Biesheuvel 2013-05-17 21 */ 01956597cbc46d Ard Biesheuvel 2013-05-17 22 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6) 01956597cbc46d Ard Biesheuvel 2013-05-17 23 #pragma GCC optimize "tree-vectorize" 01956597cbc46d Ard Biesheuvel 2013-05-17 24 #else 01956597cbc46d Ard Biesheuvel 2013-05-17 25 /* 01956597cbc46d Ard Biesheuvel 2013-05-17 26 * While older versions of GCC do not generate incorrect code, they fail to 01956597cbc46d Ard Biesheuvel 2013-05-17 27 * recognize the parallel nature of these functions, and emit plain ARM code, 01956597cbc46d Ard Biesheuvel 2013-05-17 28 * which is known to be slower than the optimized ARM code in asm-arm/xor.h. 01956597cbc46d Ard Biesheuvel 2013-05-17 29 */ 01956597cbc46d Ard Biesheuvel 2013-05-17 @30 #warning This code requires at least version 4.6 of GCC 01956597cbc46d Ard Biesheuvel 2013-05-17 31 #endif 01956597cbc46d Ard Biesheuvel 2013-05-17 32
:::::: The code at line 30 was first introduced by commit :::::: 01956597cbc46df072f20f90a40eebe356200c38 ARM: crypto: add NEON accelerated XOR implementation
:::::: TO: Ard Biesheuvel <ard.biesheuvel@linaro.org> :::::: CC: Ard Biesheuvel <ard.biesheuvel@linaro.org>
-- 0-DAY CI Kernel Test Service https://01.org/lkp
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