[kbuild-all] Re: [PATCH v2 4/4] btrfs: assert sizes of ioctl structures

On Tue, Jul 14, 2020 at 05:01:21AM +0800, kernel test robot wrote: > Hi Johannes, > > I love your patch! Yet something to improve: > > [auto build test ERROR on v5.8-rc5] > [cannot apply to kdave/for-next btrfs/next next-20200713] > [If your patch is applied to the wrong git tree, kindly drop us a note. > And when submitting patch, we suggest to use as documented in > https://git-scm.com/docs/git-format-patch] > > url: https://github.com/0day-ci/linux/commits/Johannes-Thumshirn/Two-furhter-a... > base: 11ba468877bb23f28956a35e896356252d63c983 > config: x86_64-randconfig-a016-20200713 (attached as .config) > compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 02946de3802d3bc65bc9f2eb9b8d4969b5a7add8) > 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 x86_64 cross compiling tool for clang build > # apt-get install binutils-x86-64-linux-gnu > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp(a)intel.com&gt; > > All error/warnings (new ones prefixed by >>): > > In file included from <built-in>:1: > In file included from ./usr/include/linux/btrfs_tree.h:5: > >> ./usr/include/linux/btrfs.h:35:15: error: expected parameter declarator > static_assert(sizeof(struct btrfs_ioctl_vol_args) == 4096); > ^ Does that mean that clang (11.0) does not support static_assert? We aren't doing anything special here, include only the standard kernel headers and use macros as intended.